20030147 Ver 0_Monitoring Plan_20070511

Yadkin-Pee Dee River Hydroelectric Project
FERC No. 2206
MONTHLY WATER QUALITY STUDY
OF LAKE TILLERY, BLEWETT FALLS
LAKE, AND ASSOCIATED TAILWATERS
Water Resources Work Group
Issues No. 7 and 8 - Lake Tillery and Blewett Falls Lake and
Tailwaters Water Quality
PROGRESS ENERGY
APRIL 2006
C 2006 Progress Energy
TABLE OF CONTENTS
Section Title
ACRONYM LIST .................................................................................................... AL-1
EXECUTIVE SUMMARY ..........................................................................................ES-1
SECTION 1 - INTRODUCTION .................................................................................... 1-1
No.
1.1 Study Overview ............................................................................................................. 1-1
1.2 Surface Water Quality Classifications of Waters Associated with the Project ............. 1-2
1.3 Identified Sources of Water Quality Impairment of Waters Associated with the
Project ............................................................................................................................ 1-2
SECTION 2 - STUDY OBJECTIVES ............................................................................. 2-1
SECTION 3 - SITE DESCRIPTION ............................................................................... 3-1
3.1 General Locale Description ........................................................................................... 3-1
3.1.1 Tillery Development .......................................................................................3-1
3.1.2 Blewett Falls Development ............................................................................. 3-4
3.2 Sampling Sites ...............................................................................................................3-5
3.2.1 Lake Tillery and Pee Dee River Tailwaters below Tillery Development....... 3-5
3.2.2 Blewett Falls Lake and Pee Dee River Tailwaters below Blewett
Falls Development .......................................................................................... 3-6
SECTION 4 - METHODS ............................................................................................ 4-1
4.1 Conduct of Study ........................................................................................................... 4-1
4.2 Data Reduction and Analysis ........................................................................................ 4-2
4.3 Quality Assurance and Quality Control ........................................................................ 4-4
SECTION 5 - RESULTS AND DISCUSSION .................................................................. 5-1
5.1 Climatological and Hydrological Conditions during the Study Period ................... ...... 5-1
5.2 Lake and Tailwater Flow Conditions During Water Quality Sampling Trips ........ ...... 5-8
5.3 Water Quality Results .............................................................................................. .... 5-12
5.3.1 Lake Tillery ............................................................................................... .... 5-12
5.3.2 Pee Dee River Reach from the Tillery Hydroelectric Plant to Blewett
Falls Lake .................................................................................................. .... 5-30
5.3.3 Blewett Falls Lake .................................................................................... .... 5-48
5.3.4 Pee Dee River Reach below the Blewett Falls Hydroelectric Plant ......... .... 5-67
i
TABLE OF CONTENTS
(Continued)
Section Title
5.3.5 Longitudinal Trends in Water Quality Parameters for Project Waters
During 2004 .................................................................................................. 5-80
5.3.6 State Water Quality Standards at Project Reservoirs and Tailwaters........... 5-85
SECTION 6 - SUMMARY ........................................................................................... 6-1
SECTION 7 - REFERENCES ........................................................................................ 7-1
APPENDICES
No.
APPENDIX A - RAW DATA LISTING FOR WATER QUALITY PARAMETERS COLLECTED
IN LAKE TILLERY, THE PEE DEE RIVER, AND THE ROCKY RIVER
DURING 2000, 2001, 2002, AND 2004
APPENDIX B - RAW DATA LISTING FOR WATER QUALITY PARAMETERS COLLECTED
IN BLEWETT FALLS LAKE AND THE PEE DEE RIVER DURING 1999,200 1,
AND 2004
APPENDIX C - RAW DATA LISTING FOR WATER CHEMISTRY PARAMETERS
COLLECTED IN LAKE TILLERY, THE PEE DEE RIVER, AND THE ROCKY
RIVER DURING 2000, 2002, AND 2004.
APPENDIX D - RAW DATA LISTING FOR WATER CHEMISTRY PARAMETERS
COLLECTED IN BLEWETT FALLS LAKE AND THE PEE DEE RIVER
DURING 1999, 2001, AND 2004.
APPENDIX E - MONTHLY TRENDS IN SOLIDS, TURBIDITY, AND NUTRIENT
CONSTITUENTS IN LAKE TILLERY, REACH 1 OF THE PEE DEE RIVER,
ROCKY RIVER, AND THE HEADWATERS OF BLEWETT FALLS LAKE
DURING 2004
APPENDIX F - MONTHLY TRENDS IN SOLIDS, TURBIDITY, AND NUTRIENT
CONSTITUENTS IN BLEWETT FALLS LAKE AND REACH 2 OF THE PEE
DEE RIVER DURING GENERATION FLOWS IN 2004
ii
LIST OF FIGURES
Title
Figure 3-1 Map of the Tillery Development and Pee Dee River (Reach 1) showing
transects used in the monthly water quality study during 2004 ..........................
Figure 3-2 Map of the Blewett Falls Development and Pee Dee River (Reach 2) showing
transects used in the monthly water quality study during 2004 ..........................
Figure 5-1 Comparison of monthly precipitation from 1999 to 2001 (gray bars) with the
30-year average (black line) and ranges of precipitation (vertical lines) for the
period 1971 to 2000 ............................................................................................
Figure 5-2 Estimated stream flow (cfs) of the Pee Dee River (Reach 1) below the Tillery
Hydroelectric Plant, 1999 to 2004 ......................................................................
Figure 5-3 Daily mean stream flow (cfs) (thin line) and historical long-term daily mean
stream flow (thick line) for period of record at USGS gaging stations located
on the Pee Dee River, North Carolina-South Carolina, below the Blewett
Falls Hydroelectric Plant ....................................................................................
Figure 5-4 Daily mean lake levels for Lake Tillery and Blewett Falls Lake during years
that monthly water quality surveys were conducted at the Tillery and Blewett
Falls developments, 1999 to 2004. (Note: No surveys were conducted in
2003.) ..................................................................................................................
Figure 5-5 Total monthly flow (generation flows and dam spillage) from the Tillery
Development during years that water quality surveys were conducted at the
Yadkin-Pee Dee River Hydroelectric Project, 1999 to 2004. (Note: No wate
quality surveys were performed in 2003.) ..........................................................
Figure 5-6 Total monthly flow (generation flows and dam spillage) from the Blewett
Falls Development during years that water quality surveys were conducted at
the Yadkin-Pee Dee River Hydroelectric Project, 1999 to 2004. (Note: No
water quality surveys were performed in 2003.) ...............................................
Figure 5-7 Total generation flows (cfs) at the time that water quality sampling was
conducted at the Tillery and Blewett Falls lakes and tailwaters, 1999 to 2004.
(Note: Samples were collected at Tillery Development during 2000, 2002,
and 2004 and at Blewett Falls Development during 1999, 2001, and 2004.)....
Figure 5-8 Temporal and spatial trends in chlorophyll a concentrations in Lake Tillery
during 2000, 2002, and 2004. (Note: Statistical results among lake stations
are shown within each graph with different letter superscripts indicating
age No.
.3-2
.3-3
.5-2
.5-4
.5-5
.5-7
r
.5-9
5-10
5-11
significantly different mean values.) .............................................................. ... 5-21
Figure 5-9 Monthly water temperature profiles in Lake Tillery during 2004 .................. ... 5-28
Figure 5-10 Monthly DO profiles in Lake Tillery during 2004 ......................................... ... 5-29
Figure 5-11 Monthly water temperature profiles in Lake Tillery during 2000 .................. ... 5-31
Figure 5-12 Monthly DO profiles in Lake Tillery during 2000 ......................................... ... 5-32
Figure 5-13 Monthly water temperature profiles in Lake Tillery during 2002 .................. ... 5-33
Figure 5-14 Monthly DO profiles in Lake Tillery during 2002 ......................................... ... 5-34
Figure 5-15 Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations TY1B and TY12B in Reach 1 of the Pee Dee River
iu
LIST OF FIGURES
(Continued)
Title
Figure 5-16
Figure 5-17
Figure 5-18
Figure 5-19
Figure 5-20
Figure 5-21
Figure 5-22
Figure 5-23
Figure 5-24
Figure 5-25
5-45
5-46
TY1B and TY1213.) ........................................................................................... 5-47
below the Tillery Hydroelectric Plant and Station RR located in the Rocky
River during 2000. (Note: No data were collected for Rocky River, Station
RR, during 2000) .............................................................................................
Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations TY1B and TY12B in Reach 1 of the Pee Dee River
below the Tillery Hydroelectric Plant and Station RR located in the Rocky
River during 2002 ............................................................................................
Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations TY1B and TY12B in Reach 1 of the Pee Dee River
below the Tillery Hydroelectric Plant and Station RR in the Rocky River
during 2004. (Note: Power generation flow data are plotted for Stations
Temporal and spatial trends in chlorophyll a concentrations in Blewett Falls
Lake during 1999, 2001, and 2004. (Note: Statistical results among lake
stations are shown within each graph with different letter superscripts
indicating significantly different mean values.) ................................................ 5-56
Monthly water temperature profiles in Blewett Falls Lake during 2004........... 5-61
Monthly DO profiles in Blewett Falls Lake during 2004 .................................. 5-62
Monthly water temperature profiles in Blewett Falls Lake during 1999........... 5-63
Monthly DO profiles in Blewett Falls Lake during 1999 .................................. 5-64
Monthly water temperature profiles in Blewett Falls Lake during 2001........... 5-65
Monthly DO profiles in Blewett Falls Lake during 2001 .................................. 5-66
Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations BF1B, BF213, BF313, and BF413 in Reach 2 of the Pee
Dee River below the Blewett Falls Hydroelectric Plant during 1999 ............... 5-77
No.
Figure 5-26 Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations BF1B, BF213, BF313, and BF413 in Reach 2 of the Pee
Dee River below the Blewett Falls Hydroelectric Plant during 2001 ............... 5-78
Figure 5-27 Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations BF1B, BF213, BF313, and BF413 in Reach 2 of the Pee
Dee River below the Blewett Falls Hydroelectric Plant during 2004. (Note:
Power generation data were plotted for all stations.) ........................................ 5-79
Figure 5-28 Spatial trends (means and ranges) in solids constituents, turbidity, and
specific conductance in Lake Tillery, Blewett Falls Lake, and Reaches 1 and
2 of the Pee Dee River under power generation flow conditions during 2004.
(Note: Statistical results are given for each water quality parameter and
different letter superscripts indicate statistically different mean values.) ......... 5-81
Figure 5-29 Spatial trends (means and ranges) in nutrient constituents in Lake Tillery,
Blewett Falls Lake, and Reaches 1 and 2 of the Pee Dee River under power
generation flow conditions during 2004. (Note: Statistical results are given
1V
LIST OF FIGURES
(Continued)
Title
for each water quality parameter and different letter superscripts indicate
statistically different mean values.) ................................................................... 5-82
Figure 5-30 Spatial trends (means and ranges) in anions and cations in Lake Tillery,
Blewett Falls Lake, and Reaches 1 and 2 of the Pee Dee River under power
generation flow conditions during 2004. (Note: Statistical results are given
for each water quality parameter and different letter superscripts indicate
statistically different mean values.) ................................................................... 5-83
No.
v
LIST OF TABLES
Table
Title
No.
Table 3-1 Coordinates for water quality stations located in Lake Tillery, Blewett Falls
Lake, and associated tailwaters of the Pee Dee River (Reaches 1 and 2) below
the Tillery and Blewett Falls Hydroelectric Plants during the monthly water
quality study, 2004 ............................................................................................... 3-5
Table 4-1 Laboratory analytical methods, sample holding times, preservative types, and
laboratory detection limits for water chemistry parameters analyzed for the
monthly water quality studies at the Tillery and Blewett Falls developments.... 4-2
Table 5-1 Means, ranges (in parentheses), and spatial trends of selected water chemistry
parameters from the surface and bottom waters at Stations TY132, TYF2, and
TYK2 of Lake Tillery during 2004 .................................................................... 5-13
Table 5-2 Comparison of spatial trends of annual means for selected water chemistry
parameters from the surface waters of Lake Tillery (Stations TY132, TYF2,
and TYK2) for 2000, 2002, and 2004 ................................................................ 5-15
Table 5-3 Comparison of temporal trends of annual means for selected water chemistry
parameters from the surface waters of Lake Tillery (Stations TY132, TYF2,
and TYH2) for 2000, 2002, and 2004 ................................................................ 5-17
Table 5-4 Paired t-test results of differences between surface and bottom waters for
selected water chemistry parameters in Lake Tillery during 2004 .................... 5-19
Table 5-5 Paired t-test results of differences between surface and bottom waters for
selected water chemistry parameters in Lake Tillery during 2000, 2002, and
2004 .................................................................................................................... 5-20
Table 5-6 Kendall's tau b correlation coefficients of daily average lake level versus
water quality parameters in the surface waters of Lake Tillery (Stations
TY132, TYF2, and TYK2) for the years 2000, 2002, and 2004 ......................... 5-23
Table 5-7 Kendall's tau b correlation coefficients of daily average flow versus water
quality parameters in the surface waters of Lake Tillery (Stations TY132,
TYF2, and TYK2), the Pee Dee River tailwaters below the Tillery
Hydroelectric Plant (Station TY113), and the Rocky River (Station RR) for
the years 2000, 2002, and 2004 ......................................................................... 5-24
Table 5-8 Means, ranges (in parentheses), and spatial trends of water quality parameters
from the surface waters (0.2 m depth) at stations within Lake Tillery during
2000, 2002, and 2004 ......................................................................................... 5-25
Table 5-9 Means, ranges (in parentheses), and spatial trends of selected water chemistry
parameters during the no power generation period in Reach 1 of the Pee Dee
River below the Tillery Hydroelectric Plant and the Rocky River during
2004 .................................................................................................................... 5-35
Table 5-10 Means, ranges (in parentheses), and spatial trends of selected water chemistry
parameters during the power generation period in Reach 1 of the Pee Dee
River below the Tillery Hydroelectric Plant and the Rocky River during
2004 .................................................................................................................... 5-37
vi
LIST OF TABLES
(Continued)
Table Title Page No.
Table 5-11 Paired t-test results of differences for selected water chemistry parameters
between power generation and no power generation flows at Stations TY1B
and TY1213 in Reach 1 of the Pee Dee River below the Tillery Hydroelectric
Plant during 2004 ............................................................................................... 5-39
Table 5-12 Comparison of temporal trends of annual means for selected water chemistry
parameters from bottom waters at Station TY132 in Lake Tillery and surface
waters at Stations TY1B and TY12B in the Pee Dee River below the Tillery
Hydroelectric Plant during 2000, 2002, and 2004 ............................................. 5-41
Table 5-13 Spatial trends of mean concentrations of selected water chemistry parameters
at Station BF132 (bottom waters) in Lake Tillery, Stations TY1B and TY12B
in Reach 1, Rocky River, and Station BFH2 in Blewett Falls Lake headwaters
during 2004. Power generation flow data (except Rocky River) were used
for the analysis ................................................................................................... 5-43
Table 5-14 Means, ranges (in parentheses), and spatial trends of water chemistry
parameters from the surface and bottom waters of Blewett Falls Lake
(Stations BF132, BFF2, and BFH2) during 2004 ............................................... 5-50
Table 5-15 Comparison of spatial trends of annual means for selected water chemistry
parameters at Stations BF132, BFF2, and BFH2 from the surface waters of
Blewett Falls Lake for 1999, 2001, and 2004 .................................................... 5-52
Table 5-16 Comparison of temporal trends of annual means for selected water chemistry
parameters from the surface waters of Blewett Falls Lake (Stations BF132,
BFF2, and BFH2) for 1999, 2001, and 2004 ..................................................... 5-53
Table 5-17 Paired t-test results of differences between surface and bottom waters at
Stations BF132 and BFF2 for selected water chemistry parameters in Blewett
Falls Lake during 2004 ...................................................................................... 5-55
Table 5-18 Kendall's tau b correlation coefficients of daily average lake level versus
water quality parameters in the surface waters of Blewett Falls Lake (Stations
BF132, BFF2, and BFH2) for the period of 1999, 2001, and 2004 .................... 5-57
Table 5-19 Kendall's tau b correlation coefficients of daily average flow (cfs) versus
water quality parameters in the surface waters of Blewett Falls Lake (Stations
BF132, BFF2, and BFH2), the Pee Dee River tailwaters below the Blewett
Falls Hydroelectric Plant (Stations BFH3 and BF213), and the lower Pee Dee
River (Stations BF133 and BF134) for the years 1999, 2001, and 2004 ............. 5-59
Table 5-20 Means, ranges (in parentheses), and spatial trends of selected water chemistry
parameters from the surface waters in Reach 2 of the Pee Dee River below
the Blewett Falls Hydroelectric Plant during power generation flows, 2004.... 5-68
Table 5-21 Comparison of temporal trends of annual means for selected water chemistry
parameters from the surface waters at Station BF132 in Blewett Falls Lake
and surface waters at Stations BF113, BF213, BF313, and BF413 in the Pee Dee
River below the Blewett Falls Hydroelectric Plant during 1999, 2001, and
2004 .................................................................................................................... 5-71
vu
LIST OF TABLES
(Continued)
Table Title
No.
Table 5-22 Means, ranges (in parentheses), and spatial trends of selected water chemistry
parameters from the surface waters at Stations BF1B and BF213 in Reach 2 of
the Pee Dee River below the Blewett Falls Hydroelectric Plant during the no
power generation and power generation flow periods, 2004 ............................. 5-72
Table 5-23 Comparison of temporal trends of annual means for selected water chemistry
parameters at Stations BF 113, BF213, BF313, and BF413 of Reach 2 of the Pee
Dee River below the Blewett Falls Hydroelectric Plant for 1999, 2001, and
2004 .................................................................................................................... 5-74
Table 5-24 Water quality parameters measured at Project waters that have applicable
North Carolina or South Carolina water quality standards ................................ 5-86
Table 5-25 Sample size (n) and the total number and percent of exceedances (in
parenthesis) of water quality parameters measured during this study for the
applicable North Carolina water quality standards at the Tillery and Blewett
Falls Hydroelectric Plants, 1999-2004 ............................................................... 5-87
vui
Acronym List
Federal/State Agencies
Advisory Council on Historic Preservation (ACHP)
Federal Aviation Administration (FAA)
Federal Energy Regulatory Commission (FERC)
National Park Service (NPS)
National Marine Fisheries Service (NMFS)
National Oceanic and Atmospheric Administration (NOAA)
National Resource Conservation Service (MRCS) formerly known as Soil Conservation Service
National Weather Service (NWS)
North Carolina Department of Environment and Natural Resources (NCDENR)
North Carolina Environmental Management Commission (NCEMC)
North Carolina Department of Natural and Economic Resources, Division of Environmental
Management (NCDEM)
North Carolina Division of Parks and Recreation (NCDPR)
North Carolina Division of Water Resources (NCDWR)
North Carolina Division of Water Quality (NCDWQ)
North Carolina Natural Heritage Program (NCNHP)
North Carolina State Historic Preservation Officer (NCSHPO)
North Carolina Sustainable Energy Organization (NCSEO)
North Carolina Wildlife Resources Commission (NCWRC)
South Carolina Department of Natural Resources (SCDNR)
South Carolina Department of Health and Environmental Control (SCDHEC)
State Historic Preservation Office (SHPO)
U. S. Army Corps of Engineers (ACOE)
U. S. Department of Interior (DOI)
U.S. Environmental Protection Agency (USEPA)
U.S. Fish and Wildlife Service (USFWS)
U.S. Geological Survey (USGS)
U. S. Department of Agriculture (USDA)
U.S. Forest Service (USES)
Other Entities
Alcoa Power Generating, Inc., Yadkin Division (APGI)
Appalachian State University (ASU)
Atlantic States Marine Fisheries Commission (ASMFC)
Carolina Power & Light (CP&L)
Electric Power Research Institute (EPRI)
Energy Information Administration (EIA)
Progress Energy (Progress)
Robust Redhorse Conservation Commission (RRCC)
The Nature Conservancy (TNC)
University of North Carolina at Chapel Hill (UNCCH)
Virginia Institute of Marine Science (VIMS)
AL-1
List
Facilities/Places
Yadkin -Pee Dee River Project (entire two-development project including both powerhouses, dams
and impoundments)
Blewett Falls Development (when referring to dam, powerhouse and impoundment)
Blewett Falls Dam (when referring to the structure)
Blewett Falls Hydroelectric Plant (when referring to the powerhouse)
Blewett Falls Lake (when referring to the impoundment)
North Carolina Museum of Natural Sciences (NCMNS)
Tillery Development (when referring to dam, powerhouse and impoundment)
Tillery Dam (when referring to the structure)
Tillery Hydroelectric Plant (when referring to the powerhouse)
Lake Tillery (when referring to the impoundment)
Documents
401 Water Quality Certification (401 WQC)
Draft Environmental Assessment (DEA)
Environmental Assessment (EA)
Environmental Impact Statement (EIS)
Final Environmental Assessment (FEA)
Initial Consultation Document (ICD)
Memorandum of Agreement (MOA)
Memorandum of Understanding (MOU)
National Register of Historic Places (NRHP)
National Wetland Inventory (NWI)
Notice of Intent (NOI)
Notice of Proposed Rulemaking (NOPR)
Preliminary Draft Environmental Assessment (PDEA)
Programmatic Agreement (PA)
Scoping Document (SD)
Shoreline Management Plan (SMP)
Laws/Regulations
Clean Water Act (CWA)
Code of Federal Regulations (CFR)
Electric Consumers Protection Act (ECPA)
Endangered Species Act (ESA)
Federal Power Act (EPA)
Fish and Wildlife Coordination Act (FWCA)
National Environmental Policy Act (NEPA)
National Historic Preservation Act (NHPA)
AL-2
List
Terminology
Alternative Relicensing Process (ALP)
Analysis-of-variance (ANOVA)
Area of Potential Effect (APE)
Biological oxygen demand (BOD)
Chemical oxygen demand (COD)
Combustion turbine generator (CTG)
Cubic feet per second (cfs)
Degrees Celsius (C)
Degrees Fahrenheit (F)
Dissolved oxygen (DO)
Feet (ft)
Gallons per day (gpd)
Geographic Information Systems (GIS)
Gigawatt Hour (GWh)
Global Positioning System (GPS)
Grams (g)
Hectares (ha)
Horsepower (hp)
Kilogram (kg)
Kilowatts (kW)
Kilowatt-hours (kWh)
Least significant difference (LSD)
Mean Sea Level (msl)
Megawatt (MW)
Megawatt-hours (MWh)
Micrograms per liter (gg/L)
Milligrams per liter (mg/L)
Millimeter (mm)
Million gallons per day (mgd)
National Geodetic Vertical Datum (NGVD)
National Wetlands Inventory (NWI)
Non-governmental Organizations (NGOs)
Ounces (oz.)
Outstanding Remarkable Value (ORV)
Parts per billion (ppb)
Parts per million (ppm)
Photovoltaics (PV)
Pounds (lbs.)
Power Factor (p.f)
Probable Maximum Flood (PMF)
Programmable logic controller (PLC)
Project Inflow Design Flood (IDF)
Proportional stock density (PSD)
Quality Assurance Project Plan (QAPP)
AL-3
List
Quality Assurance/Quality Control (QA/QC) Program
Protection, mitigation, and enhancement (PM&E)
Rare, Threatened, and Endangered Species (RTE)
Ready for Environmental Assessment (REA)
Relative stock density (RSD)
Renewable fuels module (RFM)
Resource Work Groups(RWG)
Revolutions per Minute (rpm)
Rights-of-way (ROW)
River mile (RM)
Stakeholders (federal and state resource agencies, NGOs, and other interested parties)
Technical Working Group (TWG)
Total organic carbon (TOC)
Volts (V)
Young-of-year (YOY)
AL-4
Executive Summary
A monthly water quality survey program was conducted at the Tillery and Blewett Falls
developments during 2004 to characterize the existing water quality conditions in the Project
reservoirs and downstream tailwaters, including the effects of the Rocky River tributary inflow.
Historical data collected from Project-associated waters from 1999 to 2002 were also evaluated to
examine temporal and spatial trends in water quality. The Water Resources Work Group had
identified aneed for additional water quality studies at Project reservoirs andtailwaters during study
plan scoping meetings held in 2003. Specific objectives of this study were to: (1) address meeting
state water quality standards and supporting designated uses in the reservoirs and tailwaters; (2)
evaluate the Project operation effects on water quality in both reservoirs and tailwaters; (3)
determine cumulative effects of nutrient and sediment loading on reservoirs and tailwaters; and (4)
assess water quality effects of Rocky River inflow.
Lake Tillery was characterized as a deep, mesotrophic reservoir with moderate nutrient and solids
concentrations, moderate water clarity, and weak buffering capacity with low to moderate anion and
cation concentrations. The short hydraulic retention time of the reservoir (average of 8.3 days),
coupled with the "filtering effect" of the four upstream reservoirs (i.e., High Rock Lake, Tuckertown
Reservoir, Narrows Reservoir, and Falls Lake), influenced the nutrient and solids concentrations,
turbidity values, and the trophic status of the reservoir. In contrast to Lake Tillery, Blewett Falls
Lake was a shallow, nutrient-enriched eutrophic reservoir with greater solids and turbidity levels and
a short retention time (average of 1.9 days). Water quality in Blewett Falls Lake as well as a large
upstream portion of the Pee Dee River was influenced in varying degrees by inflow from Tillery
Hydroelectric Plant, the Rocky River, and other tributaries within this river reach. Chlorophyll a (an
indirect indicator of algal production) concentrations were lower on average in Lake Tillery than in
Blewett Falls Lake. Algal dynamics in both reservoirs were largely influenced by the reservoirs'
short hydraulic retention times which limited nutrient uptake by phytoplankton and subsequent
production. Additionally, the turbid water conditions in Blewett Falls Lake also limited light
penetration for photosynthesis. There was only one instance of chlorophyll a concentrations
exceeding the North Carolina water quality standard in either reservoir during the survey period.
Long-term data collected by the North Carolina Division of Water Quality (NCDWQ) and Progress
Energy indicated the water quality conditions in the reservoirs appeared to have either improved or
not appreciably changed since the 1980s depending upon the examined parameter and reservoir.
Both reservoirs continued to support their designated water quality use designations based on recent
assessments by the NCDWQ during 2002.
The short hydraulic retention time of both Project reservoirs also influenced the spatial pattern of
water quality parameters. Most water quality parameters were fairly uniform with few significant
longitudinal differences (i.e., upstream to downstream) observed at either reservoir. The only
exceptions at Lake Tillery were significantly greater nitrate + nitrite-nitrogen and total phosphorus
concentrations in the upper and middle reservoir areas when compared to concentrations in the lower
reservoir near the dam. Significant increases in these two nutrient parameters may have reflected
inputs from the Yadkin River upstream of the reservoir and/or the Uwharrie River and algal
dynamics and nutrient uptake rates.
There were significant temporal differences in the water quality of each reservoir which reflected the
precipitation levels and river inflow and outflow within agiven year. Generally, solids constituents,
ES-1
Executive
especially total dissolved solids, most nutrient constituents, anions and cations, chemical oxygen
demand, total alkalinity, and specific conductance were greater during the lower flow, drought years
(1999 to 2002) when compared to 2004, a year with greater flow levels. Lower reservoir inflow and
outflow, coupled with evaporative processes, during the lower flow years would tend to increase
total dissolved solids, nutrients, anions and cations, and specific conductance. Higher chemical
oxygen demand values were likely the result of greater organic decomposition with increased
hydraulic retention time in lower flow years.
Temperature stratification and dissolved oxygen (DO) depletion dynamics in each reservoir were
influenced by reservoir depth, the relative amount of precipitation and inflow within the river basin,
and the amount of power generation within a given year. Lake Tillery experienced strong seasonal
temperature stratification patterns usually occurring from May until September although
stratification could either be prolonged or disrupted by one to two months depending upon
precipitation levels and inflow and outflow conditions. The shallow nature of Blewett Falls Lake,
coupled with river inflow and power plant operations, influenced the temperature stratification and
DO depletion patterns within the reservoir. Unlike Lake Tillery which had a well-defined
temperature stratification period, Blewett Falls Lake usually had very weak to moderate temperature
stratification which could be disrupted with reservoir water column turnover during high river
inflows and increased power plant generation. The epilmnion, metalimnion, and hypolimnion strata
were not as well defined in Blewett Falls Lake during the stratification period compared with Lake
Tillery. Temperature stratification and DO depletion were also independent processes in Blewett
Falls Lake and therefore did not closely correspond as observed in Lake Tillery.
Dissolved oxygen depletion occurred during the late spring, summer, and early fall months (usually
May until September) in both reservoirs. The presence and persistence of low to anoxic DO
conditions in the hypoliminion depended upon precipitation and flow conditions within a given year.
In Lake Tillery, there were very strong top to bottom differences in DO during the stratification
period with low to anoxic DO conditions (< 1 to 4 mg/L) occurring at the 12 to 19 m depth of the
intake structure. The seasonal DO depletion was not quite as pronounced at Blewett Falls Lake and
anoxic conditions were usually confined to the bottom two to three meters in the reservoir water
column. Blewett Falls Lake also did not have avery large volume of anoxic water present during the
stratification period as observed at Lake Tillery. The release of low DO water from both reservoirs
during power generation periods resulted in corresponding low DO conditions in the Project
tailwaters. Low DO conditions were also observed in each power plant tailwater during no power
generation periods which suggested other factors algal respiration, organic matter decomposition,
tributary inflow of low DO water, and/or power plant wicket gate leakage were also influencing
DO dynamics in the tailwater areas, particularly during no generation periods.
Inflow and outflow at the Proj ect reservoirs to river tailwaters was largely influenced by large-scale
precipitation events in the river basin and upstream reservoir releases within the river basin,
especially during years with average or above average precipitation levels. During low-flow years,
reservoir outflow was mainly influenced by power plant generation. Large-scale precipitation events
in the river basin resulted in rapid turnover and movement of water through the reservoirs and
tributaries, such as the Rocky River, and increased the influx of total suspended solids, turbidity,
nutrients, and certain metals in reservoirs and tailwaters. During periods of lower inflow,
concentrations of total dissolved solids, anions and cations, and corresponding measurements of
ES-2
Executive
specific conductance increased. Point and nonpoint discharges, coupled with the amount of inflow
and the length of the hydraulic retention time, also affected water quality in the reservoirs and
tailwaters.
The water quality of Lake Tillery was influenced by the lake's position in the Yadkin chain of lakes
as the upstream reservoirs provided a "filtering effect" on solids, nutrients, and other water quality
constituents. Downstream of the Tillery Development, water quality in the immediate tailwaters,
from the Tillery Dam to the Rocky River confluence located 5 miles downstream, generally reflected
water quality conditions in Lake Tillery during power generation and no power generation periods.
The Rocky River, and to a lesser extent other tributaries within the tailwaters reach below Tillery,
were significant sources of increased loading of nitrate + nitrite-nitrogen, total phosphorus, total
organic carbon, chemical oxygen demand, anions and cations, and copper. The relative effect of the
Rocky River and other tributaries on water quality in Pee Dee River reach below the Tillery
Hydroelectric Plant was flow dependent, both from the tributaries themselves and from the amount
of generation releases from the power plant. Inputs from the Rocky River and other tributaries
influenced the water quality characteristics of Blewett Falls Lake, which were markedly different
when compared to Lake Tillery. The relatively short retention time of both reservoirs under normal
conditions resulted in little change in the water quality characteristics as water passed through the
Project reservoirs, particularly Blewett Falls Lake. Water quality characteristics in the immediate
tailwaters reach below the Blewett Falls Development were similar to Blewett Falls Lake. With
increasing distance downstream, water quality in the lower Pee Dee River was changed by
watershed inputs due to physiographic and land use changes and nonpoint and point source
discharges.
Operations of the Tillery and Blewett Falls Hydroelectric Plants did result in seasonally low DO
concentrations in the tailwaters located downstream of each power plant. Dissolved oxygen
concentrations were below the North Carolina instantaneous and daily average water quality
standards during power plant generation periods in the summer months during the survey years.
Other water quality variations from North Carolina water quality standards in Project reservoirs and
tailwaters were the result of larger scale watershed effects and point and nonpoint source discharges,
not the result of Project operations.
ES-3
Section I - Introduction
1.1 Study Overview
Progress Energy is currently relicensing the Blewett Falls and Tillery developments (i.e., Yadkin-
Pee Dee River Hydroelectric Project No. 2206) with the Federal Regulatory Commission (FERC).
As part of the relicensing process, Progress Energy established Resource Work Groups (RWGs)
during May 2003 to identify environmental issues associated with Project operations and develop
study plans, if necessary, specific to Project lands and associated lakes and tailwaters. The Water
Resources Work Group identified the need for additional water quality studies of the Project
reservoirs and tailwaters (i.e., Progress Energy [2004a], Water RWG Issue Nos. 7 and 8, "Lake
Tillery and Blewett Falls Lakes & Tailwaters Water Quality"). The purpose of these studies was to
evaluate the water quality in the Project reservoirs and the Pee Dee River below the Blewett Falls
and Tillery Hydroelectric Plants. Specifically, these water quality studies addressed: (1) meeting
state water quality standards and supporting designated uses in the reservoirs and tailwaters; (2)
evaluating the Project operation effects on the water quality in both reservoirs and downstream
tailwaters; (3) determining cumulative effects of nutrient and sediment loading on reservoirs and
tailwaters; and (4) assessing water quality effects of Rocky River inflow. Cumulative effects are
defined as the summation of the effects or observed changes in water quality from both point and
nonpoint discharge sources into a water body.
Three studies were developed to address the water quality issues: (1) a monthly sampling program
at the Blewett Falls and Tillery developments to characterize the existing water quality conditions in
the Project reservoirs and downstream tailwaters, including the effects of the Rocky River tributary
inflow; (2) an intensive assessment of the spatial and temporal patterns of temperature and DO
concentrations in the Pee Dee River downstream of each power plant; and (3) continuous monitoring
of water temperature and DO from May through November in the upper, mid, and lower areas of the
NCDWQ designated 303(d) impaired river sections below each hydroelectric dam. These studies
also characterized the water quality of the Project tailwaters with and without power plant
generation.
This report addresses the monthly water quality sampling program conducted at Blewett Falls and
Tillery developments to characterize the existing water quality conditions in the Project reservoirs
and downstream tailwaters, including the effects of the Rocky River tributary inflow. Contemporary
water quality data collected during 2004 at both developments, in addition to historical data
collected during the 1999 to 2002 period, will be evaluated in this report. Separate reports have
been issued that address water quality Issues No. 2 and 3, cited above (Progress Energy 2005a and
2005b).
Historical water quality studies that have been conducted in the Yadkin-Pee Dee River Basin,
including the Project reservoirs and tailwaters, were reviewed and presented in Progress Energy's
Initial Consultation Document (Progress Energy 2003). This review includes both the North
Carolina and South Carolina portions of the river.
1-1
Section 1 Introduction
1.2 Surface Water Quality Classifications of Waters Associated with the
Project
Surface water quality classifications are designations applied to surface water bodies, which define
the best uses to be protected within the identified water body. These classifications have an
associated set of water quality standards to protect the uses (NCDWQ 2004a, 2004b; South Carolina
Department of Health and Environmental Control [SCDHEC] 2004a, 2004b).
Lake Tillery has been classified by the NCDWQ as a drinking water supply (Class WS-IV, B, CA)
and suitable for primary and secondary recreation uses, including fishing, wildlife, fish, aquatic life
propagation and survival, and agriculture (NCDWQ 2005). There are two municipal water supply
withdrawals from Lake Tillery, one intake for the Town of Norwood and one intake for Montgomery
County (Figure 3-1). Blewett Falls Lake and the Pee Dee River reach from the Tillery Dam to
Blewett Falls Lake have also been classified by the NCDWQ as drinking water supplies (Classes
WS-IV and WS-V, B) and suitable for primary (Class B) and secondary recreation uses (Class C)
including fishing, wildlife, fish, aquatic life propagation and survival, and agriculture. There are two
municipal water supply withdrawals from Blewett Falls Lake, one intake for Anson County and one
intake for Richmond County (Figure 3-2). Both lakes were classified as fully supporting the
classified uses in a 1998 to 1999 lake assessment conducted by the NCDWQ (NCDWQ 2000, 2002).
The Pee Dee River reach below the Blewett Falls Development to the North Carolina-South
Carolina state line was classified as Class C or suitable for secondary recreational uses.
In South Carolina, the Pee Dee River (also known as the Great Pee Dee River) from the state line to
Florence County has been classified as "FW" or freshwaters, which are suitable for primary and
secondary contact recreation, and as a source for drinking water (SCDHEC 2001). This designation
also includes waters that are suitable for fishing and the survival and propagation of a balanced
indigenous aquatic community. The monitoring sites at U.S. Highway 1 at Cheraw, South Carolina
and at U. S. 15 and 401 near Society Hill, South Carolina were fully supporting aquatic life uses
duringthe Pee Dee River watershed assessment conducted by the SCDHEC during 2001 (SCDHEC
2001).
1.3 Identified Sources of Water Quality Impairment of Waters Associated with
the Project
Impaired water quality refers to water bodies that do not met state designated water quality use
classifications, such as water supply, fishing, or propagation of aquatic life (NCDWQ 2004a, 2006).
Best professional judgment is applied by the responsible state water quality agency, along with
numeric and narrative standards criteria and anti-degradation requirements defined in 40 CFR, Part
131, when evaluating the ability of a water body to serve its uses. Impaired water bodies are
identified by the state water quality agency through a listing process of Section 303(d) of the Clean
Water Act.
The Pee Dee River from Tillery Dam (i.e., Norwood Dam) to the confluence of Turkey Top Creek,
(24.5 river km or 15.2 RM), was listed as impaired for aquatic life due to low DO concentrations
(NCDWQ 2003, 2004a, 2006) (Figure 3-1). In addition, the 6.3-mile segment of the Pee Dee River
1-2
Section 1 Introduction
from Blewett Falls Dam to the confluence of Hitchcock Creek was also listed as impaired for aquatic
life due to low DO concentrations (Figure 3-2). Hydro modification (dam releases) and minor
municipal point discharge sources (below Tillery Dam only for latter source) were listed as the
potential sources of impairment. The river segment below the Blewett Falls Dam was also listed as
impaired for fish consumption due to a statewide fish consumption advisory for elevated mercury
levels. This consumption advice is based on a regional advisory for mercury which extends south
and east of U. S. Interstate 85 to the North Carolina coastline (NCDWQ 2003, 2006).
Several large tributaries of the Pee Dee River below the Tillery and Blewett Falls developments
within the study reach have been listed as impaired by the NCDWQ for North Carolina waters
(NCDWQ 2003, 2004a, 2006). Below the Tillery Development, two sections of the upper Rocky
River have been listed as impaired for aquatic life due to urban runoff/storm sewers and municipal
wastewater point sources. These sections are from the headwater source to the Reedy Creek
confluence and from the confluence of Reedy Creek to the confluence of Dutch Buffalo Creek.
Violation of water quality standards for turbidity and fecal coliform were listed for the Rocky River
section from the headwaters source to the Reedy Creek confluence. The NCDWQ ambient
monitoring data for the Rocky River from 1996 to 2001 indicated that DO concentrations were
adequate, pH values were occasionally high, and specific conductance values indicated
anthropogenic impacts (NCDWQ 2002). Brown Creek, from the mouth of Lick Creek to the
confluence with the Pee Dee River, has an overall impaired use due to impaired biological integrity
and low DO. Agricultural use was listed as a potential source of the Brown Creek impairment.
Below the Blewett Falls Development, Hitchcock Creek, including McKinney and Ledbetter Lakes,
has afish consumption advisory due to elevated mercury levels in fish tissue. The NCDWQ (2002)
has also documented low DO and pH conditions as well as industrial and wastewater discharges in
Hitchcock Creek during past years (NCDWQ 2002).
1-3
Section 2 - Study Objectives
The purpose of this study is to evaluate the water quality in the Project reservoirs and the Pee Dee
River below the Tillery and Blewett Hydroelectric Plants (Progress Energy 2004a). This study was
conducted to address water quality issues pertaining to: (1) meeting state water quality standards
and supporting designated uses in both reservoirs and tailwaters; (2) evaluating the Project operation
effects on the water quality in both reservoirs and downstream tailwaters; (3) determining
cumulative effects of nutrient and sediment loading on reservoirs and tailwaters; and (4) assessing
water quality effects of Rocky River inflow into the Pee Dee River.
The specific study objective was to conduct amonthly sampling program at the Tillery and Blewett
developments to characterize the existing water quality conditions in the Project reservoirs and
downstream tailwaters, including the effects of Rocky River tributary inflow. An aspect of the study
was to characterize the Project tailwaters with and without power plant generation flows at selected
river stations. In addition to the contemporary data collected during the study period of 2004,
comparable historical data from both developments for the period of 1999 to 2002 was also utilized
to evaluate temporal changes in water quality relative to basinwide annual precipitation patterns and
relative inflow.
2-1
Section 3 - Site Description
3.1 General Locale Description
The Project is located on the Yadkin-Pee Dee River in south central North Carolina (Figures 3-1 and
3-2). The Yadkin-Pee River basin is the second largest in North Carolina covering 7,213 square
miles as measured at the North Carolina-South Carolina state line (NCDWQ 2002). The Yadkin-Pee
Dee River originates near the town of Blowing Rock and flows northeasterly for approximately 100
miles from the Blue Ridge Mountains into the Piedmont physiographical region. As the river turns
southeast, it enters an area in Central North Carolina that has experienced considerable urban
growth. This growing urban area extends from Charlotte to Raleigh/Durham and is known as the
Piedmont Crescent (Appalachian State University [ASU] 1999). Just to the south of the Piedmont
Crescent, the region enters an area known as the Uwharrie Lakes Region. This region is named for
the chain of six reservoirs located along this reach of the Yadkin-Pee Dee River, two of which are
Lake Tillery and Blewett Falls Lake. It is in this region that the Uwharrie River joins the Yadkin
River at the upper end of Lake Tillery to form the Pee Dee River.
The flow of the Yadkin-Pee Dee River is regulated by a federal flood control development and six
hydroelectric developments on the main stem of the river. The first development, traveling
downstream from the headwaters, is the W. Scott Kerr Dam, a federal flood control project. The
next four developments make up the Yadkin Project (FERC No. 2197). These four hydroelectric
developments, High Rock, Tuckertown, Narrows, and Falls, are owned and operated by Alcoa
Power Generating, Inc. (APGI) and are located along a38-mile stretch of the river (river miles [RM]
272 to 234). High Rock Reservoir is operated as a storage reservoir and serves as the principal
storage and water regulation facility for the lower Yadkin-Pee Dee River (APGI 2002).
The next two hydroelectric developments on the river, located at RM 218 and 188 are the Tillery and
Blewett Falls developments, which constitute Progress Energy's Yadkin-Pee Dee River Project. The
primary purpose of the Project is to provide peaking and load-following generation. Its ability to
provide such benefits and meet other flow-related needs is largely dependent on the schedule of
flows being released from upstream reservoirs. Currently, an agreement between APGI and
Progress Energy governs the release of waters from APGI developments to the Progress Energy
developments. Additional Project related information is discussed in the Initial Consultation
Document for the Project (Progress Energy 2003).
3.1.1 Tillery Development
Construction of the Tillery Development began in 1926 and was completed in 1928. Lake Tillery
extends approximately 15 miles upstream to the tailrace of the Falls Project powerhouse. At the
normal maximum operating elevation of 277.3 Ili, Lake Tillery has an average depth of 23.6 ft and a
maximum depth of approximately 71 ft at the dam. The depth ofthe intake extends from 39 to 62 ft
(12 to 19 m) below the lake surface at normal maximum pool elevation. The reservoir has a surface
NAVD 88 datum. Unless otherwise noted, all data are NAVD 88 datum. The NAVD 88 datum is 0.9 ft lower than
the 1929NGVD datum (NAD 29).
3-1
Section 'l
Tillery Hydroelectric Development - Water Quality Sampling Stations

Uwharrie Ri ver

APGI Falls Oam j?`

I'?s TYK2 w c

s
Mountain -
?
Creek -
H TYH2
DarRxuva 28r?DRAnms Arm no snmv vwxm6rs (
?:,?,
t
&amM Lo[atim.?uuiplion l?brveJ ' '3
Pll Ab[v h. as adaeNe - p pl tsiA..e (Fled 2IdA) ?
TY2 BxM NC. NV rnxy P's1bMp ®tdjua abovx sBwlaea (Fl?E2I>d) W-
Ns Abv C¢•- ca?b ? (P.dSaltb) ? ? -?:?
rV3 Sxtm Y <oea]un -. l.rsl•. alvd(RM210,r) }

??
TYF2
rrs sep... H;,.,-,r to9aae (ru,naossl 'i
y
N6 Coeu]vr ie :d nm?ey iop treek above HlrvrettFAlls Lrke (HI!d ]Ol 8) ?
}
//

Jacobs' I -
-Creek -

Lake Tillery, --
STANLY `
9 TYD2
COUNTY y
f
Cedar
Creek
9 TYB2
A MONTGOMERY
?' (1 COUNTY
- - -Clarks
-
•i f

=2 Ab C nm fP 1. P (FM 211 ?J
?Tillery Cam Creek
? I

TY1

?RR
`-
II
-
i
TY2
' TYCM1
(
l
f
b
,
i
R
k
R
r
oc
y
ive
TY 3

-TY5
RICHMOND
COUN TY A TYCM4

TYCM2
-TY5 D TYCM3
t
ANSON '
COUNTY
rl
• ?
i
- TY4
'fi,?? `
f//
Le end
9 It
/ '
rf,
?cgw3m cro n^?do?:
p a -u?am.o rrnm 3 a?«.s ?i Turkey Top
_
! Cr
k
i
('h? nnn' v irwe[ta oo snevrar<;ecx ? . ?/ii/l7J ee
J?j1/l , ff
rl, crndm 1-- +ng- n --d cayy?

Mie Brown Creek
0 05 ? 2 ] 4 ; 6 y TY12B
Site
coxr>»uausaares plr>.urrmoraros cocarlavs
smm? Locarionl?xevPan ?e:nure>
TiChAI N.C. Hi•ln•-r731E3g (R([21 S:n

TChd3 ZI C. Higl rl? E -d (P 313
r.?cMq
Dor,uaednvfcoNlu- ?.ocru<?«vroP aEi,(El?dzn)E)
Figure 3-1 Map of the Tillery Development and Pee Dee River (Reach 1) showing
transects used in the monthly water quality study during 2004.
LIOx11RY lVA1HR QlLtG?11'lC3?dLt]'RY SIArmr?
t i:e ?ley
SYa4a. LuvOor,Dnmytio., (Rf•'a bLle)
PfR2 L - _S {R(1 t t
rmz 1 - m n ,aiRlaa39a)
rYlrz 3Nd :?oo-b.ba•lr c. xi???yz+m(erdaxa8)
rYla lllp¢rrsxvoi urmp rip Bw?mas?P.mxae.l?
nxz vmp?.%?oo:m.ui. beea•pale thm.,eieme
Smm?lRetaso.ll
Pae DaldabeLnv DDev HvdrocieMa[ Elnt
w.w-. La[???emytim? ?aMeV
SY3B B Ioa xarhoad ak np yL i4ue ?B3rt2159)
NUB li.c. Hi'ynm 1N Bnd?(FSt a13.9?
AA Ro hyR' U'.}3i61 Sa Pnd? (46mdes
urearnm of Pex Der Rvttwnlnue)
3-2
Section 3
Site
Blewett Falls Hydroelectric Development -Water Quality Sampling Stations
r. Little River
+y BFH2? Mountain
Creek
BFF2 RICHMOND
ANSON
COUNTY COUNTY
Blewett Falls Lakel
Buffalo-
BM Upcerresenoixb°Imu Gxv,l'Llmds awa(ItM 1923)
' ,.t_ FBFB 2 Cartledge
;.v Creek _ ` ''? i Creek
IBlewett Falls Dam
9 BFB2 J BF1
A BFCM1A
A BFCM1 r
r;; B F613
fj 1'? BF2 Thompson
l Creek Legend
[-=B 3 BF18 mn t.n a cn-
/ - e mrtioo
??/ M ?rve r c - aid DoRatvev rri,e?
A BFCM2 Island PL c? oaps(el mpa rea Nmen ror a:m ao. pan
Creek- 'Hitchcock
Creek
>y BF3B
?R MARLBORO
COUNTY
Jones A BFCM3 .' ,
-Creek '
9DCIEWHILL,5C '
BF6L
_ CHESTERFIELD This sectionofrrver
COUNTY not to scale
2
Flat N
Creek 7yny(
SI: Slate LiwP
MARLBORO DARLINGTON
COUNTY COUNTY DILLON
COUNTY
Westfield
Creek 'Black
Creek
,,. BF61.`
FLORENCE
CHESTERFIELD COUNTY
COUNTY d 1'' FLORENCE,4 -?ABF4B
& BF2B
' ntlee
o ps I z a a s a
Figure 3-2 Map of the Blewwett Falls Development and Pee Dee River {Reach 2} showing
transects used in the monthly water quality study during 2004.
CIX4'LIN[70U5 WATER QLNLTIY MOMORLOCATIMS
s+aean r« nar>;p?n tAe s hills)
BFCMI At Bw,aletJb J? D x?reTplmn td- (RIJI ISS.I)
BFCMIA
Beba•ceronWa>epantirg iAe taikac°ard dazn(PM 1815)
BECIvi2 U.S. Hi Jvray 99brv3pe rkd41A4'IJ

BFC2oi3 Fiat
Bebx m,abansw YHitclex): Cree): (RM 1£LIj
iNTBNavE TEhmBAATnAE AND no srlrov TA.iNSE crs
r,?x: p.oeamn ?,ipaon (Rh•erbllle)
BFl Sli?1,Sybelwr perwrvla zepwntssg tlv ta4ace -d dam (RM 1880)
BF2 Belo 6ipl lmd ,d Carlbdp Creek. cwdbaaxee (EA.41??
BFB M. u s. x;gwray r4 Bxia?° (?ri l??
BF4 Belo H_H AC?eek coMuazne(PM 181.1)
BFS 6elo [[ill kce,dbc°na azd J?nv,Cwek shoal (RIvf 176A)
BF6 Ezta=r UC Higlvrayl E,idge at Cbsm=r,SC (F1d 164.7)
MgNi'HLY WATER QUALTTYICHEMIBTAY STATIONR
B4 vett FaA Sahe
Slemn Locetion?ecviption (Rberhlile)
BFB2 Lav reazdam(PSri1W3J
BFD2 Mid azisland (Ed 1£94)

BFH2 Upyrresenoub°adaramxs (RM 195 ZJ
P ce DceAve:bebsv Blnvett Falls }I+droelatre AaN
5tarion Loeetionikuripiion (RverMae)
BFUH Belo,rfle>afeHbao`llu+°in Be PO+r°r PLnv tailrw.e (AM 1?.1J
?FI? fl. Ilyl 9Dudp (Fed IIIO'!)
BF2E U.S. Hi?J-s l B,id? tCl-SC )U1 1643)
BF3E pJS. Hi?I x?15lWIBxidg atSxiNy Hil1,SC (A1d 146 L)
BF4E U.S. Hi?J av?6,n]I Bride rear Florereg SC (FIJI 100.?)
3-3
Section 3 Site Descripti
area of approximately 5,697 acres and a total volume of 5.85 x 109 ft3. The average retention time
for the reservoir is approximately 8.3 days at normal maximum operating pool elevation based on
1983 to 2000 inflow data. Lake Tillery is dendritic in shape with several large tributary arms (e.g.,
Mountain Creek, Jacobs Creek, and Cedar Creek complex). The reservoir has a shoreline length of
approximately 118 miles with 55 percent of the shoreline in residential or commercial development
(Progress Energy 2003). The remaining shoreline areas are forested, pasture, or agricultural.
The inflows into Lake Tillery consist primarily of the outflow from the APGI's Falls Development
coupled with inflow from the Uwharrie River. The Uwharrie River contributes 8.4 percent of total
inflow volume, based on watershed area size. The current Progress Energy license allows for
drawdowns at Lake Tillery of up to 22 ft below full pond. However, over the past several years,
Progress Energy has voluntarily made its best efforts to operate Lake Tillery within a 4-11 range
under normal circumstances and much of the time operating within a 2-11 range except during
FERC-required inspection and maintenance periods (12-11 drawdown) (Progress Energy 2003).
Outflows fromthe Tillery Development flow into BlewettFalls Lake after passing through a 17-mile
reach of the Pee Dee River. Under normal circumstances, it takes approximately 8 hours for releases
from the Tillery Development to be observed at the Blewett Falls powerhouse (Progress Energy
2003).
3.1.2 Blewett Falls Development
The Blewett Falls' dam and powerhouse are located 17 miles upstream of the North Carolina-South
Carolina state border. The construction of this facility began in 1905 and was brought into service in
1912. The normal maximum pool elevation is 177.2 ft' and the reservoir extends approximately
11 miles upstream. The average depth is 10.8 ft. and the maximum depth is approximately 35 ft.
The depth of the intake extends from 20 to 33 ft. (6 to 10 m) below the lake surface at normal
maximum pool elevation. The surface area of the reservoir at normal operating level is
approximately 2,866 acres with atotal volume of 1.35 x 109 ft3. The mean hydraulic retention time
is 1.9 days at normal maximum operating pool elevation based on 1983 to 2000 inflow data
Blewett Falls Lake is relatively narrow with few large tributary arms. The reservoir has a shoreline
length of approximately 46 miles including mainland and island shoreline areas. The Blewett Falls
shoreline is relatively undeveloped with surrounding lands mainly forested (Progress Energy 2003).
Some limited residential development exists along the shoreline, primarily in the lower lake.
The Blewett Falls Development is operated in coordination with the upstream Tillery Development.
The hydraulic capacity of Blewett Falls Lake is significantly less than Lake Tillery; therefore,
Blewett Falls Lake must anticipate flows from Lake Tillery generation and begin generating in
advance of flows reaching the lake. The normal operation of Blewett Falls Lake results in a daily
drawdown of approximately 2 to 3 ft below the normal maximum operating level. This drawdown
provides storage capacity needed to regulate flows from the Tillery Development. The Blewett Falls
generating units normally begin operation at the same time that the Tillery Plant begins generation.
Generation at Blewett Falls is usually stopped by midnight to allow the reservoir to refill. This
operation is consistent year round and varies only with seasonal availability of water (Progress
Energy 2003).
3-4
Section 3 Site Descripti
Periodic maintenance can require the lowering of the reservoir levels at both developments. At
Tillery drawdowns are typically associated with the maintenance of the steel spillway gates, repairs
to the trashrack system, or repairs to the upstream slope of the earthen embankment. Drawdowns
required at Blewett Falls Lake are similar to the Tillery Development except that the most frequent
maintenance requirement is to service the 4-ft-high, wooden flashboards atop the spillway. During
periods of high flow, such as those encountered with the passing of tropical storm systems during
September of 2004, damage or loss of these flashboards may occur and repairs require the lake to be
drawn down about 4 to 5 ft over a period of time (Progress Energy 2003).
3.2 Sampling Sites
3.2.1 Lake Tillery and Pee Dee River Tailwaters below Tillery Development
Water quality and chemistry sampling was conducted at five stations within Lake Tillery (Table 3-1
and Figure 3-1). These station locations were: (1) Station TY132, lower lake area near dam and
intake structure at RM 216.3; (2) Station TYD2, lower lake area at RM 219.7; (3) Station TYF2,
mid-lake area at RM 224.3; (4) Station TYH2, upper lake area at RM 228.1; and (5) Station TYK2,
upper lake headwaters at RM 230.1. All five stations were sampled for water quality parameters
(i.e., temperature, DO, pH, specific conductance, and turbidity) while only Stations TY132, TYF2,
and TYK2 were sampled for water chemistry parameters (i.e., solids, nutrients, anion and ion
constituents, total alkalinity, hardness, chemical oxygen demand [COD], biological oxygen demand
[BOD], and selected trace metals).
Table 3-1 Coordinates for water quality stations located in Lake Tillery, Blewett Falls
Lake, and associated tailwaters of the Pee Dee River (Reaches 1 and 2) below
the Tillery and Blewett Falls Hydroelectric Plants during the monthly water
quality study, 2004.
Studv Location/Station Station Latitude Station Longitude
TYB2 35°12' 31.85" 80°04' 06.64"
TYD2 35°14' 45.13" 80°05' 42.24"
TYF2 35°18' 28.85" 80° 04' 47.41"
TYH2 35°21' 34.67" 80°03' 56.66"
TYK2 35° 23'22.75" 80°04' 01.03"
Pee Dee River below Tillery
Hydroelectric Plant-Reach I
TY1B 35°12' 13.35" 80°03' 50.98"
TY12B 35° 05'06.96" 79°59' 49.78"
RR 35° 11' 37.49" 80° 06' 47.81
Blewett Falls Lake
BFB2 34° 59'22.61 79° 52' 57.13"
BFD2 35° 00'01.34" 79° 53' 50.56"
BFF2 35° 01' 53.85" 79° 52' 58.22"
BFH2 35° 03'37.24" 79° 54' 00.03"
3-5
Section 3 Site Descripti
Study Location/Station Station Latitude Station Longitude
Pee Dee River below Blewett Falls
Hydroelectric Plant-Reach 2
BFOB 34° 58' 58.95" 79° 52' 30.21
BF1B 34°56' 44.68" 79°52' 11.03"
BF2B 34° 42'26.20" 79°52' 29.29"
BF3B 34°31' 36.07" 79°49' 58.13"
BF4B 34°12' 15.62" 79°32' 53.89"
Two stations in the Pee Dee River below the Tillery Hydroelectric Plant (i.e., Reach 1) were
sampled for water quality and chemistry parameters (Table 3-1 and Figure 3-1). Station TY 1B was
located in the power plant tailrace at RM 215.9, and Station TY12B was located justbelow the N.C.
Highway 109 Bridge at RM 203.9. Station TY 12B was located approximately one mile downstream
of Brown Creek, a major tributary within Reach 1. In addition, the Rocky River (i.e., Station RR)
was sampled for water quality and chemistry parameters, and this station was located justbelow the
N.C. Highway 52 Bridge, approximately 4.6 miles upstream of the confluence with the Pee Dee
River. The Rocky River enters the Pee Dee River approximately 5 miles downstream of the Tillery
Hydroelectric Plant. Station TY113 is located upstream of the Rocky River confluence while Station
TY12B is located approximately 12 miles downstream of the Tillery Hydroelectric Plant and
approximately 7 miles downstream of the Rocky River confluence. The Rocky River watershed
includes several urban areas such as Mooresville, Kannapolis, Concord, Huntersville, and eastern
portions of Charlotte.
Besides the Rocky River and Brown Creek, other named tributaries entering Reach 1 include Clarks
Creek, Cedar Creek, Turkey Top Creek, Savannah Creek, and the Little River (Figure 3-1). Clarks
Creek enters into Reach 1 from the east just downstream of Station TY1B. The Town of Mount
Gilead's Wastewater Treatment Plant discharges into Clarks Creek. The other tributaries enter into
Reach 1 below Station TY12B and the surrounding lands within these watersheds are primarily
forested and agricultural areas.
3.2.2 Blewett Falls Lake and Pee Dee River Tailwaters below Blewett Falls
Development
Water quality and chemistry sampling was conducted at four stations in Blewett Falls Lake
(Table 3-1 and Figure 3-2). These station locations were: (1) Station BF132, lower lake area near
dam and entrance of intake fore bay arm at RM 188.3; (2) Station BFD2, lower lake area near island
at RM 189.4; (3) Station BFF2, mid lake area below the Grassy Islands complex at RM 192.3; and
(4) Station BFH2, upper lake headwaters at RM 195.2. All four stations were sampled for water
quality parameters (i.e., temperature, DO, pH, specific conductance, Secchi disk transparency, and
turbidity). Stations BF132, BFF2, and BF112 were only sampled for water chemistry parameters (i.e.,
solids, nutrients, anion and ion constituents, total alkalinity, hardness, COD, BOD, and selected trace
metals). Station BFD2 was only sampled in November and December 2004 for water quality while
the other three stations were sampled monthly from January through December.
Five stations in the Pee Dee River reach (i.e., Reach 2) below the Blewett Falls Hydroelectric Plant
were utilized for the water quality survey. These stations encompassed an 88-mile reach of the Pee
3-6
Section 3 Site Descripti
Dee River which included both North Carolina and South Carolina portions of the river. Reach 2
included the Piedmont Fall Line (Stations BFOB, BF 113, and BF2B) and upper Coastal Plain zones
(Stations 3B and 413). All stations were sampled for water quality and chemistry parameters
(Table 3-1 and Figure 3-1). Station BFOB was located in the immediate tailrace area below the
hydroelectric plant near RM 188.1. Station BF1B was located just below the U. S. Highway 74
Bridge at RM 184.7. Station BF213 was located justbelow the U.S. Highway 1 Bridge near Cheraw,
South Carolina at RM 164.7. Station BF313 was located just below the U. S. Highway 15/401 Bridge
near Society Hill, South Carolina at RM 146.6. Station BF4B was located just below the U.S.
Highway 76/301 Bridge near Florence, South Carolina at RM 100.2.
Major named tributaries that enter into Reach 2 in the vicinity of water quality stations include
Cartledge Creek, Island Creek, Hitchcock Creek, Little and Jones Creeks, Westfield Creek,
Thompson Creek, Crooked Creek, Spot Mill Creek, Cedar Creek, and Three Creeks. Surrounding
watersheds of these tributaries include forest, agriculture, industrial, and urban areas depending upon
the tributary.
3-7
Section 4 - Methods
4.1 Conduct of Study
Vertical profiles of water quality parameters (i.e., water temperature, dissolved oxygen, pH, specific
conductance, and turbidity) were measured monthly at stations located in Lake Tillery and Blewett
Falls Lake. Measurements were taken with an YSI® Model 650 multi-parameter instrument at the
surface (0.2 m) and 1-m intervals from the surface to bottom of each lake station. Secchi disk
transparency depth (m) was also measured in the surface waters at each lake station while turbidity
was measured at the surface and bottom waters at each lake station.
Water chemistry samples were collected concurrently with the water quality vertical profiles.
Surface and bottom water chemistry samples were collected at Stations TY132 and TYF2 in Lake
Tillery and Stations BFB2 and BFF2 in Blewett Falls Lake. Only surface samples were collected at
Station TYK2 in Lake Tillery and Station BFH2 in Blewett Falls Lake because previous water
quality surveys indicated that these headwater stations were shallow and well-mixed (Progress
Energy 2003). Chlorophyll a samples were collected from a composite sample taken from the photic
zone, defined as the surface, the Secchi disk transparency depth, and twice the Secchi disk
transparency depth. Chlorophyll a samples were transferred to opaque bottles, placed on ice, and
kept in the dark until analysis.
For the river stations located in Reaches 1 and 2, including the Rocky River, water quality and
chemistry samples were collected at the surface (0.2 m) in the mid-channel. Secchi disk
transparency and chlorophyll a samples were not collected at the river stations.
All water quality and chemistry data were collected from the lake and river stations during power
generation conditions during 2004. Water quality and chemistry samples at Stations TY1B and
TY 12B in Reach 1 and Stations BF 1B and BF2B in Reach 2 were also collected during low flow or
no power generation conditions during 2004. The 2004 sampling program was designed to
standardize month-to-month comparisons of the data relative to power generation conditions and to
allow a comparison of water quality characteristics between the generation and no generation
periods at the selected river stations below each power plant. Samples collected during the no power
generation period were collected at least six hours after the last power generation event or when
stream gages indicated stable, low flow conditions. In other survey years, samples were collected
under a variety of flow conditions ranging from no power generation to power generation conditions.
Water chemistry and chlorophyll a samples were collected using a nonmetallic Van Dorn sampler,
transferred to labeled sample containers, and transported on ice to the laboratory. Chain-of-custody
forms documented sample collection and transfer from the field to the laboratory. Samples were
collected, preserved, and analyzed according to standard methods described in USEPA (1983) and
APHA (1998) for the specified parameters. Table 4-1 lists laboratory analytical methods, sample
holding times and preservative types, and the laboratory detection limits for the water chemistry
parameters, including chlorophyll a. To ensure accuracy and precision of analytical methods,
quality control checks were achieved using detection levels, percent recovery of known standards,
analytical blanks, spikes, duplicates, and reference and control standards.
4-1
Section 4 Methods
Table 4-1 Laboratory analytical methods, sample holding times, preservative types,
and laboratory detection limits for water chemistry parameters analyzed for
the monthly water quality studies at the Tillery and Blewett Falls
developments.
Parameter Analytical Method Holding Time Preservation Type Laboratory
Detection Limit
Total solids EPA 160.3 7 days Cool, 4'C 10.0 mg/L
Total dissolved solids EPA 160.1 7 days Cool, 4'C 10.0 mg/L
Total suspended solids EPA 160.2 7 davs Cool. 4'C 1 mg/L
Total nitrogen Calculation 28 days H,SO, to pH <2 0.10 mg/L
Total Kjeldahl nitrogen EPA 351.2 28 days H,SO, to pH <2 0.10 mg/L
Ammonia-N EPA 350.1 28 days H,SO, to pH <2 0.02 mg/L
Nitrate + nitrite-N EPA 353.2 28 days H,SO, to pH <2 0.02 mg/L
Total phosphorus APHA 4500-P E 28 days Cool
4'C 2.0 Og/L
Ascorbic acid ,
Total organic carbon SM5310C 28 days H,SO, to pH <2 0.5 mg/L
Chlorophyll a APHA 10200 H 24 hours if pH < 7 Cool, dark
' 0.1 µg/L
3 weeks if pH >_ 7 conditions, 4
C
Biological oxygen EPA 405.1 48 hours Cool
4'C 2.0 mg/L
demand ,
cnemical oxygen EPA 410.4 28 days H,SO, to pH <2 10 mg/L
demand
Calcium EPA 200.8 6 months Cool, 4'C 0.10 mg/L
Magnesium EPA 200.8 6 months Cool, 4'C 0.10 mg/L
Sodium EPA 200.8 6 months Cool, 4'C 0.10 mg/L
Chloride EPA 325.2 28 days Cool, 4'C 1.0 mg/L
Sulfate Hach 8051 28 days Cool, 4 C 2.0 mg/L
Hardness (calculated) 6 months Cool, 4'C 1.00 mg/L
Total alkalinity EPA 310.2 14 days Cool, 4'C 1.00 mg/L
Aluminum EPA 200.8 6 months HNO, to pH < 2 50.0 pg/L
Copper EPA 200.8 6 months HNO, to pH < 2 1.0 µg/L
Mercury EPA 245.1 28 days HNO, to pH < 2 0.2 pg/L
4.2 Data Reduction and Analysis
Data reduction and analyses of environmental data were accomplished using PC SAS® software.
Standard parametric statistical descriptors, means and ranges, were calculated to summarize and
analyze the data for central tendency and dispersion. Data for the 2004 water quality study were
analyzed within and between the Project reservoirs and receiving tailwaters. In addition, long-term
temporal and spatial trends were evaluated using historical monthly water quality and chemistry data
collected at the Project during the 1999 to 2002 period. Monthly sampling was performed at Lake
Tillery and associated Pee Dee River tailwaters during 2000 and 2002 while monthly sampling was
performed at Blewett Falls Lake and associated Pee Dee River tailwaters during 1999 and 2001.
Monthly sampling was performed at the Rocky River during 2001, 2002, and 2004. The reservoir
and tailwater data were collected during both power generation and no generation flow periods over
all years, but these data provided a longer term perspective on cumulative effects of nutrient,
sediment, and other constituents on the water quality in the reservoirs and downstream tailwaters.
4-2
Section 4 Methods
Parametric statistical testing of the data was performed to evaluate hypotheses concerning spatial or
temporal differences in the data using either one-way or two-way analysis-of-variance (ANOVA).
Fisher's least significant difference (LSD) test was used to determine differences inthe mean values
if there was a significant ANOVA F-test. A paired t-test was used to determine differences in water
quality and chemistry parameters between the power generation and no power generation periods at
Stations TY113, TY1213, BF113, and BF213. Water quality samples for the no power generation
period were collected at least six hours after the last power plant generation event. Statistical tests
were only made on those parameters with the majority of values above the laboratory detection limit.
No transformations were made to the data prior to statistical tests. The General Linear Models
Procedure of the Statistical Analysis System (SAS Institute, Inc. 1990) was used to perform the
statistical tests. A Type I error rate of 5 percent (u, = 0.05) was used to judge the significance of the
tests.2
Kendall's tau B correlation coefficients were computed to examine relationships between water
quality and daily average flow (cfs) for the reservoirs, the receiving Pee Dee River tailwaters, and
the Rocky River. Water quality and lake level relationships were also examined for each reservoir.
The daily average flow data provided arelative indicator of precipitation levels and flow through the
river basin over the period of study. The total power plant discharge, including power generation
and spillage flows, was used in the correlation analysis for the reservoirs. A daily average flow was
utilized for the analysis because of the relatively short retention times of both Project reservoirs (two
to eight days). A daily average flow also better represented environmental conditions at the
tailwater stations where flow conditions were more dynamic.
The total power plant generation flow was also used for the correlation analysis of Station TY113
located below the Tillery Hydroelectric Plant. The USGS gaging station data (Rocky River at
Norwood and Pee Dee River at Rockingham, Bennettsville, and Pee Dee gages) were used to
calculate daily average flows at the Rocky River and Stations BF1B, BF3B, and BF4B located
below the Blewett Falls Hydroelectric Plant. For Station BF213 below the Blewett Falls Plant, the
daily average flow was estimated based the USGS Rockingham gage and the tributary discharge per
square mile for the intervening watershed between Stations BF 1B and BF2B. For the correlation
analysis, the daily average flow was computed for the 24-hour period when samples were collected.
Data from 2000, 2002, and 2004 were used for the correlation analysis for Lake Tillery and the
tailwater Station TY1B in Reach 1. Data from 2001, 2002, and 2004 were used for the correlation
analysis of the Rocky River. Data from 1999, 2001, and 2004 were used for the correlation analysis
for Blewett Falls Lake and the tailwater stations in Reach 2. Kendall's tau B correlation was based
on ranking of the data and permitted analysis of data with values below the laboratory detection
limit. Correlation analysis were judged significant at the P = 0.05 level.
Flow, lake level, and precipitation data were evaluated to gain insight into the hydrological and
climatological conditions affecting water quality in reservoirs and tailwaters. Power plant discharge
data (generation and spillage), lake level data, USGS gaging station river flow data, and
2 Significance used in the text from here forward refers to the probability of an error in the conclusions drawn around
a statistical finding or result. For example, if the difference between the mean score on a test for one group vs.
another group was statistically significant at the 0.05 level, it would mean that the probability of error in the
judgment that the two groups truly differ in their scores is 5 out of 100.
4-3
Section 4 Methods
precipitation data were examined for the period of 1999 to 2004 (excluding 2003 as no water quality
surveys were conducted in that year). Precipitation data were obtained from the Southeast Regional
Climate Center (Wadesboro, NC COOP Station 318964) for the 1999 to 2004 period (Southeast
Regional Climate Center 2005; State Climate Office of North Carolina 2005).
4.3 Quality Assurance and Quality Control
All water quality and chemistry data were collected in accordance with Progress Energy's Quality
Assurance/Quality Control (QA/QC) Program (Progress Energy 2004b, 2004c). In addition,
Progress Energy filed a Quality Assurance Project Plan (QAPP) with the NCDWQ during 2004
regarding its relicensing water quality studies (Progress Energy 20044). The QAPP specifies the
QA/QC framework that was followed during the conduct of these studies. Progress Energy is
certified by the NCDWQ and the South Carolina Department of Health and Environmental Control
to collect water quality and biological samples through Standard Operating Procedures. Specific
procedures for instrument calibration and water quality sampling are detailed in Progress Energy's
QA/QC Program and the QAPP.
4-4
Section 5 - Results and Discussion
5.1 Climatological and Hydrological Conditions during the Study Period
Precipitation levels and subsequent flow conditions with the Yadkin-Pee Dee River Basin are
important factors influencing the water quality in Project reservoirs and receiving tailwaters. Inflow
at the Project reservoirs is largely influenced by large-scale precipitation events within the river
basin while outflow is mainly influenced by power plant generation during average precipitation or
drought years. Large-scale precipitation events can result in rapid turnover and flushing of water
through reservoirs and tailwaters and increase the influx of solids, nutrients, and certain metals,
which in turn influence the complex interaction of physical, chemical, and biological processes.
Conversely, drought years with low precipitation levels and inflow can affect these same processes,
most notably the reduction of solids and nutrient loadings (Wetzel 2001). It should be noted that the
water quality data collected during the majority of the survey years (i.e., 1999 to 2002) occurred
under low flow or drought conditions within the river basin. Low-flow conditions tend to reduce
observable effects from nonpoint discharge sources (e.g., solids and nutrients) and magnify effects
from point source discharges (e.g., anions and cations, COD, and specific conductance) (NCDWQ
2002).
Annual precipitation levels varied widely during the study period of 1999 to 2004 (Figure 5-1).
Annual precipitation levels ranged from 69.6 cm (27.4 inches) during 2001 to 134.8 cm (53.1
inches) during 1999 (Southeastern Regional Climate Center 2005). Precipitation levels were below
the 30 year average (121.3 cm or 47.8 inches for period of 1971 to 2000) during 2000, 2001, 2002,
and 2004, but above the long-term average for 1999 (Figure 5-1). The year 2002 was an
"exceptional drought" year due to below normal rainfall totals in 2002 and preceding years
(NCDWR 2005). In 2004, the annual rainfall level was 97.6 cm (38.4 inches) and was the second
lowest year in total annual rainfall during the five years of water quality surveys (Figure 5-1).
Monthly precipitation totals were below the 30 year average during eight months in 2004 and only
exceeded the 30-year average in September due to larger precipitation events associated with
tropical storms passing through the Yadkin-Pee Dee River Basin (Figures 5-2 and 5-3).
In the Pee Dee River below the Tillery Hydroelectric Plant (Reach 1), mean annual daily stream
flows estimates ranged from to 2,514 cfs in 2001 to 13,153 cfs in 2003 (Figure 5-2). Peak stream
flows were generally greatest in later winter-early spring or the fall periods, which coincided with
large scale precipitation events within the Yadkin-Pee Dee River Basin. Estimated daily stream
flows were the lowest during the 1999 to 2002 period when compared to 2003 and 2004.
The daily mean stream flows in the Pee Dee River (Reach 2) below the Blewett Falls Hydroelectric
Plant were generally less than the historic long-term daily mean stream flow during most years
(1999, 2001, 2002, and 2004) when water quality studies were conducted in that reach (Figure 5-3).
There was aperiod of protracted drought from 1999 to 2002 in the Yadkin-Pee Dee River Basin, and
daily mean stream flows were usually less than the long-term mean stream flow during this period.
Annual mean stream flows at the USGS Rockingham gage ranged from 2,740 cfs (2001) to 14,069
cfs (2003) during the 1999 to 2004 period. Annual mean stream flow ranged from 2,772 cfs (2001)
to 12,817 cfs (2003) at the USGS Bennettsville, South Carolina gage during the same period. At the
5-1
Section 5
Results and Discussions
40
E 35
u
c 30
0
25
20
a?
a` 15
r 10
Cc
0 5
a
0
40
35
c 30
0
0 25
20
d
a` 15
s 10
r-
0 5
a
0
40
35
c 30
0
25
20
a?
0. 15
z 10
Cc
0 5
a
0
1999
2000
Annual precipitation = 69.6 cm
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Figure 5-1 Comparison of monthly precipitation from 1999 to 2001 (gray bars) with, the
30-year average (black line) and ranges of precipitation (vertical lines) for
the period 1971 to 2000.
(Data source: Wadesboro, NC COOP Station 318964)
5-2
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Section 5
Results and Discussions
40
35
30
0
41-
25
•- 20
a?
a 15
10
c0 5
C
0
H Annual precipitation = 112.5 cm
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
40 2003
s 35 Annual precipitation = 137.1 cm
c?
30
0
w 25
y
a` 1 5 I
2 10
a 5 I
I i I I i I I i I l1 1 1 I - I i I
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
40 2004
35 Annual precipitation = 97.6 cm
= 30
25
?5 T T T T T
y 10
5
Q I I I I I i I ? I i I I - I I I I 1 L I I I I 1-1 i I I
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Figure 5-1 (Continued)
5-3
Section 5
Results and Discussions
160 000
3 140,000 ... ? .... ........... ....
M 120,000
E 100,000
80,000
60,000
40,000
E_ 20,000
0
w
? n ? n ? o z o
Date o <
u 160.000 2000
3 140,000
M 120,000
E 100,000
80,000
60,000
40,000
E_ 20,000
0
W
n n o z o
o <
Date
160000 2001
3 140000
M 120000
E 100000
80000
60000
40000
E 20000
W
n n o z o
o <
Date
160.000 2002
3 140,000
M 120,000
E 100,000
80,000
60,000
40,000
E 20,000
W
0
n n o z o
o ,< o <
Date
160.000 2003
3 140,000 nmau nuuua? ouwaaeu rmw - v c?.
M 120,000
E 100,000
80,000
60,000
40,000
E_ 20,000
0
w
n n o z o
Date o <
u 160,000 2004
3 140,000 Mean Annual Estimated Flow =6,606 cfs
o 120,000
E 100,000
80,000
60,000
40,000
E 20,000
W 0 - w
n n o z o
<
Date
Figure 5-2 Estimated stream flow (cfs) of the Pee Dee River (Reach 1) below the Tillery
Hydroelectric Plant, 1999 to 2004.
5-4
Section 5
Results and Discussions
USGS Rockingham Gage No. 02129000-Pee Dee River Mile 184.7
140,000
120,000
100,000
80,000
60,000-
40,000
20,000
2 0
l6 O O m O O O O O N N N N M M M M V It V V l7
p 67 6 N O O O O O O 0 O O O O O O O O O O O O O O O
rn rn rn rn o 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 o 0 0 0
r r r r N N N N N N N N N N N N N N N N N N N N N
r V I+ O r 7 I- O - ? tom- O r 7 r` 0 r V r_ O r V r` O r
Date
140,000-
120,000-
100,000-
E
80,000-
60,000 40,00
0
20, 000
a
0 0
O O O O O O N N N N CO M M M V* C "t "t U7
M M M M O O O O O O O O O O O O O O O O O O O O O
O O M O O O O O O O O O O O O O O O O O O O O O
N N N = N N ` N N N N ` N N ` ` N N .
r V ti O r ct ti O r ct ti O r V ti O r et ti O r V h O
Date
USGS Pee Dee Gage No. 02131000-Pee Dee River Mile 100.2
w 140,000-
120,000-
0
E 100'000
80,000
m
L
v! 60,000
40,000-
20,000
0
Oi Oi 6] 61 O O O O N N N N M CO M CO <t <t .t 7 Ln
a, rn O as 0 0 0 o a o 0 0 0 0 0 0 0 0 0 o 0 o 0 0 0
rn rn rn a o 0 0 0 0 0 o 0 o 0 0 0 0 o 0 0 0 o 0 0 0
r r r r N N N N N N N N N N N N N N N N N N N N N
v r` o r v r~ o r v ? a ? v r~ o ? v n o ? v r` o
Date
Daily Mean Streamflow Long-Term Mean Daily Streamflow
Figure 5-3 Daily mean stream flow (cfs) (thin line) and historical long-term daily mean
stream flow (thick line) for period of record at USGS gaging stations located
on the Pee Dee River, North Carolina-South Carolina, below the Blewett
Falls Hydroelectric Plant.
5-5
USGS Bennettsville Gage No. 02130561-Pee Dee River Mile 147.0
Section 5 Results and Discussions
USGS Pee Dee, South Carolina gage, annual mean stream flows ranged from 3,353 cfs (2001) to
15,378 cfs (2003) during this same period. Occasional peak stream flows during these years were
the result of above average precipitation events such as tropical storm systems or other weather
systems passing through the river basin (e.g., Hurricane Floyd in 1999 and Tropical Storms Ivan and
Jeanne in September 2004). Daily mean stream flows in Reach 2 were only above the historic long-
term daily mean average during 2003 the year water quality studies were not performed at the
Project (Figure 5-3). In 2004, daily mean stream flows were less than the historic long-term mean
stream flow during the first four months of the year, but were equal to or exceeded the long-term
mean during the remainder of the year. Daily mean stream flows at the Rockingham gage ranged
from 279 to 81,400 cfs in 2004 with an annual mean stream flow of 6,984 cfs (Figure 5-3).
Lake levels were relatively stable in Lake Tillery during the years that water quality surveys were
performed (Figure 5-4). Annual mean daily lake level deviations from the normal maximum
operating pool elevation ranged from 0.3 ft in 2000 to 1.3 ft in 2004. The greatest variation in lake
levels in Lake Tillery occurred in 2001 and 2004 (Figure 5-4). There was a noticeable decline in
lake levels from September through November of 2001, due to a FERC required inspection and
testing of the tainter gates at the Tillery Development. Low precipitation and inflows during this
period resulted in this prolonged drawdown event. Lake levels also fluctuated in 2004 mainly due to
flow requirements necessary to conduct the relicensing instream flow study in downstream riverine
areas and the tropical storms that passed through the area during September. Lake levels in Lake
Tillery were relatively stable during 2000 and 2002 which were the other years that water quality
surveys were performed (Figure 5-4). In years that water quality surveys were performed, mean
daily lake level fluctuations in Lake Tillery ranged from -0.1 to -1.0 ft from normal operating
maximum pool elevation in 2000, from -0.1 to -3.4 ft in 2002, and from 0 to -7.8 ft in 2004
(Figure 5-4).
Lake levels fluctuated more in Blewett Falls Lake due to the smaller plant hydraulic capacity and
total reservoir volume and the additional accretion flows from the intervening watershed between the
two hydroelectric plants (Figure 5-4). Annual mean daily lake level deviations ranged from 0.9 ft in
2000 to 2.4 ft in 2004. Similar to Lake Tillery, the years of greatest variation in lake levels occurred
in 2001 and 2004. Additionally, there was some variation in Blewett Falls Lake levels during 1999,
particularly during the winter, spring, and early fall months. A similar decline in lake levels
occurred from September through November 2001 due to low inflows from the Tillery Hydroelectric
Plant and the intervening watershed after the Tillery tainter gate inspection and testing period. The
fluctuations in 2004 were also related to downstream flow requirements for the relicensing
environmental studies (mainly instream flow study) and loss of flashboards with high flow events
related to the tropical storms in September. In years that water quality surveys were performed,
mean daily lake level fluctuations in Blewett Falls Lake ranged from -5.6 to +2.7 ft from normal
operating maximum pool elevation in 1999; from -6.7 to +2.7 ft in 2001; and from -8.5 to +3.5 ft in
2004 (Figure 5-4).
5-6
Section 5
Results and Discussions
290
66
0
280
z
r_
Lake Tillery
Normal maximum operating elevation = 277.3 ft
c
0
> 279
a)
W
260
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
-1999 2000 2001 2002 2004 Normal Maximum Operating Elevatioi
190
68
0
> 180
z
r_
Blewett Falls Lake
0
r
> 170
W
W
160
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
-1999 2000 2001 =2002 2004 Normal Maximum Operating Elevatioi
Figure 5-4 Daily mean lake levels for Lake Tillery and Blewett Falls Lake during years
that monthly water quality surveys were conducted at the Tillery and
Blewett Falls developments, 1999 to 2004. (Note: No surveys were
conducted in 2003.)
Normal maximum operating elevation = 177.2 ft
5-7
Section 5 Results and Discussions
Total annual flows (generation and dam spillage flows) at the Tillery Development ranged from 6.55
x 105 cfs in 2001 to 3.20 x 106 in 2003 (Figure 5-5). Total annual flows were the lowest during the
2000 to 2002 period which coincided with drought conditions in the basin. The greatest total annual
flow occurred during 2003; a year that water quality studies were not conducted at the Project.
Flows in 2003 were almost twice the flows observed in 2004 - the year with the second greatest
annual flow for the 1999 to 2004 period. Very little surface spillage occurred at the dam tainter
gates during the years (2000, 2002, and 2004) that water quality surveys were conducted at Lake
Tillery. Some spillage of lake surface waters did occur in 2004 during September and December as
a result of high-flow events from tropical storms and a low pressure weather system.
At the Blewett Falls Development, the total annual flows ranged from 8.89 x 105 cfs in 2001 to 4.51
X 106 cfs in 2003 (Figure 5-6). Total annual flows from the Blewett Falls Development were also
the lowest during the period of 1999-2002 compared to the 2003 and 2004 annual flows. Similar to
flows at Tillery, the annual flow at the Blewett Falls Development during 2003 was almost twice the
annual flow observed in 2004. Spillage of surface waters occurred more frequently at the Blewett
Falls Development with spillage events occurring every year during the water quality surveys
(Figure 5-6). There was no consistent pattern of more frequent spillage events during any particular
month or season for either hydroelectric development during the 1999 to 2004 period.
5.2 Lake and Tailwater Flow Conditions During Water Quality Sampling
Trips
Power generation and flow conditions varied inthe Project reservoirs and tailwaters areas duringthe
monthly water quality sampling trips conducted from 1999 to 2004 (Figure 5-7). Generation flows
at the Tillery Development during the reservoir sampling trips ranged from 0 to 10,733 cfs during
2000, from 0 to 14,025 cfs during 2002, and from 3,786 to 13,646 cfs during 2004 (Figure 5-7).
Three of the twelve monthly sampling trips at Lake Tillery in 2000 had no power generation during
the sampling events (September, November, and December) while only two months had no power
generation during 2002. All samples were collected from Lake Tillery under power generation
conditions during 2004, as required by the RWG water quality study plan. At Station TY1B located
in the immediate tailwaters below the Tillery Development, generation flows at the time of water
quality sampling ranged from 0 to 12,396 cfs during 2000, from 0 to 9,168 cfs in 2002, and from
5,230 to 10,339 cfs in 2004 (Figure 5-7). Similar to the reservoir stations, all water quality samples
at Stations TY1B and TY12B were collected under power generation flow conditions during 2004.
Additional samples were also collected at Stations TY1B and TY12B under no power generation
conditions (i.e., power plant leakage/spillage and tributary inflow) during 2004. The flows were
estimated to be 100 cfs or less from the Tillery powerhouse and dam at the time that water quality
samples were collected at Stations TY1B and TY12B. Flow conditions at Station TY12B included
this leakage and tributary inflow (e. g., Rocky River and Brown Creek) into the 12-mile reach ofthe
river between Stations TY1B and TY12B.
5-8
Section 5
Results and Discussions
0 E,05
W 5 E+05
4 E+05
LL 3 E+05
n 2 E+05
- 1 E+05
0 E+00
Figure 5-5
6 E+05
X 5 E+05
4 E+05
LL 3 E+05
2 E+05
- 1 E+05
0 E+00
6 E+05
W 5 E+05
4 E+05
LL 3 E+05
2 E+05
- 1 E+05
0 E+00
0 E+05
W 5 E+05
4 E+05
LL 3 E+05
n 2 E+05
- 1 E+05
0 E+00
6 E+05
W 5 E+05
4 E+05
LL 3 E+05
n 2 E+05
- 1 E+05
0 E+00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
7nn7

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
6 E+05
X 5 E+05
4 E+05
LL 3 E+05
n 2 E+05
- 1 E+05
0 E+00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
2004
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
¦Generation Flow ODam spillage
Total monthly flow (generation flows and dam spillage) from the Tillery
Development during years that water quality surveys were conducted at the
Yadkin-Pee Dee River Hydroelectric Project, 1999 to 2004. (Note: No water
quality surveys were performed in 2003.)
5-9
Section 5
Results and Discussions
8 E+05
ZE+05
6 E+05
3 5 E+05
LL 4 E+05
n 3 E+05
o 2 E+05
1 E+05
0 E+00
8 E+05
ZE+05
6 E+05
3 5 E+05
LL 4 E+05
n 3 E+05
o 2 E+05
1 E+05
0 E+00
8 E+05
ZE+05
6 E+05
3 5 E+05
LL 4 E+05
n 3 E+05
o 2 E+05
1 E+05
0 E+00
8 E+05
ZE+05
° 6 E+05
3 5 E+05
LL 4 E+05
n 3 E+05
o 2 E+05
1 E+05
0 E+00
8 E+05
E+05
° 6 E+05
3 5 E+05
LL 4 E+05
n 3 E+05
o 2 E+05
1 E+05
0 E+00
E+05
B E+05
3 5E+05
LL 4E+05
n 3E+05
o 2E+05
1 E+05
0 E+00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Innq
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
M onth
8 E+05 2004
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
¦Generation Flow ODam spillage
Figure 5-6 Total monthly flow (generation flows and dam spillage) from the Blewett
Falls Development during years that water quality surveys were conducted
at the Yadkin-Pee Dee River Hydroelectric Project, 1999 to 2004. (Note: No
water quality surveys were performed in 2003.)
5-10
Section 5
Results and Discussions
Lake Tillery
16000 St ations TYB2, TYD2, TYF2, TYH2, and TYK2

12000
U
y 8000
O
a 4000
0

(D D O o C
Month
0 2000 ? 2002 ¦ 2004
Pee Dee River below Tillery Development
16000

12000

8000
3
0
a: 4000
I
A
W
1
0
. ,
m a c c
C
D 0
C ( o C
Month
1132000 ? 2002 ¦ 2004
Blewett Falls Lake
16000 Stations BF132 BFF2 and BFI-12

0 12000
-
»
cs
8000

O
LL 4000
ff
m
0
L?

` N v c c CO o
m Cr 0
cQ o -
<
Month
01999 ? 2001 ¦ 2004
Pee Dee River below Blewett Falls Development
16000 Station BF1B
12000
3 8000
0
UL 4000
0 IIHI
C- 7 ? C C- > to 0 z 0
C (D 0 o m
Z5 (a _0 < 0
Month
1 01999 ? 2001 ¦ 2004
Figure 5-7 Total generation flows (cfs) at the time that water quality sampling was
conducted at the Tillery and Blewett Falls lakes and tailwaters, 1999 to 2004.
(Note: Samples were collected at Tillery Development during 2000, 2002,
and 2004 and at Blelvett Falls Development during 1999, 2001, and 2004.)
5-11
Section 5 Results and Discussions
Generation flows at the Blewett Falls Development during the reservoir sampling trips ranged from
0 to 7,312 cfs during 1999, from 0 to 7,356 during 2001, and from 1,224 to 7,600 cfs during 2004
(Figure 5-7). Six of the 12 monthly sampling trips at Blewett Falls Lake were conducted under no
power generation conditions during 1999 while nine of the 12 monthly sampling trips were
conducted under no power generation conditions during 2001. All reservoir water quality samples
were collected under power generation conditions during 2004, per study plan requirements.
At Station BF1B located in the Blewett Falls tailwaters, power generation flows ranged from 1,092
to 13,194 cfs in 1999, from 0 to 7,296 cfs in 2001, and from 3,230 to 7,459 cfs in 2004 during
sampling. All water quality samples were collected under power generation flow conditions during
1999 and 2004 while 3 of the 12 samples collected in 2001 were collected during no power
generation flows (Figure 5-7). All water quality samples were collected under power generation
flows at Stations BF1B, BF213, BF313, and BF413 during 2004, per study plan requirements. In
addition, water quality samples were also collected under no power generation flow conditions atthe
tailwater Stations BF1B and BF213 during 2004. Flows atthe USGS Rockingham gage (USGS Gage
No. 02129000) ranged from 209 to 882 cfs at the time that Stations BF 1 B and BF213 were sampled
under the no power generation low flow conditions.
5.3 Water Quality Results
The water quality raw data (i.e., temperature, DO, specific conductance, pH, and Secchi disk
transparency depth) collected at both Project reservoirs and the receiving Pee Dee River tailwaters of
each hydroelectric development are presented in Appendices A and B. The water chemistry data are
presented in Appendices C and D and includes alkalinity, hardness, turbidity, solids constituents
(total solids, total dissolved solids, and total suspended solids), nutrient concentrations (nitrogen and
phosphorus), total organic carbon (TOC), biological oxygen demand, chemical oxygen demand, and
selected metal concentrations (aluminum, copper, and mercury).
5.3.1 Lake Tillery
5.3.1.1 Spatial and Temporal Trends in Lake Tillery Water Chemistry
Lake Tillery was characterized as amesotrophic reservoir with moderate nutrient concentrations and
solids concentrations, moderate water clarity, and weakly buffered with low to moderate anion and
cation concentrations (i.e., chloride, sulfate, sodium, magnesium concentrations) (Tables 5-1 and
5-2; Appendix C). The short hydraulic retention time of the reservoir (average of 8.3 days), coupled
with the "filtering effect" of the four upstream reservoirs (i.e., High Rock, Lake Tuckertown
Reservoir, Narrows Reservoir, and Falls Lake), influenced the nutrient and solids concentrations,
turbidity values, and the trophic status of the reservoir. A NCDWQ assessment of the lake in 1999
rated the reservoir as mesotrophic, owing to its relatively short hydraulic retention time, water clarity
exceeding one meter in depth, and low algal productivity relative to moderate amounts of nutrients
(NCDWQ 2000). The NCDWQ concluded that Lake Tillery was supporting its designated uses at
the time of the survey in 1999. The NCDWQ also concluded the lake seemed to be supporting its
5-12
Section 5
Results and Discussions
Table 5-1 Means, ranges (in parentheses), and spatial trends of selected water
chemistry parameters from the surface and bottom waters at Stations TY132,
TYF2, and TYK2 of Lake Tillery during 2004.
Station
Parameter'2 TYB2 TYB2 TY12 TYF2 TYK2
Surface Bottom Surface Bottom Surface
Solids (mg/L)
Temperature (EC) 18.6 15.9 18.4 15.4 16.8
(6.2-30.6) (5.9-25.3) (6.5-31.1) (5.7-25.8) (5.5-26.9)
Dissolved oxygen (mg/L) 10.2 6.3 10.5 7.6 9.0
(7.0-13.8) (0.1-11.7) (6.5-14.4) (0.9-11.7) (4.8-12.5)
Total solids 75 82 75 84 76
(51-123) (64-110) (58-111) (66-105) (56-110)
Total dissolved 70
(51-103) 70
(56-109) 66
(51-103) 70
(52-111) 69
(54-112)
Total suspended

Turbidity (NTU) 3.7
(2.4-5.5)
5.6
(0.2-12) 9.5
(19-48)
19
(2.8-44) 4.4
(2.1-11)
8.4
(0.7-40) 8.4
(3.8-17)
21
(5.2-91) 4.0
(1.8-10)
8.0
(0.4-40)
Seechi disk transparency
depth (M)
Nutrients (M&L)
Total nitrogen 0.56 0.60 0.61 0.57 0.61
(0.34-1.32) (0.27-1.37) (0.33-1.84) (0.36-1.09) (0.28-1.69)
Ammonia-N 0.04 0.08 0.08 0.09 0.11
(< 0.02-0.08) (< 0.02-0.23) (< 0.02-0.48) (0.02-0.20) (< 0.02-0.74)
Nitrate +nitrite -N 0.43' 0.53 0.47' 0.56 0.58a
(<0.02-0.74) (0.21-0.75) (<0.02-0.80) (0.21-0.78) (0.28-0.80)
Total phosphorus 0.032' 0.050 0.039a 0.050 0.036'
(0.018-0.047) (0.011-0.158) (0.023-0.065) (0.022-0.109) (0.018-0.072)
Total organic carbon 2.8 2.9 2.9 2.8 2.8
(mg/L) (2.0-4.5) (2.2-5.2) (2.0-5.3)
' (2.1-5.3) (2.0-4.9)
'
Chlorophyll a ((Dg/L) 10.3a
(2.4-28) NA' 8.5
(2.4-18) NA 4.5
(1.5-9.0)
Chemical oxygen demand <10 < 10 <10 <10 <10
(mg/L) (< 10-11) (< 10-16) (< 10-14) (< 10-13) (< 10-12)
Biological oxygen < 2 < 2 < 2 < 2 < 2
demand (mg,=L) (< 2-2.3) (< 2-2.7) (< 2-2.1) (< 2-2.1)
Calcium 4.9 4.9 4.9 5.1 5.0
(2.2-7.6) (2.0-5.8) (2.3-5.8) (3.5-5.8) (3.3-6.2)
Magnesium 2.3 2.1 2.1 2.1 2.0
(< 1.0-4.7) (< 1.0-3.0) (< 1.0-3.0) (< 1.0-3.0) (< 1.0-3.0)
Sodium 6.3 6.0 6.1 6.2 6.3
(4.6-8.2) (4.3-8.3) (4.5-7.6) (4.4-7.6) (4.5-7.7)
Chloride 8.7 9.1 8.7 8.8 9.0
(6.2-13) (6.4-12) (6.1-12) (6.2-12) (5.9-12)
Sulfate 6.0 5.4 7.1 5.7 6.3
(5.2-9.7) (3.0-6.4) (4.4-19) (4.9-7.2) (5.2-9.1)
Specific conductance 90 94 91 93 92
((DS/cm) (78-98) (75-108) (74-99) (74-105) (76-101)
Hardness (calculated)4 21 21 21 21 20
(5.4-38) (5.1-26) (5.7-25) (8.8-24) (8.3-25)
Total alkalinity4 21 21 22 20 20
(16-26) (17-28) (15-51) (15-28) (16-26)
H
PH 8.0 7.0 7.9 7.0 7.2
(7.1-8.8) (63-7.7) (68-91) (6.5-7.5) (6.6-7 7)
5-13
Section 5
Results and Discussions
Station
Parameterla TYB2 TYB2 TYF2 TYF2 TYK2
Surface Bottom Surface Bottom Surface
Trace elements (d)?/L)
Aluminum 130 666 181 371 200
(< 50-288) (59-4,780) (< 50-564) (75-778) (60-696)
1.8 2.4 1.8 2.1 1.9
Copper (< 2.0-11) (< 2.0-7.5) (< 2.0-2.7) (< 2.0-4.0) (<2.0-3.8)
Mercury < 0.2 < 0.2 < 0.2 0.2 < 0.2
1 Sample size (n) equaled 12. Less than values (<) indicate the Lower Reporting Limit (LRL) for the parameter. The
LRL is a statistically determined limit beyond which chemical concentrations cannot be reliably reported. Statistical
analyses were utilized only when mean concentrations were above the analytical lower reporting limits. Missing
range values indicate that all measured values were less than the LRL for that parameter.
2 Statistical analyses were utilized only when the majority of parameter concentrations were above the analytical
lower reporting limits. Fisher's protected least significant difference (LSD) test was applied only if the overall
ANOVA F test for the treatment effect was significant. Means followed by different superscripts were significantly
different (P< 0.05). Data were rounded to conform to laboratory reporting limit requirements. Such rounding may
obscure mean differences.
3 NA means not applicable because no Secchi disk transparency depth or chlorophyll a data were collected from
bottom waters.
Total alkalinity units are mg/L as CaCO3 and hardness is calculated as mg equivalents CaC03/L.
5-14
Section 5 Results and Discussions
Table 5-2 Comparison of spatial trends of annual means for selected water chemistry
parameters from the surface waters of Lake Tillery (Stations TYB2, TYF2,
and TYK2) for 2000, 2002, and 2004.
Parameterl' x Station
TYB2 TY12 TYK2
Temperature (BC) 19.1 18.8 16.9
Dissolved oxygen (mg/L) 9.8a 10.3a 8.8 b
72 77 79
Total dissolved 72 74 76
Total suspended 3.0 4.0 3.3
Turbidity (NTT-D 4.7 7.8 6.6
Secchi disk transparency (m) 1.6 1.4 1.7
Nutrients mm/L)
Ammonia-N 0.03 0.05 0.07
Nitrate + nitrite-N 0.31' 0.36' 0.48a
Total nitrogen 0.50 0.53 0.50
Total phosphorus 0.028b 0.037a 0.034ab
Total organic carbon (mg/L) 3.2 3.5 3.1
Chemical oxygen demand 12 12 11
Chlorophyll a 8.8a 9.1a 4.1b
Ions (mg1L)
Calcium 5.1 5.2 53
Chloride 11 11 11
Magnesium 2.3 2.3 2.2
Sodium 9.1 9.0 9.5
Sulfate 9.0 9.4 9.4
Total alkalinity (mg/L as CaCO3) 24 24 23
Hardness (mg equivalents CaCO3/L) 22 22 22
Specific conductance ((DS/cm) 100 101 101
pH 7.7a 7.82 7.3'
Aluminum 124 170 152
Copper 1.7 1.9 1.6
1 Sample size = 36 for all parameters except for total organic carbon (n = 35 at Station TYK2), turbidity (n = 32 at
Station TYD2; n = 33 at Station TYH2; and n = 35 at Station TYK2) and Secchi disk transparency (n = 33 at
Stations TYD2 and TYH2 and n = 25 at Station TYK2).
2 Statistical analyses were utilized only when the majority of parameter concentrations were above the analytical
lower reporting limits. Fisher's protected least significant difference (LSD) test was applied only if the overall
ANOVA F test for the treatment effect was significant. Means followed by different superscripts were significantly
different (T 0.05). Data were rounded to conform to laboratory reporting limit requirements. Such rounding may
obscure mean differences.
5-15
Section 5 Results and Discussions
designated uses during the 2002 basinwide assessment. Long-term data collected by the NCDWQ
and Progress Energy indicated the water quality conditions in the lake have not appreciably changed
since the 1980s (CP&L 1987, 1993; North Carolina Department of Natural and Economic
Resources, Division of Environmental Management [NCDEM] 1983, 1989, 1992a, 1992b; NCDWQ
1998). Lake Tillery did not exhibit any pronounced spatial gradient in water chemistry parameters
within reservoir during 2004 or during the survey period of 2000, 2002, and 2004 (Tables 5-land
5-2). Lake Tillery has a fairly short average hydraulic retention time, which influenced spatial
characteristics in water chemistry parameters and algal productivity, depending upon inflow,
outflow, and relative precipitation amounts within a given year. Most measured water chemistry
parameters were fairly uniform throughoutthe lake surface waters with few significant longitudinal
differences (i.e., upstream to downstream) observed in mean values among Stations TY132, TYF2,
and TYK2 (Tables 5-1 and 5-2). The only exceptions were significantly greater nitrate + nitrite-
nitrogen andtotal phosphorus concentrations in the middle or upper portions of the lake comparedto
the lower lake near the dam (Tables 5-1 and 5-2). Significant increases in these two parameters may
have reflected inputs from either inflow from the Falls Development and/or the Uwharrie River.
Temporal analysis of water chemistry parameters during 2000, 2002, and 2004 indicated significant
differences among years in concentrations of total dissolved solids, total nitrogen, nitrate + nitrite-
nitrogen, total organic carbon, chloride, sodium, sulfate, total alkalinity, and chemical oxygen
demand (COD) (Table 5-3). Generally, concentrations of these parameters were greater in the lower
flow, drought years of 2000 and 2002 when compared to 2004, a year with greater outflow levels
(Figures 5-2 and 5-5). Exceptions to this temporal trend were significantly greater total nitrogen and
nitrate+nitrite-nitrogen concentrations in 2004. Lower inflow and outflow, coupled with evaporative
processes, during the lower flow drought years would increase dissolved solids, nutrients, and anion
and cation concentrations. Higher COD values were likely the result of greater organic
decomposition with increased hydraulic retention time during the lower flow years.
Anion and cation concentrations in reservoir surface waters were in the low to moderate range
during 2004 and ranked by ion type, respectively, as follows: chloride > sulfate > sodium and
bicarbonate (alkalinity) > calcium > magnesium (Tables 5-1 and 5-3). This ranking was similar in
2000 and 2002 with the exception of sulfate and chloride rankings in 2002 (Table 5-3).
Concentrations of chloride, sulfate, sodium, and total alkalinity were significantly greater during the
lower flow, drought years of 2000 and 2002 when compared to concentrations in 2004 (Table 5-3).
Calcium and magnesium exhibited no significant temporal trends during the three survey years.
Occasional pulses of nutrients, aluminum, solids, and turbidity with lowered Secchi disk
transparencies were observed in 2004 as well as other years (Appendix C, Tables C-1 to C-3). These
pulses were related to large precipitation events in the river basin and subsequent increased inflows
into the reservoir (e.g., January-February 2000, November-December 2002, and September-October
2004). For example, in September 2004, passage of tropical storms resulted in above normal
precipitation and high flow events. There were observed increases in chloride, total nitrogen,
ammonia-nitrogen, total phosphorus, total organic carbon, turbidity, total dissolved solids, and
aluminum during September and October (Appendix C, Table C-3).
5-16
Section 5 Results and Discussions
Table 5-3 Comparison of temporal trends of annual means for selected water
chemistry parameters from the surface waters of Lake Tillery (Stations
TYB2, TYF2, and TYH2) for 2000, 2002, and 2004.
Parameter'' z Year
2000 2002 2004
Temperature CC) 18.7 18.2 17.9
Dissolved oxygen (mg/L) 9.7 9.3 9.9
Solids (M&L)
Total solids 74 79 76
Total dissolved 73ab 802 68b
Total suspended 3.1 3.1 4.0
Turbidity (NTq 7.0 6.0 7.3
Secchi disk transparency (m) 1.7a 1.6 a 1.2'
Nutrients (M&L)
Ainm onia-N 0.04 0.04 0.08
Nitrate + nitrite-N 0.32' 0.34' 0.49a
Total nitrogen 0.36' 0.58a 0.59a
Total phosphorus 0.034 0.030 0.035
Total organic carbon (mg/L) 3.5a 3.5a 2.8b
Chemical oxygen demand 14a 14a 6.2b
Chlorophyll a 7.6 6.6 7.8
Ions (mg1L)
Calcium 5.1 5.5 4.9
Chloride 12a 12a 8.8 b
Magnesium 2.3 2.4 2.1
Sodium l 0a 11 a 6.3b
Sulfate 8.5b 13a 6.4`
Total alkalinity (mg/L as CaCO3) 25a 24a 21'
Hardness (mg equivalents CaCO3/L) 22 24 21
Specific conductance ((DS/cm) 101b l l la 91°
pH 7.5 7.6 7.7
Aluminum 135 141 170
Copper 1.6 1.8 1.8
1 Sample size = 60 for all parameters except for turbidity (n = 55 for 2000; n = 59 for 2002; and n = 59 for 2004) and
Secchi disk transparency (n = 58 for 2002 and n = 45 for 2004).
2 Statistical analyses were utilized only when the majority of parameter concentrations were above the analytical
lower reporting limits. Fisher's protected least significant difference (LSD) test was applied only if the overall
ANOVA F test for the treatment effect was significant. Means followed by different superscripts were significantly
different (P - 0.05). Data were rounded to conform to laboratory reporting limit requirements. Such rounding may
obscure mean differences.
5-17
Section 5 Results and Discussions
A few differences were noted in surface versus bottom concentrations of water chemistry parameters
during 2004 and for the three-year monitoring period of 2000, 2002, and 2004 (Tables 5-4 and 5-5).
There were significantly greater concentrations of total suspended solids, ammonia-nitrogen, and
total phosphorus and greater turbidity values in bottom waters at Stations TYB2 and TYF2 for the
three-year period (Table 5-5). The total solids concentration was also greater in the bottom waters at
Station TYB2 during this period. Bottom values for these parameters ranged from 1.1 to 2.7 times
greater than the surface values. Significantly greater concentrations of ammorria-nitrogen in bottom
waters reflected the seasonal changes in anoxic conditions and microbial activity. Total phosphorus
and total suspended solids concentrations were interrelated as most phosphorus fractions are
particulate in nature. The turbidity and solids differences in bottom waters likely reflected inflows
from the Yadkin and Uwharrie Rivers and associated seasonal density gradients within the reservoir.
Turbidity levels in the surface and bottom waters of Lake Tillery occasionally exceeded the North
Carolina water quality standard of 25 NTU for reservoirs in all three survey years (Appendix C).
The percentage of turbidity samples exceeding the North Carolina water quality standard ranged
from 3 to 10 percent during the three years of water quality surveys and were most frequently
observed in the bottom waters at Station TYB2. Peak turbidity values ranged from 27 to 90 NTU
during this period.
The trace metals copper and mercury were generally low in the reservoir during 2004 and
during the 2000, 2002, and 2004 period (Tables 5-1 to 5-3). Mercury values were less than the
laboratory reporting limit of 0.2 gg/L in 94 percent of surface and bottom water samples collected
during the three years. Mercury values greater than the laboratory reporting limit were observed at
Stations TYB2, TYF2, TYK2 during 2000 and ranged from 0.20 to 0.90 gg/L. These detectable
values were greater than the North Carolina water quality standard of 0.012 gg/L (NCDWQ 2004b).
Copper concentrations ranged from < 1.0 to 7.5 gg/L during the three years of water quality surveys
(Appendix C). Only one copper value (Station TYB2, bottom water sample, 2004) was greater than
the North Carolina Action Leve13 (NCDWQ 2004b). Aluminum levels were highly variable and
ranged from < 50 to 4,780 mg/L during 2000, 2002, and 2004 (Appendix C). Aluminum is bound to
clay soil particles, and there is usually apositive relationship between precipitation events, sediment
levels, and aluminum loading in Piedmont reservoir systems (NCDWQ 2002).
Chlorophyll a concentrations, an indirect indicator of algal productivity, were in the low to moderate
range on Lake Tillery during 2004 as well as during 2000 and 2002 (Tables 5-1 to 5-3 and
Figure 5-8). The reservoir has a relatively deep photic zone (mean Secchi disk depths > 1 m) so
light penetration was typically not a limiting factor in phytoplankton production. There were no
significant temporal differences in chlorophyll a concentrations among the three years (Table 5-3).
Spatially, chlorophyll a mean concentrations were significantly greater at the lower and mid lake
Stations TYB2 and TYF2 compared to the upper lake Station TYK2 (Tables 5-1 and 5-2 and
Figure 5-8). This spatial pattern may have reflected the longitudinal spatial differences in total
phosphorus and nitrate + nitrite-nitrogen concentrations and nutrient uptake and assimilation by
phytoplankton as water flowed through the lake. Furthermore, Station K2 was located just
3 The Action Level refers to a waterborne concentration of an analyte that if exceeded may require further regulatory
action by the responsible water quality agency (NCDWQ 2004b).
5-18
Section 5 Results and Discussions
Table 5-4 Paired t-test results of differences between surface and bottom waters for
selected water chemistry parameters in Lake Tillery during 2004.
Parameter "7 Station
TYB2 TY12
Solids (Mg/L)
Total solids n.s. n.s.
Total dissolved n.s. n.s.

Total suspended
n.s. x:=x

bottom (8.4) > surface (4.4)
Turbidity (NTTJ) bottom (19) > surface (5.6) n.s.
Nutrients (mg/L)
Total nitrogen n.s. n.s.
Ammonia-N bottom (0.08) > surface (0.04) n.s.
Nitrate + nitrite-N n.s. n.s.
Total phosphorus n.s. n.s.
Total organic carbon (mg/L) n.s. n.s.
Ions (MzIL)
Calcium n. s. n. s
Magnesium n. s. n. s.
Sodium n. s. n. s.
Chloride n. s. n. s.
Sulfate n.s. n.s.
Hardness (calculated) n.s. n.s.
Total alkalinity n.s. n.s.
Trace elements (ftE)

Aluminum
n.s. .x
bottom (371) > surface (181)
Copper n. s. n. s.
1 A paired t-test was applied to determine differences between surface and bottom concentrations of each parameter
when applicable. P values: n.s. = not significant (P > 0.05), * = 0.01 < P -- 005; k'k = 0.001 < P < 0.01.
2 Mean values are given in parenthesis for parameters with significant t-tests only.
5-19
Section 5 Results and Discussions
Table 5-5 Paired t-test results of differences between surface and bottom waters for
selected water chemistry parameters in Lake Tillery during 2000, 2002, and
2004.
Station
Parameters? TYB2 TYF2
Total solids
Total dissolved
Total suspended
Turbidity (NTLD
x:
bottom (80) > surface (72)
n.s.
x:
bottom (6.6) > surface (3.0)
bottom (15) > surface
n. s.
n.s.
bottom (7.3) > surface (4.0)
:x
bottom (16) > surface
Total nitrogen
Ammonia-N
Nitrate + nitrite-N
Total phosphorus
Total organic carbon (mg/L)
Chemical oxygen demand
n.s.
x=
bottom (0.08) > surface (0.03)
n.s.
bottom (0.046) > surface (0.028)
n.s.
n.s.
n. s.
=x
bottom (0.10) > surface (0.05)
n.s.
bottom (0.046) > surface (0.037)
n.s.
n.s.
Ions (mg/L)
Calcium n. s. n. s
Magnesium n. s. n. s.
Sodium n. s. n. s.
Chloride n. s. n. s.
Sulfate n.s. n.s.
Hardness (calculated) n.s. n.s.
Total alkalinity n.s. n.s.
Trace elements (d)g/L)

Aluminum
n.s. =x
bottom (438)> surface (170)
Copper n. s. n. s.
1 A paired t-test was applied to determine differences between surface and bottom concentrations of each parameter
when applicable. P values: n.s. = not significant (P> 0.05), *=0.01 <P<0.05, ** =0.001 <P<0.01, and*** =P
_< 0.001.
2 Mean values are given in parenthesis for parameters with significant t-tests only.
5-20
Section 5
Results and Discussions
60
= 50
M 40
r = u.u4
TYB2a" TYF2a TYK2"
3. 30
0 20
10
L) 0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Station TYB2 -& Station TYF2 Station TYK2
60
= 50
40
30
0 20
2 10
U 0
?.no ....O.Y -
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Station TYB2 -Station TYF2 Station TYK2
60
50
40
>. 30
0 20
0 10
L) 0
nano ...m.y - Vv
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Station TYB2 -Station TYF2 *Station TYK2
Figure 5-8 Temporal and spatial trends in chlorophyll a concentrations in Lake Tillery
during 2000, 2002, and 2004. (Note: Statistical results among lake stations
are shown within each graph with different letter superscripts indicating
significantly different mean values.)
5-21
Section 5 Results and Discussions
downstream of Falls Lake and was in a transitional zone between semi-lotic and lentic
environmental conditions which would affect nutrient assimilation and phytoplankton production.
Peak chlorophyll a concentrations were observed in the lower and mid lake areas in either the spring
or summer months of each year which usually coincided with pH values of eight to nine units
(Appendix A and Figure 5-8). Chlorophyll a concentrations throughout Lake Tillery during all three
survey years were also less than the North Carolina water quality standard of 40 gg/L (Tables 5-1 to
5-3 and Figure 5-8).
5.3.1.2 Relationships between Water Quality and Lake Level and Flow in Lake Tillery
Kendall's tau b correlation analysis showed few significant correlation associations between daily
average lake level and surface water quality parameters in Lake Tillery (Table 5-6). Weak negative
correlations occurred between lake level and total nitrogen while weak positive correlations occurred
with calcium, chloride, and aluminum. The lack of correlations between lake level and water quality
parameters was not unexpected given that Lake Tillery has a relatively stable reservoir level and
usually deviates less than 2 ft under most circumstances (Figure 5-4 and Progress Energy 2003).
There were more significant correlations between daily average flow and surface water quality
parameters in Lake Tillery (Table 5-7). Water temperature, specific conductance, and
concentrations of sodium, chloride, sulfate, total alkalinity, and chlorophyll a had weak to
moderately significant negative correlations with daily average flow. Significant positive
correlations with daily average flow were observed for DO, total solids, total suspended solids,
turbidity, ammonia-nitrogen, nitrate + nitrite-nitrogen, total phosphorus, calcium, aluminum, and
copper (Table 5-7). No significant correlations were observed between flow and pH, COD, and
concentrations of total dissolved solids, total nitrogen, total organic carbon, and magnesium. The
daily average flow was a general indicator of reservoir retention time and inflow as the Tillery
Hydroelectric Plant usually operated with inflows from the Falls Development located upstream.
The significant negative correlations indicated a reservoir "flushing" effect with a shorter retention
time as these parameters decreased with increased flow. Conversely, the positive correlations likely
indicated increased inputs of those specific water quality parameters with flow. It should be noted
that these correlation analyses included two extremely dry years (2000 and 2002) and one year with
near normal precipitation levels (2004). No water quality surveys were conducted in 2003, a "wet"
year with above average precipitation and flows (Figures 5-1 and 5-2). Generally, flow through the
Yadkin-Pee Dee River Basin is largely influenced by regional precipitation events and subsequent
inflows. During dry periods, power plant operations influence daily average flows to a greater
extent than tributary inflow.
5.3.1.3 Spatial and Temporal Trends in Temperature, DO, PH, Specific Conductance, Secchi
Disk Transparency, and Turbidity in Lake Tillery Surface Waters
Mean temperatures in surface waters (0.2 m depth) throughout the reservoir ranged from 5.5' to
31.1'C during 2004 while DO concentrations ranged from 4.8 to 14.5 mg/L (Table 5-8). Means and
ranges of water temperature and DO concentrations during 2004 were similarto values observed in
2000 and 2002 which were drier, lower flow years. There were no statistical differences among
5-22
Section 5 Results and Discussions
Table 5-6 Kendall's tau b correlation coefficients of daily average lake level versus
water quality parameters in the surface waters of Lake Tillery (Stations
TYB2, TYF2, and TYK2) for the years 2000, 2002, and 2004.
Parameter' Kendall's Tau b Correlation Coefficient
Temperature n. s.
Dissolved oxygen n. s.
pH n. s.
Specific conductance n. s.
Total solids n. s.
Total dissolved solids n. s.
Total suspended solids n. s.
Turbidity n. s.
Total nitrogen -0.1677
Ammonia-N n.s
Nitrate + nitrite-N n.s.
Total phosphorus n. s.
Total organic carbon n. s.
Chlorophyll a n. s.
Total alkalinity n. s.
Chemical oxygen demand n. s.
Calcium 0.0533
*
Magnesium n. s.
Sodium n. s.
Chloride 0.2492
***
Sulfate n. s.
Aluminum 0.0512
*
Copper n. s.
1 Pvalues: n.s.=not significant(P>0.05),*=0.01<P<0.05; **=0.001<P<0.01,and***=P<0.001
5-23
Section 5 Results and Discussions
Table 5-7 Kendall's tau b correlation coefficients of daily average fl ow versus water
quality parameters in the surface wate rs of Lake Tillery ( Stations TYB2,
TYF2, and TYK2), the Pee Dee River tailwaters below the Tillery
Hydroelectric Plant (S tation TY113), an d the Rocky River (Station RR) for
the years 2000, 2002, and 2004.
Parameteri'2 Location
La ke Tillery Tillery Tailwaters Rocky River
Temperature -0.3914 -0.3956 -0.3095

Dissolved oxygen 0.2117
** 0.2639
*
n. s.

pH n. s. n. s. n. s.
Specific conductance -0.5074 -0.5304 -0.5806

Total solids 0.1423 n s -0.4549
* ***
Total dissolved solids n. s. n. s. 0.5269
***
Total suspended solids 0.4521 0.3669 0.3909

Turbidity 0.4707 0.5168 0.5089

Total nitrogen n.s. n. s. n. s.
Ammonia-N 0.3076
n. s.
n. s.
Nitrate + nitrite-N 0.3969 0.4552 n
s

***
*** .
.
Total phosphorus 0.465 0.3277 -0.4656

Total organic carbon n. s. n.s. -0.2370
Chlorophyll a 0.1647 NA NA

Total alkalinity -0.2497
*** -0.3605
** -0.5973
***

Chemical oxygen demand n. s. n. s. n. s.
Calcium 0.1563
n. s.
n. s.
Magnesium n. s. n. s. -0.2672
Sodium -0.3064 -0.2354 -0.5832
*** * ***

Chloride -0.1876
n
s -0.5067
** .
.
***
Sulfate -0.1800 n s -0.4387
** ***
Aluminum 0.4939 0.4800 0.2908
*** *** *
Copper 0.3157
*** 0.3603
** n. s.

1 Correlation analysis for Rocky River was for the years of 2001, 2002, and 2004.
2 Pvalues: n.s.=not significant(P>0.05), *=0.01<P<0.05; ** -0.001 <P<0.01, and -P< 0.001.
5-24
Section 5
Results and Discussions
Table 5-8
Parameter' TYB2 T1D2 TYF2 TYM TYK2
Temperature (EC) 19.73 19.7a 19.4a 19 Oa 17.1°
(6.6-31.3) (6.6-31.5) (4.9-31.5) (5.4-32.9) (5.6-26.6)
9
86 10
4ab 10
83 2ab
10 8 5e
Dissolved oxygen (mg/L) .
(5.1-15.3) .
(5.3-15.4) .
(6.8-15.2) .
(7.1-13.0) (5.8-11.8)
Specific conductance ((DS/cm) 101 101 101 101 101
(78-123) (77-124) (66-124) (70-130) (72-131)
7.4b 7.7a 7.8a 7.8a 7.4b
pH (6.6-9.0) (6.9-9.0) (6.2-9.0) (7.0-8.5) (7.0-7.8)
Turbidity (NTT_)) 2 5.1 5.5 8.5 9.8 7.4
(1.7-8.7) (2.2-10) (2.2-46) (2.8-33) (2.8-20)
Secchi disk depth (m) 1.9 1.8 1.6 1.5 1.9
(1.0-2.7) (1.0-3.0) (0.4-2.4) (0.5-3.0) (0.7-3.0)
2002
Temperature (EC) 19.03 19.2a 18.53 18.3 16.9e
(8.4-29.5) (8.9-30.0) (7.6-30.1) (7.4-29.8) (7.3-26.6)
Dissolved oxygen (mg/L) 9.5a 9.6a 9.6a 9.9a 8 76
(6.4-12.4) (6.7-12.6) (7.0-11.5) (7.2-11.3) (5.0-11.6)
Specific conductance ((DS/cm) 110
(70-136) 110
(72-143) 111
(72-144) 111
(71-141) 112
(73-150)
pH 7.7a 7.7a 7.7a 7.6a 7.3b
(7.0-9.2) (7.1-8.7) (7.0-8.7) (7.1-8.9) (6.9-7.5)
Turbidity tNTg3 3.5 5.3 6.4 5.4 4.3
(0.3-18) (1.7-15.0) (1.8-30) (1.2-13) (1.0-12)
Secchi disk depth (m)3 1.8 1.7 1.5 1.4 1.6
(0.9-2.8) (1.0-3.0) (0.7-2.5) (1.0-2.3) (1.0-2.3)
Temperature (EC) 18.6a° 18.7a 18.4a° 17.8° 16.8°
(6.2-30.6) (62-31.1) (6.5-31.1) (6.1-29.9) (5.5-26.9)
Dissolved oxygen (mg/L) 10.2a 10.2a 10.5a 10.1a 9.06
(7.0-13.8) (6.4-14.1) (6.5-14.4) (6.3-14.5) (4.8-12.5)
Specific conductance ((DS/cm) 90 87 91
(78-98) (52-99) (74-99) 92
(75-100) 92
(76-101)
H
p 8. Oa 7.8a 7.9a 7.5 7.2
(7.1-8.8) (6.8-9.0) (6.8-9.1) (6.7-8.4) (6.6-7.7)
Turbidity (NTLD 5.6 5.2 8.4 7.5 8.0
(0.2-12) (0.5-16.0) (0.7-40) (0.9-33) (0.4-40)
Secchi disk depth (m)4 1.2 1.2 1.2 1.1 1.8
(0.2-1.7) (0.1-1.8) (0.1-1.9) (0.1-1.7) (1.7-1.9)
1 Fisher's protected least significant difference (LSD) test was applied only if the overall ANOVA F test for the
treatment was significant. Means follow ed by different superscripts were significantl y different (P < 0 .05). Data
were rounded to conform to significant digit requirements. Rounding may obscure m ean differences.
2 Sample size was unequal for stations (n = 12 for Stations TYB2, TYF2, and TYK2; n = 10 for Station D2; and n = 9
for Station TYH2).
3 Sample size was unequal for stations (n = 12 for all parameters except for Station TYK2 where n = 10 for Secchi
disk transparency and n = 11 for turbidity).
4 Sample size was unequal for stations (n = 12 for Stations TYB2 and TYF2; n = 9 for Stations TYD2 and TYH2; and
n = 3 for Station TYK2).
Means, ranges (in parentheses), and spatial trends of water quality
parameters from the surface waters (0.2 m depth) at stations within Lake
TillerT during 2000, 2002, and 2004.
5-25
Section 5 Results and Discussions
annual means of surface temperature and DO among the three survey years of 2000, 2002, and 2004
(Table 5-3). Although not statistically significant, temperatures appeared to be slightly warmer
during the low flow years of 2000 and 2002 (Tables 5-3 and 5-8). There were significant
longitudinal differences in surface temperatures and DO concentrations during each survey year
(Table 5-8). Temperature and DO concentrations increased from the reservoir headwaters (Station
TYK2) to the mid and lower reservoir areas (Stations TY132, TYD2, TYF2, and TYH2) and likely
reflected the inflows from the upstream Falls Development during the stratification period. Falls
Lake receives inflows from Narrows Reservoir which has a deep hypolimnion with cooler
temperatures and lower DO concentrations during the stratification period (APGI 2000). The
average retention time of Falls Lake is very short (less than one day) so water quality inflow from
Falls Lake into Lake Tillery headwaters would be expected to be similar to the water quality of the
upstream releases from Narrows Reservoir. It is likely that inflows from the Uwharrie River
increased temperature and DO during the stratification period as there were increases in both water
quality parameters between Stations TYK2 and TYH2 during this summertime period (Appendix A,
Tables A-1 to A-3). Dissolved oxygen concentrations in surface waters of Lake Tillery were above
the North Carolina instantaneous (4.0 mg/L) and daily average (5.0 mg/L) water quality standards
during 2000, 2002, and 2004. However, DO concentrations slightly less than 5.0 mg/L were
observed at Station TYK2 during July 2004 (Appendix A, Table A-3). The DO concentrations on
this sampling date ranged from 4.7 to 4.8 mg/L from the surface to three meters depth.
The pH values in Lake Tillery ranged from 6.7 to 9.1 units during 2004, and the 2004 overall
reservoir mean value was similar to mean pH values observed in 2000 and 2002 (Tables 5-3 and
5-8). There were significant longitudinal spatial differences in pH during 2000, 2002, and 2004 with
pH values generally lower at Station TYK2 located in the headwaters compared to Stations TY132,
TYD2, TYF2, and TYH2 located in the mid and lower reservoir (Table 5-8). The only exception to
this spatial pattern was in 2000 when mean pH values were similar at Stations TY132 and TYK2.
Spatial differences in pH were likely related to inflows from Falls Lake during the stratification
period (i.e., lower pH in hypolimnetic waters discharged from Narrows Development). Furthermore,
there was significantly greater phytoplankton production (as indirectly assessed through
chlorophyll a concentrations) in the mid and lower reservoir compared to the headwaters (Table 5-3
and Figure 5-8). Station TYK2 was a semi-lotic in nature due to its close proximity to the Falls
Development tailwaters so algal production was likely limited due to flow and subsequent nutrient
uptake and assimilation. Nutrient uptake and assimilation and subsequent algal production were
greater in the mid and lower reservoir areas which coincided with greater pH values in these areas
due to carbon dioxide and pH dynamics associated with photosynthesis (Wetzel 2001).
There were no longitudinal spatial differences in specific conductance, turbidity, or Secchi disk
transparency at Lake Tillery during 2004 or for the 2000, 2002, and 2004 comparison period
(Tables 5-1, 5-2, and 5-8). Additionally, there were no significant temporal differences in turbidity
or Secchi disk transparency values for the three-year comparison period (Table 5-3). As previously
mentioned, turbidity values were usually low with increased values coinciding with large-scale
precipitation events in the river basin and subsequent increased inflows fromthe Falls Development
and/or the Uwharrie River. Annual mean Secchi disk transparency depths for the five stations
ranged from 1.1 to 1.9 m during the three years which indicated overall high water clarity and a
fairly deep photic zone (Table 5-8). Annual mean specific conductance values were significantly
greater for the lower flow years of 2000 and 2002 compared to the 2004 mean value (Table 5-3).
This likely reflected the increased concentrations of anions and cations (i.e., chloride, sodium, and
5-26
Section 5 Results and Discussions
sulfate) through evaporation and less dilution with lower flows. There was likely a "flushing" effect
and dilution of anions and cations in reservoir waters during 2003 and 2004, years with above
normal or near normal precipitation levels.
5.3.1.4 Temperature and DO Stratification Patterns in Lake Tillery
Lake Tillery exhibited a defined seasonal pattern of temperature stratification and DO depletion
during 2004 (Figures 5-9 and 5-10). The reservoir was isothermal with DO concentrations above
5 mg/L during winter, early spring, and fall months (January through April and September through
December). Temperature stratification and DO depletion occurred from May until August with well
defined epilmnion, metalimnion, and hypolimnion strata. Reservoir stratification began in May in
the lower and mid reservoir areas (Stations TY132, TYD2, and TYF2) with a shallow thermocline
observed at 2-3 m (Figure 5-9 and Appendix A, Table A-3). The reservoir stratification at Station
TYH2 was weakly stratified from May through August. Stratification also deepened in the mid and
lower reservoir areas as the summer progressed with the thermocline shifting from 2 to 3 m in May
to 5 to 6 m in June and July and then shifting upwards again to 2 to 3 m in August (Figure 5-9). At
Station TYH2, the thermocline remained at 1 to 3 m during the entire stratification period due to the
shallower nature of the reservoir at this station and the flow-related effects from the Falls
Development and/or the Uwharrie River. The lake destratified in September with isothermal
conditions and DO concentrations greater than 5 mg/L due to above average precipitation and inflow
from tropical storms. The temperature differential between surface and bottom waters generally
decreased from May through August.
A strong clinograde oxygen curve was observed from May through August of 2004 (Figure 5-10).
Dissolved oxygen depletion in the hypolimnion was observed in June through August with DO
concentrations less than 5 mg/L initially observed in the lower reservoir (Stations TY132 and TYD2)
from the reservoir bottom up to 6 or 9 m from the water surface during June. The zone of DO
depletion shifted upwards in the water column to 4 to 7 m below the water surface and progressed
upstream in the reservoir to Stations TYF2 and TYH2 during July and August. Dissolved oxygen
concentrations less than 4 mg/L at Station TY132 occurred at the depth of the intake structure (12 to
19 m) during June through August and most likely persisted into early September based on the
continuous temperature and DO monitoring in the power plant tailwaters (Progress Energy 2005a
and Appendix A, Table A-3). Dissolved oxygen concentrations below 4 mg/L at Station TYH2 were
only observed in bottom waters (7-8 m) during August 2004. This area is shallower than the mid
and lower reservoir areas and flow was often visible atthe surface during periods of operation by the
Falls Development and/or high inflows from the Uwharrie River. These conditions likely inhibited
strong, persistent stratification with an anoxic hypolimnion during periods of average to high
precipitation and inflow.
Station TYK2, located in the reservoir headwaters, was well-mixed and freely circulating throughout
2004. Temperatures and DO concentrations were fairly uniform from the surface to reservoir
bottom (Figures 5-9 and 5-10 and Appendix A, Table A-3). As mentioned previously, DO
concentrations less than 5 mg/L were only observed at Station TYK2 during July.
5-27
Section 5
Results and Discussions
Ja n?uar
?.
?` 4.0 ?;
E
? .?
a ? .O
p 1 .0
?.?
o ?? 1? ? ??
Water temperature (°C)
E
a
0
E
a
m
0

z
W

Q
O
E
O
February
O.2 , {
4.0
?.o
?I .!?
?1?6.0
?,?
o ? 1 ? ?,? 0 ? ?0 ?
Water temperature (°C)
rc?
O. ,? o
4.0
?.o
?I.?
?I?.o
?,0
e
o ?? 15 o ? ?0 ?
Water temperature (°C)
?4pri I
?.??}},
?,Sl
?.o
??//yy r
?i?? q
r1??y.0
L-4?.o
0 5 ?0 ? o
Water temperature (°C)
NGay
?. ?
F
??? ?
?? '?
1 .0
???
0 ? ?0 1 ? o ?
Water temperature (°C)
Jury
?. ? ? ;
4.Q? r
.?
d
1 .o
?.?
?.?
1? ?? ? o ?
Water temperature (°C)
Water temperature (°C)
Station TYB2 Station TYD2 - - - - - - ? Station TYF2 - - - -Station TYH2 Station TYK2
Figure 5-9 Monthly water temperature profiles in Lake Tillery during 2004.
?1ul
?. s. ,
? 4?? ?'.
.., ? .
90.
a
? 1?.Q
?.?
? ? 1? ? 0 ? ?
Water temperature (°C)
August
?. u
,., 4,? ?
? ?.?
a ?.o
0 1.?
O.o
0 ? ?0 1 ??
Water temperature (°C)
ptember
?.
4
? ?.?
..,
?.o ?
? 'f ?.o t
? ?1B,o
o,o
?? ??
Water temperature (°C)
ctvlr
i
? °?}
^a+ ??.o
W '}+yF
??}y. 4+
Lo.o
o ? ?? 1? o o
Water temperature (°C)
??''yy hJ?v?ml??r
4_J'. C s f;
? 4.0 - ? ?
.. ? - r?
Y
Q ?I?.o
o ? .o
o,o
Water temperature (°C)
?eeerr?b?r
,?
4,O
?, i
;?
? ? ,
Q ?,o
Q ? .O
o.O
o ?D ?? 0 ?o 5
5-28
Section 5
Results and Discussions
E
t
Q.
m
?
E
CL
N
?
E
C
d
E
L
a
d
?
E
CL
d
?
E
o.
d
?
0.2 January
i ?
4.0-
8.0-
12.0-
16.0 20.0
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
0.2- February
4.0-
8.0-
12.0-
16.0-
20.0
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
March
0.2-
4.0-
8.0-
12.0-
16.0-
20.O 0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
0.2 April
4.0-
8.0-
12.0-
16.0-
20.0
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
0.2- May
4.0-
8.0-
12.0
16.0
20.0
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
June
0.2 ,
4.0 - - -
8.0-
12.0-
16.0
20.0
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
0.2- July
.2?.
- 4.0 r _
8.0
12.0
a 16.0-
20,0-
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
0 2 August
4.0
E 8.0 _ r == y
12.0-
16.0-
20.0-1
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
Septem ber
0.2-
E 4.0 1
L 8.0-
12.0-
C3 16.0
20.0-
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
October
0.2-
4.0-
8.0
a 12.0
0 16.0-
20.0-1
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
November
0.2-
4.0-
8.0
a 12.0
p 16.0
20.0
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
December
0.2-
E 4.0 r .
w 8.0
S 12.0
0 16.0
20.0-
0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
Station TYB2 Station TYD2 - - - - - - - Station TYF2 - - - - Station TYH2 Station TYK2
Figure 5-10 Monthly DO profiles in Lake Tillery during 2004.
5-29
Section 5 Results and Discussions
Temperature stratification and DO depletion patterns differed slightly during the drought years of
2000 and 2002 (Figures 5-11 to 5-14). Stratification occurred earlier each year at all reservoir
stations, except Station TYK2, and either began in March or April and persisted until August (2000)
or September (2002). In 2000, there was a brief period of stratification in March; but the lake
destratified by April, which was most likely related to increased precipitation and subsequent
reservoir inflow and outflow (Figures 5-11 and 5-12). Stratification recurred in May and continued
through August during 2000 (Figure 5-11). Thermal stratification was disrupted during early
September 2000 with displacement of anoxic bottom waters throughout the water column, especially
in the lower reservoir at Stations TY132 and TYD2 (Figures 5-11 and 5-12). Dissolved oxygen
depletion (< 5 mg/L) also began in the hypolimnion in the lower and mid reservoir areas during June
2000 at depths ranging from 9 to 11 m (Figure 5-12 and Appendix A-1). The DO depletion also
persisted until September 2000 with anoxic DO concentrations (<2mg/L) at the depth of the intake
during this period. No DO concentrations below 5 mg/L were recorded at Stations TY112 or TYK2
during 2000.
During the record drought year of 2002, weak temperature stratification began in March in the
surface waters in the lower reservoir areas; became progressively stronger and deeper through
August; and persisted through September although stratification was somewhatweaker (Figure 5-13
and Appendix A, Table A-2). During May 2002, DO concentrations less than 5.0 mg/L were found
from the reservoir bottom up to 10 to 14 m below the water surface at Stations TY132, TYD2, and
TYF2. Dissolved oxygen concentrations were below 5 mg/L for the lower 7 to 8 m of the water
column at Stations TY132, TYD2, and TYF2 during September 2002. Dissolved oxygen
concentrations were also below 5 mg/L in the lower 2 m of the water column at Stations TY112 and
TYK2 during September 2002. Anoxic conditions (<2 mg/L) were noted at the depth of the intake
structure from July through September 2002 which was similar to observations in 2000 and 2004
(Figures 5-10, 5-12, and 5-14). A small pocket of anoxic water also persisted at Station TYD2 until
October 2002 (Figure 5-14 and Appendix A, Table A-2).
5.3.2 Pee Dee River Reach from the Tillery Hydroelectric Plant to Blewett Falls Lake
5.3.2.1 Spatial and Temporal Trends in Reach 1 Water Chemistry during Power Plant Generation
and No Power Generation Periods
The water quality in the Pee Dee River reach (i.e., Reach 1) from the Tillery Development to
Blewett Falls Lake was spatially and temporally influenced by operations of the Tillery
Hydroelectric Plant and inputs from tributaries from the intervening watershed, most notably the
Rocky River (Tables 5-9 to 5-11 and Appendix C). Flow contributions from the Tillery
Hydroelectric Plant during the power generation period, along with inflows from smaller tributaries,
usually resulted in dilution of Rocky River and other tributary inflows. Conversely, the effects of
the Rocky River inflow into Reach 1 below the confluence were most apparent during periods when
the power plant did not generate for extended periods of time; during very low flow conditions
associated with drought years; or during very high flow events associated with above normal
precipitation events, depending upon the water quality parameter. The Rocky River (Station RR)
had significantly greater hardness, total alkalinity, specific conductance, and concentrations of total
5-30
Section 5
0-2 January
I E % 4 o E %
CL 12 CL
20
0 5 10 15 20 25 30 35
Water temperature (OC)
0-2 February
I E % 4 o E %
CL 12 CL
20
0 5 10 1 E) 20 2 E) .1-0 35
Water temperature (OC)
March
o.2-
4 -
E E
CL 12 -
CL
o
201--
0 5 10 15 20 25 30 35
Water temperature (OC)
April
4-
E E
8 -
CL 12- i CL
20-L
0 5 10 -15 20 25 30 35
Water temperature (OC)
0-2 NbY
4 .P
E r C E
V
12
CL CL
16 0
20 f
0 5 10 15 20 25 10 35
Water temperature (OC)
Results and Discussions
0-2 July
f.4
a
12
16
20
0 5 10 15 20 25 30 35
Water temperature (OC)
Aug u st
0.2
4
12 -
16
20
0 5 10 15 20 25 30 35
Water temperature (6C)
Seplember
0.2
4 -
8
12
16
20
0 5 10 1 S 20 25 30 35
Water temperature (OC)
October
0-2
4 -
12
115
20
0 5 10 15 20 25 30 35
Water temperature (OC)
November
0.2 -
4
12
16
20
0 5 10 15 20 25 30 35
Water temperature (OC)
June 0.2 December
4 4
E E
CL 12 CL 12
16 16
20 20
0 S 10 15 20 25 30 35 0 5 1 15 20 25 30 5
Water temperature (OC) Water temperature (OC)
Station TYB2 Station TYD2 ------- Station TYF2 — — - Station TYH2 Station TYK2
Figure 5-11 Monthly water temperature profiles in Lake Tillery during 2000,
5-31

Section 5
Jinuary
0.2
E 4 E
s f s
�
12 4)
1 +1
i (zi
20
0 2 4 6 8 10 12 14 1 i
Dissolved oxygen (mg/L)
0,2February
4 / M
E k E
i
i
1
i.i
D 1 p
20
0 4 6' 0 10 12 14 16
Dissolved oxygen (mg/L)
.irc h
0.2 r
E 4
s
12 *
o r �
1
20
U 2 4 6 8 10 12 14 10
Dissolved oxygen (mg/L)
April
0.2 1
Results and Discussions
July
0.2
4
12_ r
1'
20 �!
U 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L)
August
0.2
4 -
y
--,
IIII �111111111101111
8-
. M +
} y ` F •
12- r
r
20
0 2 4 (5 8 10 12 '14 10
Dissolved oxygen (mg/L)
0.2 September
4
8-
-12
.12
16 -
20
0 2 4 6 10 12 14 1��
Dissolved oxygen (mg/L)
October
0.2 },
4 1 4-
00
C 12 C 12-
1G
21G D €
2
U T 20
0 2 4 0 10 12 14 1 G k C) 2 4 [5 8 10 12 -14 -1 F
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
May N overn bar
0.2 0.2 +
4- 4 I
i
d
Y
CL 12 CL -12
20
20 �
0 2 4 B 8 10 12 14 1a 0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
June December
0.2 4 � U. a
- - 4
8 6
s s ,
CL 12 CL 1
a� a�
0 16 0 1
20 20 _
0 2 4 6 8 10 12 14 1 0 2 4 6 8 10 12 14 16
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
Station TY132 Station TYD2 - - - - - - - Station TYF2 — — — - Station TYH2 Station TYK2
Figure 5-12 Monthly DO profiles in Lake Tillery during 2000.
5-32

Section 5
0.2 July
,
4
E 8
t 12
16
20
0 5 10 15 20 25 30 35
Water temperature (C)
0.2 January
4
8 r
r 12
16
20
0 5 10 15 20 25 30 35
Water temperature (°C)
0.2 February
t
4
E 8
L 12
0 16
20
0 5 10 15 20 25 30 35
Water temperature (°C)
March
0.2 A01-
4 E 8
L 12
16
20
0 5 10 15 20 25 30 35
Water temperature (°C)
August
0.2
E 4 i
8
r 12
0 16
20
0 5 10 15 20 25 30 35
Water temperature (°C)
0.2 September
,
_ 4
E 8
L 12
16
20
0 5 10 15 20 25 30 35
Water temperature (°C)
Results and Discussions
April
0.2
E 8 E
a 12 0.
p 16 p
20
0 5 10 15 20 25 30 35
Water temperature (°C)
0.2 May
4
E 8 ?t
L 12
0 16
20
0 5 10 15 20 25 30 35
Water temperature (°C)
June
0.2
4 y;'!
8 ??.
L 12
16
20
0 5 10 15 20 25 30 35
October
0.2
4
8
12
16
20
0 5 10 15 20 25 30 35
Water temperature (°C)
November
0.2 7
4 '
8 it
L 12
16
20
0 5 10 15 20 25 30 35
Water temperature (°C)
December
0.2 T <
4
8 '
L 12
m 16
20
0 5 10 15 20 25 30 35
Water temperature (°C) Water temperature (°C)
Station TYB2 Station TYD2 • • • • • . • Station TYF2 -- - - Station TYH2 Station TYK2
Figure 5-13 Monthly water temperature profiles in Lake Tillery during 2002.
5-33
Section 5 Results and Discussions
Januowv
E i
12
•� Lam}
20
Dissolved oxygen (mg/L)
E L
Q1�
D 1��
20
0 2 4 C =) 8 .10 12 14 1
Dissolved oxygen (mg/L)
rrcF-1
0. ;}
4`
i'
CL 1
CL
W
D 16 Pr
20
0 2 4 t=) a '10 12 14 16
Dissolved oxygen (mg/L)
Agri I
0 .
CL9
20
C) 2 4 a '1 '12 14 1
Dissolved oxygen (mg/L)
C1
{}
. ti
CL
July
0,2
4
12
W
11 16
20
2 4 C> B 1 ? 1: '14 16
Dissolved oxygen (mg/L)
Aug u
d
CL
1
D
20
'10 -12 1/1 '15
Dissolved oxygen (mg/L)
0. r
�. 4
E --
1 1,
D 16
20
a 2 4 6 113 10 12 14 -1
Dissolved oxygen (mg/L)
Oaober
4-
E 'I
1
CL
a) .1(
D _
20�
10 12 14 '1 Cay
Dissolved oxygen (mg/L)
U. G
� �rt
1 L
20 20
0 2 4 ri a '10 -12 1/1 1 C-) 0 2 4 6 a '10 -12 1/1 1 [5
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
Jury-
0. r 0, -
E 4 E 4
12 1
0 '1V 0 16
!L .1 - - � 20 _ ..
C) 2 4 (3 B 1 } '12 14 1 C) 2 4 Ci B -10 `12 14 1 E
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
Station TY62 Station TYD2 - - - - - - - Station TYF2 — — — - Station TYH2 Station TYK2
Figure 5-14 Monthly DO profiles in Lake Tillery during 2002.
5-34

Section 5
Results and Discussions
Table 5-9 Means, ranges (in parentheses), and spatial trends of selected water
chemistry parameters during the no power generation period in Reach 1 of
the Pee Dee River below the Tillery Hydroelectric Plant and the Rocky River
during 2004.
Parameter'2 TY1B TY12B RR
No Power No Power
Rocky River
Generation Generation
Temperature (EC) 16.7 166 17.6
(5.9-26.3) (7.0-27.1) (6.4-28.1)
Dissolved oxygen(mg/L) 8.5 8.2 9.7
(4.4-12.4) (4.9-13.8) (6.8-13.8)
Solids (mg/L)
81b 103b 165a
Total solids (64-107) (64-150) (112-300)
Total dissolved 73b 84b 142a
(51-108) (54-107) (108-286)
3.9b l lb 18a
Total suspended (4.8-22) (1.3-46)
6
9b 1826 24a
Turbidity (NTq .
(0.6-18) (9.1-30) (3.2-73)
Nutrients (mg1L)
Total nitrogen 0.58 0.63 0.81 a
(0.32-1.4) (0.36-1.8) (0.31-2.4)

Ammonia-N 0.04 0.04 0.02
(< 0.02-0.09) (< 0.02-0.09) (< 0.02-0.07)
Nitrate +nitrite -N 0.57b 0.68b 2.6a
(0.26-0.83) (0.30-1.2) (1.1-9.4)
0
032b 0
1026 0
3202
Total phosphorus .
(0.015-0.059) .
(0.056-0.276) .
(0.113-1.09)
Total organic carbon (mgiL) 2.7b 4.3a 4.92
(2.1-4.4) (2.8-6.7) (3.3-68)
Chemical oxygen demand (mg/L) <10 <10 11
(<10-14) (< 10-18) (< 10-21)
Biological oxygen demand (mg/L) < 2 < 2 < 2
Ions (mg/L)
Calcium 5.0 6.5 12a
(3.4-5.9) (5.4-8.9) (8.6-24)
2.1` 2.96 4.8a
Magnesium (< 1.0-3.0) (1.5-4.3) (2.2-7.2)
Sodium 6.36 8.01 16a
(4.3-8.4) (5.8-9.1) (7.8-44)
9
1 b 12b 21 a
Chloride .
(6.7-12) (7.8-15) (10-70)
Sulfate 6.0` 8.8b 17a
(2.8-8.9) (4.8-16) (7.4-25)

Hardness (calculated)' c
22 b
29 a
50
(8.4-25) (21-37) (31-90)

Specific conductance ((DS/cm) b
92
(75-102) b
116
(88-146) a
222a
(140-491)
Total alkalinity' 20b 25 b 33 a
(16-27) (16-32) (15-51)
pH 7.5 7.6 7.8
(6.6-9.0) (7.1-8.0) (7.2-9.1)
5-35
Section 5 Results and Discussions
Station
Parameter'2 TY1B TY12B RR
No Power No Potiver
Generation Generation Rocky River
Trace elements (0,q/L)
171-1 41 -A 7f),Aa
Aluminum
Copper
(<50-485) (126-871) (96-2,080)
2.2v 2.8' 4.8a
(< 2.0-5.7) (2.0-4.0) (3.2-7.0)
Mercury 0.2 0.2 0.2
1 Sample size (n) equaled 12. Less than values (<) indicate the Lower Reporting Limit (LRL) for the parameter. The
LRL is a statistically determined limit beyond which chemical concentrations cannot be reliably reported. Statistical
analyses were utilized only when mean concentrations were above the analytical lower reporting limits. Missing
range values indicate that all measured values were less than the LRL for that parameter.
2 Fisher's protected least significant difference (LSD) test was applied only if the overall ANOVA F test for the
treatment was significant. Means followed by different superscripts were significantly different (P # 0.05). Data
were rounded to conform to significant digit requirements. Rounding may obscure mean differences.
3 Total alkalinity units are mglL as CaCO3 and hardness is calculated as mg equivalents CaCO3,,/L.
5-36
Section 5 Results and Discussions
Table 5-10 Means, ranges (in parentheses), and spatial trends of selected water
chemistry parame ters during the power generation period in Reach 1 of the
Pee Dee River below the Tillery Hydroelectric Plant and the Rocky River
during 2004.
Station
Parameter'2 TY1B TY12B RR
Power Power Rocky River
Generation Generation
Temperature (EC) 16.9
(6.2-26.5) 17.2
(6.4-29.7) 17.6
(6.4-28.1)
Dissolved oxygen (mg/L) 8.0 9.4 9.7
(2.9-12.2) (6.1-12.7) (6.8-13.8)
Solids (mg/L)
Total solids 80
7 96 165a
(50-11
) (72-141) (112-300)
Total dissolved 69b 85b 142a
(52-108) (62-109) (108-286)
Total suspended 10
(3.125) 16
(3.9-46) 18
(1.3-46)
Turbidity (NTU) 9.6b 1gab 24a
(1.5-24) (7.2-45) (3.2-73)
Nutrients (mg/L)
Total nitrogen 0.89 0.66 0.81
(0.33-2.9) (0.34-2.0) (0.31-2.4)

Ammonia-N 0.06a 0.02b 0.02b
(< 0.02-0.13) (< 0.02-0.06) (< 0.02-0.07)
0.53b 0.74b 2.6a
Nitrate + nitrite-N (0.20-0.80) (0.39-1.2) (1.1-9.4)
0.034b 0.091b 0.320a
Total phosphorus (0.015-0.049) (0.038-0.197) (0.113-1.09)
Total organic carbon (mg/l,) 2.8`
(2.1-4.8) 3.8b
(2.2-5.8) 4.9a
(33-6.8)
Chemical oxygen demand (mg/L) <10
(< 10-12) <10
(< 10-18) 11
(< 10-21)
Biological oxygen demand (mg/L) <2 <2 < 2
Ions nn/L)
Calcium 5.2 6.0 12a
(3.3-6.4) (3.6-7.8) (8.6-24)
2. lb 2.6b 4.83
Magnesium (< 1.0-2.9) (< 1.0 -3.9) (2.2-7.2)
6.3b 6.6b 16a
Sodium (4.4-8.7) (1.39.5) (7.8-44)
9
Ob 11 b 21 a
Chloride .
(7.0-12) (8.6-13) (10-70)
Sulfate 5.5` 9.8b 17a
(< 2.0-7.5) (5.2-26) (7.4-25)

Hardness (calculated)3 b
(8.2127)

b b
(9.2
0-635)
b a
50
(31-90)
Specific conductance ((DS/cm) gl
(78-99) l l l
(79-162) 222a
(140-491)
Total alkalinity3 b
1 b
22 a
(17
26) (14-33) (15-51)
H
p 7.5 7.4 7.8
(6.8-8.5) (6.4-8.0) (7.2-9.1)
5-37
Section 5
Results and Discussions
Station
Trace elements
Parameter' 2 T IB TPYWeB RR
Power Rocky River
Aluminum (51-600) (1221,260) (96.2,080)
2.0` 2.8" 4.82
Copper (< 2.0-3.3) (1.5-5.0) (3.2-7.0)
Mercury < 0.2 < 0.2 < 0.2
1 Sample size (n) equaled 12. Less than values (<) indicate the Lower Reporting Limit (LRL) for the parameter. The
LRL is a statistically determined limit beyond which chemical concentrations cannot be reliably reported. Statistical
analyses were utilized only when mean concentrations were above the analytical lower reporting limits. Missing
range values indicate that all measured values during, were less than the LRL for that parameter.
2 Fisher's protected least significant difference (LSD) test was applied only if the overall ANOVA F test for the
treatment was significant. Means followed by different superscripts were significantly different (P # 0.05). Data
were rounded to conform to significant digit requirements. Rounding may obscure mean differences.
3 Total alkalinity units are mg/L as CaCO3 and hardness is calculated as mg equivalents CaCO31L.
5-38
Section 5 Results and Discussions
Table 5-11 Paired t-test results of differences for selected water chemistry parameters
between power generation and no power generation flows at Stations TY113
and TY12B in Reach 1 of the Pee Dee River below the Tillery Hydroelectric
Plant during 2004.
Station
Parameters
TY1B TY12B
Temperature (EC) n.s. n.s.
-k -k
Dissolved oxygen (mg/J-)
no generation > generation no generation > generation
Solids (mg/L)
Total solids n.s. n.s.
Total dissolved n.s. n.s.
Total suspended n.s.
generation > no generation
x:
Turbidity (NTL1 n.s.
seneration > no szeneration
Total nitrogen n.s. n. s.
Ammonia-N n. s.
no generation > generation
:x
Nitrate + nitrite-N n. s.
no generation > generation
Total phosphorus n. s. n. s.
Total organic carbon (mg/L) n.s. n. s.
Ions (MzIL)
Calcium n. s. n. s.
Magnesium n. s. n. s.
Sodium n. s. n. s.
Chloride n. s. n. s.
Sulfate n. s. n. s.
Hardness (calculated) n. s. n. s.
Total alkalinity n.s. n. s.
Specific conductance (µS/cm) n.s. n.s.
pH n. s. n. s.
Trace
Aluminum generation> no generation n.s.
Copper n. s. n. s.
1 A paired t-test was applied to detennine differences between surface and bottom concentrations of each parameter
when applicable. P values: n. s. = not significant (P> 0.05), = 0.01 < P # 0.05; ?`* = 0.001 <P #0.01. See Tables
4-1 and 4-2 for mean values of each parameter.
5-39
Section 5 Results and Discussions
solids, total dissolved solids, turbidity, nitrate + nitrite-nitrogen, total phosphorus, total organic
carbon, all anion and cation constituents, aluminum, and copper when compared to Stations TY113
and TY12B in Reach 1 duringthe no generation and power generation periods in 2004 (Tables 5-9
and 5-10). During no power generation or lower flow conditions, the Rocky River influence was
observed below its confluence in Reach 1 with significantly greater concentrations of total organic
carbon, magnesium, sulfate, and hardness at Station TY12B compared to Station TY1B (Table 5-9).
During power generation, concentrations of total organic carbon, sulfate, and copper were
significantly greater at Station TY12B compared to Station TY1B (Table 5-10). Ammonia-nitrogen
was the only parameter that was significantly greater at Station TY113 than at Stations TY 12B and
RR during the power generation period, and this reflected the increased ammonia concentrations in
Lake Tillery bottom waters during the stratification and DO anoxia period (Table 5-3).
A paired t-test was performed to evaluate power generation vs. no power generation flows at
Stations TY113 and TY12B in Reach 1 (Table 5-11). There were few significant differences among
water chemistry parameters between the two flow periods at each station, especially at Station
TY1213. Total suspended solids, turbidity, and aluminum were significantly greater during power
generation flows compared to the no power generation flows at Station TY113. Conversely, the
nitrate + nitrite-nitrogen mean concentration was significantly greater during the no power
generation flows at Station TY1B. At Station TY12B, ammonia-nitrogen was significantly greater
during the no power generation period compared to the power generation period. The lack of
differences between the two flow periods at each station may have been related to (1) the influence
of wicket gate leakage and dam spillage at the Tillery Hydroelectric Plant, which may have been
enough to minimize differences between the power generation and no power generation periods,
mainly at Station TY 1 B and (2) the water from a previous power generation event (at least 6 hours
between power generation events) had not completely passed at Station TY1213.
The influence of Rocky River water quality on downstream water quality in Reach 1 was most
evident when the water quality data for 2000, 2002, and 2004 were combined for comparison
(Table 5-12). There were significantly greater concentrations of all solids constituents, turbidity,
nitrate +nitrite-nitrogen, total phosporus, total organic carbon, COD, all anions and cations, copper,
and specific conductance measurements at Station TY12B when compared to Station TY1B and the
bottom waters of Lake Tillery (i. e., Station TY132). Water chemistry parameters were not measured
during 2000 for the Rocky River (Station RR); however, statistical results of spatial trends for 2000
and 2004 indicated that the Rocky River affected downstream water quality in Reach 1 (Tables 5-9
and 5-10; Progress Energy 2003). The NCDWQ ambient monitoring data for the Rocky River from
1996 to 2001 indicated that although DO concentrations were adequate, pH values were occasionally
high, and specific conductance values indicated anthropogenic impacts (NCDWQ 2002). Similarto
the 2004 results, ammonia-nitrogen was significantly greater in Lake Tillery bottom waters for the
three year comparison (Table 5-12). The mean ammonia-nitrogen concentration at Station TY113
was intermediate to the mean concentrations at Stations TY132 and TY1213.
5-40
Section 5 Results and Discussions
Table 5-12 Comparison of temporal trends of annual means for selected water
chemistry parameters from bottom waters at Station TYB2 in Lake Tillery
and surface waters at Stations TY1B and TY12B in the Pee Dee River below
the Tillery Hydroelectric Plant during 2000, 2002, and 2004.
Station
Parameter' TYB2 TY1B TY12B
Total solids 80b 78b 1132
Total dissolved 741 76' 98a
Total suspended 6.6' 6.8' 19a
Turbidity (NTU) 151 8. lb 24a
Nutrients (mgfL)
Total nitrogen 0.52 0.59 0.66
Ammonia-N 0.08a 0.052' 0.03b
Nitrate + nitrite-N 0.42b 0.41 b 0.59a
Total phosphorus 0.05b 0.041 0.13a
Total organic carbon (mg/L) 3.31 3.21 5.2a
Chemical oxygen demand 111 l lb 17a
Calcium 51' 5.3b 6.3a
Chloride 1 lb 111 15a
Magnesium 2.31 2.21 2.9a
Sodium 8.9b 8 8b 12a
Sulfate 8.51 8.61 13a
Total alkalinity2 24 23 26
Specific conductance ((DS/cm) 99b 104' 1303
Trace elements (4?/L)
Aluminum 369ab 208b 627a
Copper 1.91 1.81 3.8a
1 Statistical analyses were utilized only when the majority of parameter concentrations were above the analytical
lower reporting limits. Fisher's protected least significant difference (LSD) test was applied only if the overall
ANOVA F test for the treatment effect was significant. Means followed by different superscripts were significantly
different (P # 0.05). Data were rounded to conform to laboratory reporting limit requirements. Such rounding may
obscure mean differences. Sample size = 12 for each year.
2 Total alkalinity units are mg/L as CaCO3.
5-41
Section 5 Results and Discussions
Monthly trends of concentrations of nutrients, solids, and turbidity measured during 2004 at Station
TYB2 in Lake Tillery (surface and bottom waters), at Stations TY 1B and TY12B in Reach 1, Rocky
River (Station RR), and at Station BFH2 located in the Blewett Falls Lake headwaters are presented
in Appendix E. All of these data were collected under power generation flow conditions so data
were comparable from station to station. This comparison examined the cumulative effects of
nutrient and solids loading in Reach 1 from the Lake Tillery bottom water released into the reach
and the additional effects of tributary inflow (i.e., Rocky River, Brown Creek, Little River, and
minor tributaries) until the water arrived at the headwaters of Blewett Falls Lake. Spatial trends of
these water chemistry parameters did not closely coincide at all stations during 2004 (Appendix E).
One exception was total nitrogen where peak concentrations were observed in June of 2004 at all
stations, including surface and bottom waters of Lake Tillery. As expected, monthly trends at
Station TY1B closely paralleled trends in the bottom waters of Lake Tillery given the depth of the
intake structure in the lake. Greater turbidity, nitrate +nitrite-nitrogen, and ammonia-nitrogen were
observed in the bottom waters than in the surface waters of Lake Tillery during the winter, spring, or
summer months, depending upon the parameter. Peak concentrations of nutrients, solids, and
turbidity were observed in the Rocky River during June or July 2004, but there were no
corresponding peaks downstream at Station TY12B or Station BFH2. The lack of similarity of
monthly trends in these water chemistry parameters among the Rocky River and downstream
Stations TY12B and BFH2 may have reflected the time lag effect of Rocky River inflow into the
downstream areas of the Pee Dee River and/or the dilution effect of inflows from the Tillery
Hydroelectric Plant and downstream tributaries, such as Brown Creek and the Little River.
A statistical comparison of all water chemistry parameters indicated significantly greater
concentrations of mosttested parameters atthe Rocky River Station RR comparedto bottom waters
of Lake Tillery, Stations TY 1 B and TY 12B in Reach 1, and Station BFH2 in the Blewett Falls Lake
headwaters (Table 5-13). Total organic carbon and sulfate mean concentrations were the only
parameters that showed significantly increased concentrations downstream of the Rocky River.
Chemical oxygen demand, although not statistically tested, also exhibited an increasing trend with
distance from the Tillery Hydroelectric Plant. Ammonia-nitrogen was the only parameter with
significantly greater mean concentrations in Lake Tillery bottom waters and the immediate
tailwaters Station TY1B, which confirmed previous spatial analyses.
5.3.2.2 Relationships between Water Quality and Flow in Lake Tillery Tailwaters and Rocky
River
Kendall's tau b correlation analysis indicated some similar relationships between water quality
parameters and daily average flow at the tailwaters Station TY1B compared to the correlation
analysis for Lake Tillery surface waters for the years 2000, 2002, and 2004 (Table 5-7). There were
significant negative relationships between daily average flow and water temperature, specific
conductance, total alkalinity, and sodium at Station TY1B, although correlation coefficients were
weak to moderate (Table 5-'). Positive relationships were observed between daily average flow and
DO, total suspended solids, turbidity, nitrate + nitrite-nitrogen, total phosphorus, aluminum, and
copper at Station TY1B. Other parameters pH, total solids, total dissolved solids, total nitrogen,
ammonia-nitrogen, total organic carbon, COD, calcium, magnesium, chloride, and sulfate did not
exhibit any significant correlation with daily average flow at Station TY1B.
5-42
Section 5 Results and Discussions
Table 5-13 Spatial trends of mean concentrations of selected water chemistry
parameters at Station BF132 (bottom waters) in Lake Tillery, Stati ons TY113
and TY12B in Reach 1, Rocky River, and Station BFH2 in Blewett Falls
Lake headwaters during 2004. Power generation flow data (excep t Rocky
River) were used for the analysis.
Station

Parameterl'Z
TYB2 TY1
B
RR
TY12B
BFH2
Lake Tillery Pee Dee River Rocky River Pee Dee River Blewett Falls
(Reach 1) (Reach 1) Lake
Solids (Mg L)
Total solids 82 80, 1652 96 84
Total dissolved 701 691 1422 851 721
Total suspended 9.5 10 18 16 7.4
Turbidity (NTL) 19a1 9.61 242 19a1 101
Nutrients (M&L)
Total nitrogen 0.60 0.89 0.81 0.66 0.59
Ammonia-N 0.082 0.062 0.021 0.021 0.021
Nitrate + nitrite-N 0.531 0.531 2.642 0.741 0.631
Total phosphorus 0.0501 0.0341 0.3202 0.0911 0.0601
Total organic carbon 2 9c 8c 4
92 3
81 31c
3
(mg/L) . . .
Chemical oxygen demand
6
7
6
0
11
8
8
7
0
(nglL) 3 . . . .
Biological oxygen < 2 < 2 < 2 < 2 < 2
demand (mg,1) 3
Ions (M&L)
Calcium 4.9 5.2 122 6.0 5.4
Magnesium 2.11 2.11 4.82 2.61 2.41
Sodium 6.01 6.31 16a 6.61 7.2 1
Chloride 9.11 9.01 21 a 111 9.81
Sulfate 5.4c 5 5c 17a 9 81 7 The
Specific conductance 941 911 222a 1111 1011
(cDS;'cm)
Hardness4 211 221 51 a 261 231
Total alkalinity4 211 211 33a 221 231
bH 7.Oc 7.51 7.8a1 7.41 8.0a
Trace elements (d")
Aluminum 666 291 703 528 259
Copper 2.41 2.01 4.8a 2.81 2.21
1 Sample size (n) equaled 12. Statistical analyses were utilized only when the majority of values for a particular
parameter were above the analytical lower reporting limits.
2 Fisher's protected least significant difference (LSD) test was applied only if the overall ANOVA F test for the
treatment was significant. Means followed by different superscripts were significantly different (P # 0.05). Data
were rounded to conform to significant digit requirements. Rounding may obscure mean differences.
3 Data were not statistically tested due to number of values below the laboratory LRL.
Total alkalinity units are mg/L as CaCO3 and hardness is calculated as mg equivalents CaCO3/L.
5-43
Section 5 Results and Discussions
The correlation analysis for the Rocky River for the years 2001, 2002, and 2004 indicated significant
negative relationships between daily average flow and water temperature, specific conductance, total
solids, total dissolved solids, total phosphorus, total organic carbon, total alkalinity, and most anions
and cations (Table 5-7). Significant positive correlations were noted between daily average flow
and total suspended solids, turbidity, and aluminum. Other water quality parameters showed no
significant relationship with daily average flow for the Rocky River.
5.3.2.3 Spatial and Temporal Trends in Temperature, DO, PH, Specific Conductance, and
Turbidity in Reach 1 During Power Generation and No Power Generation Periods
Water temperatures showed a typical seasonal progression in Reach 1 with lowest temperatures
during January, February, or December and a summertime maxima during July or August for the
three years evaluated (Figures 5-15 to 5-17). The temperature regime in the Rocky River (Station
RR) followed the same seasonal pattern with a similar temperature range. Maximum summertime
temperatures ranged from 26.5°to 30.3°C at Stations TY1B and TY12B in Reach 1 over this survey
period with a slightly greater temperature maxima occurring at Station TY 12B. Water temperatures
in Reach 1 did not exceed the North Carolina water quality standard of 32°C in any year (NCDWQ
2004b). The temperature regime within Reach 1 was uniform with no statistically significant spatial
or temporal differences (Tables 5-9 to 5-11). No significant differences were noted in water
temperatures between Stations TY113, TY1213, and RR during either the power generation or no
power generation periods in 2004 (Tables 5-9 to 5-11 and Figure 5-17). Additionally, there were no
significant differences in mean temperatures between the power generation and no power generation
paired t-test comparisons for Stations TYlBand TY12B(Table s-11). Finally, a two-way ANOVA
for Stations TY113, TY1213, and RR for the years 2002 and 2004 (no data collected at Station RR in
2000) found no significant difference in mean temperatures among stations. This comparison
utilized the power generation data for Stations TY1B and TY12B for 2004.
The DO regime in Reach 1 and the Rocky River exhibited a seasonal pattern of greater DO
concentrations in the cooler winter and fall months and DO minima during the warmer summer and
early autumn months (Figures 5-15 to 5-17). There were no significant differences in mean DO
concentrations at Stations TY113, TY1213, and RR during 2004 for comparisons within the power
generation and no power generation period. However, the paired t-tests indicated there were
significantly greater DO concentrations in the no power generation period vs. the power generation
period at Stations TY1B and TY12B during 2004 (Table 5-11). Lower DO concentrations were
observed for these stations during the summer months when low DO water was released from the
hypolimnion of Lake Tillery during power generation periods. The DO minimum was also lower at
Stations TY 1B and TY 12B in Reach 1 when compared to the Rocky River (Station RR) (Figures 5-
16 and 5-17). Dissolved oxygen concentrations less than the North Carolina instantaneous DO
standard of 4.0 mg/L were observed at Station TY 1 B during July and September 2000 and July 2004
(Figures 5-15 and 5-17 and Appendix A, Tables A-4 to A-7). No DO concentrations were less than
4.0 mg/L at Station TY12B during the monthly surveys (2000 to 2004). Dissolved oxygen
concentrations less than 5.0 mg/L (North Carolina daily average DO standard) occurred in
12.5 percent of the monthly measurements at Station TY 1 B from 2000 to 2004 while 2.0 percent of
the monthly DO measurements at Station TY 12B were below 5.0 mg/L. More detailed assessments
5-44
Section 5
Results and Discussions
40
30
0 20
10
n
Temperature
Jan Feb ivbr Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
16
14
12
10
m 8
E 6
4
2
0
uissotvea oxygen
Jan Feb Mar Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
500
400
E 300
V1 200
100
0
Specific conductance
Jan Feb ivbr Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
10
9
8
a 7
6
5
4
Jan Feb ivbr Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
200
150
z 100
z
50
0
Jan Feb ivbr Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
Station TY1 B -? Station TY12B
Figure 5-15 Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations TY1B and TY12B in Reach 1 of the Pee Dee River below
the Tillery Hydroelectric Plant and Station RR located in the Rocky River
during 2000. (Note: No data were collected for Rocky River, Station RR,
during 2000)
5-45
Section 5
Results and Discussions
40
30
0 20
10
0
Temperature
?r ¦
Jan Feb iVbr Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
16
14
12
? 10
m 8
E 6
4
2
0
uissoivea oxygen
Jan Feb iVbr Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
1000
800
E 600
0) 400
200
0
Jan Feb iVbr Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
10
9
8
x 7
a
6
5
A
Specific conduktance
¦--¦.. {-1` ¦ -tom{
Jan Feb Mar Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
100
75
z 50
z
25
0
Turbidity
Jan Feb iVbr Apr ivby Jun Jul Aug Sep Oct Nov Dec
Month
Station TY1 B + Station TY12B-0- Station RR
Figure 5-16 Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations TY1B and TY12B in Reach 1 of the Pee Dee River below
the Tillery Hydroelectric Plant and Station RR located in the Rocky River
during 2002.
5-46
Section 5
Results and Discussions
40
30
U 20
10
0
Temperature
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
16
14
12
10
a 8
E 6
4
2
0
Dissolved oxygen
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
500
400
E 300
U) 200
100
0
10
s
8
x 7
a 6
5
4
Specific conductance
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
pH
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
100
75
50
z
25
0
Turbidity
E
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Station TY1 B + Station TY12B -*- Station RR
Figure 5-17 Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations TY1B and TY12B in Reach 1 of the Pee Dee River below
the Tillery Hydroelectric Plant and Station RR in the Rocky River during
2004. (Note: Power generation flow data are plotted for Stations TY1B and
TY12B.)
5-47
Section 5 Results and Discussions
of DO dynamics in Reach 1, including attainment of the North Carolina water quality standards for
DO, are given in Progress Energy 2005a and 2005b. All DO concentrations in the Rocky River
were above 5.0 mg/L during 2001, 2002, and 2004 (Figures 5-16 and 5-17 and Appendix A,
Tables A-5 to A-7).
Peak values of specific conductance were noted in the summer months in the Rocky River (Station
RR) and Station TY1213, especially during 2002 (Figures 5-15 to 5-17). Specific conductance
values were uniform at Station TY1B. The mean specific conductance was significantly greater in
the Rocky River than the mean values at Stations TY113 and TY1213, which were statistically
similar, during the power generation and no power generation periods in 2004 (Tables 5-9 and 5-10).
There was also no significant difference between the power generation and no power generation
periods for the paired t-test comparisons for Stations TY1B and TY12B (Table 5-11). However, the
influence of Rocky River inflow on specific conductance in Reach 1 was evident in the temporal
comparison for 2000, 2002, and 2004 because specific conductance was significantly greater at
Station TY12B that at Stations TY132 and TY113 (Table 5-12).
The pH values at Stations TY1B and TY12B were usually uniform and exhibited no distinct
seasonal trends during 2000, 2002, or 2004 (Figures 5-15 to 5-17). There were no significant
differences in pH values during power generation or no power generation periods for these stations
during 2004 or for all three monitoring years. All pH values in Reach 1 (Stations TY1B and
TY1213) were within the North Carolina water quality pH standards of 6.0 to 9.0 units during the
three years of monitoring and also during 2001 when some additional monitoring was conducted
(Appendix A, Tables A-4 to A-7). One pH value (9.1 units) in the Rocky River slightly exceeded
the North Carolina water quality standard during January 2004 (Figure 5-17 and Appendix A,
Table A-7).
Turbidity values exhibited seasonal variability and peak values were usually associated with
precipitation events and subsequent inflows into the river basin (Figures 5-15 to 5-17). Turbidity
values were generally greater in the Rocky River and Station TY1213; located downstream of the
river confluence, when compared to Station TY113 during 2004 or for the three years of water
quality surveys (Tables 5-9, 5-10, and 5-12). This spatial difference was attributed to the greater
sediment loading in the Rocky River watershed. The paired t-test comparison indicated significantly
greater turbidity values during the generation period vs. no generation period at Station TY1B
during 2004 (Table 5-11). There were no significant differences between the two generation periods
for Station TY1213. Occasional turbidity values greater than the North Carolina water quality
standard of 50 NTU were observed at Station TY12B in 2000 and 2001 (103-157 NTU) and in the
Rocky River during 2001 and 2004 (55 and 83 NTU). No monthly turbidity values exceeded the
water quality standard at Station TY113 during the 2000-2004 period (Figures 5-15 to 5-17 and
Appendix A, Tables A-4 to A-7). Turbidity levels were lower in the Tillery tailwaters due to the
filtering effect of sediments by upstream reservoirs, including Lake Tillery.
5.3.3 Blewett Falls Lake
5.3.3.1 Spatial and Temporal Trends in Blewett Falls Lake Water Chemistry
Blewett Falls Lake is a shallow, nutrient-enriched, turbid, eutrophic reservoir with elevated solids
and turbidity and weakly buffered soft waters (Tables 5-14 and 5-15). Concentrations of total
5-48
Section 5 Results and Discussions
nitrogen and total phosphorus were elevated in Blewett Falls Lake for the survey period of 1999,
2001, and 2004 and indicated eutrophic conditions (Wetzel 2001). This eutrophic characterization
was consistent with results from previous investigations since the 1980s (NCDEM 1983, 1989,
1992; CP&L 1995; NCDWQ 1998, 2002). Nutrient and sediment inputs from the surrounding
watershed, most notably the Rocky River, resulted in distinct differences in the water quality
characteristics and trophic status of Blewett Falls Lake compared to Lake Tillery. Total solids, total
suspended solids, turbidity, total phosphorus, total organic carbon, and specific conductance were
greater in the surface waters of Blewett Falls Lake when compared to Lake Tillery during 2004
(Tables 5-1 and 5-14). For example, annual mean turbidity was 1.5 times greater in Blewett Falls
Lake than in Lake Tillery during 2004. Conversely, Secchi disk transparency was less in Blewett
Falls Lake due to its turbid nature, usually less than one meter deep.
The short retention time of Blewett Falls Lake (average of two days) resulted in few longitudinal
differences in water chemistry parameters from the headwaters to lower reservoir during 2004 or for
the survey years of 1999, 2001, and 2004 (Tables 5-14 and 5-15). The only spatial difference during
2004 was a significantly greater mean concentration of total suspended solids at Station BFB2
compared to Station BFH2 (Table 5-14). The total suspended solids mean concentration at Station
BFF2 did not significantly differ from the other two stations. Secchi disk transparency was
significantly greater at the headwaters Station BFH2 compared to the mid and lower reservoir area
forthe 1999, 2001, and 2004 period (Table 5-15). The nitrate +nitrite-nitrogen mean concentration
at Station BFH2 was significantly greater than the mean concentration at Station BFB2. The
nitrate+nitrite mean concentration at Station BFF2 was intermediate in statistical ranking to Stations
BFB2 and BFH2.
Temporal analysis of water chemistry parameters during 1999, 2001, and 2004 indicated significant
differences among years for mean concentrations of DO, total solids, total dissolved solids, all
nutrient, anion, and cation constituents, total organic carbon, chemical oxygen demand, total
alkalinity, hardness, pH, specific conductance, and copper (Table 5-16). Generally, most of these
parameters had significantly greater mean concentrations during the lower flow years of 1999 and/or
2001 when compared to 2004 (Figures 5-2 and 5-6). The exceptions were total nitrogen, nitrate +
nitrite-nitrogen, DO, and pH, which were similar to or greater in 2004 when compared to 1999 and
2001.
Anion and cation concentrations in reservoir surface waters were in the moderate range during 2004
and ranked respectively as follows: sodium > calcium > magnesium and bicarbonate (alkalinity) >
chloride > sulfate (Tables 5-14 and 5-16). This ranking was similar to other survey years except that
sodium and sulfate were more predominant in the lower flow years of 1999 and 2001.
5-49
Section 5 Results and Discussions
Table 5-14 Means, ranges (in parentheses), and spatial trends of water chemistry
parameters from the surface and bottom waters of Blewett Falls Lake
(Stations BF132, BFF2, and BFH2) during 2004.
Parameter"' BFB2 BFB2 BFF2 BFF2 BFH2
Surface Bottom Surface Bottom Surface
Temperature (EC) 18.6 16.9 18.7 17.1 18.2
(6.9-30.9) (6.4-27.6) (6.2-30.9) (6.0-27.7) (65-30.2)
11
0 7
3 10
2 7
4 10
-
Dissolved oxygen (mg/L) . . . . .
,
(7.7-14.1) (1.4-12.4) (6.8-12.7) (0.7-12.6) (7.0-13.2)
Total solids 90 109 86 112 84
(73-121) (78-180) (71-105) (84-186) (64-115)
Total dissolved 74
(51-118) 72
(56-111) 70
(54-106) 73
(56-104) 72
(52-105)
Total suspended l la 10 8.4ab 8.4 7.4b
(3.3-18) (6.6-168) (4.4-17) (8.2-100) (4.4-17)
Turbidity (NTtD 12
(0.5-20) 37
(6.5-76) 12
(0.9-28) 53
(2.6-153) 10
(0.5-31)
Secchi disk transparency 0.7 NA 4 0.8 NA 4 0.9
depth (m) (0.3-1.1) (0.4-1.5) (0.4-1.4)
Nutrients (mg/L)
Total nitrogen 0.57 0.95 0.62 0.68 0.59
(0.37-0.80) (0.32-3.9) (0.36-1.4) (0.40-1.2) (0.30-1.3)

Ammonia-N 0.03 0.07 0.03 0.09 0.02
(__ 0.02-0.11) (< 0.02-0.19) (< 0.02-0.14) (< 0.02-0.31) (< 0.02-0.07)
Nitrate + nitrite-N 0.51 0.65 0.58 0.56 0.63
(< 0.02-0.86) (0.24-1.54) (< 0.02-0.87) (0.13-0.86) (< 0.02-1.4)
Total phosphorus 0.062 0.133 0.061 0.095 0.061
(0.037-0.086) (0.051-0.654) (0.044-0.092) (0.054-0.205) (0.033-0.122)
Total organic carbon (mg/L) 3.2 3.3 3.2 3.2 3.3
(2.2-4.6) (2.3-4.8) (2.2-4.4) (2.2-4.5) (2.5-4.8)
Chlorophyll a((Dg/L) (3.9-33) 16
NA4
(1.51-0 26
NA4

8.5
(1.2-26)
Chemical oxygen demand < 10 <10 <10 <10 <10
(mg/L) (< 10-14) (< 10-14) (< 10-22) (< 10-18) (< 10-14)
Biological oxygen demand < 2 < 2 < 2 1.2 < 2
(mg/L) (< 2-3.4) < 2-4.2 (< 2-3.0) (< 3.6) (< 2-2.5)
Calcium 5.4 5.9 5.3 5.8 5.4
(1.8-6.5) (1.8-8.9) (1.9-6.4) (2.0-7.2) (1.6-7.1)
Magnesium 2.3 2.8 2.3 2.6 2.4
(< 1.0-2.7) (< 1.0-6.6) (< 1.0-3.0) (1.0-3.5) (< 1.0-3.6)
Sodium 6.9 6.9 7.1 7.3 7.2
(4.8-8.6) (5.1-8.7) (5.0-9.5) (5.7-10) (4.8-12)

Chloride 9.8 9.8 9.7 9.9 9.8
(6.8-13) (7.6-12) (6.7-13) (6.8-14) (6.8-16)
Sulfate 6.9 7.0 6.9 7.4 7.1
(5.1-9.7) (5.3-10) (5.6-8.6) (5.2-12) (3.5-12)
Specific conductance ((DS/cm) 99
(85-114) 104
(92-130) 101
(83-117) 106
(95-131) 101
(78-150)
Hardness(calculated)5 23 26 22 25 23
(4.5-27) (4.4-49) (4.7-28) (9.2-32) (4.1-32)
Total alkalinity' 23 23 22 23 23
(20-26) (19-26) (18-26) (15-36) (19-33)
H
p 8.2 7.2 7.9 7.3 8.0
(7.1-9.6 (6.6-7.9) (7.0-9.1) (6.6-7.8) (6.9-9.0)
5-50
Section 5 Results and Discussions
Station
Parameter BFB2 BFB2 BFF2 BFF2 BFH2
Surface Bottom Surface Bottom Surface
Trace elements (Og/L)
Aliuninum 290 927 309 1,018 259
(90-721) (181-3,080) (86-940) (284-3,830) (104-884)
Copper 2.6 3.3 2.2 4.0 2.2
(1.3-5.3) (1.6-5.9) (< 2.0-3.6) (1.6-9.4) (< 2.0-4.2)
Mercury < 0.2 < 0.2 < 0.2 < 0.2 < 0.2
1 Sample size (n) equaled 12. Less than values (<) indicate the Lower Reporting Limit (LRL) for the parameter. The
LRL is a statistically determined limit beyond which chemical concentrations cannot be reliably reported. Statistical
analyses were utilized only when mean concentrations were above the analytical lower reporting limits. Missing
range values indicate that all measured values were less than the LRL for that parameter.
2 Fisher's protected least significant difference (LSD) test was applied only if the overall ANOVA F test for the
treatment was significant. Means followed by different superscripts were significantly different (P # 0.05). Data
were rounded to conform to significant digit requirem ents. Rounding may obscure mean differences. The statistical
test results only apply to surface waters at Stations BFB2, BFF2, and BFH2.
3 December values for total suspended solids, chemical oxygen demand, aluminum, and copper were omitted due to
suspected sample contamination.
4 NA means not applicable because no Secchi disk transparency or chlorophyll a data were collected from bottom
waters.
5 Total alkalinity units are mg/L as CaCO3 and hardness is calculated as mg equivalents CaCO3/L.
5-51
Section 5 Results and Discussions
Table 5-15 Comparison of spatial trends of annual means for selected water chemistry
parameters at Stations BFB2, BFF2, and BFH2 from the surface waters of
Blewett Falls Lake for 1999, 2001, and 2004.
Parameter"' Station
13FB2 BFF2 BFH2
Temperature CC) 18.6 18.5 17.9
Dissolved oxygen (mg/L) 10.0 10.0 9.7
Total solids 9b 9-1) 94
Total dissolved 88 85 89
Total suspended 8.9 9.5 7.2
Turbidity (NTq 14 15 11
Secchi disk transparency depth (m) 0.8b 0.81 l.la
Ainm onia-N 0.06 0.04 0.04
Nitrate + nitrite-N 0.40b 0.46x1 0.58a
Total nitrogen 0.56 0.56 0.48
Total phosphorus 0.078 0.087 0.089
Total organic carbon (mg/L) 4.2 3.9 3.9
Chemical oxygen demand 12 12 11
Chlorophyll a (, ig/L) 15a 13a 6.76
Calcium 6.0 5.9 6.1
Chloride 12 12 13
Magnesium 2.6 2.5 2.6
Sodium 12 12 13
Sulfate 10 9.7 11
Total alkalinity (mg/L as CaCO3) 28 27 28
Hardness (mg equivalents CaCO3/L) 26 25 26
Specific conductance ((DS/cm) 123 122 125
pH 7.4 7.4 7.4
Aluminum 266 292 239
Copper 2.9 19 3.2
1 Sample size (n) equaled 36 for each parameter and station. Less than values (<) indicate the Lower Reporting Limit
tLRL) for the parameter. The LRL is a statistically determined limit beyond which chemical concentrations cannot
be reliably reported. Statistical analyses were utilized only when mean concentrations were above the analytical
lower reporting limits. Missing range values indicate that all measured values were less than the LRL for that
parameter.
2 Fisher's protected least significant difference (LSD) test was applied only if the overall ANOVA F test for the
treatment was significant. Means followed by different superscripts were significantly different (P # 0.05). Data
were rounded to conform to significant digit requirements. Rounding may obscure mean differences.
5-52
Section 5 Results and Discussions
Table 5-16 Comparison of temporal trends of annual means for selected water
chemistry parameters from the surface waters of Blewett Falls Lake
(Stations BFB2, BFF2, and BFH2) for 1999, 2001, and 2004.
Parameter' Year
1999 2001 2004
Temperature (BC) 18.5 18.0 18.5
Dissolved oxygen (mg/L) 9.1b 10.1a 10.5a
Solids (mg/L)
Total solids 91' 107a 87'
Total dissolved 90a 100a 72'
Total suspended 8.0 8.7 8.8
Turbidity (NTI) 15 14 11
Secchi disk transuarencv denth (m) 0.9 0.9 0.8
Nutrients (mg/L)
Ammonia-N 0.05a 0.07a 0.03b
Nitrate + nitrite-N 0.37' 0.50ab 0.57a
Total nitrogen 0.42' 0.58a 0.59a
Total phosphorus 0.075b 0.117a 0.061'
Total organic carbon (mg/L) 4.6b 4 8a 3.2c
Chemical oxygen demand I lb 16a 8.0`
Chloronhvll a (uaI) 9.4 14 11
Ions (mg/L)
Calcium 5.41 7 2a 5.4 b
Chloride 12b 15a 8`
Magnesium 2.5b 2.9a 2.3b
Sodium 14a 15a 7.Ob
Sulfate 9.0' 14a 6.9`
Total alkalinity (mg/L as CaCO3) 28' 34a 23`
Hardness (mg equivalents CaCO3/L) 24' 30a 23'
Specific conductance ((DS/cm) 124b 145a 100`
pH 7.Ob 7.2b 8.0a
Trace elements (d?%L)
Aluminum 228 283 286
Copper 3.93 2.6b 2.4b
1 Sample size (n) equaled 36 for each parameter and year. Less than values (<) indicate the Lower Reporting Limit
tLRL) for the parameter. The LRL is a statistically determined limit beyond which chemical concentrations cannot
be reliably reported. Statistical analyses were utilized only when mean concentrations were above the analytical
lower reporting limits. Missing range values indicate that all measured values were less than the LRL for that
parameter.
2 Fishers protected least significant difference (LSD) test was applied only if the overall ANOVA F test for the
treatment was significant. Means followed by different superscripts were significantly different (P # 0.05). Data
were rounded to conform to significant digit requirements. Rounding may obscure mean differences.
5-53
Section 5 Results and Discussions
There were some significant differences in surface versus bottom concentrations of several water
chemistry variables at Stations BFB2 and BFF2 during 2004 (Tables 5-14 and 5-17). The Pee Dee
River inflow likely influenced concentrations of several water chemistry parameters in the bottom
waters at Station BFF2. Annual mean concentrations of total solids, total suspended solids,
turbidity, ammonia-nitrogen, total phosphorus, aluminum, and copper were significantly greater in
bottom waters than in surface waters at Stations BFF2. At Station BFB2, only total solids and
turbidity were significantly greater in bottom waters compared to surface waters.
Copper and mercury concentrations were generally low in the reservoir during 1999, 2001, and 2004
(Tables 5-14 to 5-16 and Appendix D, Tables D-1 to D-3). Mercury concentrations were less than
the laboratory reporting limit of 0.2 gg/L for all samples collected in the three survey years. Copper
concentrations occasionally exceeded the North Carolina Action Level of 7 gg/L with the greatest
number of samples exceeding the Action Level occurring in 1999 (25 percent of the 36 samples
collected from Stations BFB2, BFF2, and BFH2) (Appendix D, Tables D-1 to D-3).
Chlorophyll a concentrations were variable and ranged from 1.8 to 41 gg/L in 1999, from 2.7 to
39 gg/L in 2001, and from 1.2 to 33 gg/L in 2004 (Figure 5-18). Although total nitrogen and
phosphorus concentrations were elevated in Blewett Falls Lake, annual mean chlorophyll a
concentrations were in the moderate range (9.4 to 14 gg/L) reflecting meostrophic conditions. Algal
dynamics were largely influenced by reservoir's short hydraulic retention time which limited nutrient
uptake by phytoplankton and subsequent production. Additionally, turbid water conditions,
resulting mainly from sediment inputs, limited light penetration for photosynthesis. During periods
of lower inflow and power generation, algal photosynthesis and production increased and
subsequently chlorophyll a concentrations peaked. No significant temporal differences in mean
chlorophyll a concentrations were found among the three survey years (Table 5-16). There was a
significant longitudinal difference in chlorophyll a concentrations from the headwaters to the lower
reservoir over the three survey years (Table 5-15 and Figure 5-18). Chlorophyll a concentrations
were greater at the mid and lower reservoir stations than at the headwaters station for the three-year
period. Only one chlorophyll a value exceeded the North Carolina water quality standard of
40 gg/L, and that value (41 gg/L) occurred at Station BFF2 during June 1999.
5.3.3.2 Relationships between Water Quality and Lake Level and Flow in Blewett Falls Lake
Kendall's tau b correlation analysis showed several significant, but weak relationships between daily
average lake level and water quality parameters in Blewett Falls Lake (Table 5-18). There were
significant negative correlations between lake level and pH, total suspended solids, and aluminum
(i.e., a lower lake level corresponded to a greater concentration of a given parameter). Significant
positive correlations occurred between lake level and specific conductance, ammonia-nitrogen, total
alkalinity, sodium, and sulfate. The negative correlations suggested that lake level was lowered
during anticipated high flow events to capture the inflow or that the dam flash boards were displaced
due to the amount of inflow compared to the reservoir volume and power plant hydraulic capacity.
Aluminum and total suspended solids are usually elevated during and immediately after high-flow
events while pH can be lower due to the slightly acidic nature of precipitation. Conversely, ahigher
lake level may have indicated less lake level fluctuation during lower flow periods which usually
5-54
Section 5 Results and Discussions
Table 5-17 Paired t-test results of differences between surface and bottom waters at
Stations BFB2 and BFF2 for selected water chemistry parameters in Blewett
Falls Lake during 2004.
Parameterr12 Station
BFB2 BFF2
Solids (m,-,IL)
Total solids bottom > surface bottom > surface
Total dissolved n.s. n.s.
**
Total suspended n.s.
bottom > surface
Turbidity (NTL>7
bottom => surface bottom > surface
Nutrients (mg/L)
Total nitrogen n.s. n. s.
Ammonia-N n. s.
bottom > surface
Nitrate + nitrite-N n.s. n. s.
.k
Total phosphorus n. s. bottom > surface
Total organic carbon (mg/L) n. s. n. s.
Ions (nwlL)
Calcium n. s. n. s.
Magnesium n. s. n. s.
Sodium n. s. n. s.
Chloride n. s. n. s.
Sulfate n. S. n. s.
Hardness (calculated) n. S. n. s.
Total alkalinity n.s. n. s.
Trace elements (0,qJL)
.k
Aluminum n. s.
bottom > surface
Copper n. s.
bottom > surface
1 A paired t-test was applied to determine differences between surface and bottom concentrations of each parameter
when applicable. P values: n.s. =not significant (P> 0.05), * = 0.01 < P # 0.05; ** = 0.001 < P # 0.01, and *** = P
0.001. See Tables 4-1 and 4-2 for values of each parameter.
2 Bottom samples of aluminum, copper, total suspended solids, and COD during December 2004 were excluded from
analysis due to suspected sample contamination.
5-55
Section 5
Results and Discussions
a 60
Blewett Falls Lake -1999
= 50
40
'5. 30
0 20
B 10
V 0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Station BFB2 -Station BFF2 Station BFI-12
60
50
40
S 30
0 20
0 10
L) 0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Station BFB2 -Station BFF2 Station BFI-12
60
50
40
30
0 20
0 10
V 0
Blewett Falls Lake - 2004
P=
Not
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Station BFB2 -Station BFF2 Station BFI-12
Figure 5-18 Temporal and spatial trends in chlorophyll a concentrations in Blewett Falls
Lake during 1999, 2001, and 2004. (Note: Statistical results among lake
stations are shown within each graph with different letter superscripts
indicating significantly different mean values.)
5-56
Section 5 Results and Discussions
Table 5-18 Kendall's tau b correlation coefficients of daily average lake level versus
water quality parameters in the surface waters of Blewett Falls Lake
(Stations BFB2, BFF2, and BFH2) for the period of 1999, 2001, and 2004.
Parameter' Kendall's Tau b Correlation Coefficient
Temperature n. s.
Dissolved oxygen n. s.

PH -0.3287
***
Specific conductance 0.1*57
Total solids n. s.
Total dissolved solids n. s.
Total suspended solids 0.1346
Turbidity n. s.
Total nitrogen n. s.
Ammonia-N 0.2701
***
Nitrite + nitrate-N n. s.
Total phosphorus n. s.
Total organic carbon n. s.
Chlorophyll a n. s.
Total alkalinity 0.1809
**
Chemical oxygen demand n. s.
Calcium n. s.
Magnesium n. s.
Sodium 0.1905
**
Chloride n. s.
Sulfate 0.1649
*
Aluminum -0.1532
*
Copper n. s.
1 Pvalues: n.s.=not significant(P>0.05),*=0.01<P#0.05;**=0.001<P#0.01,and***=P<0.001
5-57
Section 5 Results and Discussions
corresponded to increased anion and cation concentrations, specific conductance, and total
alkalinity. The response of ammonia-nitrogen concentrations may have resulted from denitrification
processes and increased concentrations with a greater retention time associated with lower flow and
associated lake level conditions.
Weak to moderately significant negative relationships existed for the majority of correlations
between daily average flow and water quality parameters, which included total solids, total dissolved
solids, ammonia-nitrogen, total phosphorus, total organic carbon, chlorophyll a, total alkalinity,
COD, all anions and cations, and specific conductance (Table 5-19). Higher flow resulted in
increased reservoir flushing with a shorter reservoir retention time, and subsequently decreased
concentrations of these parameters. Most high flow events occurred during the winter, early spring
or fall months (usually associated with passage of low pressure and tropical storm weather systems).
Lower flow periods, including both inflow and outflow, coupled with evaporative processes,
increased solids, anions, cations, specific conductance, nutrients, and subsequent algal
photosynthesis and chlorophyll a concentrations. The higher COD values likely resulted from
greater organic decomposition with increased hydraulic retention time during lower flow periods.
There were weak, but significant positive correlations between flow and DO, nitrate + nitrite-
nitrogen, aluminum, and copper (Table 5 19).
5.3.3.3 Spatial and Temporal Trends in Temperature, Dissolved Oxygen, pH, Specific
Conductance, Secchi Disk Transparency, and Turbidity in Blewett Falls Lake Surface
Waters
The temperature and DO regimes in Blewett Falls Lake surface waters were uniform with no
longitudinal gradient observed for either parameter during 2004 or for the 1999, 2001, and 2004
survey period (Tables 5-14 and 5-15 and Appendix B, Tables B-1 to B-3). Water temperatures in
the reservoir follow an annual seasonal cycle with minimum temperature ranging from 6°to 8°C and
maximum temperatures ranging from 28°to 32°C (Appendix B, Tables B-1 to B-3). There were no
instances of water temperatures exceeding the North Carolina water standard of 32°C during the
three years of water quality surveys. Dissolved oxygen concentrations in reservoir surface waters
were above the North Carolina instantaneous (4.0 mg/L) and daily average (5.0 mg/L) water quality
standards in 2004 as well as in 1999 and 2001 (Appendix B, Tables B-1 to B-3). There were some
instances of supersaturated dissolved oxygen conditions, and these events were usually associated
with phytoplankton blooms in the reservoir (e.g., May 2001 and 2004 and July to August 2004).
There were significantly greater mean DO concentrations during 2001 and 2004 compared to 1999
which may have resulted from greater algal photosynthesis during those years (Table 5-16 and
Figure 5-18).
The pH values in reservoir surface waters ranged from near neutral to basic during the survey years
of 1999, 2001, and 2004 (Tables 5-14 and 5-16 and Appendix B, Tables B-1 to B-3). Similar to
temperature and DO, there were no significant longitudinal or spatial differences in pH values within
the reservoir during 2004 orforthe three year survey period (Tables 5-14 and 5-15). However, the
mean pH value was significantly greater in 2004 compared to the 1999 and 2001 mean values
(Table 5-16). There were occasional pH values in reservoir surface waters that exceeded the North
5-58
Section 5 Results and Discussions
Table 5-19 Kendall's tau b correlation coefficients of daily average flow (cfs) versus
water quality parameters in the surface waters of Blewett Falls Lake
(Stations BFB2, BFF2, and BFH2), the Pee Dee River tailwaters below the
Blewett Falls Hydroelectric Plant (Stations BF113 and BF2B), and the lower
Pee Dee River (Stations BFB3 and BFB4) for the years 1999, 2001, and 2004.
Location
Parameter Blewett Falls Lower Pee Dee
Blewett Falls Lake
Tailwaters River
Temperature -0.1775 -0.2715 -0.2498

Dissolved oxygen 0.1556 0.1* 17 n. s.

pH n. s. n. s. n. s.
Specific conductance -0.3890 -0.4848 -0.5296

Total solids -0.2142 n s -0.3010

Total dissolved solids -0.2017 n s -0.3483

Total suspended solids n. s. 0.3166 0.3198

Turbidity n. s. 0.3229 0.4156

Total nitrogen n. s. n. s. n. s.
Ammonia-N -0.2229 -0.2205 n. s.

Nitrate-nitrite-N 0.1553 0.3770 0.3997

Total phosphorus -0.2009 n s -0.1892

Total organic carbon -0.2118 n s -0.1606

Chlorophyll a -0. **32 NA NA

Total alkalinity -0.4271 -0.3882 -0.4887

Chemical oxygen demand 0
.25
15 n. s. -0.1891
**
*
Calcium -0.2370 n. s. n. s.

Magnesium -0.2270 -0.2418 n. s.

Sodium -0.3397 -0.3759 -0.5443

Chloride -0.3240 -0.3663 -0.4524

Sulfate -0.3781 -0.3785 -0.3976

Aluminum 0.1585 0.3911 0.3420

Copper 0.1420 n. s. n. s.
1 Average daily flow estimated for BF2B by applying average flow (cfs) per square mile to USGS Rockingham gage
data.
2 Pvalues: n.s.=notsignificant(P>0.05),*=0.01<P#0.05, **=0.001<P#0.01,and***=P<0.001.
5-59
Section 5 Results and Discussions
Carolina water quality standard of 9.0 units (NCDWQ 2004b), and these exceedances were
associated with algal bloom conditions, especially during 2004 (Appendix B, Tables B-1 to B-3).
Approximately 3 and 11 percent of the surface water pH measurements taken during 2001 and 2004,
respectively, exceeded 9.0 units. No pH values measured in 1999 from Blewett Falls Lake exceeded
9.0 units.
There were no spatial differences in specific conductance orturbidity from the headwaters to lower
reservoir area during 2004 or for the 1999, 2001, and 2004 period (Tables 5-14 and 5-15). Both
water quality parameters were greater in Blewett Falls Lake when compared to Lake Tillery, which
reflected the influence of the Rocky River inflow on the reservoir's water quality (Tables 5-2 and
5-15). Annual mean specific conductance values were significantly greater during the lower flow
years of 1999 and 2001 compared to 2004 and corresponded to the significant increases of anions,
cations, and total dissolved solids in reservoir waters (Table 5-16). There were no temporal
differences in mean turbidity values among the three years of water quality surveys (Table 5-16).
However, there were several instances during the three years of water quality surveys when
turbidity values in both surface and bottom waters of Blewett Falls Lake exceeded the North
Carolina water quality standard of 25 NTU (NCDWQ 2004b). The number of turbidity exceedances
per total number of sample measurements for surface waters within a given year were 14 percent
during 1999, 11 percent during 2001, and 6 percent during 2004 (Appendix D, Tables D-1 to D-3).
For bottom water measurements at Stations BFB2 and BFF2 during 2004, the number of turbidity
exceedances was 79 percent of the total number of measurements. Annual peak turbidity values in
reservoir surface waters ranged from 31 to 52 NTU during 1999, 2001, and 2004.
Secchi disk transparencies indicated turbid water conditions in Blewett Falls Lake (Tables 5-14 to
5-16 and Appendix B, Tables B-1 to B-3). The mean reservoir-wide Secchi disk transparency
ranged from 0.8 to 0.9 m during the 1999, 2001, and 2004 survey period (Table 5-16). These turbid
conditions resulted in a shallow photic zone (approximately 1 to 2 m) within the reservoir. Spatially,
the headwaters Station BFH2 had a significantly greater Secchi disk transparency depth than the mid
and lower reservoir areas (Stations BFB2 and BFF2) for the three year survey period (Table 5-15).
No spatial differences were noted in Secchi disk transparencies during 2004 (Table 5-14).
5.3.3.4 Temperature and DO Stratification Patterns in Blewett Falls Lake
The shallow nature of Blewett Falls Lake, coupled with river inflow and power plant operations,
influenced the temperature stratification and DO depletion patterns within the reservoir
(Figures 5-19 to 5-24). In contrast to Lake Tillery, which had a well-defined temperature
stratification period, Blewett Falls Lake had very weak to moderate temperature stratification in the
middle and lower reservoir areas during the summer months. Water temperature differences from
the surface to bottom waters ranged from 0.4°to 5.2°C during the temperature stratification periods
of 1999, 2001, and 2004. The upper reservoir (Station BFH2) was always well-mixed and uniform
in temperature and DO throughout the year due to the shallow, semi-riverine nature of this
headwaters area (Appendix B, Tables B-1 to B-3). Temperature stratification and DO depletion
were also independent processes in Blewett Falls Lake and therefore did not closely correspond
together as observed in Lake Tillery. There were also no well-defined epilimnion, metalimnion, and
hypolimnion strata in Blewett Falls Lake during the stratification period as was the case in Lake
Tillery.
5-60
Section 5
January
0.2 i�
0.2
E 2.0
E
2,O
4.0d
�^
.0
CL
Q
F
CL
Q
.0
i
,0
8.0
8.0
U 5 10 '15 20 25 30 35
0
Water temperature (°C)
February
Results and Discussions
5 10 15 2C) 25 53 1 � 5
Water temperature (°C)
August
0.2 0,2 .
2.0 E 2.0
1
4.0 4,0
CL
X3.0 &0
5 10 15 0 25 30 35 0 5 1 '15 20 25 30 35
Water temperature (°C) Water temperature (°C)
March Se Pte Mbe r
0,2 0,2 T
2.0 2, O
1
4.0 � 4-U
.[ _D
8.0
0 5 10 '15 20 25 30 35 0 5 10 15 20 25 ;. 0 35
Water temperature (°C) Water temperature (°C)
pri I 2 October
0.2 ■ o,
k
■
, + 2.0 11
0 d0 '
. } 8. C)
C 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35
Water temperature (°C) Water temperature (°C)
0,2 i ;, 0,2
E 2, E 2,0
4.0 4,0 a
-yy C r
.l? Q .0
i
8, �+��yF 8,0-
P
0 5 10 15 20 25 30 35 0 6 10 15 20 25 '10 35
Water temperature (°C) Water temperature (°C)
June December
0.2 � r� 0,2-
E .0 # E O
4.0 4.0
CL CL
T T 8.0 L
5 10 15 20 25 :_ 0 :_r 0 5 10 15 20 25 30 3
Water temperature (°C) Water temperature (°C)
Station BFB2 Station BFD2------- Station BFF2— — — - Station BFH2
Figure 5-19 Monthly water temperature profiles in Blewett Falls Lake during 2004.
5-61

Section 5
E
i.i
E
January
0,2
■
2.0 ti
■
4.0
6.0 ■
■
8.0
0 2 4 B 8 12 14 1
Dissolved oxygen (mg/L)
February
0
2.0
4. C-
G. 0 G.0 �
i
0 2 4 6 8 1 12 14 1
Dissolved oxygen (mg/L)
March
0-2
•
2.0
F
.0 F
6.0 ■
8.0
0 2 4 8 10 12 14 16
Dissolved oxygen (mg/L)
.April
0,2
2.0
4.0
6.0
0 2 4 G 8 '10 12 14 1
Dissolved oxygen (mg/L)
May
R
2.0 r
r
4.0
6.0
.0
0 2 4 (; 8 10 '12 14 10
Dissolved oxygen (mg/L)
,luno
0.2 1 F I _i
E
CL
0
E
CL
0
a
20O
4.0CL
Results and Discussions
July
I{{I���'
.2-
/'f� 4 I
4
L-0 -
4-0-
6.0,
-6.0 +
8.01 -
0 2 4 C) 8 10 12 '14 '1 G)
Dissolved oxygen (mg/L)
August
0. - -F_
2.0-"
r
.0 r
8.0-1
2 4 6 8 10 12 14 1
Dissolved oxygen (mg/L)
September
0.2 f
■
2-0
4-0
r
-0 '
8.0
0 2 4 8 10 12 14 16
Dissolved oxygen (mg/L)
October
0.2 �r
2-0
4-0
e
-0
,0
C) 2 4 9 10 12 14 16
Dissolved oxygen (mg/L)
November
0.2
2, 0
4.0
,
8.■
0
o � .
0 2 4 r � 10 12 -14 16
Dissolved oxygen (mg/L)
Der,ernher
0.2
2.0
4,0
.0
8,0
0 2 4 6 8 10 12 14 16 0 2 4 6 8 10 12 14 1
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
Station BF132 Station BFD2------- Station BFF2- - - - Station BFI -12
Figure 5-20 Monthly DO profiles in Blewett Falls Lake during 2004.
5-62

Section 5
Results and Discussions
0-2 1: January 0.2 Ju ly
E 2.0 E 2.0
4.0 4-0
6-0 6.0
0 5 '10 15 20 25 30 35 0 5 10 '15 20 25 30 � �}
Water temperature (°C) Water temperature (°C)
February August
0.2 0.2 ' 1
E 2.0 E 2.0"
�// r }
= 4.0 I 4-0 ,f
1CL
(1) - (1) 6.0
0 0 '
&0 `` .0
0 5 10 '15 20 25 �0 35 o 5 10 15 20 25 30 35
Water temperature (°C) Water temperature (°C)
Isla re h September
0.2 0.2 I
.� 2.0 2.0.
4.0 4-0
CL CL
p $_0 8.0
0 5 110 15 20 25 30 35 0 5 10 '15 20 25 30 35
Water temperature (°C) Water temperature (°C)
Agri I October
0.2 I 0.2
2.0 ':� 2.0
E E
4.0 s4.0-
6,0
.[ ,i
w 6.0-
8_0
.0 g0 D
8.0}
0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35
Water temperature (°C) Water temperature (°C)
I1by November
0.2 O.2�
2.0 % 2.0-
4,0
.0 4.0 ' ' s 4.0-
6,0 �.' .0
o 8.0 EI.0 -
0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35
Water temperature (°C) Water temperature (°C)
June December
0-2 � 0-2
2.0 2.0
s 4.0 s 4.0
a�
_06.0
8.0.o
5 10 15 20 25 30 35 0 5 10 15 20 25 30 35
Water temperature (°C) Water temperature (°C)
Station BFB2 - - - - - - - Station BFF2 - - - -Station BFH2
Figure 5-21 Monthly water temperature profiles in Blewett Falls Lake during 1999.
5-63

Section 5
Results and Discussions
0-2 January 1 02 July
2,0 2.oE E
4.0 s 4.0
C CL 6,0 6.0
(1)
0 2 4 d 10 '12 14 16' 0 2 4 G 8 '10 12 14 1G
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
February August
0.2 0.2
E 2.0 2.0
4-0 s 4.0
oCL
6.0 6.0
0 2 4 6 10 12 14 16 -2 4 6 8 '1 12 14 16
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
March Septemb -or
0-2 0.2
2-0 2.0
4,0 s 4.0
6,0 6.0
8.0 8.0
0 2 4 G 8 10 12 '14 16 2 4 6 8 1 '12 '14 10
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
April October
0.2 - 02
2-0 2.0
E E
4,0 f 4.0
CL
6,0
6.0
8.0-
0 2 4 (3) B 10 '12 '14 16 0 2 4 G 8 1 12 14 16
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
Ifty November
0-2 0,2-
2.0 2.0
E E
4-0 4,0
6-0 6.0
8.0 o .0
0 2 4 6 8 10 12 14 16 0 2 4 63 '10 '12 '14 16
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
June December
0.2 0-2
2.0 2.0
4.0 4-0
CL 6.0 CL 6.0
C 8.0 08.0
2 4 5 8 10 12 14 16 0 2 4 G 8 10 12 14 16
Dissolved oxygen (mg/L) Dissolved oxygen (mg/L)
Station BFB2 ------- Station BFF2 - - - - Station BFH2
Figure 5-22 Monthly DO profiles in Blewett Falls Lake during 1999.
5-64

Section 5
Results and Discussions
January July
0.2 0.2-
E 2.0 E ZO P
4.0 4.0 -
CL CL
6.0 a 6.0-
0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35
Water temperature (OC) Water temperature (OC)
February August
0.2 0.2
E 2.0 E 2-0
4.0 4.0
CL CL
Q 6.0 Q 6.0
8.0 8.0
5 10 15 20 29 30 35 0 5 10 15 20 25 30 35
Water temperature (OC) Water temperature (OC)
March September
0.2 0,2
E
2.0 2-0 E
4.0 s 4.0
6.0
CL 6 -0
8,0 8.0
0 5 10 1,5 20 25 30 35 a 5 10 15 20 25 30 35
Water temperature (OC) Water temperature (OC)
0,2- April 0-2 Ootober
E
%..Wo 2.0- 2-0
4.0
Q.]CL
6,0 Q6.0
&0
0 5 1 cry 15 20 25 30 3 5 0 5 10 15 20 25 3G 35
Water temperature (OC) Water temperature (OC)
huy November
02
I
2.0 202
,0
E X E
4-0
CL 6-0 CL 6.0
8-0 D 8,0
0 5 1 15 20 2�) 30 35 0 5 10 15 20 25 3D 35
Water temperature (OC) Water temperature (OC)
June December
0.2 1: 0.2
2.0 ZO
E E
4.0 14. U
1-1 cL 1-1
CL 6.0 6.0
8.0 Q 8.0
0 5 1, 15 20 25 no 35 0 5 10 15 20 25 30 35
Water temperature (OC) Water temperature (OC)
Station BFB2 ------- Station BFF2 - - - - Station BFH2
Figure 5-23 Monthly water temperature profiles in Blewett Falls Lake during 2001,
5-65

Section 5
January
0, I
,04-0
i
4.0
C 6.0
8.0
Dissolved oxygen (mg/L)
February
0.
, 0 I 1
1
.
4.0 1
i.i
0
6,0
8.0
Dissolved oxygen (mg/L)
rVb rr, h
0,
E ,0
1
� I
s 4,0
� 1
6,0
D ,0 .
a
0 2 4 6 3 10 1. '14 1
Dissolved oxygen (mg/L)
April
0.2 E .0
s 4.0
1-1
C 6,0 ;
o
8.o-
0 2 4 6 8 '10 '12 14 1
Dissolved oxygen (mg/L)
lVbY
0-2
4.0
C 6.0
,0
0 2 4 € i 10 12 14 1
Dissolved oxygen (mg/L)
June
0, r
2.0
4,0
F
6,0 "r .
0 2 4 G 3 '10 '1. '14 1
Dissolved oxygen (mg/L)
Results and Discussions
July
0, l
.0
4,0-
CL
,0C .0 -
s
Dissolved oxygen (mg/L)
August
0.
i
E 2.0 f'
4.0 - r
.0 �.
8.0
4 G 8 1 '1 '14 16
Dissolved oxygen (mg/L)
pternber
0.2 ark
E 2.0"r !
4.0CL
(1)
I
Dissolved oxygen (mg/L)
October
0.
2.0-
4.0-
6,0-
8.0-
6 04.0 ,0.
r
0 2 4 6 8 10 1 '14 1
Dissolved oxygen (mg/L)
November
0_
,0 -
s _J
,0 r
Dissolved oxygen (mg/L)
December
0_
1
2.
yy0yyy '
^/ &+_
i
C ,0
Dissolved oxygen (mg/L)
Station BFB2 - - - - - - -Station BFF2 — — — —Station BFH2
Figure 5-24 Monthly DO profiles in Blewett Falls Lake during 2001.
5-66

Section 5 Results and Discussions
In the middle and lower reservoir areas, the water column was uniformly mixed and free-circulating
during January through April and again during September through December (Figures 5-19, 5-21,
and 5-23). Temperature stratification usually occurred in the reservoir during May through August,
although thermal stratification was weak and subject to turnover depending upon power plant
operations and the amount of river inflow. During 1999, thermal stratification existed in May and
June; de-stratification and water column turnover occurred in July and only a weak thermocline
existed in August (Figure 5-21).
Temperature stratification was weakto nonexistent in Blewett Falls Lake during 2001 (Figure 5-23).
One exception was the temperature stratification and DO depletion that occurred in the reservoir
during November 2001 (Figures 5-23 and 5-24). This stratification was related to the drawdown of
Lake Tillery for dam tainter gate inspection and maintenance during September 2001 (Figure 5-4).
Consequently, there was infrequent power generation from both Tillery and Blewett Falls
Hydroelectric Plants with subsequent low inflow into Blewett Falls Lake and lower lake levels from
September through November (Figures 5-4 to 5-6). These conditions, along with the eutrophic
nature of Blewett Falls Lake, were likely responsible for the temperature stratification and DO
depletion that occurred during November 2001. During 2004, temperature stratification occurred
during May with temperature differences of 4.1° and 5.2°C from the surface to bottom waters at
Stations BFF2 and BF132, respectively. Stratification continued from June through August although
it was weaker during these months when compared to May (Figure 5-19).
Dissolved oxygen depletion was more evidentthan temperature stratification in Blewett Falls Lake.
Dissolved oxygen concentrations were less than 4 mg/L at the intake structure depth (6 to 10 m)
beginning in May or June and remained below 4 mg/L through August or September of 1999, 2001,
and 2004 (Figures 5-20, 5-22, and 5-24). The occurrence of DO depletion in September or other fall
months (e. g., November 2001) was related to the frequency of precipitation events within the river
basin and subsequent inflow and power plant generation levels. A strong clinograde curve was
usually observed with DO concentrations declining rapidly from 2 to 6 m, depending upon the
location. Low DO concentrations of 2 mg/L or less were usually only found at depths of 2 to 3 m
from the reservoir bottom. Blewett Falls Lake also did not have a very large volume of anoxic water
(DO < 2 mg/L) present during the temperature stratification period as observed at Lake Tillery.
5.3.4 Pee Dee River Reach below the Blewett Falls Hydroelectric Plant
5.3.4.1 Spatial and Temporal Trends in Reach 2 Water Chemistry during Power Plant Generation
and No Power Generation Periods
The water quality of the immediate downstream area of this river reach (below Station BF1B atU.S.
Highway 74) resembled the water quality characteristics of Blewett Falls Lake due to the shallow
depth of the power plant intake and the well-mixed water column during most of the year. With
increasing distance from the power plant, water quality characteristics were more influenced by
physiographic topography changes, watershed inflow, natural inputs of organic matter, and point and
nonpoint discharge sources. Reach 2 transitioned from the Piedmont Fall Line zone into the
Sandhills and Coastal Plain physiographic regions with changes in several physical features
including channel gradient, substrate and soil properties, and land use patterns.
5-67
Section 5 Results and Discussions
Table 5-20 Means, ranges (in parentheses), and spatial trends of selected water
chemistry parameters from the surface waters in Reach 2 of the Pee Dee
River below the Blevvett Falls Hydroelectric Plant during power generation
flows, 2004.
Parameter'^z
BFOB
BF1B atanon
BF2B
BOB
BF4B
Temperature (EC) 17.8 18.1 18.0 18.3 18.3
(6.8-28.7) (7.0-29.5) (6.8-30.2) (5.9-30.4) (7.2-30.5)
Dissolved oxygen (mg/L) 9.0 8.3 9.5 9.1 8.2
(5.7-12.5) (4.4-13.1) (6.4-13.9) (6.7-12.9) (3.1-11.5)
Solids (MgL)
Total solids 94°` 93- 87` 102"° 112°
(74-108) (67-119) (51-139) (84-132) (81-148)
Total dissolved 71` 71be 79b 893 91a
(56-103) (52-103) (64-110) (64-110) (73-108)
16ab 12b l lb 15ab 20a
Total suspended (8-34) (6-20) (3-26) (6-25) (9.8-41)
Turbidity (NTL17 8 8 5 19 24
2
(2 2
32) (2.1
3) (1.4
2) (1.5
-47) (
/1.9-52)
Nutrients (Mg/L)
Total nitrogen 0.65 0.62 0.54 0.52 0.56
(0.35-1.5) (0.35-1.8) (0.33-1.3) (0.37-0.92) (0.43-1.10)
Ammonia-N 0.03 0.05 0.04 0.03 0.03
(< 0.02-0.08) (< 0.02-0.13) (< 0.02-0.09) (< 0.02-0.07) (< 0.02-0.10)
Nitrate + nitrite-N 0.56 0.60 0.61 0.63 0.61
(0.08-1.0) (0.27-1.0) (0.16-1.0) (0.34-0.91) (0.24-0.96)
Total phosphorus 0.068' 0.072' 0.067' 0.080b 0.095"
(0.049-0.087) (0.047-0.099) (0.036-0.157) (0.054-0.173) (0.036-0.159)

Total organic carbon (mg/L) 3
.2 b
3.3 b
3.4b
4. la
4.7 a
(2.4-4.7) (2.6-4.7) (2.6-6.3) (3.0-8.0) (3.0-11)
Chemical oxygen demand 7.3 6.6 6.6 9.5 12
(mg/L) (< 10-13) (< 10-13) (< 10-16) (< 10-21) (< 10-31)
Biological oxygen demand < 2 < 2 < 2 < 2 < 2
(lug/L) (< 2-2.6) (< 2-2.2)
Calcium 5.4 5.2 5.2 5.1 5.3
(1.7-6.5) (1.6-6.6) (2.2-7.0) (2.3-6.5) (2.1-7.0)

Magnesium 2.3 2.4 2.3 2.3 2.5
(< 1.0-2.9) (< 1.0-3.0) (< 1.0-3.0) (< 1.0-3.1) (< 1.0-4.5)
Sodium 6.8b 6.9b 7.3' 10a 12a
(5.2-8.4) (4.9-8.8) (5.1-9.0) (7.0-17) (8.1-21)
Chloride 9.8C 9.8` 12b° 14ab 17a
(7.1-12) (7.2-12) (8.1-22) (10-21) (8.0-50)
Sulfate 5.9° 6.5` 6.8° 8.4b 9.8a
(< 2.0-7.3) (5.2-8.1) (5.5-8.9) (5.4-12) (6.3-15)
Hardness (calculated)3 23 22 22 22 23
(4.2-27) (19-28) (5.5-30) (5.8-27) (5.3-36)
100' 99b 99b 118a 1253
Specific conductance ((DS/cm) (90-109) (90-115) (78-113) (99-151) (98-182)
Total alkalinity' 22b 22b 21b 233' 24a
(18-26) (17-25) (15-25) (19-29) (17-32)
H
p 7.5 7.4 7.6 7.4 7.3
(7.1-8.1) (6.7-7.9) (7.1-8.6) (6.9-8.0) (6.8-7.8)
5-68
Section 5 Results and Discussions
Parameter's^Z
Station
BFOB BF1B BF2B BF3B BF4B
Trace elements (Oga/L)
Aluminum 449 436 356 479 1,026
(199-746) (144-792) (87-560) (216-864) (292-5,320)
Copper 2.5" 2.4b 2.4' 2.8a' 3.2a
(1.5-4.0) (1.5-3.4) (1.5-4.6) (1.5-4.4) (1.9-5.1)
Mercury < 0.2 < 0.2 < 0.2 < 0.2 < 0.2
(< 0.2-0.2)
1 Sample size (n) equaled 12. Less than values (<) indicate the Lower Reporting Limit (LRL) for the parameter. The
LRL is a statistically determined limit beyond which chemical concentrations cannot be reliably reported. Statistical
analyses were utilized only when mean concentrations were above the analytical lower reporting limits. Missing
range values indicate that all measured values during, were less than the LRL for that parameter.
2 Fisher's protected least significant difference (LSD) test was applied only if the overall ANOVA F test for the
treatment was significant. Means followed by different superscripts were significantly different (P # 0.05). Data
were rounded to conform to significant digit requirements. Rounding may obscure mean differences.
3 Total alkalinity units are mg/L as CaCO3 and hardness is calculated as mg equivalents CaCO3/L.
5-69
Section 5 Results and Discussions
Waters of Reach 2 were slightly acidic to slightly basic in pH, moderately soft, and with low
buffering capacity during the survey period of 1999, 2001, and 2004 (Table 5-20). Water quality
characteristics in the immediate tailwaters (Stations BFOB and BF1B) essentially mirrored the water
quality in Blewett Falls Lake because of the short hydraulic retention time of the reservoir
(Tables 5-14, 5-20, and 5-21). However, there were some significant changes in water quality with
increasing distance from the power plant which suggested other factors, including point and
nonpoint discharges, influenced water quality in Reach 2, particularly below Station BF213 located
approximately 23 miles downstream. During power generation flows in 2004, there were significant
increases in solids constituents, total phosphorus, total organic carbon, sodium, chloride, sulfate,
specific conductance, total alkalinity, and copper from the power plant tailwaters to the Coastal Plain
of South Carolina (Stations BF313 and BF413) (Table 5-20). No significant differences were found
for total nitrogen, ammonia-nitrogen, nitrate + nitrite-nitrogen, calcium, magnesium, hardness,
aluminum, or pH during power generation flows in 2004. Similar spatial differences were found for
these same water quality parameters during the survey period of 1999, 2001, and 2004 (Table 5-21).
A paired t-test comparison of power generation and no power generation flow periods at Stations
BF 1 B and BF213 during 2004 indicated few significant differences among water quality parameters
between the two flow periods (Table 5-22). At Station BF113, total solids, turbidity, and aluminum
were significantly greater during the power generation period than during the no power generation
period. At Station BF213, total suspended solids, ammonia-nitrogen, and aluminum were
significantly greater during the power generation period. These results suggested the main effects of
flow releases from the Blewett Falls Hydroelectric Plant were increased concentrations of total
solids, turbidity, and aluminum in the immediate tailwaters. Solids, turbidity, and aluminum loading
in the watershed were driven by nonpoint source sediment inputs into the river, especially upstream
of the Blewett Falls Development during high precipitation and inflow events.
Temporal analysis of the surface waters at Stations BF 113, BF213, BF313, and BF413 for the years
1999, 2001, and 2004 indicated significant differences in water quality parameters during the lowest
flow year of 2001 when compared to the higher flow years of 1999 and 2004 (Table 5-23 and
Figures 5-3 and 5-6). Total solids, total dissolved solids, ammonia-nitrogen, total phosphorus, total
organic carbon, COD, all anions and cations, total alkalinity, and specific conductance were
significantly greater during the lowest inflow year of 2001 when compared to 2004, a wetter year
(Table 5-23). Conversely, total suspended solids, turbidity, nitrate + nitrite-nitrogen, pH, and
aluminum were significantly greater during 2004. Mean values for most of these parameters for the
year 1999 were usually intermediate in statistical ranking; either grouped with 2001 or 2004
depending upon the parameter. Total nitrogen was the only water chemistry parameter that did not
significantly differ among the three years.
Monthly trends of concentrations of nutrients, solids, and turbidity measured at Station BFB2 in
Blewett Falls Lake (bottom waters) and at Stations BFOB, BF1B, BF213, BF313, and BF413 in Reach
2 during 2004 are presented in Appendix F. All of these data were collected under power generation
flow conditions so data were comparable from station to station. This comparison examined the
cumulative effects of nutrient and solids from Blewett Falls Lake into the downstream reach of the
Pee Dee River. As mentioned previously, Stations BFOB and BF 1B essentially mirrored the water
5-70
Section 5 Results and Discussions
Table 5-21 Comparison of temporal trends of annual means for selected water
chemistry parameters from the surface waters at Station BFB2 in Blewett
Falls Lake and surface waters at Stations BF1B, BF213, BF313, and BF413 in
the Pee Dee River below the Blevvett Falls Hydroelectric Plant during 1999,
2001, and 2004.
Station
Parameter'
BFB2 BF1B BRB BF3B BF4B
Temperature (°C) NA2 18.6 18.8 19.0 18.8
Dissolved oxygen (mg/L) NA2 8.3' 9 8a 9 0ab 8.4 b
Solids (mg/L)
Total solids 96' 95b 9lb 116a 12 la
Total dissolved 88b 83b 88b 104a 105a
Total suspended 8.9°d 9.6b` 6.4d 12b 18a
Turbidity (NTU) 14' 16b 13b 16b 22a
Nutrients (mg/L)
Total nitrogen 0.56 0.51 0.42 0.61 0.64
Ammonia-N 0.06 0.09 0.05 0.07 0.06
Nitrate + nitrite-N 0.40 0.49 0.48 0.47 0.45
Total phosphorus 0.078b 0.076' 0.074b 0.087b 0.1172
Total organic carbon (mg/L) 4.2b 4.Ob 4.0b 5.1a 5.7a
Chemical oxygen demand 12 13 13 14 15
Ions (mg/L)
Calcium 6.08 5.7ab 5.4' 5.4b 52'
Chloride 12' 12b 13' 168 16a
Magnesium 2.6 2.6 2.4 2.4 2.4
Sodium 12a 12a 12a 18' 18b
Sulfate 10' 9.8b 9.7b 13a 12a
Total alkalinity' 28ab 26 be 25` 30a 28ab
Specific conductance ((DS/cm) 123b 12 lb 120b 153a 145a
nH NAZ 7.1 ab 7.2a 7.1 ab 7.0'
Trace elements (Og/L)
Aluminum 261b 370' 287' 387b 626'
Copper 2.9 3.0 2.3 3.2 3.4
1 Statistical analyses were utilized only when the majority of parameter concentrations were above the analytical
lower reporting limits. Fisher's protected least significant difference (LSD) test was applied only if the overall
ANOVA Ftest for the treatment effect was significant. Means followed by different superscripts were significantly
different (P # 0.05). Data were rounded to conform to laboratory reporting limit requirements. Such rounding may
obscure mean differences. Sample size= 12 for each year. The power generation flow data set in 2004 was used in
this analysis.
2 Station BFB2 was not included in the statistical analysis of this parameter.
3 Total alkalinity units are mg/L as CaCO3.
5-71
Section 5 Results and Discussions
Table 5-22 Means, ranges (in parentheses), and spa tial trends of selected water
chemistry parameters from the surface waters at Sta tions BF113 and BF213 in
Reach 2 of the Pee Dee River below the Blewett Falls Hydroelectric Plant
during the no power generation and power generation flow periods, 2004.
Station
Parameter' 2 BF1B BF1B MB MB
No Power Power No Power Power
Generation Generation Generation Generation
Temperature (EC) 17.5 18.1 18.5 18.0
(65-27.6) (7.0-29.5) (7.7-31.1) (6.8-30.2)
Dissolved oxygen (mg/L) 7.9 8.3 9.7 9.5
(3.3-12.5) (4.4-13.1) (7.4-12.7) (6.4-13.9)
Solids (mg/L)
82
Total solids 93 82 87

(
)
66-104
(
)
67-119
(
)
58-107
(
)
51-139
Total dissolved 6 71 73 9
(59-108) (52-103) (57-106) (64-110)
Total suspended 8.4 12 5.56 l la
(1.5-27) (6.2-20) (1.7-12) (3.2-26)
Turbidity (NTLD 116 18a 10 19
(0.6-19) (2.1-33) (0.7-19) (1.4-52)
Total nitrogen (0.27-1.2) (0.35-1.8) (0.30-1.0) (0.33-1.3)

Ammonia-N 0.04 0.05
(<0.02- 0.016 0.04a
(< 0.02-0.11)
0.13) (<0.02-0.05) (<0.02-0.09)
Nitrate +nitrite-N 0.60 0.60 0.57 0.61
(0.31-1.0) (0.27-1.0) (0.06-0.98) (0.16-1.0)

Total phosphorus 0.060 0.072
0
( 0.058 0.067
(0.037-0.084) 99)
0 ( (0.028-0.090) (0.036-0.157)
Total organic carbon 3.2 3.3 3.5 3.4
(mg/L) (2.4-4.3) (2.6-4.7) (2.5-5.0) (2.6-6.3)
Chemical oxygen demand (mg/L) <10
(< 10-11) < 10
(< 10-13) <10
(< 10-16) <10
(< 10-16)
Biological oxygen demand (mg/L) < 2 (< 2 2 2) < 2 < 2
Calcium 5.0 5.2 5.0 5.2
(3.2-6.5) (1.6-6.6) (3.1-65) (2.2-7.0)
Magnesium 2.2 2.4 2.2 2.3
(< 1.0-3.1) (< 1.0-3.0) (< 1.0-2.8) (< 1.0-3.0)
Sodium 6.6 6.9 7.1 7.3
(4.9-10) (4.9-8.8) (5.2-9.0) (5.1-9.0)
Chloride 9.7 9.8 10 12
(7.2-12) (7.2-12) (7.7-13) (8.1-22)
Sulfate 6.8 6.5 7.0 68
(5.0-8.0) (5.2-8.1) (5.1-11) (5.5-8.9)
Hardness (calculated)3 22 22 1 22
(8.0-27) (3.9-28) (7.7
27) (5.5
-30)
Specific conductance ((DS/cm) (89.911) (90-99 115) (889$05) (789913)
Total alkalinity3 0 22 0 21
(11-25) (17-25) (12-24) (18-25)
H
p 7.4 7.4 7.7 7.6
(6.9-7.9) (6.7-7.9) (7.0-9.2) (7.1-8.6)
5-72
Section 5 Results and Discussions
Station
Parameter' 2 BF1B BF1B BFZB B12B
No Power Power No Power Power
Generation Generation Generation Generation
Trace elements (Og/L)
272 436a 245 356a
Aluminum (107-762) (144-792) (97-412) (87-560)
Copper 2.3 2.4 2.1 2.4
(1.6-3.0) (1.5-3.4) (1.4-3.0) (1.5-4.6)
Mercury < 0.2 < 0.2 <0.2 < 0.2
1 Sample size (n) equaled 12. Less than values (-) indicate the Lower Reporting Limit (LRL) for the parameter. The
LRL is a statistically determined limit beyond which chemical concentrations cannot be reliably reported. Statistical
analyses were utilized only when mean concentrations were above the analytical lower reporting limits. Missing
range values indicate that all measured values during, were less than the LRL for that parameter.
2 A paired t-test was applied only to each station to compare the no power generation and power generation periods.
Means within each station that have different superscripts were significantly different (P # 0.05). Data were rounded
to conform to significant digit requirements. Rounding may obscure mean differences.
3 Total alkalinity units are mg/L as CaCO3 and hardness is calculated as mg equivalents CaCO3/L.
5-73
Section 5 Results and Discussions
Table 5-23 Comparison of temporal trends of annual means for selected water
chemistry parameters at Stations BF113, BF213, BF313, and BF413 of Reach 2
of the Pee Dee River below the Blewett Falls Hydroelectric Plant for 1999,
2001, and 2004.
Year
Parameter)
1999 2001 2004
Temperature (BC) 19.0 19.3 18.2
Dissolved oxygen (mg,I) 8.4 9.4 8.8
Total solids 101° 118a 991,
Total dissolved 92b 110a 83`
Total suspended 12a 8.2b 143
Turbidity (NTq 19a 12b 20a
Ammonia-N 0.072 0.09a 0.04
Nitrate + nitrite-N 0.38b 0.43' 0.61a
Total nitrogen 0.60 0.46 0.56
Total phosphorus 0.079b 0.108a 0.078b
Total organic carbon (mg/L) 4.8a 5.4a 3.9b
Chemical oxygen demand 15a 17a 8.7b
Calcium 4.9b 6.23 5.2b
Chloride 12b 18a 13b
Magnesium 2.3b 2.63 2.4b
Sodium 16b 20a 9.1
Sulfate 8.5b 17a 7.9b
Total alkalinity (mg/L as CaCO3) 27b 33a 22°
Specific conductance ((DS/cm) 128b 1662 110°
nH 6.9b 7.Ob 7.4a
Trace elements (1g E)
Aluminum 409x" 268' 574a
Copper 3.7a 2.5b 2.7b
1 Statistical analyses were utilized only when the majority of parameter concentrations were above the analytical
lower reporting limits. Fisher's protected least significant difference (LSD) test was applied only if the overall
ANOVA F test for the treatment effect was significant. Means followed by different superscripts were significantly
different (P # 0.05). Data were rounded to conform to laboratory reporting limit requirements. Such rounding may
obscure mean differences.
5-74
Section 5 Results and Discussions
quality conditions in Blewett Falls Lake (Station BFB2) as seasonal trends of all of these parameters
were similar among the three stations (Figures F-1 to F-9). With increasing distance downstream,
monthly trends began to deviate and the magnitude of difference suggested that either the lag affect
of flow travel time from upstream areas and/or point and nonpoint sources within the watershed
were influencing these parameters. Total solids, total dissolved solids, total phosphorus, and total
organic carbon also significantly increased at the lowermost downstream Stations BF313 and BF4B
(Table 5-20 and Figures F-1, F-2, F-8, and F-9).
5.3.4.2 Relationships between Water Quality and Flow in Reach 2 of the Pee Dee River
Water quality stations within Reach 2 of the Pee Dee River were divided into two segments for the
Kendall's tau b correlation analysis of daily average flow vs. water quality parameters. Stations
BF 1 B and BF213 were grouped into the Blewett Falls tailwaters and Stations BF313 and BF4B were
grouped into the lower Pee Dee River (Table 5-19). This grouping was made due to increasing flow
contributions with a larger watershed downstream of the hydroelectric plant. Additionally, the
ANOVA indicated that other factors, including anthropogenic related point and nonpoint sources,
were influencing the water quality at these lowermost stations. Daily average flow estimates were
obtained from nearby USGS gaging stations (i.e., Rockingham, Bennettsville, and Pee Dee gages).
In the case of Station BFB2, the USGS Rockingham gage data were used, and flow was adjusted
based on the average flow (cfs) per square mile between the gage and the water quality station.
The correlation analysis showed similar correlations between flow and water quality parameters in
both segments of Reach 2 with afew exceptions (Table 5-19). In the Blewett Falls tailwaters, there
were significant negative correlations between flow and water temperature, specific conductance,
ammonia-nitrogen, total alkalinity, magnesium, sodium, chloride, and sulfate. The correlations
indicated the greater the flow, the less the concentration or measurement of the parameter or vice-
versa. Similar significant negative correlations existed for flow and these water quality parameters
in the lower Pee Dee River (Table 5-19) except that correlations for total solids, total dissolved
solids, COD, total phosphorus, and total organic carbon were also significant at this segment while
the correlation with magnesium was not significant. During lower flow conditions, especially
conditions associated with drought, there were increases in most anions and cations in the both
sections of Reach 2 and, correspondingly, increases in total dissolved solids, total alkalinity, and
specific conductance. Nutrient constituents total phosphorus, total organic carbon, and ammonia-
nitrogen (Blewett Falls tailwaters section only) can also be expected to increase under these low
flow conditions. Under higher flow conditions, these parameters can be expected to decrease.
Weak to moderately significant positive correlations were found between flow and DO, total
suspended solids, turbidity, nitrate +nitrite-nitrogen, and aluminum in both Reach 2 sections except
that the DO correlation was not significant in the lower Pee Dee River (Table 5-19). Therefore,
concentrations of these parameters can be expected to increase with increased flows in the river and
decrease with lower flows.
5.3.4.3 Spatial and Temporal Trends in Temperature, DO, PH, Specific Conductance, and
Turbidity in Reach 2 during Power Generation and No Power Generation Periods
Water temperatures showed a seasonal progression in Reach 2 with lowest temperatures from 6' to
9'C during January or February and summertime maxima from 29' to 32'C during July or August
5-75
Section 5 Results and Discussions
during 1999, 2001, and 2004 (Figures 5-25 to 5-27). Maximum water temperatures in Reach 2 did
not exceed the North Carolina water quality standard (32.0°C). There were no significant spatial or
temporal differences in mean water temperatures during 2004 or for 1999, 2001, and 2004 combined
(Tables 5-20, 5-21, and 5-23). Furthermore, there were no significant differences in mean water
temperatures between the power generation and no power generation periods during 2004
(Table 5-22).
The DO regime in Reach 2 exhibited a seasonal pattern of greater DO concentrations in the cooler
winter and fall months and DO minima during the warmer summer and early autumn months
(Figures 5-25 to 5-27). There were instances where DO concentrations were below 4.0 mg/L or
5.0 mg/L during 1999, 2001, and 2004 at Station BF 1B and Station BF413 (Appendix B, Tables B-4
to B-6). No DO concentrations were below 5.0 mg/L at Stations BF213 and BF313 during this three-
year period. At Station BF113, DO concentrations below 5.0 mg/L were noted in August of 1999
(4.4 mg/L) and August 2001 (4.8 mg/L). Additionally, DO concentrations below 5.0 mg/L at Station
BF1B were observed during the power generation and no power generation periods during June
through August of 2004. In July, the DO concentration at Station BF1B was below the North
Carolina instantaneous water quality standard (i.e., 3.3 mg/L). The DO concentration at Station
BF413 was 3.1 mg/L during September 2004 (Figure 5-27). The DO concentration at Station B17313,
located upstream of Station BF413, was 7.0 mg/L on this same date. This low DO event may have
been related to anthropogenic effects or tributary inflow of low DO swamp water.
In 2004, there were no significant differences in mean DO concentrations among stations in Reach 2
during the power generation and no power generation periods (Tables 5-20 and 5-22). Mean DO
concentrations did significantly differ among stations when data from all three survey years were
combined (Table 5-21). The mean DO concentration was significantly greater at Station BF213 than
at Stations BF 1B and BF413 (Table 5-21). There were no significant temporal differences in mean
DO concentrations among years (Table 5-23).
Peak values of specific conductance were observed in the summer months, and there was more
variability in values at Stations BF313 and BF413 during the lower flow years of 1999 and 2001
(Figures 5-25 to 5-27). Mean specific conductance values were significantly greater at Stations
BF313 and BF413 than at the upstream Stations BFOB, BF 113, and BF213 during 2004 and for the
1999, 2001, and 2004 period which suggested point source discharges were influencing water
quality at these downstream stations (Tables 5-20 and 5-21). Temporal differences were also found
among years with significantly greater mean specific conductance values during the lower flow
years of 1999 and 2001 when compared to the higher flow year of 2004 (Table 5-23). There were no
significant differences in mean specific conductance values between the power generation and no
power generation periods at Stations BF1B and BF213 during 2004 (Table 5-22).
5-76
Section 5
Results and Discussions
40
30
O 20
0 10
0
14
12
10
J 8
°
E 6
4
2
0
Temperature
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Dissolved oxygen
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Specific conductance
400
E 300
N 200
= 100
0
9
8
x 7
6
5
4
60
50
40
30
Z 20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
pH
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
iu
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Station BF1 B - Station BF213 Station BF313 Station BF4B
Figure 5-25 Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations BF1B, BF2B, BF3B, and BF4B in Reach 2 of the Pee
Dee River below the Blewett Falls Hydroelectric Plant during 1999.
5-77
Section 5
Results and Discussions
40
30
V 20
10
0
14
12
10
J 8
°
E 6
4
2
400
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
VIJJVIVCY
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Specific conductance
E 300
N 200
= 100
0
9
8
x 7
6
5
A
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
pH
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
60
50
40
30
Z 20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
-Station BF1B -A-Station BF213 -Station BF313 - Station BF4B
Figure 5-26 Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations BF1B, BF2B, BF3B, and BF4B in Reach 2 of the Pee
Dee River below the Blewett Falls Hydroelectric Plant during 2001.
5-78
Section 5
Results and Discussions
40
30
0 20
10
0
14
12
10
J 8
O 6
4
2
0
Temperature
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Dissolved oxygen
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Specific conductance
400
E 300
N 200
? 100
0
s
a
x 7
a 6
5
4
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
pH
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
60
50
40
30
Z 20
10
0
Turbidity
X
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Station BF1 B -A? Station BF213 Station BF313 - Station BF4B
Figure 5-27 Monthly trends in water temperature, DO, specific conductance, pH, and
turbidity at Stations BF1B, BF2B, BF3B, and BF4B in Reach 2 of the Pee
Dee River below the Blewett Falls Hydroelectric Plant during 2004. (Note:
Power generation data were plotted for all stations.)
5-79
Section 5 Results and Discussions
The pH values were fairly uniform and exhibited no seasonal trends during 1999 and 2004
(Figures 5-25 and 5-27); however, there was more variability in pH values during the lowest flow
year of 2001 (Figure 5-26). All monthly pH values collected in North Carolina waters during 1999,
2001, and 2004 met the water quality standards for pH (Appendix B, Tables B-4 to B-6; NCDWQ
2004a). There was only one instance of a monthly pH value (9.2 units) not meeting South Carolina
water quality standards and that occurred at Station BF2B during the no generation period in July
2004 (Appendix B, Table B-6). There were no significant differences in mean pH values among
stations during the power generation and no power generation periods during 2004 (Tables 5-20 and
5-22). There were significant differences in mean pH values among stations and among years for
the 1999, 2001, and 2004 period (Tables 5-21 and 5-23). The mean pH value at Station BF4B was
significantly lower compared to the other stations for 1999, 2001, and 2004, and the annual mean pH
value was significantly greater during the higher flow year of 2004.
Turbidity values were highly variable within each year and were mainly influenced by large scale
precipitation events and inflow within the river basin (Figures 5-25 to 5-27). No turbidity values at
Station BF1B were above the North Carolina water quality standard during the three year period
(Appendix B, Tables B-4 to B-6). There were only two occurrences of turbidity exceeding 50 NTU
in the lower reach Pee Dee River during 2004 (Figure 5-27 and Appendix B, Table B-6). There
were no significant differences in mean turbidity values among stations during the power generation
period in 2004 (Table 5-20). However, mean turbidity was significantly greater during the power
generation period than the no power generation period at Station BF1B during 2004 (Table 5-22).
Significant spatial and temporal differences occurred among mean turbidity values for years 1999,
2001, and 2004 (Tables 5-21 and 5-23). Mean turbidity values were greatest at Station BF4B
compared to the other stations (Table 5-21). The mean turbidity values for 1999 and 2004 were also
greater than the mean value for 2001 (Table 5-23).
5.3.5 Longitudinal Trends in Water Quality Parameters for Project Waters During
2004
Longitudinal trends in water quality parameters from the Lake Tillery headwaters (Station TYK2) to
the Coastal Plain of South Carolina (Station BF4B), including the Rocky River, were examined and
statistically tested to determine how water quality parameters changed as water passed through the
Project reservoirs and with additional inflow from tributaries within the watershed (Figures 5-28 to
5-30). This comparison was made for the monthly water quality data collected under power
generation flow conditions during 2004. All reservoir and tailwaters stations associated with the
Project were sampled during this year. Bottom water samples were used for Stations TYB2 and
BFB2 for Lake Tillery and Blewett Falls Lake, respectively. It should be noted that this analysis
only reflects longitudinal trends that existed under the flow conditions and climate patterns that
existed during 2004. These trends may or may not be similar during years with different flow and
climate conditions.
5-80
Section 5
Results and Discussions
60 Total Suspended Solids
a b be P < 0.0001 a abc abc cd
abc
cd c cd
cd

BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
Total Dissnlved Snlids
50
40
m 30
E
20
10
0
EE
aoo
a P < 0.0001
250
200
150

100 C C D'. T
50
0
BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 BF12B RR TY1B TYB2 TY K2
Station
Total Solids
E
300 a < 0-0001
250
200 b c

50 b be c be

100 C
50
0
100
e0
60
t
Z ao
20
0
600
500
E 400
Y 300
N
? zoo
100
0
BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
Turbiditv
a b P < 0.0001
be be
c be bcd cd be cd d
c

BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
Snecific Conductance
a P < 0.0001

b be cd cd cd bcd bcd bcd
d c

BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
Figure 5-28 Spatial trends (means and ranges) in solids constituents, turbidity, and
specific conductance in Lake Tillery, Blewett Falls Lake, and Reaches 1 and
2 of the Pee Dee River under power generation flow conditions during 2004.
(Note: Statistical results are given for each water quality parameter and
different letter superscripts indicate statistically different mean values.)
5-81
Section 5
Results and Discussions
1.00 Ammonia-N
0.80
0.60
m
E 0.40
0.20
0 00
P = 0.05 a

b b b b b ab b b b ab ab

BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
12 0 Nitrate+N itrite-N
10.0
8.0
m 6.0
E 4.0
2.0
00
a P < 0.0001

b b b b b b b b b b b

BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 BF12B RR TY1B TYB2 TY K2
Station
3.5
3.0
2.5
2.0
m
E 1.5
1.0
0.5
0.0
BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
1.200 Total Phosphorus
1.000
0.800
m 0.600
E 0.400
0.200
0 000
P < 0.0001

b

b b b b b b b b b b
f + ¦ ¦ i
BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
12.0
10.0
8.0
m 6.0
E
4.0
2.0
0.0
P < 0.0001
BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
Figure 5-29 Spatial trends (means and ranges) in nutrient constituents in Lake Tillery,
Blewett Falls Lake, and Reaches 1 and 2 of the Pee Dee River under power
generation flow conditions during 2004. (Note: Statistical results are given
for each water quality parameter and different letter superscripts indicate
statistically different mean values.)
5-82
Section 5
Results and Discussions
30.0 Calcium
25.0
20.0
m 15.0-
E 10.0
5.0
00
a < 0 -0001

b b b
b b b b

BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
10.0
8.0
6.0
m
E 4.0
2.0
0.0
BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 BF12B RR TY1B TYB2 TV K2
Station
50 Sodium
40
30
m
E 20
10
0
a P < 0.0001

b b
c c c c c c c c c
f •
BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TV 12B RR TY1B TYB2 TY K2
Station
80 Chloride
60
J
m 40
E
20
0
a
P < 0.0001
a c
c c c c c c c c c
IP IP a M • N
BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
30 Sulfate
25
E 20
Y 15
N
? 10
5
0
a P < 0.0001

b be
cd cd d cd d cd

BF4B BF3B BF2B BF1B BFOB BFB2 BFH2 TY 12B RR TY1B TYB2 TY K2
Station
Figure 5-30 Spatial trends (means and ranges) in anions and cations in Lake Tillery,
Blewett Falls Lake, and Reaches 1 and 2 of the Pee Dee River under power
generation flow conditions during 2004. (Note: Statistical results are given
for each water quality parameter and different letter superscripts indicate
statistically different mean values.)
5-83
Section 5 Results and Discussions
There were significant spatial differences in solids and nutrients constituents, anions and cations,
turbidity, and specific conductance (Figures 5-28 to 5-30). The only exceptions were total nitrogen
concentrations, which did not significantly differ from the upstream to downstream monitoring
stations (Figure 5-29).
Solids constituents and turbidity did not exhibit a defined spatial pattern as there was considerable
overlapping of mean values for all parameters based on the statistical rankings. In particular, total
suspended solids and turbidity were highly variable from the upstream to downstream stations. A
few spatial patterns were observed for total solids and total dissolved solids. Mean concentrations of
these two solids constituents were significantly greater in the Rocky River than other stations. There
also appeared to be some additional increases in these two solids constituents at Station BF413
located in the lower segment of Reach 2 below the Blewett Falls Hydroelectric Plant (Figure 5-28).
Ammonia-nitrogen mean concentrations were significantly greater at Station TYK2 in the
headwaters of Lake Tillery and generally decreased with increasing distance downstream
(Figure 5-29). Mean ammonia-nitrogen concentrations at Station TY132 in Lake Tillery, Station
TY1B in Reach 1, and Station BFB2 in Blewett Falls Lake were intermediate to the mean
concentrations at Station TYK2 and other stations. Nitrate + nitrite-nitrogen and total phosphorus
concentrations were significantly greater in the Rocky River compared to mean concentrations in
Project reservoirs and the mainstem river. Mean concentrations at these latter stations did not
significantly differ from each other.
There were additional inputs of total organic carbon from the Rocky River into Reach 1 and also
downstream of the Blewett Falls Hydroelectric Plant in Reach 2 at Stations BF313 and BF413
(Figure 5-29). Mean total organic concentrations were significantly lower in Lake Tillery, Blewett
Falls Lake, and the tailwaters stations located immediately downstream (Stations BFOB and BF113).
The spatial pattern of total organic mean concentrations also suggested dilution of concentrations
with additional tributary inflow in Reach 1 and Blewett Falls Lake.
Mean concentrations of anions and cations and specific conductance were significantly greater inthe
Rocky River (Station RR) compared to the reservoir and mainstem river stations (Figure 5-30).
There were no significant spatial differences in mean concentrations of calcium and magnesium
from Lake Tillery tailwaters to river stations below Blewett Falls Lake, which indicated no
cumulative changes in concentrations of these two parameters through both hydroelectric
developments. Mean sodium concentrations were significantly greater at Stations BF313 and BF413
compared to upstream stations indicating additional inputs in this downstream section of the river.
Mean chloride concentrations were also significantly greater at Station BF413 and similar to mean
concentrations at Station BF313 and the Rocky River. Mean sulfate concentrations significantly
increased at Station TY1213, which indicated the influence of inputs from the Rocky River. Sulfate
mean concentrations were significantly lower in Blewett Falls Lake and the tailwaters stations
located downstream in the Fall Line zone (Stations BFOB, BF 113, and BF213). Additional tributary
input may have diluted sulfate concentrations in these downstream areas. Mean sulfate
concentrations then increased at Stations BF313 and BF413 and indicated additional loading in this
section of the river. Correspondingly, the spatial pattern of specific conductance mean values was
very similar to the observations for sodium, chloride, and sulfate (Figure 5-28).
5-84
Section 5 Results and Discussions
5.3.6 State Water Quality Standards at Project Reservoirs and Tailwaters
5.3.6.1 North Carolina Waters
North Carolina has an established set of water quality standards applicable to waters within the state
depending upon the best usage classification. These standards are outlined in the NCDWQ
"Redbook" for surface waters and wetlands under the N.C. Administrative Code 15A NCAC
02B.0200) (NCDWQ 2004b). The basic set of standards, applies to Class C waters, which "shall be
suitable for aquatic life propagation and maintenance of biological integrity (including fishing and
fish), wildlife, secondary recreation, agriculture and any other usage except for primary recreation or
as a source of water supply for drinking, culinary or food processing purposes". Blewett Falls Lake
and the Pee Dee River reach from the Tillery Dam to Blewett Falls Lake have been classified by the
NCDWQ as drinking water supplies (Classes WS-IV and WS-V, B) and suitable for primary (Class
B) and secondary recreation uses (Class C) including fishing, wildlife, fish, aquatic life propagation
and survival, and agriculture. Additional primary recreation and drinking water numeric and
narrative standards also apply to Lake Tillery, the Pee Dee River from Tillery Dam to Blewett Falls
Lake, and Blewett Falls Lake (NCDWQ 2004b, 2005). The Pee Dee River below Blewett Falls
Lake to the North Carolina-South Carolina state line has a Class C designation. The water quality
parameters that were monitored during this survey and the number and percentage of values that
exceeded the applicable North Carolina water quality standard are given in Tables 5-24 and 5-25.
Summer temperature maxima were generally below 32°C in the Project reservoirs and tailwaters
(Table 5-25). There was only one instance of atemperature value exceeding 32°C and that occurred
at Lake Tillery (Station TYH2) on ahot summer day in August 2000 (Appendix A, Table A-1). The
Tillery and Blewett Falls Hydroelectric Plants do not produce or release heated discharges into the
reservoir or tailwaters so this isolated occurrence was related to a climatic event.
Monthly DO concentrations in Project reservoir surface waters were usually greater than the North
Carolina instantaneous (4.0 mg/L) and daily average water (5.0 mg/L) quality standards during the
monitoring period. The only exception occurred at Station TYK2 in Lake Tillery during July 2004
where DO values ranged from 4.7 to 4.8 mg/L throughout the water column. These lower DO
concentrations did not result from operation of the Tillery Hydroelectric Plant as this shallow, well-
mixed station was the farthest upstream station and not prone to typical reservoir stratification and
DO depletion like the deeper reservoir areas. The NCDWQ (2002) observed a DO value of
4.8 mg/L downstream of this station (near Station TYH2) during August 1999. All other DO values
measured by the NCDWQ were above 5.0 mg/L during summer surveys of Lake Tillery during 1994
and 1999. The Yadkin-Pee Dee River Basin Association (YPDRBA) has monitored Lake Tillery
near Station TYF2 from 1998 to 2001 (NCDWQ 2002). No DO values measured by the YPDRBA
were below the North Carolina water quality standards at this monitoring site for the 1998 to 2001
period.
5-85
Section 5 Results and Discussions
Table 5-24 Water quality parameters measured at Project waters that have applicable
North Carolina or South Carolina water quality standards.
North Carolina South Carolina
Water Quality Standard' Water Quality Standard'
Parameter Class WS-IV
Class C and WS-V Freshwaters
Aquatic Life Drinking Waters

Temperature < 32°C and < 2.8°C above < 32.2°C and < 2.8°C above
natural temperature natural temperature

Dissolved oxygen > 5.0 mg/L daily average and > 5.0 mg/L daily average
>4.0 mg/L instantaneous with low of 4.0 mg/L
pH Between 6.0 to 9.0 units Between 6.0 and 8.5 units

Turbidity <_ 25 NTU for reservoirs and
_< 50 NTU
<50 NTU for streams
Copper 7 pg/L Action Level 3.8 µg/L CMC
2.9 pg/L CCC
Chloride 230 mg/L Action Level
Mercury < 0.012 µg L 1.6 pg/L CMC
0.91 pg/L CCC
Chlorophyll a < 40 pg/L
Total dissolved solids < 500 mg/L
Total hardness < 100 m2/L
Sulfates < 250 mg/L
i More detailed numeric and narrative criteria are provided in NCDWQ (2004b) and SCDHEC (2004a).
1 Class B water quality standards apply to primary recreation, including frequent or organized swimming (NCDWQ
2004b). Water quality standards applicable to Class C waters also apply to Class B waters. Water quality standards
applicable to Class B waters include: "(a) Sewage, industrial wastes, or other wastes: none which are not
effectively treated to the satisfaction of the Commission , in determining the degree of treatment required for such
waste discharged into waters to be used for bathing, the Commission shall consider the quality and quantity of the
sewage and wastes involved and the proximity of such discharges to waters in this class, discharges in the immediate
vicinity of bathing areas may not be allowed if the Director determines that the waste can not be reliably treated to
ensure the protection of primary recreation, (b) Organisms of coliform group: fecal coliforms not to exceed
geometric mean of 200/100 ml (MF count) based on at least five consecutive samples examined during the 30-day
period and not to exceed 400/100 ml in more than 20 percent of the samples examined during such period."
5-86
Section 5 Results and Discussions
Table 5-25 Sample size (n) and the total number and percent of exceedances (in
parenthesis) of water quality parameters measured during this study for the
applicable North Carolina water quality standards at the Tillery and Blewett
Falls Hydroelectric Plants, 1999-2004.
Exceedances from North Carolina Water Quality Standards'
Pee Dee River Pee Dee River
Locatiion? Lake Tillery below Tillery- Blewett Falls below Blewett
Reach 1 Lake Falls-Reach 2
TYB2, TYD2, BFB2, BFF2,
Station TYF2, TYH2, TY1B TY12B and BFH2 BF1B
and TYK2
Parameter
Temperature
Surface n = 180 n = 47 n-48 n = 108 n = 36
(<1 m depth) 1(0.6%) 0 0 0 0
Uissolved oxygen
Surface
(<Imdepth) n=180 n=47 n=48 n=108 n=36
<4.0 mg/L 0 3(6.4%) 0 0 0
<5.0 mg/L 1(0.6%) 6(12.8%) 1(2.1%) 0 5(13.9%)
pH
Surface
(<1 m depth) n = 180

<6
0units
0
n=47 n=48 n = 108
n=36
.
> 9.0 units 4(2.2%)
5(4.6%)
0 0 0
Bottom n = 24
< 6.0 units n = 95
0
> 9
0 units 0 NW NW NW
. 0 0
Turbidity
Surface n-180 n- 48 n- 108 n- 36
(Q m depth) 6(3.3%) n = 47 3(6.2%) 11(10.2%) 0
0
Bottom n = 95
N/A NW n = 24 NW
9(9.5%) 19(79.2%)4
Copper
Surface n = 108 n = 108 n = 36
(Q m depth) 0 n
47 % 9(8.3%) 3 (8.3%)
0 4 (8.3
0)
Bottom n = 96 N/A' N/A' n = 24 NW
1 (1.0%) 2 (8.3%)'
Chloride
Surface n = 108 n = 47 n- 108

(<1 m depth)
0
0 n- 48
0 n- 36
0 0
Bottom n 096 NW NW n
24 NW
0
5-87
Section 5 Results and Discussions

Exceedances from North Carolina Water Quality Standards'
Pee Dee River Pee Dee River
Blewett Falls
Location Lake Tillery below Tillery- below Blewett
Lake
Reach 1 Falls-Reach 2
TYB2, TYD2,
BFB2, BFF2,
Station TYF2, TYH2, TY1B TY12B BF1B
and BFH2
and TYK2
Parameter
Surface n = 108
n
47
n
48 n = 108
(<1 m depth) 0 0 0 0 n=36
0
Bottom n = 96 N/A' N/A' n = 24
13( 13.5%) 0
Total dissolved solids
Surface n = 108 n = 47 n = 48 n = 108 n = 36
(<1 m depth) 0 0 0 0 0
Bottom n 96 N/A' N/A' n 024
0
Total hardness
Surface n = 108
n
47 n = 108 n = 36
(<1 m depth) 0 0 1(2.1%) 0 0
Bottom n -96 N/A' N/A' n 24 N/A'
0
Sulfate
Surface n = 108
n
47
n
48 n- 108 n- 36
(<1 m depth) 0 0 0
0 0
Bottom n 96 N/A' N/A' n = 24 N/A'
Chlorophyll a
Photic zone n = 108 N/A' N/A' n 0 108 NSA'
0 1 (0.9%)
Refer to Table 5-24 for the North Carolina water quality standard numeric value.
2 The years 2000, 2002, and 2004 were evaluated for Lake Tillery ; 2000, 2001, 2002, and 2004 were evaluated for
Stations TY 1 B and TY 12B in Reach 1 of the Pee Dee River, 1999, 2001, and 2004 were evaluated for Blewett Falls
Lake and Reach 2 of the Pee Dee River.
3 Not applicable (N/A).
4 Turbidity values were only measured in bottom waters at Stations BFB2 and BFF2 of Blewett Falls Lake during
2004.
5 Copper value for Station BFB2, bottom waters, December 2004, not included in this analysis due to suspected
sample contamination (Appendix D, Table D-3).
6 The laboratory lower reporting limit for mercury is 0.20 pg/L therefore no values that were less than the reporting
limit were included in this analysis. Only values that were greater than 0.20 pg/L were considered exceedances
from the North Carolina water quality standard.
5-88
Section 5 Results and Discussions
Detailed assessments of DO dynamics in the tailwater reaches of the Pee Dee River below the
Tillery and Blewett Falls Hydroelectric Plants (i.e., Reaches 1 and 2) can be found in Progress
Energy 2005a and 2005b. These assessments, conducted in 2004, also evaluated DO concentrations
relative to the North Carolina instantaneous and daily average water quality standards. The
following discussion will focus on results from the monthly survey data which may not be similar to
results from the intensive DO studies conducted in 2004.
Monthly DO concentrations below the North Carolina water quality standards were more frequently
observed in the Tillery and Blewett Falls tailwaters compared to reservoir waters (Table 5-25). At
Station TY113, located in the immediate tailwaters below the Tillery Plant, 6.4 percent of the
monthly DO values were below 4.0 mg/L and 12.8 percent of the monthly DO values were below
5.0 mg/L during 2000, 2001, 2002, and 2004. Only one occurrence was noted below 5.0 mg/L at
Station TY1213, located downstream of the Rocky River confluence. Dissolved oxygen values less
than 5.0 mg/L were also noted in July 2004 in Reach 1 during the no power generation period at
Stations TY1B and TY12B (Appendix A, Table A-6). Below Blewett Falls Hydroelectric Plant,
13.9 percent of the DO values were less than 5.0 mg/L while no DO values were less than 4.0 mg/L
for the 1999, 2001, and 2004 period (Table 5-25 and Appendix B, Tables B-4 to B-6). During 2004,
DO values below both North Carolina water quality standards were also measured at Station BE 1B
during the no power generation period in July (3.3.mg/L) and August (4.5 mg/L) (i.e., 17 percent or
two of the 12 monthly DO values).
Long-term monitoring by the NCDWQ (2002) from 1996 to 2001 showed DO concentrations below
the daily average water quality standard of 5.0 mg/L for at least 10 percent of the measurements
during the six year period at the following locations: (1) Pee Dee River at N.C. Highway 731 below
the Tillery Hydroelectric Plant (just downstream of Station TY113); (2) Brown Creek, a major
tributary associated with the Pee Dee National Wildlife Refuge; (3) Pee Dee River atN.C. Highway
109 (corresponds to Station TY12B); (4) Pee Dee River atU.S. Highway 74 below the BlewettFalls
Hydroelectric Plant (corresponds to Station BF1B), and(5)Marks Creek, atributary downstream of
the Blewett Falls Plant. The NCDWQ (2002) indicated that low DO levels in the Pee Dee River
from Tillery (Norwood) Dam to Turkey Top Creek seem to be related to reservoir hypolimnetic
releases from the Tillery Hydroelectric Plant. Low DO concentrations have also been measured in
Brown Creek, Clarks Creek, and the Little River within this reach during past years by the NCDWQ
and YPDRBA. Inflow of low DO water from tributaries may also contribute, to some extent, to the
seasonal low DO conditions in the Pee Dee River.
The YPDRBA performed long-term monitoring of water quality at 71 sites within the river basin
from 1998 to 2001 (NCDWQ 2002). The YPDRBA found 4.9 and 16.4 percent of DO
measurements were below the North Carolina instantaneous and daily average DO standards,
respectively, at its monitoring site located at U.S. Highway 74 below the Blewett Falls Plant. This
YPDRBA sampling site corresponds to Station BF1B.
There were afew instances of PH values exceeding the upper limit (9.0 units) of the North Carolina
water quality standards in the surface waters of Lake Tillery and Blewett Falls Lake (Tables 5-24
and 5-25). The percentage of exceedances, based on total sample size, ranged from 2.2 percent at
Lake Tillery for the 2000, 2002, and 2004 period to 4.6 percent at Blewett Falls Lake for the 1999,
2001, and 2004 period. These pH excursions were related to algal blooms during the spring or
summer months and not as a result of Project operations. There were no instances of pH values
5-89
Section 5 Results and Discussions
exceeding the North Carolina water quality standards in reservoir bottom waters or in the tailwaters
reaches below each power plant (Table 5-25). The NCDWQ (2002) found a small percentage of
samples (5.5 to 5.7 percent) that had pH values that were below 6.0 units at the N. C. Highway 109
(Reach 1) and U. S. Highway 74 (Reach 2) sites during the 1996 to 2000 monitoring period. No pH
values exceeded the water quality standards at the N.C. Highway 731 monitoring site (Reach 1).
These low pH values may have been related to inflow of lower pH water from tannic-stained
tributaries within each reach. No pH values measured by the YPDRBA at the Lake Tillery or U.S.
Highway 74 monitoring sites from 1998 to 2001 exceeded the state water quality standard.
All chlorophyll a values were below the North Carolina water quality standard of 40 gg/L at Lake
Tillery for the 2000, 2002, and 2004 period (Table 5-25). At Blewett Falls Lake, only one
chlorophyll a sample exceeded the water quality standard. (0.9 percent of total number of collected
samples). No chlorophyll a samples collected by the NCDWQ or YPDRBA from the Project
reservoirs exceeded the water quality standard (NCDWQ 2002).
Turbidity values above the North Carolina water quality standards were measured in surface and
bottom waters of Lake Tillery and Blewett Falls Lake and in surface waters at Station TY12B,
located downstream of the Rocky River (Table 5-25). Generally, the percentage of samples that
exceeded either the reservoir (25 NTU) or stream (50 NTU) standards was greater in reservoir
bottom waters and in Blewett Falls Lake. A large percentage of bottom water samples (79 percent)
collected from Blewett Falls Lake during 2004 exceeded the reservoir water quality standard.
However, high turbidities in reservoir waters were not necessarily reflective of high turbidity
conditions in the immediate tailwaters downstream of each hydroelectric development. No turbidity
values were above the stream water quality standard at Stations TY1B or BF1B below the Tillery
and Blewett Falls Hydroelectric Plants, respectively, during the survey period (Table 5-25).
Turbidity values greater than 50 NTU were measured in a small percentage of samples (1.8 to
2.6 percent) collected by the NCDWQ and YPDRBA from the N.C. Highway 731 and U. S. Highway
74 sites below the Tillery and Blewett Falls plants, respectively. Approximately 8 percent of
samples measured by the NCDWQ at the N.C. Highway 109 site (Station TY12B) exceeded the
50 NTU level (NCDWQ 2002). Turbidity values exceeding the stream water quality standard were
also measured by the NCDWQ and YPDRBA in several tributaries of Reach 1 (Rocky River, Clarks
Creek, Brown Creek, and Little River) from 1996 to 2001.
Copper concentrations occasionally exceeded the North Carolina Action Level of 7 gg/L with the
greatest frequency of exceedances occurring downstream of the Rocky River at Station TY 12B in
Reach 1, in Blewett Falls Lake, and at Station BF 1B in the Blewett Falls tailwaters (Table 5-25).
The spatial pattern of copper value exceedances suggested that the Rocky River or some other
tributary was a source of copper input into the intervening watershed of Reach 1 below the Tillery
Hydroelectric Plant. Copper concentrations greater than 7 gg/L were measured by the NCDWQ in
the Rocky River, Brown Creek, and Little River during 1996 and 2001 with the greatest percentage
of exceedances (28 percent of 50 samples) occurring in the Rocky River site near Norwood, NC
(NCDWQ 2002). The NCDWQ found less than 10 percent exceedance of copper values from the
Action Level at the following stations: (1) Pee Dee River at N.C. Highway 731 (Reach 1); (2) Pee
River at N.C. Highway 109 (Reach 1); and (3) Pee Dee River at U. S. Highway 74 (Reach 2).
Mercury concentrations above the North Carolina water quality standard occurred in bottom waters
of Lake Tillery during the 2000, 2002, and 2004 period (Table 5-25). Mercury concentration were
5-90
Section 5 Results and Discussions
less than the laboratory report limit of 0.2 gg/L in Lake Tillery surface waters, at Stations TY 1 B and
TY12B in Reach 1, in Blewett Falls Lake, and at Station BF113 in Reach 2.
Total dissolved solids, chloride, sulfate, and total hardness were below the North Carolina water
quality standards in Project reservoirs and tailwaters with one exception during the survey period
(Table 5-25). One total hardness value (128 mg/L) exceeded the North Carolina water quality
standard of 100 mg/L at Station TY12B during August 2001.
Fecal coliform was not evaluated in the water quality surveys of Project reservoirs and tailwaters.
However, data collected by the NCDWQ and YPDRBA from 1996 to 2001 were reviewed for
relevance to Project waters (NCDWQ 2002). The North Carolina water quality standard for fecal
coliform is 200/100 ml for all freshwater bodies. Fecal coliform counts were less than the state water
quality standard for the majority of samples collected from waters associated with the Project.
5-91
Section 6 - Summary
A monthly water quality survey program was conducted at the Tillery and Blewett Falls
developments during 2004 to characterize the existing water quality conditions in the Project
reservoirs and downstream tailwaters, including the effects of the Rocky River tributary inflow.
Historical data collected from Project associated waters during the 1999 to 2002 period were also
evaluated to examine temporal and spatial trends in water quality. The Water Resources Work
Group had identified a need for additional water quality studies at Project reservoirs and tailwaters
during study plan scoping meetings held in 2003. Specific objectives of this study were to:
(1) address meeting state water quality standards and supporting designated uses in the reservoirs
and tailwaters; (2) evaluate the Project operation effects on water quality in both reservoirs and
tailwaters; (3) assess cumulative effects of nutrient and sediment loading on reservoirs and
tailwaters; and (4) determine water quality effects of Rocky River inflow.
The water quality data collected during the majority of the survey years (i. e., 1999 to 2002) occurred
under low flow, drought conditions within the Yadkin-Pee Dee River basin. Flow conditions during
2004 were near normal for most of the year with the exception of high flow events associated with
passage of several tropical storm systems in September. Low-flow conditions tended to reduce
observable effects (e.g., solids and nutrients) from nonpoint discharge sources and magnify effects
(e.g., anions and cations, COD, and specific conductance) from point source discharges. High-flow
events tend to magnify the effects of nonpoint discharge sources. These flow and climate conditions
have to be considered when interpreting the survey results.
Lake Tillery was characterized as a deep, mesotrophic reservoir with moderate nutrient and solids
concentrations, moderate water clarity, and weakly buffered with low to moderate anion and cation
concentrations. The short hydraulic retention time of the reservoir (average of 8.3 days), coupled
with the "filtering effect" of the four upstream reservoirs (i.e., High Rock Lake, Tuckertown
Reservoir, Narrows Reservoir, and Falls Lake), influenced the nutrient and solids concentrations,
turbidity values, and the trophic status of the reservoir. In contrast to Lake Tillery, Blewett Falls
Lake was a shallow, nutrient-enriched, eutrophic reservoir with greater solids and turbidity levels.
Water quality in Blewett Falls Lake, as well as a large upstream portion of the Pee Dee River, was
influenced in varying degrees by inflow from the Tillery Hydroelectric Plant, Rocky River, and
other tributaries within this river reach. Chlorophyll a (an indirect indicator of algal production)
concentrations were lower on average in Lake Tillery when compared to Blewett Falls Lake. Algal
dynamics in both reservoirs were largely influenced by the reservoirs' short hydraulic retention times
which limited nutrient uptake by phytoplankton and subsequent production. Additionally, the turbid
water conditions in Blewett Falls Lake limited light penetration for photosynthesis. There were very
few instances of chlorophyll a concentrations exceeding the North Carolina water quality standard in
either lake during the survey period. Long-term data collected the NCDWQ and Progress Energy
indicated the water quality conditions in the reservoirs appeared to have either improved or not
appreciably changed since the 1980s depending upon the examined parameter and reservoir. Both
reservoirs continued to support their designated water quality use designations based on recent
assessments by the NCDWQ during 2002.
The short hydraulic retention time of both Project reservoirs also influenced the spatial pattern of
water quality parameters. Most water quality parameters were fairly uniform with few significant
longitudinal differences (i.e., upstream to downstream) observed at either reservoir. The only
6-1
Section 6
exceptions at Lake Tillery were significantly greater nitrate + nitrite-nitrogen and total phosphorus
concentrations in the upper and middle reservoir areas when compared to the lower reservoir near
the dam. Significant increases in these two nutrient parameters may have reflected inputs from the
river upstream of the reservoir and/or the Uwharrie River and algal dynamics and nutrient uptake
rates.
There were significant temporal differences in the water quality of each reservoir which reflected
precipitation levels and river inflow and outflow within a given year. Generally, solids constituents
(especially total dissolved solids), most nutrient constituents, anions and cations, COD, total
alkalinity, and specific conductance were greater during the lower flow, drought years (1999-2002)
when compared to 2004, a year with greater flow levels. Lower reservoir inflow and outflow during
the lower flow years tended to increase total dissolved solids, nutrients, anions and cations, and
specific conductance. Higher COD values were likely the result of greater organic decomposition
with increased hydraulic retention time in lower flow years.
Temperature stratification and DO depletion dynamics in each reservoir were influenced by
reservoir depth, the relative amount of precipitation and inflow within the river basin, and the
amount of power generation. Lake Tillery usually experienced strong seasonal temperature
stratification patterns from May until September, although stratification could either be prolonged or
disrupted by one to two months depending upon precipitation levels and inflow and outflow
conditions. The shallow nature of Blewett Falls Lake, coupled with river inflow and power plant
operations, influenced the temperature stratification and DO depletion patterns within the reservoir.
Unlike Lake Tillery which had awell-defined temperature stratification period, Blewett Falls Lake
usually had very weak to moderate temperature stratification which could be disrupted with reservoir
water column turnover during high river inflows and increased power plant generation. The
epilmnion, metalimnion, and hypolimnion strata were also not as well defined in Blewett Falls Lake
during the stratification period as was the case for Lake Tillery. Temperature stratification and DO
depletion were also independent processes in Blewett Falls Lake and therefore did not closely
correspond together as observed in Lake Tillery.
Dissolved oxygen depletion occurred during the late spring, summer, and early fall months (usually
May until September) in both reservoirs. The presence and persistence of low to anoxic DO
conditions in the hypoliminion depended upon precipitation and flow conditions within a given year.
In Lake Tillery, there were very strong top to bottom differences in DO during the stratification
period with low to anoxic DO conditions (< 1 to 4 mg/L) occurring at the 12 to 19 m depth of the
intake structure. The seasonal DO depletion was not quite as pronounced at Blewett Falls Lake, and
anoxic conditions were usually confined to the bottom two to three meters in the reservoir water
column. Blewett Falls Lake also did not have avery large volume of anoxic water present during the
stratification period as observed at Lake Tillery. The release of low DO water from both reservoirs
during power generation periods resulted in corresponding low DO conditions in the Project
tailwaters. Low DO conditions were also observed in each power plant tailwaters during no power
generation periods which suggested other factors algal respiration, organic matter decomposition,
tributary inflow of low DO water, and/or power plant wicket gate leakage were also influencing
DO dynamics in the tailwater areas, particularly during no power generation periods.
6-2
Section 6
The influence of lake levels and flows through the Project reservoirs on water quality was examined
with correlation analysis during this study. The correlation analysis examined the statistical
relationship betweenfactors being correlated and can be either negative (i.e., inverse relationship) or
positive (i.e., corresponding relationship). Results of the correlation analysis for lake levels
indicated weak relationships for only a few water quality parameters for Lake Tillery or Blewett
Falls Lake. For Lake Tillery, weak negative correlations occurred between lake level and total
aluminum while weak positive relationships occurred for calcium and chloride. The weak
correlation between lake level and water quality parameters was not unexpected given that Lake
Tillery has a relatively stable lake level and generally did not deviated more than 2 ft except for a
few circumstances during the survey period. At Blewett Falls Lake, there were significant, but weak
negative correlations between lake level and pH, total suspended solids, and aluminum and positive
correlations with specific conductance, ammonia-nitrogen, total alkalinity, sodium, and sulfate.
Generally, results from this lake level correlation analysis were indicative of the amount of inflow
into the Project reservoirs as well as seasonal changes in water quality.
Weak to moderate correlations existed between daily average flow and the examined water quality
parameters for Lake Tillery and Blewett Falls Lake. Results of the correlation analysis were also
inconsistent between both lakes. Water temperature, most anions and cations, and specific
conductance were negatively correlated with flow at both Project reservoirs while positive
correlations occurred for DO, nitrate + nitrite-nitrogen, and aluminum. However, there were
differing relationships between flow and turbidity, solids constituents, ammonia-nitrogen, total
phosphorus, total organic carbon, chemical oxygen demand, and copper at both reservoirs.
Observed relationships between flow and water quality were likely related to the: (1) reservoirs'
hydraulic retention time and amount of inflow; (2) relative differences in the water quality
characteristics between the two lakes; and (3) degree of influence of upstream nonpoint and point
source discharges on reservoir water quality.
The water quality in the Pee Dee River reach from the Tillery Development to Blewett Falls Lake
(i.e., Reach 1) was spatially and temporally influenced by operation of the Tillery Hydroelectric
Plant and inputs from tributaries in the intervening watershed, most notably the Rocky River. Water
quality characteristics in the five mile segment from the Tillery Hydroelectric Plant to the
confluence with the Rocky River confluence resembled water quality characteristics of Lake Tillery
during power generation periods. Below the confluence, inflows of the Rocky River and other major
tributaries (i. e., Brown Creek and Little River) affected the water quality for the remaining 12 miles
of this river reach and Blewett Falls Lake. Flow contributions from the Tillery Hydroelectric Plant
during power generation periods influenced the degree of effect that the Rocky River had on water
quality in this reach. The effects of the Rocky River and other tributaries within this river reach was
most apparent during periods when the power plant did not generate for extended periods of time;
during very low stream flow conditions (e.g., anions and cations, total dissolved solids, and specific
conductance); or during very high-flow events associated with high precipitation events in the
watershed (e.g., total suspended solids, turbidity, and aluminum). The Rocky River was a source of
loading for solids constituents, turbidity (an indirect measure of sediment loading), nitrate + nitrite-
nitrogen, total phosphorus, total organic carbon, chemical oxygen demand, anions and cations, and
copper. Specific conductance, an indicator of concentrations of anions and cations, was also greater
in the Rocky River. Conversely, higher DO concentrations in the Rocky River helped ameliorate the
6-3
Section 6
seasonal effects of low DO discharges from the Tillery Hydroelectric Plant in this mainstem river
reach below the Rocky River confluence.
Operational effects of the Tillery Hydroelectric Plant on the water quality within Reach 1 were
assessed by examining water quality characteristics during power generation and no power
generation periods during 2004. Water quality samples for the no power generation period were
collected at least six hours after the last power plant generation event. DO concentrations were
significantly lower during the power generation period compared to the no power generation period
at the immediate tailwaters station (Station TY1B) and at the station located 12 miles downstream at
N. C. Highway 109 bridge (Station TY12B). Total suspended solids, turbidity, and aluminum were
significantly greater at the immediate tailwaters station during the power generation period.
Conversely, the nitrate + nitrite-nitrogen concentration was significantly greater during the no
generation period at this same station. At Station TY1213, ammonia-nitrogen was significantly
greater during the no power generation period than the power generation period. There were no
other significant differences in water quality parameters between the two generation periods at
Station TY1213. The lack of differences in water quality characteristics between the two flow
periods may have related to: (1) the influence of wicket gate leakage and dam spillage at the Tillery
Hydroelectric Plant may have been enough to minimize differences between the power generation
and no power generation periods; and (2) the water from previous generation events had not
completely passed at Station TY1213.
Water quality in the Blewett Falls tailwaters resembled lake water quality immediately below the
hydroelectric plant, butthere were significant changes asthe river transitioned into the Coastal Plain
of South Carolina. With increasing distance from the power plant, water quality characteristics were
more influenced by physiographic topography changes, watershed inflow, natural inputs of organic
matter, and point and nonpoint discharge sources. During power generation flow conditions in 2004,
there were significant increases in solids constituents, total phosphorus, total organic carbon, COD,
sodium, chloride, sulfate, total alkalinity, aluminum, copper, and specific conductance from the
power plant tailwaters to the Coastal Plain of South Carolina. Similar spatial differences were also
found for these same water quality parameters during 1999, 2001, and 2004. These changes in water
quality were not the result of power plant operations; rather, they were the result of watershed
effects and point and nonpoint discharges in the Coastal Plain portion of the river.
A comparison of power generation and no power generation flow periods was examined at Stations
BF1B and BF213, located 3.4 and 23.4 miles, respectively, downstream of the Blewett Falls
Hydroelectric Plant. Few consistent significant differences were found in the water quality between
the two flow periods at both stations. The results suggested the main effects of water quality
releases from the Blewett Falls Hydroelectric Plant were increased concentrations of total solids,
turbidity, and aluminum in the immediate tailwaters at Station BF1B. The only consistent
significant difference noted at both Stations BF 1B and BF213 was increased aluminum levels during
power generation flows. Solids, turbidity, and aluminum loading in Blewett Falls Lake was driven
by nonpoint source sediment inputs from the upstream reach of the Pee Dee River, including inputs
from the Rocky River and other tributaries.
In summary, inflow and outflow at the Project reservoirs and river tailwaters were largely influenced
by large-scale precipitation events in the river basin and upstream reservoir releases within the river
6-4
Section 6
basin, particularly during years with average or above average precipitation levels. During low-flow
years, reservoir outflow was mainly influenced by power plant generation. Large-scale precipitation
events in the river basin resulted in rapid turnover and movement of water through the reservoirs and
tributaries, such as the Rocky River, and increased the influx of total suspended solids, turbidity,
nutrients, and certain metals in reservoirs and tailwaters. During periods of lower inflow,
concentrations of total dissolved solids, anions and cations, and corresponding measurements of
specific conductance increased. In large part, operations of both hydroelectric plants did not
influence water quality characteristics as much as watershed effects from point and nonpoint
discharges and the amount of inflow and the hydraulic retention time.
The water quality of Lake Tillery was influenced by the lake's position in the Yadkin chain of lakes
because the upstream reservoirs provided a "filtering effect" on solids, nutrients, and other water
quality constituents. Downstream of the Tillery Development, water quality in the immediate
tailwaters, from the Tillery Dam to the Rocky River confluence five miles downstream, generally
reflected water quality conditions in Lake Tillery during power generation and no power generation
periods. The Rocky River, and to a lesser extent other tributaries within the tailwaters reach below
Tillery, were significant sources of increased loading of nitrate + nitrite-nitrogen, total phosphorus,
total organic carbon, chemical oxygen demand, anions and cations, and copper. The relative effect
of the Rocky River and other tributaries on water quality in the Pee Dee River reach below the
Tillery Hydroelectric Plant was flow dependent, both from the tributaries themselves and the amount
of generation releases from the power plant. Inputs from the Rocky River and other tributaries
influenced the water quality characteristics of Blewet Falls Lake, which were markedly different
when compared to Lake Tillery. The relatively short residence time of both lakes under normal
conditions resulted in little change in the water quality characteristics as water passed through the
Project reservoirs, particularly Blewet Falls Lake. Water quality characteristics in the immediate
tailwaters reach below the Blewet Falls Development were similar to Blewert Falls Lake. With
increasing distance downstream, water quality in the lower Pee Dee River was changed by
watershed inputs from physiographic and land use changes and nonpoint and point source
discharges.
Operations of the Tillery and Blewert Falls Hydroelectric Plants did result in seasonally low DO
concentrations in the tailwaters located downstream of each power plant. Dissolved oxygen
concentrations were below the North Carolina instantaneous and daily average water quality
standards during power plant generation periods during the summer months during the survey years.
With the exception of DO, other water quality variations from North Carolina water quality
standards in Project reservoirs and tailwaters were the result of larger-scale watershed effects and
point and nonpoint source discharges not as a result of Project operations.
6-5
Section 7 - References
Alcoa Power Generating, Inc. 2002. Yadkin Hydroelectric Project FERC No. 2197 NC. Project
Relicensing Initial Consultation Document, September, 2002. Alcoa Power Generating Inc.,
Yadkin Division, Badin, NC.
American Public Health Association. 1998. Standard methods for the examination of water and
wastewater. 20th edition. American Public Health Association, Washington, D.C.
Appalachian State University. 1999. North Carolina's Central Park: assessing tourism and outdoor
recreation in the Uwharrie Lakes region. Appalachian State University, September 1999.
Carolina Power & Light Company. 1987. Environmental surveys of Lake Tillery and Blewett Falls
Lake during 1986. Carolina Power & Light Company, New Hill, North Carolina.
1993. Tillery Hydroelectric Plant. 1992 environmental monitoring report. Carolina Power
& Light Company, New Hill, North Carolina.
1995. Blewett Hydroelectric Plant. 1993 environmental monitoring report. Carolina Power
& Light Company, New Hill, North Carolina.
North Carolina Department of Natural and Economic Resources, Division of Environmental
Management. 1983. North Carolina clean lakes classification survey 1982. Report No. 83-
03. North Carolina Department of Natural Resources and Community Development,
Division of Environmental Management, Water Quality Section, Raleigh, North Carolina.
1989. North Carolina lakes monitoring report. 1988. Report No. 89-04. North Carolina
Department of Natural Resources and Community Development, Division of Environmental
Management, Water Quality Section, Raleigh, North Carolina.
1992a. North Carolina lake assessment report. Report No. 92-02. North Carolina
Department of Natural Resources and Community Development, Division of Environmental
Management, Water Quality Section, Raleigh, North Carolina.
1992b. Water quality progress in North Carolina. 1990-1991. 305(b) report. Report 92-06.
North Carolina Department of Environment, Health, and Natural Resources, Division of
Environmental Management, Water Quality Section, Raleigh, North Carolina.
North Carolina Division of Water Quality. 1998. Yadkin-Pee Dee River basinwide water quality
management plan. May 1998. North Carolina Department of Environment and Natural
Resources, Division of Water Quality, Raleigh, North Carolina.
2000. Water quality progress in North Carolina 1998-1999 305(b) report. North Carolina
Division of Water Quality, Water Quality Section, Raleigh, North Carolina.
7-1
Section 7 References
2002. Basinwide assessment report. Yadkin River Basin. June 2002. North Carolina
Department of Environment, Health, and Natural Resources, Division of Water Quality,
Water Quality Section, Environmental Services Branch, Raleigh, North Carolina
2003. Yadkin-Pee Dee River basinwide water quality plan. North Carolina Department of
Environment and Natural Resources, Division of Water Quality, Raleigh, North Carolina.
March 2003.
2004a. North Carolina water quality assessment and impaired waters list (2004 integrated
305(b) and 303(d) report). Public review draft: April 27, 2004. North Carolina Department
of Environment and Natural Resources, Water Quality Section Planning Branch, Raleigh,
North Carolina
2004b. NC DENR-Division of Water Quality "Redbook". Surface waters and wetlands
standards. NC Administrative Code 15A NCAC 0213.0100, .0200 & .0300. Amended
effective: August 1, 2004. North Carolina Department of Environment and Natural
Resources, Division of Water Quality, Raleigh, North Carolina.
2005. Basinwide information management system. North Carolina waterbodies reports
(including stream classifications). .0309 Yadkin River Basin. Internet web site
http://h2o.enr.state.nc.us/bims/reports/basinsandwaterbodies/hydroYadkin.pdf. North
Carolina Division of Water Quality. (Accessed on May 3, 2005.)
2006. North Carolina water quality assessment and impaired waters list (2004 integrated
305(b) and 303(d) report). Public review draft: February 2006. North Carolina Department
of Environment and Natural Resources, Water Quality Section - Planning Branch, Raleigh,
North Carolina
North Carolina Division of Water Resources. 2005. Yadkin-Pee Dee River Basin drought news.
North Carolina Department of Environment and Natural Resources, Division of Water
Resources, Internet web site. www.ncwater.org/Drought Monitoring/Yadkin_PeeDee_
and Lumber/dmarchivenews/. (Accessed May 3, 2005.)
Progress Energy. 2003. Initial consultation document. Yadkin-Pee Dee River Project. FERC No.
2206. February 2003. Submitted by Progress Energy, Raleigh, North Carolina.
2004a. RWG meeting summary notes, templates, & study plans. Yadkin-Pee Dee River
Project FERC No. 2206. January 2004. Progress Energy.
2004b. Biology Program Procedures Manual (Procedures EVC-TSDC-00058, EVC-TSDC-
00062, and EVC-TSDC-00069). Progress Energy Carolinas, Inc., Raleigh, North Carolina.
20041. Biology Program Quality Assurance Manual. Progress Energy Carolinas, Inc.,
Raleigh, North Carolina.
7-2
Section 7 References
2004d. Yadkin-Pee Dee Hydroelectric Project FERC Project No. 2206. Relicensing water
quality studies of the Pee Dee River and Project reservoirs. Quality Assurance Project Plan.
December 2004.
2005a. Yadkin-Pee Dee River Hydroelectric Project FERC No. 2206. Continuous water
quality monitoring in the Pee Dee River below the Tillery and Blewett Falls Hydroelectric
Plants. Water Resources Group Issues Nos. 7 and 8, Lake Tillery and Blewett Falls Lakes &
Tailwaters Water Quality. Draft Report. Progress Energy, March 2005.
2005b. Yadkin-Pee Dee River Hydroelectric Project FERC No. 2206. Intensive temperature
and dissolved oxygen study of the Pee Dee River below the Tillery and Blewett Falls
Hydroelectric Plants. Water Resources Group Issues Nos. 7 and 8, Lake Tillery and Blewett
Falls Lakes & Tailwaters Water Quality. Draft Report. Progress Energy, March 2005.
SAS Institute. 1990. SAS/STAT User's Guide, version 6, 4th edition, vol.1. SAS Institute. Cary,
North Carolina.
Southeast Regional Climate Center. 2005. Historic climate summaries for Wadesboro, NC COOP
Station 318964. http://www.dnr.state.sc.us Columbia, South Carolina.
State Climate Office of North Carolina. 2005. Precipitation and mean daily temperature for
Wadesboro, NC COOP Station 318964. http://www.nc-climate.ncsu.edu Raleigh, North
Carolina.
South Carolina Department of Health and Environmental Control. 2001. Watershed water quality
assessment: Pee Dee Basin. March 2001. South Carolina Department of Health and
Environmental Control, Columbia, South Carolina.
2004a. Water classifications and standards. Regulation 61-68. South Carolina Department
of Health and Environmental Control, Bureau of Water, Columbia, South Carolina.
2004b. State of South Carolina integrated report for 2004. Part IL Assessment and
reporting. Submitted 4/1/2004. South Carolina Department of Health and Environmental
Control, Columbia, South Carolina
2004c. The State of South Carolina's 2004 integrated report. Part L Listing of impaired
waters. South Carolina Department of Health and Environmental Control, Columbia, South
Carolina.
U.S. Environmental Protection Agency. 1983. Methods for chemical analyses of water and
wastes. U.S. Environmental Protection Agency, EPA-600/4-79-020, Cincinnati, Ohio.
Wetzel, R.G. 2001. Limnology, lake and river ecosystems. Third edition. Academic Press, San
Diego, California. 980 pp.
7-3
APPENDICES
APPENDIX A
RAW DATA LISTING FOR WATER QUALITY PARAMETERS
COLLECTED IN LAKE TILLERY, THE PEE DEE RIVER, AND THE
ROCKY RIVER DURING 2000, 2001, 2002, AND 2004
Table A-1 Water temperature, dissolved oxygen, specific conductance, pH, and Secchi
disk transparency data collected from Lake Tillery (Stations TYB2, TYD2,
TYF2, TYH2, and TYK2) during 2000.
January 24, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L) (4)S/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 7.9 7.5 6.8 6.3 7.5 10.3 10.4 10.6 11.3 11.6 86 84 82 79 84 7.5 7.7 7.2 7.4 7.7
1.0 7.9 7.5 6.8 6.3 7.5 10.3 10.4 10.6 11.3 11.6 86 84 82 79 84 7.5 7.7 7.2 7.4 7.7
2.0 7.9 7.5 6.8 6.3 7.5 10.3 10.4 10.6 11.3 11.6 86 84 82 79 84 7.5 7.7 7.2 7.4 7.7
3.0 7.9 7.5 6.8 6.3 7.5 10.3 10.4 10.6 11.3 11.6 86 84 82 79 84 7.5 7.7 7.2 7.4 7.7
4.0 7.9 7.5 6.8 6.3 7.5 10.3 10.4 10.6 11.2 11.6 86 84 82 79 84 7.5 7.7 7.2 7.5 7.7
5.0 7.9 7.5 6.8 6.2 10.3 10.4 10.6 11.2 86 84 82 78 7.5 7.7 7.2 7.6
6.0 7.9 7.5 6.8 6.2 10.3 10.4 10.6 11.2 86 84 82 78 7.5 7.7 7.2 7.6
7.0 7.9 7.5 6.8 6.0 10.3 10.4 10.6 11.2 86 84 82 77 7.5 7.7 7.2 7.8
8.0 7.9 7.5 6.8 5.7 10.3 10.4 10.6 11.1 86 84 82 76 7.5 7.7 7.2 7.9
9.0 7.9 7.5 6.8 10.3 10.4 10.6 86 84 82 7.5 7.7 7.2
10.0 7.9 7.5 6.8 10.3 10.4 10.6 86 84 82 7.5 7.7 7.3
11.0 7.9 7.5 6.8 10.3 10.4 10.7 86 84 81 7.6 7.7 7.4
12.0 7.9 7.5 6.8 10.3 10.4 10.6 86 84 81 7.6 7.7 7.6
13.0 7.9 7.5 6.8 10.3 10.4 10.4 86 84 81 7.6 7.7 7.6
14.0 7.9 7.4 6.8 10.3 10.3 10.3 86 84 81 7.6 7.7 7.6
15.0 7.9 7.4 10.3 10.3 86 84 7.6 7.8
16.0 7.9 10.3 86 7.6
17.0 7.9 10.3 86 7.6
18.0 7.9 10.3 86 7.6
February 1, 2000
Depth Tempera ture Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 6.6 6.6 4.9 5.4 5.6 11.5 12.6 12.4 11.5 10.8 81 80 66 70 75 6.6 6.9 6.2 7.0 7.0
1.0 6.5 6.2 4.9 5.4 5.6 11.4 12.4 12.2 11.5 10.8 81 79 66 70 75 6.6 6.9 6.3 7.0 7.0
2.0 6.0 6.2 4.9 5.4 5.6 11.3 12.4 12.1 11.5 10.8 80 79 66 70 75 6.7 6.9 6.4 7.0 7.0
3.0 5.8 5.6 4.9 5.4 5.6 11.2 12.4 12.0 11.5 10.8 79 78 66 70 75 6.8 6.9 6.4 7.0 7.0
4.0 5.8 5.5 4.9 5.4 5.6 11.2 12.2 12.0 11.4 10.8 79 77 66 70 75 6.8 7.0 6.4 7.0 7.0
5.0 5.8 5.5 4.9 5.4 11.0 12.2 12.0 11.4 79 77 66 70 6.8 7.0 6.5 7.0
6.0 5.8 5.5 4.9 5.4 11.0 12.2 12.0 11.4 79 77 66 70 6.8 7.0 6.5 7.0
7.0 5.8 5.5 4.8 5.4 11.0 12.2 12.0 11.4 79 77 66 70 6.8 7.0 6.5 7.0
8.0 5.8 5.5 4.8 11.0 12.2 12.0 79 77 66 6.8 7.0 6.5
9.0 5.8 5.5 4.8 11.0 12.2 12.0 79 77 66 6.8 7.0 6.5
10.0 5.8 5.5 4.8 11.0 12.2 12.0 79 77 66 6.8 7.0 6.5
11.0 5.8 5.5 4.8 11.0 12.2 12.0 79 77 66 6.8 7.0 6.5
12.0 5.8 5.5 4.8 11.0 12.1 12.0 79 77 65 6.8 6.9 6.6
13.0 5.8 5.5 4.8 11.0 12.1 12.0 79 77 65 6.8 6.9 6.6
14.0 5.7 5.5 4.7 11.0 12.1 11.5 79 77 65 6.8 6.9 6.7
15.0 5.7 5.5 11.0 12.1 79 77 6.8 6.9
16.0 5.7 5.5 11.0 12.1 79 77 6.8 6.9
17.0 5.7 5.5 11.0 12.0 79 77 6.8 6.9
18.0 5.7 10.8 78 6.8
Appendix A - 1
Table A-1 (continued)
March 8, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L) (OS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 18.2 15.9 15.1 13.0 9.5 15.3 15.4 15.2 13.0 11.8 107 102 101 94 87 9.0 9.0 9.0 8.4 7.5
1.0 13.0 14.0 14.9 12.9 9.5 15.4 15.2 14.7 12.6 11.5 94 97 101 94 87 9.0 9.0 8.9 8.2 7.5
2.0 11.4 12.7 11.9 12.7 9.5 13.2 15.1 14.0 12.5 11.4 90 94 93 93 87 8.2 8.9 8.7 8.1 7.5
3.0 10.6 10.7 11.5 9.9 9.5 12.6 13.4 13.2 11.8 11.4 88 90 92 87 87 8.2 8.5 8.4 8.0 7.5
4.0 10.3 10.2 10.9 9.7 9.5 12.4 12.1 13.1 11.6 11.4 86 89 90 86 87 8.1 8.2 8.3 7.9 7.5
5.0 10.1 10.0 10.8 9.7 11.7 12.1 12.9 11.5 86 89 89 86 8.0 8.2 8.2 7.9
6.0 9.4 9.9 10.4 9.7 11.7 12.0 12.2 11.4 84 89 88 86 7.9 8.1 8.2 7.8
7.0 9.3 9.7 10.2 9.6 11.4 11.8 12.0 11.3 85 88 88 86 7.8 8.0 8.1 7.8
8.0 9.0 9.6 10.1 11.3 11.6 11.9 87 88 88 7.8 8.0 8.0
9.0 8.9 9.3 10.0 11.2 11.5 11.9 86 88 88 7.8 7.9 8.0
10.0 8.8 8.9 9.8 11.2 11.3 11.6 85 87 87 7.8 7.9 7.9
11.0 8.6 8.6 9.8 11.2 11.1 11.5 84 87 87 7.8 7.8 7.9
12.0 8.2 8.6 9.7 11.0 10.9 11.5 83 86 87 7.7 7.8 7.8
13.0 8.1 8.0 9.7 10.9 10.8 11.4 83 85 87 7.7 7.7 7.8
14.0 8.0 8.0 10.9 10.5 82 85 7.7 7.7
15.0 7.8 7.8 10.7 10.4 81 84 7.6 7.7
16.0 7.7 7.7 10.7 10.3 81 83 7.6 7.6
17.0 7.6 7.7 10.6 10.0 80 86 7.6 7.6
18.0 7.6 10.4 80 7.5
April 6, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 15.5 15.7 15.4 14.5 13.7 10.7 10.7 10.7 10.0 9.4 78 77 76 72 72 7.4 7.5 7.5 7.5 7.2
1.0 15.5 15.6 15.3 14.3 13.7 10.7 10.6 10.7 9.7 9.4 78 77 76 72 72 7.4 7.5 7.5 7.5 7.2
2.0 15.5 15.6 15.2 14.3 13.7 10.7 10.6 10.7 9.6 9.4 78 77 76 72 72 7.4 7.5 7.5 7.5 7.2
3.0 14.9 15.6 15.2 14.3 13.7 10.4 10.6 10.7 9.6 9.3 77 77 76 72 72 7.5 7.5 7.5 7.5 7.2
4.0 14.8 15.5 15.1 14.1 10.2 10.6 10.7 9.5 76 77 76 72 7.5 7.5 7.5 7.4
5.0 14.8 15.4 14.4 14.1 10.1 10.6 10.4 9.5 76 77 75 72 7.5 7.5 7.5 7.4
6.0 14.7 15.3 14.3 14.0 10.1 10.5 10.0 9.6 76 77 74 72 7.5 7.5 7.5 7.4
7.0 14.7 15.3 14.3 13.7 10.0 9.9 10.0 9.5 76 77 74 71 7.5 7.5 7.5 7.4
8.0 14.5 14.4 13.7 13.6 9.8 9.8 9.6 9.4 76 75 73 71 7.5 7.5 7.5 7.4
9.0 14.3 14.3 13.6 9.7 9.6 9.4 75 75 73 7.5 7.5 7.5
10.0 14.3 14.2 13.6 9.7 9.5 9.4 75 75 73 7.5 7.5 7.5
11.0 14.2 14.1 13.5 9.7 9.5 9.3 75 75 73 7.5 7.5 7.5
12.0 14.1 14.1 13.5 9.6 9.4 9.3 75 75 73 7.4 7.5 7.4
13.0 14.0 14.1 13.5 9.5 9.4 9.2 75 75 73 7.4 7.5 7.4
14.0 14.0 13.9 13.5 9.5 9.3 9.2 75 75 73 7.4 7.4 7.4
15.0 13.9 13.7 13.4 9.4 9.0 9.1 75 75 72 7.4 7.4 7.4
16.0 13.7 13.2 9.2 8.7 74 74 7.4 7.4
17.0 13.5 12.9 8.9 8.1 74 73 7.4 7.4
18.0 13.5 8.8 74 7.4
Appendix A - 2
Table A-1 (continued)
May 2, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 19.8 20.2 19.8 19.0 16.6 8.4 10.7 10.9 10.5 8.5 79 79 77 74 72 7.0 7.7 7.7 7.7 7.3
1.0 17.7 20.2 19.4 18.5 16.6 8.9 10.7 11.0 9.9 8.5 75 79 76 73 72 7.1 7.8 7.9 7.6 7.3
2.0 16.6 18.9 18.9 17.2 16.6 8.2 10.5 10.8 9.4 8.5 73 76 75 72 72 7.0 7.8 7.9 7.5 7.3
3.0 16.4 17.9 18.5 16.8 16.6 8.2 9.8 10.6 8.9 8.5 73 75 74 71 72 7.0 7.8 7.9 7.4 7.3
4.0 16.3 17.6 18.0 16.7 16.6 8.2 9.1 10.2 8.5 8.5 73 74 73 70 72 7.0 7.7 7.8 7.4 7.3
5.0 16.3 17.1 17.7 16.6 8.1 8.6 9.5 8.4 73 73 72 70 6.9 7.6 7.7 7.3
6.0 16.3 17.0 17.6 16.6 8.1 8.4 9.2 8.3 73 72 72 70 7.0 7.5 7.6 7.3
7.0 16.2 16.5 17.6 16.6 7.9 8.1 9.1 8.2 72 71 72 70 7.0 7.4 7.6 7.3
8.0 16.1 16.4 17.4 16.6 7.8 8.1 8.8 8.0 72 71 71 70 7.0 7.4 7.6 7.3
9.0 16.0 16.2 16.7 7.7 7.9 8.4 71 70 68 7.0 7.4 7.5
10.0 16.0 16.0 16.5 7.7 7.8 8.2 71 70 68 7.0 7.4 7.4
11.0 16.0 15.8 16.4 7.7 7.7 8.1 71 69 68 7.0 7.4 7.4
12.0 16.0 15.8 16.3 7.7 7.5 8.0 71 69 67 7.0 7.3 7.4
13.0 16.0 15.8 16.2 7.6 7.5 8.0 71 69 66 7.0 7.3 7.4
14.0 15.9 15.8 15.7 7.6 7.5 7.8 71 69 65 7.0 7.3 7.4
15.0 15.9 15.8 15.7 7.6 7.5 7.6 71 69 65 7.0 7.3 7.3
16.0 15.9 15.8 7.5 7.5 71 69 7.0 7.3
17.0 15.8 15.7 7.5 7.2 71 70 7.0 7.2
18.0 15.5 4.6 72 6.8
June 12,2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/ L) (OS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 27.2 27.9 28.0 27.8 22.7 8.9 9.6 9.8 10.0 6.1 110 112 111 111 102 7.6 8.0 8.3 8.3 7.3
1.0 25.7 26.8 27.0 27.2 22.7 9.4 10.0 9.9 10.1 6.1 107 109 108 110 102 7.7 8.3 8.3 8.4 7.3
2.0 25.3 26.5 26.2 27.1 22.7 9.5 9.9 9.5 10.1 6.1 106 109 106 109 102 7.8 8.4 8.1 8.4 7.3
3.0 24.6 25.0 25.3 26.9 22.7 9.2 8.7 8.5 9.9 6.1 105 105 106 109 102 7.8 8.2 7.9 8.3 7.3
4.0 24.1 23.8 24.7 26.8 8.3 7.1 7.6 9.7 103 103 104 108 7.7 7.8 7.7 8.3
5.0 23.5 23.4 23.3 25.1 7.4 6.8 6.0 7.9 102 101 102 106 7.6 7.7 7.6 8.1
6.0 23.2 23.3 22.9 23.0 6.1 6.4 5.6 5.9 101 101 102 102 7.5 7.6 7.5 7.7
7.0 22.9 22.8 22.6 23.0 5.6 5.5 5.3 5.8 101 100 101 102 7.5 7.4 7.5 7.7
8.0 22.7 22.6 22.3 23.0 5.2 5.4 5.1 5.8 100 100 101 104 7.4 7.4 7.5 7.5
9.0 22.3 22.4 21.9 4.9 5.4 5.0 100 100 100 7.3 7.3 7.5
10.0 22.2 22.1 21.8 4.9 5.3 4.7 99 100 100 7.2 7.2 7.5
11.0 22.0 21.9 21.7 4.8 5.2 4.6 99 99 100 7.2 7.2 7.5
12.0 21.7 21.6 21.7 4.5 4.7 4.5 99 99 100 7.1 7.1 7.4
13.0 21.2 21.2 21.5 4.2 3.8 4.4 98 98 99 7.1 7.1 7.3
14.0 20.9 21.0 21.3 3.9 3.6 4.0 97 98 99 7.0 7.0 7.3
15.0 20.5 20.5 21.3 3.7 3.2 3.7 97 97 99 7.0 7.0 7.2
16.0 20.0 20.1 3.3 2.6 96 97 6.9 7.0
17.0 19.6 19.9 2.8 2.2 95 97 6.9 6.9
18.0 18.8 1.4 97 6.8
Appendix A - 3
Table A-1 (continued)
July 10, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 29.5 29.9 30.0 29.8 25.5 8.9 8.9 9.3 9.4 5.8 114 114 115 116 114 7.9 8.0 8.6 8.5 7.7
1.0 28.8 29.3 29.9 29.6 25.5 8.9 9.2 9.3 9.5 5.7 112 113 115 115 114 7.9 8.3 8.6 8.5 7.6
2.0 28.0 28.9 29.6 29.3 25.5 8.4 9.3 9.3 9.5 5.8 110 113 114 115 114 7.8 8.4 8.6 8.5 7.6
3.0 28.0 28.7 29.2 29.2 25.5 8.4 9.3 9.1 9.5 5.8 109 112 112 114 114 7.5 8.4 8.6 8.5 7.6
4.0 26.7 28.1 29.0 28.7 3.6 8.3 9.0 9.5 109 110 112 113 7.4 8.3 8.5 8.4
5.0 26.2 26.0 28.7 28.5 2.9 5.0 8.5 8.6 109 111 111 113 7.3 8.0 8.3 8.2
6.0 26.0 25.5 28.4 27.2 3.5 3.8 8.1 6.7 111 112 111 114 7.3 7.8 8.2 8.1
7.0 25.8 25.2 27.3 26.8 3.9 3.2 6.9 5.5 111 111 112 114 7.2 7.7 8.1 7.9
8.0 25.5 25.1 26.8 2.2 3.2 6.0 109 111 113 7.2 7.6 8.1
9.0 25.3 24.9 25.9 2.2 3.2 4.4 109 110 112 7.2 7.6 7.9
10.0 25.2 24.5 25.2 2.2 1.6 4.0 109 107 112 7.2 7.5 7.8
11.0 24.7 24.2 24.6 2.0 1.4 2.9 107 106 111 7.2 7.4 7.7
12.0 24.2 24.0 24.2 1.2 1.4 2.3 104 105 110 7.1 7.4 7.8
13.0 24.0 23.7 24.1 1.2 1.3 2.0 104 104 110 7.0 7.4 7.8
14.0 23.5 23.4 23.7 1.2 1.1 0.5 102 104 110 7.0 7.3 7.8
15.0 23.1 23.2 23.7 1.2 0.7 0.4 101 104 110 7.0 7.3 7.5
16.0 22.9 22.5 1.1 0.3 101 111 7.0 7.2
17.0 22.5 22.3 0.9 0.1 101 125 7.0 7.1
18.0 21.6 0.1 108 6.9
August 8, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 31.3 31.5 31.5 32.9 26.6 11.9 11.9 12.3 11.8 7.5 123 124 124 130 129 8.0 8.1 8.4 8.2 7.7
1.0 29.1 30.0 30.4 31.7 26.6 12.4 12.5 12.8 12.5 7.5 119 121 123 127 129 8.2 8.2 8.4 8.3 7.7
2.0 28.2 29.3 29.8 30.0 26.6 12.8 12.6 13.1 13.1 7.5 117 119 121 123 129 8.2 8.2 8.5 8.4 7.7
3.0 28.1 29.0 29.5 29.2 26.6 9.2 11.8 12.9 11.7 7.5 117 118 120 122 129 8.2 8.2 8.5 8.4 7.7
4.0 27.5 28.3 29.2 28.8 7.6 9.2 11.5 10.4 115 118 119 124 8.1 8.0 8.4 8.2
5.0 27.2 27.6 28.4 27.5 5.0 6.9 9.7 7.7 116 118 119 127 8.0 8.0 8.4 8.0
6.0 26.8 27.0 27.7 26.6 2.2 4.5 8.4 7.6 116 119 120 127 7.8 7.9 8.2 8.0
7.0 26.6 26.5 27.1 26.6 1.8 2.6 5.7 7.3 116 121 122 127 7.8 7.8 8.2 8.0
8.0 26.5 26.3 26.7 26.6 1.4 2.5 4.8 7.0 116 121 123 127 7.7 7.8 8.0 7.9
9.0 26.3 26.1 26.5 1.1 2.4 4.5 116 120 123 7.7 7.8 8.0
10.0 26.1 25.9 26.3 0.9 2.2 4.0 116 120 124 7.7 7.7 7.9
11.0 26.0 25.8 26.1 0.8 1.2 3.7 116 119 124 7.6 7.7 7.8
12.0 26.0 25.7 26.0 0.7 1.1 3.3 116 119 125 7.6 7.7 7.8
13.0 25.6 25.6 25.9 0.5 1.0 2.9 117 119 125 7.6 7.6 7.8
14.0 25.5 25.5 25.8 0.3 0.7 2.4 117 119 125 7.6 7.6 7.7
15.0 25.4 25.4 0.2 0.4 118 119 7.6 7.5
16.0 25.3 24.9 0.2 0.3 118 121 7.5 7.5
17.0 24.8 24.2 0.1 0.1 119 137 7.5 7.4
18.0 23.9 0.1 130 7.4
Appendix A - 4
Table A-1 (continued)
Sep tember 5, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L ) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 26.6 26.8 27.2 26.9 26.1 5.1 5.3 6.8 7.1 6.8 118 119 121 126 131 6.9 7.0 7.2 7.3 7.1
1.0 26.6 26.8 27.2 26.9 26.1 5.1 5.3 6.8 7.0 6.8 118 119 121 126 131 6.9 7.0 7.2 7.3 7.1
2.0 26.6 26.8 27.2 26.9 26.1 5.0 5.3 6.8 7.0 6.8 118 119 121 126 131 6.9 7.0 7.2 7.3 7.1
3.0 26.6 26.8 27.2 26.9 26.1 5.0 5.3 6.6 7.0 6.8 117 119 121 126 131 6.9 7.0 7.2 7.3 7.1
4.0 26.6 26.8 27.2 26.9 5.0 5.3 6.6 7.0 117 119 121 126 6.9 7.0 7.2 7.3
5.0 26.6 26.8 27.2 26.9 5.0 5.2 6.6 7.0 117 119 121 126 6.9 7.0 7.2 7.3
6.0 26.6 26.8 27.1 26.9 5.0 5.2 6.4 7.0 117 119 122 126 6.9 7.0 7.2 7.3
7.0 26.6 26.8 26.9 26.9 5.0 5.2 5.3 7.0 117 119 125 126 6.9 7.0 7.1 7.3
8.0 26.6 26.8 26.8 26.9 5.0 4.8 4.6 6.7 117 119 128 128 6.9 6.9 7.0 7.2
9.0 26.6 26.8 26.5 5.0 4.8 3.3 117 119 131 6.9 6.9 7.0
10.0 26.6 26.8 26.4 5.0 4.8 3.1 117 119 131 6.9 6.9 6.9
11.0 26.6 26.5 26.3 5.0 2.6 2.8 117 123 131 6.9 6.9 6.9
12.0 26.6 26.4 26.3 5.0 2.2 2.7 117 125 131 6.9 6.8 6.8
13.0 26.6 26.4 26.2 5.0 2.2 2.6 117 125 132 6.9 6.8 6.8
14.0 26.6 26.4 26.0 4.8 2.2 2.1 117 125 133 6.9 6.8 6.8
15.0 26.3 26.4 26.0 0.7 2.2 1.5 122 125 136 6.8 6.8 6.8
16.0 26.2 26.3 0.6 2.7 125 127 6.7 6.8
17.0 25.9 25.8 0.6 1.8 125 133 6.7 6.8
18.0 25.1 0.8 131 6.6
October 4, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L ) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 24.1 25.2 26.2 24.8 22.7 7.6 10.2 11.0 10.1 7.3 115 119 124 129 125 7.1 7.8 8.5 8.1 7.8
1.0 23.5 24.1 25.1 24.4 22.7 7.5 10.3 11.5 9.5 7.3 114 116 122 128 125 7.1 8.0 8.7 8.0 7.8
2.0 23.2 23.7 23.6 24.0 22.7 7.0 10.5 10.8 8.9 7.3 113 115 119 127 125 7.1 8.2 8.6 8.0 7.8
3.0 23.1 23.4 23.4 22.8 22.7 6.3 8.6 10.3 7.0 7.3 113 114 120 124 125 7.1 8.0 8.4 7.8 7.7
4.0 23.1 23.2 23.1 22.4 6.2 7.7 10.2 6.7 113 114 121 124 7.1 7.9 8.3 7.7
5.0 23.0 23.1 22.8 22.3 6.3 6.2 9.2 6.4 113 114 122 123 7.1 7.8 8.1 7.6
6.0 23.0 23.0 22.6 22.2 6.4 6.1 9.0 6.3 113 114 121 123 7.0 7.7 8.0 7.5
7.0 23.0 23.0 22.4 22.2 6.5 6.2 8.5 6.3 113 114 120 123 7.0 7.6 8.0 7.5
8.0 23.0 22.9 22.2 22.2 6.5 6.3 8.0 6.3 113 115 120 124 7.0 7.6 8.0 7.5
9.0 22.9 22.9 22.0 5.9 6.3 7.2 114 115 120 7.0 7.5 7.9
10.0 22.9 22.8 22.0 5.9 6.4 7.1 114 116 120 7.0 7.5 7.7
11.0 22.9 22.8 22.0 5.9 6.4 7.1 114 115 121 7.0 7.5 7.6
12.0 22.9 22.7 21.9 5.9 6.5 6.9 114 116 120 7.0 7.4 7.5
13.0 22.9 22.6 21.8 5.9 6.6 6.8 114 115 120 7.0 7.4 7.5
14.0 22.9 22.3 21.7 5.9 6.6 6.5 114 117 120 7.0 7.4 7.5
15.0 22.8 22.1 5.8 6.8 114 118 7.0 7.4
16.0 22.8 22.0 5.7 6.8 114 119 7.0 7.3
17.0 22.8 22.0 5.6 6.8 114 119 7.0 7.3
18.0 22.8 21.9 5.3 6.4 116 127 7.0 7.3
Appendix A - 5
Table A-1 (continued)
November 15, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L ) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 17.7 17.5 17.0 16.8 17.2 9.0 9.1 10.1 8.3 7.6 109 108 111 113 114 7.1 7.3 7.3 7.3 7.2
1.0 17.7 17.5 17.0 16.8 17.2 8.8 9.0 9.6 8.2 7.6 109 108 111 113 114 7.1 7.2 7.3 7.3 7.2
2.0 17.7 17.5 17.0 16.5 17.2 8.8 9.0 9.5 8.2 7.6 109 107 111 112 114 7.1 7.2 7.3 7.3 7.2
3.0 17.3 17.3 17.0 16.4 17.2 8.8 8.9 9.5 8.2 7.6 106 107 111 112 114 7.1 7.2 7.3 7.2 7.2
4.0 17.3 17.3 16.9 16.2 8.8 8.8 9.5 8.2 106 107 111 111 7.1 7.2 7.3 7.1
5.0 17.3 17.3 16.8 16.2 8.7 8.8 9.4 8.2 106 107 110 111 7.1 7.2 7.3 7.1
6.0 17.3 17.3 16.8 16.2 8.7 8.8 9.4 8.2 106 107 110 111 7.1 7.2 7.3 7.1
7.0 17.2 17.3 16.8 16.2 8.5 8.8 9.4 8.2 107 107 110 111 7.1 7.2 7.2 7.1
8.0 17.2 17.3 16.7 16.1 8.5 8.7 9.2 8.1 107 107 110 112 7.1 7.2 7.2 7.1
9.0 17.2 17.2 16.7 8.4 8.6 9.1 107 107 110 7.0 7.1 7.2
10.0 17.2 17.2 16.7 8.3 8.6 9.1 107 107 110 7.0 7.1 7.2
11.0 17.1 17.2 16.7 8.3 8.5 9.1 107 107 110 7.0 7.1 7.2
12.0 17.1 17.2 16.7 8.3 8.5 9.0 107 107 112 7.0 7.1 7.2
13.0 17.1 17.2 16.7 8.2 8.5 2.5 107 107 113 7.0 7.1 7.2
14.0 17.1 17.2 16.7 8.1 8.4 0.4 106 107 122 7.0 7.1 7.2
15.0 17.1 17.2 8.1 8.4 106 107 7.0 7.1
16.0 17.1 17.2 8.1 8.2 106 107 7.0 7.1
17.0 17.1 17.2 8.1 8.2 106 107 7.0 7.1
18.0 17.1 17.2 8.1 8.2 106 106 6.9 7.1
December 5, 2000
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L ) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 12.0 11.5 10.9 10.8 11.7 9.8 9.6 10.1 9.8 9.1 93 93 99 100 102 7.0 7.3 7.3 7.3 7.3
1.0 11.9 11.5 10.9 10.9 11.6 9.8 9.6 10.1 9.7 8.9 93 93 98 100 101 7.0 7.3 7.3 7.3 7.3
2.0 11.8 11.5 10.5 10.5 11.7 9.8 9.6 10.0 9.6 8.9 93 93 98 99 101 7.0 7.3 7.4 7.4 7.3
3.0 11.8 11.5 10.5 10.5 11.6 9.8 9.6 10.0 9.5 8.9 93 93 98 98 101 7.0 7.3 7.4 7.4 7.3
4.0 11.8 11.5 10.4 10.4 9.8 9.6 9.8 9.3 93 93 97 98 7.0 7.3 7.3 7.3
5.0 11.8 11.4 10.3 10.3 9.8 9.6 9.8 9.3 93 93 97 98 7.0 7.3 7.3 7.3
6.0 11.8 11.4 10.3 10.3 9.6 9.6 9.7 9.2 93 93 97 98 7.0 7.3 7.3 7.3
7.0 11.7 11.2 10.3 10.3 9.5 9.3 9.7 9.2 92 93 97 98 7.0 7.3 7.3 7.3
8.0 11.6 11.2 10.2 10.3 9.4 9.3 9.6 9.2 92 93 97 98 7.0 7.3 7.3 7.3
9.0 11.6 11.2 10.2 9.3 9.3 9.6 92 93 97 7.0 7.3 7.3
10.0 11.6 11.2 10.2 9.3 9.2 9.6 92 93 97 7.0 7.3 7.3
11.0 11.6 11.2 10.2 9.3 9.2 9.6 92 93 97 7.0 7.3 7.3
12.0 11.5 11.2 10.2 9.2 9.2 9.6 92 93 97 7.0 7.3 7.3
13.0 11.5 11.2 10.2 9.2 9.2 9.6 92 93 97 7.0 7.3 7.3
14.0 11.5 11.2 10.2 9.2 9.2 9.6 92 93 97 7.0 7.3 7.3
15.0 11.5 11.2 10.2 9.2 9.2 9.4 92 93 97 7.0 7.3 7.3
16.0 11.5 11.2 9.1 9.2 92 93 7.0 7.3
17.0 11.5 11.2 9.1 9.2 92 93 7.0 7.3
18.0 11.5 11.0 9.0 8.9 92 95 7.0 7.2
Appendix A - 6
Table A-1 (continued)
Secchi disk transparency depth (m)
Date TYB2 TYD2 TYF2 TYH2 TYK2
January 24, 2000 1.6 1.4 1.5 1.2 1.7
February 1, 2000 1.8 1.2 0.4 0.5 0.7
March 8, 2000 1.0 1.0 1.0 1.0 1.2
April 6, 2000 1.4 1.5 1.2 1.1 1.1
May 2, 2000 1.8 1.4 1.2 1.0 1.5
June 12, 2000 2.2 2.2 2.2 1.9 2.1
July 10, 2000 1.8 1.6 1.7 1.3 1.9
August 8, 2000 2.1 2.3 2.0 1.6 1.7
September 5, 2000 2.2 3.0 1.9 1.2 1.9
October 4, 2000 2.7 2.1 1.9 1.9 2.5
November 15, 2000 1.7 1.7 2.0 2.8 2.9
December 5, 2000 2.0 1.9 2.4 3.0 3.0
Appendix A - 7
Table A-2 Water temperature, dissolved oxygen, specific conductance, and pH data
collected from Lake Tillery (Stations TYB2, TYD2, TYF2, TYH2, and
TYK2) during 2002.
January 15, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L) ((DS/cm)
0.2 9.4 9.0 9.1 9.1 9.0 10.7 10.9 10.7 10.8 10.7 78 77 81 79 80 7.5 7.5 7.5 7.4 7.4
1.0 9.4 9.0 9.0 9.0 9.0 10.4 10.8 10.3 10.8 10.6 77 77 81 79 80 7.6 7.5 7.5 7.4 7.4
2.0 8.8 8.9 9.0 8.7 9.0 10.4 10.7 10.2 10.8 10.6 76 76 81 78 80 7.6 7.5 7.4 7.4 7.4
3.0 8.7 8.6 8.5 8.3 8.9 10.4 10.7 10.1 10.7 10.6 76 76 79 78 79 7.6 7.5 7.4 7.4 7.3
4.0 8.7 8.5 8.4 8.2 8.8 10.4 10.6 10.0 10.6 10.7 76 76 79 78 79 7.5 7.5 7.4 7.4 7.4
5.0 8.6 8.5 8.3 8.2 10.3 10.5 9.9 10.6 76 76 79 77 7.5 7.5 7.4 7.4
6.0 8.6 8.5 8.3 8.1 10.3 10.5 9.9 10.6 76 76 79 77 7.5 7.5 7.4 7.3
7.0 8.6 8.5 8.3 8.0 10.2 10.4 9.9 10.5 75 76 79 76 7.5 7.5 7.4 7.3
8.0 8.6 8.5 8.3 8.0 10.1 10.3 9.8 10.4 76 76 79 76 7.5 7.5 7.4 7.3
9.0 8.6 8.4 8.3 10.1 10.2 9.8 76 76 79 7.5 7.5 7.4
10.0 8.6 8.4 8.3 10.1 10.2 9.8 76 76 79 7.5 7.5 7.4
11.0 8.6 8.4 8.3 10.0 10.2 9.8 76 76 79 7.5 7.5 7.4
12.0 8.6 8.4 8.3 10.0 10.2 9.8 76 77 79 7.5 7.5 7.4
13.0 8.6 8.4 8.3 10.0 10.1 9.8 76 77 79 7.5 7.5 7.4
14.0 8.6 8.4 8.3 9.9 10.1 9.7 76 78 79 7.5 7.5 7.3
15.0 8.6 8.3 9.7 9.9 76 78 7.5 7.5
16.0 8.6 8.3 9.6 9.7 76 78 7.5 7.5
17.0 8.5 8.4 9.4 9.0 76 78 7.5 7.4
18.0 8.5 9.3 77 7.5
February 5, 2002
Depth Tempera ture Dissolved oxygen Specific cond uctance pH
(m) (BC) (mg/L ) (OS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 9.0 9.0 7.9 8.0 8.6 10.7 10.5 9.8 11.2 10.9 100 99 101 102 104 7.6 7.5 7.8 7.6 7.5
1.0 9.0 9.0 8.0 8.0 8.6 10.8 10.6 10.6 11.3 11.1 100 99 101 102 104 7.6 7.5 7.8 7.6 7.5
2.0 9.0 9.0 8.0 8.0 8.6 10.8 10.7 11.3 11.4 11.2 100 99 101 102 104 7.6 7.5 7.8 7.6 7.6
3.0 9.0 9.0 7.9 8.0 8.6 10.8 10.8 11.9 11.5 11.4 100 99 101 102 104 7.6 7.5 7.8 7.7 7.6
4.0 9.0 9.0 7.9 8.0 8.6 10.9 10.8 12.1 11.6 11.5 100 99 101 102 104 7.6 7.5 7.7 7.7 7.7
5.0 9.0 9.0 7.9 8.0 11.0 10.9 12.2 11.6 100 99 101 102 7.6 7.6 7.7 7.7
6.0 9.0 9.0 7.9 8.0 11.0 11.0 12.2 11.7 100 99 101 102 7.6 7.6 7.7 7.7
7.0 9.0 9.0 7.9 8.0 11.0 11.0 12.3 11.8 100 99 101 102 7.6 7.6 7.7 7.7
8.0 9.0 9.0 7.9 8.0 11.1 11.0 ND' 11.9 100 99 101 102 7.6 7.6 7.9 7.7
9.0 9.0 9.0 7.9 11.2 11.1 ND 101 99 101 7.5 7.6 7.9
10.0 9.0 9.0 7.9 11.2 11.1 ND 101 99 101 7.5 7.6 7.9
11.0 9.0 9.0 7.9 11.3 11.2 ND 101 99 101 7.5 7.6 7.9
12.0 9.0 9.0 7.9 11.3 11.2 ND 101 99 101 7.5 7.6 7.9
13.0 9.0 9.0 7.9 11.4 11.3 ND 100 99 101 7.5 7.6 7.9
14.0 9.0 9.0 7.9 11.4 11.3 ND 100 99 101 7.5 7.6 7.8
15.0 9.0 8.9 8.2 11.4 11.4 3.1 100 99 115 7.5 7.6 7.7
16.0 9.0 8.9 11.5 11.4 100 99 7.5 7.6
17.0 9.0 8.9 11.5 11.5 100 99 7.5 7.6
18.0 9.0 11.5 100 7.5
Appendix A - 8
Table A-2 (continued)
March 14, 2002
Depth Tempera ture Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L) (CDS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 13.5 14.6 12.0 11.3 12.0 12.4 12.6 11.5 11.0 11.6 102 105 95 95 98 8.1 8.4 7.7 7.4 7.5
1.0 11.4 13.0 11.9 10.8 11.2 12.6 13.1 11.3 11.0 11.7 97 100 95 94 96 8.2 8.6 7.5 7.3 7.4
2.0 11.1 11.0 11.3 10.2 11.0 12.1 12.0 11.2 10.9 11.6 97 98 94 92 96 7.9 8.0 7.4 7.3 7.4
3.0 11.0 10.5 10.5 10.0 10.9 11.6 11.4 10.8 10.8 11.6 98 98 93 92 96 7.7 7.7 7.4 7.2 7.4
4.0 11.0 10.3 10.4 9.9 11.5 11.2 10.7 10.7 99 98 92 92 7.6 7.5 7.2 7.2
5.0 11.0 10.3 10.2 9.9 11.4 11.0 10.4 10.6 99 99 92 92 7.6 7.4 7.1 7.2
6.0 11.0 10.3 10.1 9.9 11.4 10.9 10.3 10.5 99 98 92 92 7.6 7.4 7.1 7.1
7.0 11.0 10.1 10.0 9.9 11.4 10.7 10.3 10.4 99 100 91 92 7.6 7.4 7.1 7.1
8.0 11.0 10.0 9.8 9.9 11.4 10.7 10.1 10.4 99 99 91 92 7.6 7.4 7.1 7.1
9.0 11.0 9.9 9.4 11.4 10.6 9.8 99 99 90 7.6 7.3 7.1
10.0 10.8 9.7 9.2 11.4 10.5 9.4 99 99 91 7.6 7.3 7.1
11.0 10.5 9.7 9.2 11.1 10.4 9.4 98 98 90 7.6 7.3 7.0
12.0 10.0 9.7 9.2 10.7 10.4 9.3 98 98 90 7.5 7.3 7.0
13.0 9.9 9.7 9.2 10.6 10.3 9.3 98 98 90 7.4 7.3 7.0
14.0 9.7 9.6 9.2 10.4 10.3 9.3 97 98 90 7.4 7.3 7.0
15.0 9.5 9.2 10.0 9.6 97 96 7.3 7.2
16.0 9.4 9.0 9.7 9.2 97 92 7.2 7.2
17.0 9.4 8.9 9.2 9.0 96 92 7.2 7.1
18.0 9.3 9.1 97 7.1
April 11, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L) (OS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 17.5 18.5 16.9 15.5 14.3 10.4 10.7 10.7 9.3 9.2 112 114 108 105 102 7.6 8.3 7.8 7.1 7.1
1.0 17.2 17.1 16.7 15.2 14.2 10.4 11.1 10.7 9.3 9.0 111 112 109 105 102 7.8 8.4 7.8 7.0 6.9
2.0 16.8 16.3 15.8 15.0 14.2 10.5 11.4 10.5 9.2 9.0 111 109 106 103 102 7.9 8.4 7.8 7.0 6.9
3.0 16.2 15.8 15.6 14.9 14.2 10.1 10.7 10.3 9.2 9.0 109 109 106 103 102 7.9 7.9 7.6 7.0 6.9
4.0 15.9 15.7 15.5 14.9 9.8 10.2 10.1 9.1 108 107 106 103 7.6 7.7 7.4 6.9
5.0 15.3 15.7 14.9 14.9 9.3 9.7 9.8 9.1 107 108 104 104 7.5 7.5 7.5 6.9
6.0 15.2 15.5 14.4 14.8 8.8 9.3 9.3 9.1 107 108 103 104 7.3 7.4 7.2 6.9
7.0 15.2 15.3 14.2 14.6 8.8 9.1 9.1 9.0 107 106 102 104 7.2 7.3 7.2 7.0
8.0 15.1 15.0 14.0 8.8 8.9 9.0 107 106 102 7.2 7.3 7.1
9.0 14.9 14.8 13.9 8.8 8.8 8.8 106 106 102 7.2 7.3 7.1
10.0 14.8 14.7 13.9 8.7 8.7 8.8 104 105 103 7.2 7.2 7.0
11.0 14.7 14.4 13.9 8.6 8.6 8.8 104 103 102 7.2 7.2 7.0
12.0 14.4 14.1 13.9 8.4 8.4 8.8 104 105 102 7.2 7.2 7.0
13.0 14.2 13.8 13.9 8.3 8.2 8.8 104 103 102 7.1 7.2 7.0
14.0 13.9 13.4 13.9 8.1 7.8 8.8 103 101 102 7.1 7.0 7.0
15.0 13.2 13.0 7.9 7.6 100 101 7.1 7.0
16.0 12.7 12.8 7.5 7.3 100 101 7.0 7.0
17.0 12.3 12.3 6.6 6.7 100 100 6.9 6.9
Appendix A - 9
Table A-2 (continued)
May 14, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L) ((DS/cm)
D2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 22.4 22.8 23.3 22.8 19.0 8.9 9.1 9.8 10.1 9.8 120 120 120 118 106 7.9 7.9 8.3 8.2 7.3
1.0 22.4 22.7 23.3 22.8 18.9 8.9 9.1 9.8 10.3 9.8 120 119 120 118 106 8.1 7.9 8.3 8.4 7.2
2.0 22.4 22.6 23.3 21.8 18.7 8.9 9.0 9.8 9.8 9.8 120 120 120 115 106 8.1 7.9 8.3 8.2 7.2
3.0 22.4 22.5 23.1 21.3 18.6 8.9 8.9 9.6 9.4 9.8 120 120 119 113 105 8.1 7.9 8.2 7.8 7.2
4.0 22.4 22.1 21.9 20.0 8.9 8.6 8.6 8.8 120 118 116 110 8.1 7.7 7.8 7.5
5.0 22.4 22.0 20.1 18.9 8.9 8.3 7.1 8.6 120 118 111 107 8.1 7.6 7.5 7.4
6.0 22.4 21.6 18.9 18.5 8.9 8.1 6.2 8.2 119 118 108 105 8.1 7.5 7.1 7.3
7.0 22.4 21.4 18.2 18.5 8.9 7.8 5.5 8.1 119 117 107 105 8.1 7.4 6.8 6.9
8.0 22.4 20.5 17.9 18.5 8.8 7.0 5.2 8.0 119 116 106 105 8.1 7.2 6.7 6.9
9.0 22.3 19.1 17.9 8.8 5.5 5.1 120 110 106 8.0 7.0 6.7
10.0 22.3 18.3 17.3 8.8 5.2 4.5 119 109 106 8.0 6.8 6.7
11.0 21.7 17.6 17.2 8.1 4.8 4.3 118 107 106 7.7 6.8 6.6
12.0 20.7 17.2 17.1 7.0 4.5 4.0 116 106 106 7.5 6.7 6.6
13.0 18.6 17.1 16.9 5.1 4.3 3.8 110 105 105 7.4 6.7 6.5
14.0 18.2 16.6 16.8 4.9 4.0 3.7 108 103 105 7.1 6.6 6.5
15.0 17.1 16.5 4.4 3.9 106 104 7.0 6.6
16.0 15.8 15.9 3.9 3.5 103 102 6.9 6.6
17.0 15.3 15.0 3.5 2.3 102 103 6.8 6.5
18.0 15.1 15.0 2.9 1.9 101 102 6.6 6.4
June 6, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 26.5 27.9 28.5 28.0 21.1 9.9 10.3 10.6 10.9 7.4 136 143 144 141 119 8.0 8.1 7.9 8.1 7.4
1.0 24.6 28.0 28.5 27.9 21.1 10.3 10.3 10.3 10.9 7.3 132 144 144 141 119 8.0 8.2 8.0 8.1 6.8
2.0 24.1 28.0 28.2 27.7 21.1 10.4 10.4 10.7 10.9 7.2 129 144 143 140 119 7.9 8.2 8.0 8.1 6.8
3.0 22.8 27.2 27.6 27.2 21.1 9.9 9.9 10.2 10.2 7.2 126 140 140 137 119 7.7 8.2 8.0 7.9 6.7
4.0 22.4 22.3 27.3 26.8 8.5 7.3 10.2 9.6 124 122 139 136 7.4 7.2 7.9 7.7
5.0 22.0 21.5 26.2 26.6 7.2 6.5 9.3 9.6 122 121 133 134 7.1 7.0 7.5 7.6
6.0 21.6 21.3 23.9 24.0 6.1 6.1 7.8 8.3 121 120 126 128 6.9 6.9 7.2 7.3
7.0 21.4 20.9 22.4 22.6 5.8 5.5 7.2 7.3 122 120 122 123 6.8 6.9 7.0 7.2
8.0 20.9 20.7 21.6 22.4 5.2 5.4 6.2 7.0 120 118 120 122 6.7 6.8 6.9 7.1
9.0 20.7 20.6 19.8 5.1 5.3 4.6 120 119 117 6.7 6.8 6.8
10.0 20.2 20.2 19.7 4.6 5.2 4.3 120 119 117 6.7 6.8 6.7
11.0 20.0 20.1 19.7 4.5 5.1 4.0 119 119 117 6.6 6.7 6.6
12.0 19.8 19.9 19.6 4.5 5.0 3.9 118 118 117 6.6 6.7 6.6
13.0 19.6 19.6 19.5 4.5 4.9 3.9 117 117 117 6.6 6.7 6.6
14.0 19.4 19.4 19.5 4.6 4.9 3.7 117 116 117 6.6 6.7 6.6
15.0 19.2 19.1 19.5 4.6 4.4 2.2 116 116 118 6.6 6.6 6.5
16.0 19.0 19.0 4.7 4.1 116 115 6.5 6.6
17.0 18.8 18.6 3.9 3.3 115 116 6.5 6.6
18.0 18.1 18.3 2.0 0.3 120 154 6.5 6.6
Appendix A - 10
Table A-2 (continued)
July 1, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 29.5 30.0 30.1 29.8 26.1 10.4 10.3 10.2 10.7 9.0 136 135 134 135 127 9.2 8.7 8.7 8.9 7.3
1.0 28.9 29.3 29.5 29.6 26.0 11.0 10.6 10.5 10.8 8.9 134 133 134 135 127 9.3 9.0 8.9 9.0 7.1
2.0 28.3 29.2 28.8 28.2 25.9 11.7 10.6 10.4 11.1 8.9 132 133 131 132 128 9.3 9.1 8.9 9.0 7.1
3.0 27.9 29.1 28.4 27.5 25.9 11.2 10.5 9.4 9.9 8.9 129 132 126 129 127 9.2 9.1 8.5 8.7 7.1
4.0 27.5 27.2 26.7 26.2 10.0 8.5 7.5 7.5 126 123 124 127 8.9 8.3 8.3 8.2
5.0 26.3 26.3 26.0 25.8 7.0 5.4 5.1 5.8 124 123 124 125 8.5 7.7 7.6 7.8
6.0 25.1 25.1 25.1 25.3 3.0 3.4 4.3 4.5 122 124 124 123 7.3 7.3 7.4 7.3
7.0 24.2 24.3 24.5 24.8 2.0 3.3 4.2 3.8 122 123 123 122 7.3 7.3 7.2 7.2
8.0 23.5 23.5 24.2 23.5 1.4 2.9 4.4 2.8 120 121 123 123 7.1 7.2 7.1 7.1
9.0 23.2 23.0 23.7 1.5 2.6 4.2 119 120 122 6.9 7.1 6.9
10.0 22.8 22.5 23.5 1.0 1.9 3.9 119 119 123 6.8 7.0 6.9
11.0 22.4 22.1 22.8 1.0 1.4 2.3 118 117 124 6.8 6.9 6.8
12.0 22.2 21.7 22.2 1.1 1.1 0.9 117 115 124 6.7 6.8 6.7
13.0 21.8 21.5 21.6 1.0 0.8 0.5 116 114 124 6.7 6.7 6.6
14.0 21.6 21.3 1.0 0.7 114 110 6.7 6.6
15.0 21.2 20.9 0.9 0.6 114 116 6.6 6.6
16.0 21.0 20.6 0.8 0.4 114 123 6.6 6.6
17.0 20.5 20.2 0.8 0.3 115 123 6.6 6.3
18.0 19.6 0.5 127 6.6
August 27, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 29.2 29.0 28.6 28.4 26.6 7.6 7.5 7.0 8.4 5.0 131 130 137 141 149 7.6 7.4 7.3 7.3 6.9
1.0 29.2 29.0 28.6 28.4 26.6 7.5 7.5 7.0 8.2 5.0 131 131 138 141 149 7.7 7.5 7.4 7.5 6.9
2.0 29.2 29.0 28.6 28.3 26.6 7.5 7.5 7.0 7.5 5.0 131 131 137 141 150 7.7 7.5 7.4 7.5 6.9
3.0 29.2 29.0 28.4 28.2 26.6 7.4 7.4 6.5 7.2 5.0 131 130 137 141 150 7.7 7.5 7.3 7.4 6.9
4.0 29.2 29.0 28.1 27.5 7.4 7.3 4.3 4.6 131 129 139 145 7.6 7.5 7.2 7.5
5.0 29.2 29.0 27.8 27.4 7.2 7.2 2.8 3.9 131 130 140 146 7.6 7.5 7.0 7.1
6.0 29.1 28.8 27.4 27.3 7.1 5.3 1.6 3.6 130 131 141 146 7.6 7.4 6.9 7.0
7.0 28.9 28.7 27.2 27.2 6.4 4.4 1.0 3.3 130 131 142 147 7.5 7.2 6.8 6.9
8.0 27.7 27.9 26.9 0.3 1.3 0.4 133 132 141 7.0 7.0 6.8
9.0 27.3 27.5 26.6 0.2 0.5 0.2 135 135 141 6.9 6.9 6.7
10.0 26.9 27.0 26.2 0.3 0.3 0.2 136 137 143 6.8 6.8 6.7
11.0 26.4 26.5 26.0 0.2 0.3 0.2 137 139 143 6.8 6.8 6.7
12.0 26.0 26.4 25.6 0.2 0.2 0.2 136 138 147 6.7 6.7 6.7
13.0 25.7 26.0 25.4 0.2 0.3 0.2 136 141 149 6.6 6.7 6.7
14.0 25.4 25.4 25.3 0.2 0.2 0.2 134 143 149 6.6 6.7 6.7
15.0 24.8 25.3 0.2 0.2 135 141 6.6 6.7
16.0 24.3 24.8 0.2 0.2 140 142 6.6 6.7
17.0 24.0 24.3 0.2 0.2 141 150 6.6 6.7
18.0 23.2 0.2 149 6.6
Appendix A - 11
Table A-2 (continued)
Sep tember 24, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (BC) (mg/ L) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 26.6 26.4 26.2 26.3 25.4 8.4 7.6 7.0 8.4 5.5 125 125 126 124 150 7.8 7.4 7.5 7.7 7.2
1.0 26.6 26.3 26.2 26.3 25.2 8.3 7.6 6.9 8.4 5.3 125 125 126 125 149 7.9 7.5 7.5 7.8 7.2
2.0 26.5 26.2 26.1 26.3 24.5 8.2 7.1 6.9 8.3 4.7 125 124 125 125 148 7.9 7.5 7.5 7.8 7.2
3.0 26.3 26.1 26.1 26.3 24.5 8.1 6.7 6.9 8.3 4.5 124 123 126 125 147 7.9 7.4 7.5 7.8 7.1
4.0 26.3 26.1 26.0 26.3 7.9 6.6 6.3 8.3 124 125 125 124 7.8 7.4 7.4 7.7
5.0 26.2 26.1 26.0 25.9 7.7 6.3 6.3 6.6 124 125 125 123 7.7 7.3 7.3 7.5
6.0 26.2 26.0 25.9 25.2 7.4 6.2 5.4 3.4 124 125 126 113 7.6 7.3 7.3 7.2
7.0 26.1 26.0 25.8 24.9 7.4 6.0 4.5 2.8 124 126 126 106 7.6 7.3 7.2 7.0
8.0 26.1 26.0 25.4 7.6 6.0 1.9 124 125 129 7.6 7.3 7.0
9.0 26.1 26.0 25.3 7.7 5.8 1.2 124 124 129 7.6 7.3 6.9
10.0 26.0 25.9 25.1 6.9 3.6 0.9 124 125 126 7.5 7.2 6.8
11.0 25.8 25.8 24.9 3.8 3.0 1.0 125 125 120 7.3 7.0 6.8
12.0 25.2 25.1 24.8 0.3 0.4 1.1 128 128 115 7.0 6.9 6.7
13.0 24.9 24.7 24.3 0.3 0.2 1.5 129 127 100 6.8 6.8 6.8
14.0 24.4 24.4 24.0 0.2 0.3 1.3 127 122 92 6.8 6.8 6.7
15.0 24.0 24.2 23.9 0.2 0.9 0.7 121 111 96 6.8 6.7 6.6
16.0 23.7 23.8 0.2 0.2 118 120 6.7 6.8
17.0 23.2 23.2 0.2 0.2 120 128 6.7 6.8
October 29, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (BC) (mg/L ) ( (DS/cm )
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 19.5 19.4 18.6 18.4 19.1 6.4 6.7 8.0 7.2 6.8 102 103 126 124 131 7.2 7.1 7.0 7.1 7.0
1.0 19.5 19.5 18.8 18.4 19.1 6.4 6.5 7.0 7.1 6.8 102 103 127 124 131 7.1 7.1 7.0 7.0 7.0
2.0 19.6 19.5 18.8 18.5 19.1 6.4 6.5 6.9 7.1 6.8 102 103 127 124 131 7.0 7.0 7.0 7.0 6.9
3.0 19.6 19.5 18.8 18.5 19.1 6.4 6.4 6.8 7.1 6.8 102 103 127 124 131 7.0 7.0 7.0 7.0 6.9
4.0 19.6 19.5 18.8 18.5 6.4 6.4 6.8 7.1 102 104 127 124 7.0 7.0 6.9 6.9
5.0 19.6 19.5 18.8 18.5 6.4 6.4 6.8 7.1 102 104 127 124 7.0 6.9 6.9 6.9
6.0 19.6 19.5 18.8 18.5 6.4 6.4 6.8 7.1 102 105 127 124 6.9 6.9 6.9 6.9
7.0 19.6 19.5 18.8 18.5 6.4 6.4 6.8 7.0 101 104 127 122 6.9 6.9 6.9 6.9
8.0 19.6 19.5 18.8 18.5 6.4 6.4 6.8 7.0 102 102 127 124 7.0 7.0 6.9 6.9
9.0 19.6 19.5 18.8 6.4 6.4 6.8 102 104 127 6.9 6.9 6.9
10.0 19.6 19.5 18.8 6.4 6.4 6.8 102 104 127 6.9 6.9 6.9
11.0 19.6 19.5 18.8 6.4 6.4 6.8 102 104 127 6.9 6.9 6.9
12.0 19.5 19.5 18.8 6.4 6.4 6.8 102 104 127 6.9 6.9 6.9
13.0 19.5 19.4 18.8 6.4 6.3 6.8 102 111 127 6.9 6.9 6.9
14.0 19.5 19.2 18.8 6.3 6.1 6.8 104 118 79 6.9 6.8 7.4
15.0 19.5 19.1 6.3 5.6 104 123 6.9 6.8
16.0 19.4 19.1 6.1 5.5 110 123 6.8 6.8
17.0 19.4 19.1 5.9 0.2 113 123 6.8 6.8
18.0 19.4 19.1 5.6 0.2 117 142 6.8 6.8
Appendix A - 12
Table A-2 (continued)
November 19, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L ) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 16.8 15.2 13.7 14.1 14.3 8.5 8.7 9.4 9.4 8.2 105 102 91 97 99 7.4 7.3 7.7 7.6 7.5
1.0 16.4 15.2 13.8 14.0 14.3 8.4 8.5 9.3 8.8 8.0 103 102 91 98 99 7.4 7.3 7.6 7.5 7.2
2.0 16.2 14.9 13.8 13.9 14.3 8.1 8.5 9.3 8.8 8.0 103 100 91 97 99 7.2 7.3 7.5 7.4 7.0
3.0 16.2 14.8 13.8 13.9 14.3 8.1 8.6 9.3 8.7 8.0 103 99 91 99 99 7.2 7.3 7.4 7.3 7.0
4.0 16.2 14.7 13.8 13.7 8.1 8.6 9.3 8.8 103 99 92 96 7.2 7.2 7.4 7.3
5.0 16.2 14.6 13.8 13.5 8.0 8.6 9.3 9.1 103 99 92 92 7.2 7.2 7.3 7.3
6.0 16.2 14.6 13.8 13.5 8.0 8.6 9.3 9.0 103 100 91 96 7.1 7.2 7.3 7.2
7.0 16.2 14.5 13.8 13.3 8.0 8.5 9.3 9.3 103 98 91 91 7.1 7.1 7.2 7.1
8.0 16.2 14.2 13.8 13.3 8.0 8.5 9.3 9.4 104 99 91 90 7.1 7.1 7.2 7.1
9.0 16.2 14.2 13.8 8.0 8.5 9.2 104 97 92 7.1 7.1 7.1
10.0 16.1 14.1 13.8 8.0 8.5 9.3 104 96 91 7.1 7.1 7.1
11.0 16.1 14.1 13.8 8.0 8.5 9.3 104 96 92 7.1 7.0 7.1
12.0 16.1 14.0 13.8 8.0 8.5 9.2 104 95 91 7.1 7.0 7.1
13.0 16.1 14.0 13.8 8.0 8.7 9.3 104 94 91 7.1 7.0 7.1
14.0 16.0 14.0 13.8 8.0 8.7 9.3 104 92 79 7.1 7.0 7.4
15.0 16.0 14.0 8.1 8.7 103 94 7.1 7.0
16.0 16.0 14.0 8.1 8.7 103 94 7.1 7.0
17.0 16.0 14.0 8.1 8.7 103 94 7.0 7.0
18.0 16.0 8.0 103 7.0
December 18, 2002
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (HC) (mg/L ) ((DS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 8.4 8.9 7.7 7.4 7.3 9.6 10.2 10.5 11.3 10.6 70 72 72 71 73 7.0 7.1 7.2 7.1 7.0
1.0 8.3 8.4 7.6 7.3 7.4 9.6 9.6 10.4 11.3 10.5 70 71 72 71 73 7.0 7.0 7.1 7.1 7.0
2.0 8.3 8.2 7.5 7.3 7.4 9.6 9.5 10.4 11.2 10.5 70 70 72 71 73 6.9 7.0 7.1 7.0 7.0
3.0 8.2 8.1 7.4 7.3 7.4 9.5 9.5 10.4 11.1 10.5 70 68 72 71 73 6.9 7.0 7.1 7.0 7.0
4.0 8.2 8.0 7.4 7.3 9.5 9.7 10.4 11.1 70 67 72 71 6.9 6.9 7.0 7.0
5.0 8.2 8.0 7.3 7.3 9.5 9.8 10.5 11.1 70 67 72 71 6.9 6.9 7.0 7.0
6.0 8.2 7.9 7.3 7.3 9.5 9.8 10.5 11.0 70 67 72 71 6.9 6.9 7.0 7.0
7.0 8.2 7.9 7.2 7.3 9.5 10.4 10.5 10.9 70 70 72 71 6.9 6.9 7.0 7.0
8.0 8.2 7.9 7.2 7.3 9.5 10.8 10.4 10.9 70 72 72 71 6.9 6.9 7.0 7.0
9.0 8.2 7.9 7.1 9.5 11.1 10.4 70 71 72 6.9 6.9 7.0
10.0 8.2 7.9 7.1 9.5 11.3 10.4 70 70 72 6.9 6.9 7.0
11.0 8.2 7.8 7.1 9.5 11.4 10.4 70 70 72 6.9 6.9 7.0
12.0 8.2 7.8 7.1 9.5 11.4 10.5 70 70 72 6.9 6.9 7.0
13.0 8.2 7.8 7.1 9.5 11.4 10.5 70 70 72 6.9 6.9 7.0
14.0 8.2 7.8 7.4 9.5 11.5 10.5 70 70 79 6.9 6.9 7.4
15.0 8.2 7.8 9.5 11.5 70 71 6.9 6.9
16.0 8.1 7.8 9.6 11.5 68 70 6.9 6.9
17.0 8.1 7.8 9.6 9.7 67 71 6.9 6.9
18.0 8.1 9.6 68 6.9
Appendix A - 13
Table A-2 (continued)
Secchi disk transparency depth (m)
Date TYB2 TYD2 TYF2 TYH2 TYK2
January 15, 2002 2.2 1.8 2.5 2.3 2.2
February 5, 2002 0.9 1.0 1.2 1.5 1.2
March 14, 2002 1.3 1.4 1.3 1.2 1.3
April 11, 2002 1.7 1.3 1.4 1.5 1.4
May 14, 2002 1.9 1.4 1.3 1.1 1.7
June 6, 2002 1.5 1.3 1.5 1.4 3.0'
July 1, 2002 2.1 2.0 1.6 1.5 1.9
August 27, 2002 2.7 3.0 2.1 1.5 1.6
September 24, 2002 2.8 2.7 1.8 1.3 3.0'
October 29, 2002 1.7 2.3 1.8 1.6 2.3
November 14, 2002 2.1 1.2 0.7 1.0 1.0
December 18, 2002 1.0 1.1 1.2 1.1 1.2
Missing data due to either measurements were not obtained during sampling or because the Secchi disk was
observed on river or lake bottom during sampling. In such instances, the depth of the lake bottom is listed as a
reference to Secchi depth.
Appendix A - 14
Table A-3 Water temperature, dissolved oxygen, specific conductance, and pH data
collected from Lake Tillery (Stations TYB2, TYD2, TYF2, TYH2, and
TYK2) during 2004.
January 19, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 6.5 6.5 6.5 6.3 6.6 11.8 11.6 11.8 12.3 12.5 85 86 87 91 87 7.4 7.4 7.4 7.5 7.4
1.0 6.5 6.5 6.5 6.2 6.6 11.8 11.6 11.8 12.3 12.3 85 86 87 91 87 7.4 7.4 7.4 7.5 7.3
2.0 6.5 6.5 6.5 5.8 6.6 11.8 11.6 11.8 12.5 12.3 85 87 87 93 87 7.4 7.4 7.4 7.6 7.3
3.0 6.5 6.5 6.5 5.8 6.6 11.8 11.6 11.8 12.5 12.3 85 87 87 93 87 7.4 7.4 7.4 7.6 7.3
4.0 6.5 6.4 6.5 5.8 11.8 11.6 11.8 12.5 86 87 87 93 7.4 7.3 7.4 7.6
5.0 6.5 6.4 6.5 5.8 11.8 11.6 11.8 12.5 86 87 87 93 7.4 7.3 7.4 7.5
6.0 6.5 6.4 6.4 5.8 11.8 11.6 11.8 12.5 86 87 87 93 7.4 7.3 7.4 7.5
7.0 6.5 6.4 6.4 5.8 11.8 11.6 11.8 12.5 86 87 87 93 7.4 7.3 7.4 7.5
8.0 6.5 6.4 6.4 5.8 11.7 11.6 11.8 12.5 86 87 87 93 7.3 7.3 7.4 7.5
9.0 6.5 6.4 6.4 11.7 11.6 11.8 86 87 87 7.3 7.3 7.4
10.0 6.5 6.4 6.4 11.7 11.6 11.8 86 87 87 7.3 7.3 7.4
11.0 6.5 6.4 6.4 11.7 11.6 11.8 86 87 87 7.3 7.3 7.4
12.0 6.5 6.4 6.4 11.7 11.5 11.7 86 87 87 7.3 7.3 7.4
13.0 6.5 6.4 6.4 11.7 11.5 11.7 86 87 88 7.3 7.3 7.4
14.0 6.5 6.4 6.4 11.7 11.5 11.7 86 87 88 7.3 7.3 7.4
15.0 6.5 6.4 6.4 11.7 11.5 11.7 86 87 88 7.3 7.3 7.4
16.0 6.5 6.4 11.7 11.5 86 87 7.3 7.3
17.0 6.6 6.4 8.4 11.5 86 87 6.8 7.3
February 23, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
1.0 6.1 6.1 6.3 6.0 5.5 12.4 12.2 11.9 11.9 12.1 95 95 93 93 91 7.8 7.6 7.5 7.4 7.4
2.0 6.1 6.2 6.3 5.9 5.5 12.3 12.1 11.8 11.8 12.0 95 95 93 93 91 7.8 7.6 7.5 7.4 7.3
3.0 6.1 6.1 6.3 5.8 5.5 12.2 12.1 11.8 11.8 12.0 94 97 93 91 91 7.8 7.6 7.5 7.4 7.3
4.0 6.0 6.0 6.6 5.8 12.1 12.1 11.7 11.8 96 97 93 92 7.7 7.6 7.4 7.4
5.0 6.0 6.0 6.4 5.7 12.1 12.0 11.8 11.8 94 93 93 92 7.7 7.6 7.4 7.4
6.0 5.9 5.9 6.4 5.7 12.0 12.0 11.8 11.7 94 99 93 92 7.7 7.5 7.4 7.4
7.0 5.9 5.9 6.2 5.7 11.9 11.9 11.8 11.7 98 94 94 92 7.6 7.5 7.4 7.4
8.0 5.9 5.9 6.3 11.9 11.9 11.7 96 96 92 7.6 7.5 7.4
9.0 5.9 5.9 6.3 11.8 11.9 11.7 95 96 93 7.6 7.5 7.4
10.0 5.9 5.9 6.3 11.8 11.9 11.7 98 93 92 7.6 7.5 7.4
11.0 5.9 5.9 6.3 11.8 11.9 11.7 95 96 92 7.6 7.5 7.4
12.0 5.9 5.9 6.3 11.8 11.9 11.7 96 98 93 7.6 7.5 7.4
13.0 5.9 5.8 6.2 11.7 11.9 11.7 96 98 94 7.5 7.5 7.4
14.0 5.9 5.8 6.2 11.7 11.8 11.7 96 96 94 7.5 7.5 7.4
15.0 5.9 5.8 6.2 11.6 11.8 11.7 99 98 94 7.5 7.5 7.3
16.0 5.9 5.8 11.7 11.8 98 98 7.5 7.5
17.0 5.9 5.8 11.7 11.7 95 95 7.5 7.4
Appendix A - 15
Table A-3 (continued)
March 17, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° C) (mg/L) ( µS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 10.6 10.6 10.1 9.4 9.0 12.2 11.7 12.2 11.1 12.1 90 52 95 94 95 8.3 7.5 7.8 7.4 7.6
1.0 10.6 10.4 10.1 9.3 9.0 12.3 11.7 12.2 11.4 12.0 90 86 95 94 95 8.1 7.5 7.7 7.5 7.5
2.0 10.6 10.2 10.0 9.3 9.0 12.3 11.7 12.2 11.4 11.9 90 92 95 94 95 8.1 7.5 7.7 7.5 7.5
3.0 10.5 9.9 10.0 9.2 9.0 12.3 11.5 12.1 11.4 11.9 90 91 94 94 92 8.1 7.5 7.7 7.5 7.5
4.0 10.3 9.8 10.0 9.2 12.2 11.5 12.0 11.4 90 91 94 89 8.0 7.5 7.7 7.5
5.0 10.2 9.6 9.9 9.2 12.1 11.4 12.0 11.4 89 92 94 95 8.0 7.5 7.7 7.5
6.0 10.1 9.5 9.9 9.2 12.0 11.3 11.8 11.3 91 91 86 95 8.0 7.5 7.6 7.5
7.0 10.1 9.4 9.9 9.2 11.9 11.2 11.9 11.4 89 90 96 93 8.0 7.5 7.6 7.5
8.0 9.6 9.3 9.8 9.2 11.8 11.1 11.9 11.3 92 90 96 95 7.9 7.5 7.6 7.5
9.0 9.3 9.1 9.9 11.6 11.1 11.9 90 90 93 7.9 7.5 7.6
10.0 9.1 9.0 9.7 11.4 11.0 11.9 89 86 95 7.9 7.5 7.5
11.0 8.9 8.9 9.7 11.3 11.0 11.8 91 91 96 7.8 7.5 7.5
12.0 8.9 8.8 9.5 11.2 10.9 11.8 90 91 94 7.8 7.5 7.5
13.0 8.7 8.7 9.4 11.1 10.8 11.7 90 93 94 7.7 7.6 7.5
14.0 8.7 8.6 9.4 11.0 10.8 11.7 93 92 94 7.7 7.6 7.5
15.0 8.7 8.5 9.4 11.0 10.7 11.6 92 91 95 7.7 7.6 7.5
16.0 8.7 8.5 10.9 10.8 90 92 7.7 7.6
April 6, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 13.1 12.2 12.6 12.5 12.5 11.0 10.6 10.5 10.7 11.6 94 96 99 98 98 8.2 7.7 7.7 7.6 7.7
1.0 13.1 12.2 12.5 12.3 12.4 11.0 10.6 10.5 10.7 11.5 94 95 98 98 99 8.2 7.7 7.7 7.6 7.7
2.0 13.1 12.2 12.4 12.1 12.4 11.0 10.5 10.4 10.7 11.5 94 96 96 98 98 8.2 7.7 7.6 7.6 7.6
3.0 13.1 12.2 12.3 12.1 12.4 11.0 10.5 10.4 10.7 11.4 95 95 97 98 98 8.1 7.6 7.6 7.6 7.6
4.0 13.1 12.2 12.3 12.1 11.0 10.5 10.3 10.6 95 95 98 98 8.1 7.6 7.6 7.6
5.0 13.1 12.2 12.2 12.1 10.9 10.5 10.3 10.6 93 95 98 97 8.1 7.6 7.6 7.6
6.0 13.1 12.2 12.1 12.0 10.9 10.5 10.2 10.6 93 95 96 97 8.0 7.6 7.6 7.6
7.0 13.1 12.2 11.9 12.0 11.0 10.5 10.1 10.6 95 95 98 99 8.0 7.6 7.5 7.6
8.0 13.1 12.2 11.6 12.0 11.0 10.5 9.9 10.6 95 95 95 99 8.0 7.6 7.5 7.6
9.0 13.1 12.2 11.3 11.0 10.5 9.8 94 97 95 8.0 7.6 7.5
10.0 13.1 12.2 11.1 10.9 10.5 9.6 94 97 97 8.0 7.6 7.4
11.0 12.9 12.1 11.1 10.9 10.4 9.5 94 95 94 7.9 7.6 7.4
12.0 12.5 12.1 11.1 10.5 10.3 9.5 94 94 97 7.9 7.6 7.4
13.0 12.3 12.1 11.1 10.3 10.3 9.4 95 95 97 7.8 7.6 7.3
14.0 12.2 11.8 11.0 10.2 10.1 9.3 94 93 94 7.8 7.5 7.3
15.0 11.9 11.7 10.8 9.9 9.8 9.2 95 95 93 7.7 7.5 7.3
16.0 11.7 11.1 9.7 9.7 94 95 7.6 7.5
17.0 11.5 10.9 9.7 9.4 95 94 7.6 7.3
18.0 11.4 9.5 93 7.5
Appendix A - 16
Table A-3 (continued)
May 11, 2004
Depth Tempera ture Dissolved oxygen Specific conductance pH
(m) (° C) (mg/L) ( µS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 25.2 26.0 25.8 22.6 18.5 10.8 9.8 11.4 9.7 8.5 93 93 93 93 94 8.8 9.0 9.1 7.7 7.2
1.0 25.0 26.0 25.6 22.2 18.5 10.9 10.9 11.3 9.8 8.1 93 93 93 93 95 8.8 9.1 9.0 7.6 7.2
2.0 23.1 25.4 24.9 21.2 18.5 11.2 11.2 11.2 9.3 8.1 92 93 92 94 95 8.6 9.0 8.8 7.5 7.1
3.0 21.8 20.1 23.7 20.4 11.1 9.0 10.7 8.8 92 92 91 93 8.2 8.0 8.3 7.4
4.0 20.7 19.7 21.5 19.3 10.9 8.1 10.5 8.6 92 92 92 94 7.9 7.6 8.0 7.3
5.0 20.3 19.0 20.5 19.2 10.8 8.0 8.8 8.3 92 93 93 93 8.2 7.9 7.6 7.3
6.0 19.6 18.3 19.7 19.2 10.5 7.6 8.3 8.1 93 92 93 93 8.1 7.7 7.4 7.2
7.0 19.3 18.2 19.7 19.1 9.3 7.4 8.1 8.2 92 92 92 94 7.9 7.6 7.3 7.2
8.0 18.9 18.0 19.6 19.1 8.1 7.3 8.1 8.0 93 92 93 94 7.6 7.5 7.2 7.1
9.0 18.5 17.9 19.5 7.8 7.3 8.0 91 93 93 7.5 7.6 7.1
10.0 18.2 17.8 19.2 7.2 7.3 7.9 92 93 93 7.3 7.4 7.1
11.0 17.9 17.6 19.1 7.1 7.3 7.7 91 92 92 7.3 7.3 7.1
12.0 17.7 17.4 18.4 7.2 7.3 7.4 92 92 94 7.1 7.2 7.0
13.0 17.6 17.3 18.3 7.2 7.2 7.1 92 93 93 7.1 7.1 7.0
14.0 17.4 16.9 18.2 7.3 6.8 6.8 92 92 93 7.1 7.1 7.0
15.0 17.0 16.5 7.2 6.6 92 93 7.1 7.0
16.0 16.8 15.8 7.1 5.6 93 95 7.1 7.0
17.0 16.5 15.6 6.8 4.8 93 96 7.0 6.9
18.0 16.2 6.4 94 7.0
June 22, 2004
Depth Tempera ture Dissolved oxygen Specific conductance pH
0.2 27.8 28.0 27.5 26.2 24.2 13.8 14.1 14.4 14.5 7.2 92 92 94 98 101 8.7 8.5 8.1 7.6 7.0
1.0 27.8 28.0 27.5 26.1 24.2 13.8 14.2 14.4 14.3 7.0 92 92 94 99 102 8.6 8.5 8.0 7.4 6.9
2.0 27.8 28.0 27.5 25.5 24.2 13.6 14.0 14.2 13.4 7.0 92 91 92 98 101 8.5 8.2 7.9 7.2 6.8
3.0 27.7 28.0 27.4 24.2 13.4 13.1 13.9 9.9 92 90 93 101 8.2 7.9 7.7 6.9
4.0 27.1 27.8 26.4 24.2 9.8 12.6 11.5 8.8 94 92 96 101 7.9 7.7 7.3 6.7
5.0 26.3 27.2 26.0 24.1 6.7 11.7 10.3 8.4 94 92 97 101 6.9 7.5 7.1 6.6
6.0 25.0 24.7 25.5 24.1 5.7 6.7 9.3 8.2 96 98 98 101 6.8 7.0 6.9 6.6
7.0 24.3 24.3 25.0 24.1 4.8 6.0 8.0 8.1 97 97 99 101 6.8 6.9 6.7 6.6
8.0 24.0 23.8 24.7 24.1 4.4 5.5 7.6 8.0 97 99 100 100 6.5 6.9 6.6 6.6
9.0 23.8 23.7 24.6 4.1 5.2 7.1 98 101 100 6.5 6.9 6.6
10.0 23.7 23.3 24.5 3.7 4.9 6.9 96 100 102 6.4 6.7 6.6
11.0 23.3 23.2 24.4 3.3 4.4 6.4 100 98 100 6.4 6.6 6.5
12.0 23.1 23.0 24.4 3.3 3.6 6.4 97 99 99 6.4 6.6 6.5
13.0 22.9 22.9 24.2 3.2 3.4 5.8 98 97 101 6.3 6.4 6.5
14.0 22.5 22.5 24.1 2.5 3.1 5.2 98 99 102 6.5 6.4 6.5
15.0 22.3 22.1 24.1 2.3 2.4 5.0 99 99 101 6.3 6.3 6.5
16.0 21.9 21.8 2.1 1.7 100 101 6.3 6.4
17.0 21.4 21.3 1.3 1.6 99 105 6.3 6.3
18.0 20.3 0.7 108 6.3
Appendix A - 17
Table A-3 (continued)
July 13, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° C) (mg/L) ( µS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
Q2 30.6 31.1 31.1 29.9 26.8 9.1 9.2 10.0 9.6 4.8 93 93 96 98 98 8.8 8.8 8.9 8.4 7.4
1.0 29.4 30.2 31.0 29.4 26.8 9.3 9.0 9.9 8.8 4.7 93 92 96 97 98 8.7 8.7 8.9 7.5 7.2
2.0 29.1 29.9 30.8 28.6 26.8 9.5 8.0 9.6 7.8 4.7 93 92 95 99 98 8.7 8.3 8.8 7.2 7.1
3.0 28.6 29.8 30.1 27.8 26.8 8.6 7.1 9.0 5.9 4.7 92 90 94 99 98 8.4 7.9 8.6 7.0 7.0
4.0 28.2 28.0 29.5 27.1 6.0 4.5 7.2 4.9 94 96 96 99 7.8 7.6 7.8 7.0
5.0 27.4 27.1 28.4 27.1 3.8 3.4 5.3 4.8 96 99 98 99 7.4 7.3 7.5 7.0
6.0 27.0 26.3 27.6 27.0 2.8 2.3 4.2 4.8 98 99 99 99 7.2 7.1 7.2 7.1
7.0 26.9 26.1 26.9 27.0 2.4 1.9 2.9 4.8 98 100 100 99 7.1 6.9 7.0 7.1
8.0 26.6 26.1 26.6 27.0 2.1 1.8 2.3 4.9 98 100 101 99 7.0 6.8 6.9 7.4
9.0 26.5 25.9 26.2 1.8 1.9 1.8 98 99 101 6.9 7.1 6.8
10.0 26.3 25.8 26.0 1.8 1.7 1.6 99 99 102 6.9 6.9 6.8
11.0 26.0 25.6 25.7 1.6 1.6 1.3 99 100 102 6.8 7.1 6.7
12.0 25.8 25.5 25.6 1.5 1.5 1.2 99 100 103 6.8 6.9 6.7
13.0 25.6 25.3 25.6 1.6 1.5 1.1 99 100 103 6.8 6.7 6.7
14.0 25.4 25.1 25.4 1.2 0.4 0.9 100 146 104 6.7 6.9 6.7
15.0 25.2 1.1 100 6.7
16.0 25.0 1.1 100 6.7
17.0 24.6 0.5 102 6.7
18.0 24.1 0.1 108 6.7
Aug ust 24, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) C C) (mg/L) (µS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 29.3 30.4 29.5 29.4 26.9 10.2 10.0 11.4 10.4 7.3 98 99 99 100 100 8.7 8.8 9.0 8.3 7.2
1.0 27.9 28.8 29.1 29.0 26.9 10.6 10.6 11.5 9.2 7.0 98 98 99 99 100 8.8 8.9 9.0 7.8 7.1
2.0 27.6 28.3 28.1 27.4 26.8 10.2 10.8 11.1 8.5 6.9 98 98 99 99 100 8.8 9.0 8.9 7.7 7.1
3.0 27.4 27.7 27.9 26.9 26.8 9.6 9.2 9.5 6.6 6.9 98 97 98 100 100 8.7 8.6 8.6 7.6 7.0
4.0 27.4 27.4 27.7 26.8 9.0 8.2 7.8 5.9 97 97 98 100 8.5 8.3 8.1 7.4
5.0 27.3 27.4 27.4 26.8 8.5 8.0 6.1 5.4 97 97 98 100 8.3 8.3 7.7 7.1
6.0 27.3 27.2 27.0 26.6 8.0 7.3 4.9 5.1 97 97 99 100 8.1 8.2 7.5 7.1
7.0 27.2 26.9 26.6 26.5 6.7 5.4 3.7 4.9 97 98 99 101 7.9 8.0 7.3 7.1
8.0 27.0 26.7 26.4 26.2 4.6 4.6 3.2 2.1 98 97 99 104 7.7 8.0 7.2 6.9
9.0 26.4 26.5 26.3 2.8 3.4 3.0 97 97 99 7.8 7.9 7.1
10.0 26.3 26.4 26.2 2.8 3.0 2.8 96 97 100 7.6 7.7 7.0
11.0 26.1 26.2 26.1 2.4 2.8 2.5 97 97 100 7.4 7.7 7.0
12.0 26.0 26.0 26.1 2.5 2.7 2.4 97 97 100 7.3 7.6 6.9
13.0 25.8 26.0 26.0 2.4 2.3 1.8 97 98 102 7.2 7.3 6.9
14.0 25.6 25.9 25.9 2.3 2.2 1.4 97 99 103 7.1 7.2 6.9
15.0 25.6 25.6 25.8 1.9 1.1 1.0 98 101 105 7.0 7.1 6.8
16.0 25.5 25.6 1.7 1.0 98 102 7.0 7.1
17.0 25.4 25.4 1.0 0.7 101 106 6.9 7.0
18.0 25.3 0.2 107 6.8
Appendix A - 18
Table A-3 (continued)
September 21, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° C) (mg/L) (µS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 24.3 24.1 23.7 23.7 23.5 7.0 6.4 6.5 6.5 7.0 96 91 87 84 84 7.6 7.1 7.2 7.0 7.1
1.0 24.3 24.1 23.6 23.6 23.5 6.6 6.2 6.5 6.5 6.9 96 91 87 84 84 7.4 7.1 7.2 7.0 7.0
2.0 24.1 23.8 23.3 23.6 23.5 6.5 5.8 6.3 6.5 6.9 95 91 87 84 84 7.4 7.1 7.2 7.0 7.0
3.0 24.0 23.8 23.2 23.6 23.5 6.2 5.8 6.1 6.5 6.9 95 91 87 84 84 7.3 7.1 7.1 7.0 7.0
4.0 24.0 23.7 23.1 23.6 6.0 5.9 6.0 6.5 95 90 87 84 7.3 7.1 7.1 7.0
5.0 24.0 23.7 23.1 23.6 5.9 6.1 5.9 6.4 95 91 87 84 7.3 7.1 7.1 7.0
6.0 23.9 23.7 23.1 23.3 5.9 6.1 5.9 6.1 96 91 87 84 7.2 7.1 7.1 7.0
7.0 23.9 23.7 23.1 23.2 5.9 6.1 5.9 6.0 96 91 87 84 7.2 7.1 7.0 7.0
8.0 23.9 23.7 23.1 22.8 5.9 6.0 5.9 5.8 96 91 87 85 7.2 7.1 7.0 7.1
9.0 23.9 23.6 23.1 5.9 5.9 5.9 96 90 87 7.2 7.1 7.0
10.0 23.9 23.6 23.1 5.9 5.6 5.9 96 89 87 7.2 7.0 7.0
11.0 23.9 23.5 23.0 5.9 5.6 5.9 96 89 87 7.2 7.0 7.0
12.0 23.9 23.5 23.0 5.9 5.5 5.9 96 89 87 7.2 7.0 7.0
13.0 23.9 23.5 23.1 5.9 5.4 5.9 96 90 87 7.2 7.0 7.0
14.0 23.9 23.4 23.0 5.9 5.2 5.8 96 89 87 7.2 7.0 7.0
15.0 23.9 23.3 23.0 5.9 5.1 5.8 96 89 88 7.2 7.0 7.0
16.0 23.8 23.3 6.0 5.1 96 89 7.2 7.0
17.0 23.7 23.3 5.9 5.0 96 88 7.1 7.0
18.0 23.7 5.8 96 7.0
October 19, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) C C) (mg/L) (µS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 21.4 21.4 21.0 20.9 20.5 7.0 7.6 7.3 6.3 6.4 78 76 74 75 76 7.3 7.0 7.2 6.8 6.8
1.0 21.3 21.4 20.9 20.9 20.5 7.0 7.6 7.0 6.3 6.4 78 76 74 75 76 7.3 7.0 7.1 6.8 6.8
2.0 21.2 21.4 20.8 20.9 20.5 6.9 7.5 6.8 6.2 6.3 78 76 74 75 76 7.2 7.0 7.0 6.8 6.8
3.0 21.1 21.3 20.6 20.8 20.5 6.7 7.5 6.1 6.2 6.3 78 76 74 75 76 7.2 7.0 7.0 6.8 6.8
4.0 21.0 21.3 20.6 20.7 6.6 7.4 6.1 6.1 78 76 74 75 7.2 7.0 6.9 6.8
5.0 21.0 21.3 20.6 20.5 6.6 7.4 6.0 6.2 78 76 74 75 7.1 7.0 6.9 6.8
6.0 21.0 21.3 20.5 20.5 6.6 7.3 5.9 6.2 78 76 74 75 7.1 7.0 6.9 6.8
7.0 21.0 21.3 20.5 20.4 6.5 7.2 5.8 6.2 77 76 74 75 7.1 6.9 6.8 6.7
8.0 21.0 21.2 20.4 20.4 6.3 6.8 5.7 6.2 77 76 74 75 7.0 6.9 6.8 6.7
9.0 20.9 21.2 20.4 6.2 6.6 5.7 77 76 74 7.0 6.9 6.8
10.0 20.8 21.1 20.4 5.9 6.0 5.7 76 75 74 7.0 6.8 6.8
11.0 20.8 20.6 20.3 5.7 5.8 5.6 75 74 74 6.9 6.8 6.8
12.0 20.8 20.3 20.3 5.6 5.7 5.5 75 74 74 6.9 6.8 6.7
13.0 20.8 20.3 20.3 5.5 5.7 5.5 75 74 74 6.9 6.9 6.7
14.0 20.8 20.3 20.3 5.5 5.7 5.5 75 74 74 6.9 6.9 6.7
15.0 20.7 20.3 20.3 5.5 5.7 5.5 75 74 74 6.9 6.9 6.7
16.0 20.7 20.3 5.5 5.6 75 74 6.8 6.9
17.0 20.7 20.3 5.5 5.4 75 74 6.8 6.9
18.0 20.7 5.5 75 6.8
Appendix A - 19
Table A-3 (continued)
November 17, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° C) (mg/L) (µ S/cm )
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 16.6 16.4 15.1 15.9 16.3 7.4 7.8 8.5 8.3 8.1 85 86 92 90 89 7.1 6.8 6.8 6.7 6.6
1.0 16.6 16.4 15.0 15.8 16.3 7.2 7.7 8.2 8.2 8.1 85 86 92 90 89 7.1 6.8 6.7 6.6 6.6
2.0 16.6 16.4 14.9 15.7 16.3 7.2 7.7 8.2 8.1 8.0 85 86 92 90 89 7.0 6.8 6.7 6.6 6.6
3.0 16.6 16.4 14.9 15.4 16.3 7.2 7.7 8.2 8.0 8.0 85 86 92 90 89 7.0 6.8 6.7 6.6 6.6
4.0 16.6 16.3 14.8 15.4 7.2 7.6 8.1 7.9 85 86 92 90 7.0 6.8 6.6 6.6
5.0 16.6 16.2 14.8 15.0 7.2 7.5 8.0 7.9 85 86 92 92 7.0 6.7 6.6 6.5
6.0 16.6 16.2 14.8 14.7 7.2 7.5 8.0 7.8 85 86 92 92 7.0 6.7 6.6 6.5
7.0 16.6 16.2 14.8 14.0 7.1 7.5 8.0 7.6 85 86 92 96 6.9 6.7 6.6 6.5
8.0 16.6 16.2 14.8 14.0 7.1 7.5 8.0 7.5 85 86 92 96 6.9 6.7 6.6 6.4
9.0 16.6 16.1 14.8 7.1 7.5 8.0 85 86 92 6.9 6.7 6.6
10.0 16.6 16.1 14.8 7.1 7.5 8.0 85 86 92 6.9 6.7 6.6
11.0 16.6 16.0 14.8 7.1 7.4 8.0 85 87 92 6.8 6.7 6.6
12.0 16.6 16.0 14.8 7.1 7.4 8.0 85 87 92 6.8 6.7 6.6
13.0 16.6 16.0 14.8 7.1 7.4 8.0 85 87 92 6.8 6.7 6.6
14.0 16.6 15.9 14.8 7.1 7.4 8.0 85 87 92 6.8 6.7 6.6
15.0 16.5 15.8 14.8 7.0 7.4 7.9 85 87 92 6.8 6.6 6.6
16.0 16.5 15.8 7.0 7.4 85 87 6.8 6.6
17.0 16.5 15.8 7.0 7.4 85 87 6.8 6.6
18.0 16.4 15.8 6.9 4.4 85 90 6.8 6.6
December 15, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) C C) (mg/L) (µS/cm)
B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2 B2 D2 F2 H2 K2
0.2 11.6 11.4 10.5 10.9 11.3 9.8 11.0 10.2 10.0 10.1 90 88 89 89 88 7.7 7.8 7.6 7.5 7.5
1.0 11.6 11.4 10.5 10.9 11.3 9.8 10.4 10.0 10.0 9.9 90 88 89 89 88 7.6 7.6 7.6 7.5 7.5
2.0 11.6 11.4 10.5 10.9 11.3 9.8 10.4 10.0 9.9 9.9 90 88 89 89 88 7.6 7.6 7.5 7.5 7.5
3.0 11.6 11.4 10.5 10.8 11.3 9.8 10.4 10.0 9.9 9.8 90 88 89 89 88 7.6 7.6 7.5 7.5 7.4
4.0 11.6 11.4 10.5 10.8 9.8 10.4 10.0 9.9 90 88 89 89 7.6 7.5 7.5 7.4
5.0 11.6 11.4 10.5 10.8 9.8 10.4 9.9 9.9 90 88 89 89 7.6 7.5 7.5 7.4
6.0 11.6 11.4 10.5 10.8 9.8 10.4 9.9 9.9 90 88 89 89 7.6 7.5 7.5 7.4
7.0 11.6 11.4 10.5 10.8 9.8 10.3 9.9 9.8 90 88 89 89 7.5 7.5 7.5 7.4
8.0 11.6 11.3 10.5 10.8 9.8 10.3 9.8 9.8 90 88 89 89 7.5 7.5 7.5 7.4
9.0 11.6 11.3 10.5 9.8 10.3 9.8 90 88 89 7.5 7.5 7.5
10.0 11.6 11.3 10.5 9.8 10.3 9.8 90 88 89 7.5 7.5 7.4
11.0 11.6 11.3 10.5 9.8 10.3 9.8 90 88 89 7.5 7.5 7.4
12.0 11.6 11.3 10.5 9.8 10.3 9.8 90 88 89 7.5 7.5 7.4
13.0 11.6 11.3 10.5 9.7 10.3 9.8 90 88 89 7.5 7.4 7.4
14.0 11.6 11.3 10.5 9.7 10.3 9.8 90 88 89 7.5 7.4 7.4
15.0 11.6 11.3 10.5 9.7 10.3 9.7 90 88 89 7.5 7.4 7.3
16.0 11.5 11.3 9.7 10.3 90 88 7.5 7.4
17.0 11.5 11.3 9.7 10.3 90 88 7.5 7.4
18.0 11.4 9.6 92 7.2
Appendix A - 20
Table A-3 (continued)
Secchi disk transparency depth (m)
Date TYB2 TYD2 TYF2 TYH2 TYK2
January 19 1.7 1.8 1.5 1.6 3.0'
February 23 1.2 0.8 0.5 0.5 3.0'
March 17 0.9 N,V 1.1 ND 3.0'
April6 1.3 ND 1.4 ND 3.0'
May 11 0.2 0.1 0.1 0.1 2.0'
June 22 1.6 1.5 1.5 1.4 1.7
July 13 1.5 1.4 1.5 1.5 3.0'
August 24 1.3 1.6 0.9 1.1 1.9
September 21 1.1 1.1 1.1 1.0 3.0'
October 19 1.2 1.1 0.9 1.0 3.0'
November 17 1.7 ND 1.9 ND 1.7
December 15 1.0 1.1 1.6 1.7 3.0'
Missing data due to either measurements were not obtained during sampling or because the Secchi disk was
observed on river or lake bottom during sampling. In such instances, the depth of the lake bottom is listed as a
reference to Secchi depth.
2 No data were collected at the station on the listed date.
Appendix A - 21
Table A-4 Water temperature, dissolved oxygen, specific conductance, pH, Secchi disk
transparency, and turbidity data collected from the Pee Dee River (Stations
TY1B and TY12B) below the Tillery Hydroelectric Plant during 2000.
Station TY1B
Dissolved Specific
Temperature oxygen conductance Secchi disk Turbidity
Date (BC) (mg/L) ((DS/cm) pH depth (m) (NTt)
01/24/00 7.4 10.2 100 7.6 ND' 10
02/01/00 6.0 11.7 87 6.6 ND 10
03/08/00 11.6 12.5 109 6.9 ND 7.1
04/06/00 14.6 9.9 85 7.0 ND 9.9
05/02/00 17.4 8.4 90 6.8 ND 11
06/12/00 22.4 7.5 102 7.3 ND 4.4
07/10/00 24.9 3.5 136 6.7 ND 3.8
08/08/00 28.1 8.6 167 7.4 ND 5.1
09/05/00 25.5 3.0 123 6.6 ND 4.3
10/04/00 23.2 6.7 149 7.3 ND 6.9
11115100 17.6 9.5 111 6.5 ND 3.1
12/05/00 12.5 10.8 140 7.2 ND 4.3
Station TY12B
Dissolved Specific
Temperature oxygen conductance Secchi disk Turbidity
Date (BC) (mg/L) (cDS/cm) pH depth (m) (NTt)
01/24/00 2.9 12.5 104 8.1 0.2 157
02/01/00 3.2 12.4 66 6.7 0.2 46
03/08/00 12.4 11.7 138 6.8 1.2 9.0
04/06/00 15.2 10.0 127 7.4 1.0 15
05/02/00 17.7 8.4 110 6.7 0.5 43
06/12/00 24.1 6.8 117 7.3 0.9 13
07/10/00 30.3 8.1 381 6.9 1.2 8.8
08/08/00 27.4 6.9 124 6.8 0.3 44
09/05/00 23.2 5.8 72 7.0 0.3 106
10/04/00 23.5 8.0 132 7.0 0.9 16
11115100 15.1 9.9 116 6.4 0.9 5.6
12/05/00 8.7 11.0 122 7.0 1.7 6.4
1 Secchi disk transparency depth was not determined because sampling was conducted by wading at this station
Appendix A - 22
Table A-5 Water temperature, dissolved oxygen, specific conductance, pH, Secchi disk
transparency, and turbidity data collected from the Pee Dee River (Stations
TY1B, TY12B, and RR) below the Tillery Development during 2001.
Specific
Dissolved conductance Secchi disk Turbidity
01/17/01 NS' NS NS NS NS NS
02/21/01 9.4 11.9 102 7.0 NV 4.0
03/27/01 10.8 10.6 95 6.7 ND 6.7
04/11/01 13.1 10.8 98 7.2 ND 4.6
05110101 16.4 7.4 103 7.4 ND 5.4
06/13/01 21.3 6.5 92 7.1 ND 2.6
07/18/01 24.7 4.6 121 8.0 ND 1.3
08/20/01 25.6 5.0 132 7.2 ND 1.7
09/18/01 24.1 5.5 127 6.1 ND 2.8
10/30/01 19.6 10.9 126 7.1 ND 3.0
11/28/01 16.1 9.1 122 7.9 ND 5.9
12/18/01 14.6 9.6 118 6.9 ND 3.8
Station TY12B
Specific
Temperature Dissolved conductance Secchi disk Turbidity
Date ($C) oxygen (mg/L) ((DS/cm) pH depth (m) (NTfl)
01/17/01 6.8 11.8 118 6.7 1.3 11
02/21/01 9.1 10.2 85 6.8 0.5 40
03/27/01 10.9 10.4 120 6.7 0.6 23
04/11/01 15.7 9.6 125 7.1 1.3 4.2
05110101 20.2 8.7 201 7.2 3 4.0
06/13/01 24.6 8.0 119 7.5 0.9 4.0
07/18/01 24.4 4.5 121 8.1 15 4.4
08/20/01 26.4 5.3 129 7.3 103
09/18/01 23.2 6.4 134 6.3 7.5
10/30/01 14.8 11.6 218 7.2 4.9
11/28/01 15.6 8.5 228 7.9 12
12/18/01 13.9 9.6 174 6.8 10 12
Appendix A - 23
Table A-5 (continued)
Station RR
Specific
Temperature Dissolved conductance Secchi disk Turbidity
Date ($C) oxygen (mg/L) (TS/cm) pH depth (m) (NTfl)
01/17/01 NS NS NS NS NS NS
02/21/01 10.5 10.7 149 6.9 ND 33
03/27/01 11.9 12.0 151 6.8 ND 22
04/11/01 22.3 8.1 225 7.1 ND 13
05110101 21.8 8.3 466 7.4 ND 12
06/13/01 27.6 7.7 452 8.2 ND 4.5
07/18/01 28.6 7.0 462 7.2 ND 12
08/20/01 26.3 6.6 383 7.2 ND 83
09/18/01 20.0 7.8 552 7.3 ND 12
10/30/01 12.9 13.0 627 7.5 ND 4.7
11/28/01 17.0 9.4 603 7.7 ND 17
12/18/01 13.6 10.8 316 7.1 ND 17
1 No data collected at these stations during January 2001.
2 Secchi disk transparency depth was not determined because sampling was conducted by wading.
3 Secchi disk transparency depth was not obtained or Secchi disk was on the river bottom before the transparency
depth was reached.
Appendix A - 24
Table A-6 Water temperature, dissolved oxygen, specific conductance, pH, and turbidity
data collected from the Pee Dee River (Stations TY1B, TY12B, and RR) below
the Tillery Development during 2002.
Specific
Temperature Dissolved conductance Turbidity
Date (BC) oxygen (mg/L) ((DS/cm) pH (NTt)
01/15/2002 9.7 12.4 80 7.7 2.7
02/04/2002 9.0 14.4 104 7.6 27
03/14/2002 10.6 11.0 99 7.2 8.1
04/11/2002 14.6 8.9 104 7.5 8.8
05/14/2002 19.7 7.0 112 7.3 3.8
06/06/2002 20.5 9.4 120 7.0 3.1
07/01/2002 22.9 5.4 120 7.8 1.4
08/27/2002 24.8 4.8 137 7.2 3.5
09/24/2002 24.4 5.7 116 7.5 3.0
10/29/2002 18.9 7.6 105 7.4 5.6
11/14/2002 16.7 8.8 105 7.4 4.7
12/18/2002 8.1 10.2 68 7.2 25
Station TY1B
Specific
Temperature Dissolved conductance Turbidity
Date (BC) oxygen (mg/L) ((DS/cm) pH (NTt)
01/15/2002 8.1 12.0 78 6.1 0.5
02/04/2002 9.5 13.8 102 8.1 1.7
03/14/2002 11.4 9.5 136 7.1 2.5
04/11/2002 16.0 8.2 118 7.3 28
05/14/2002 19.2 7.0 128 7.3 19
06/06/2002 25.4 8.1 181 6.8 12
07/01/2002 28.0 7.3 432 7.9 6.7
08/27/2002 26.8 6.4 137 7.7 9.7
09/24/2002 24.6 6.5 162 8.0 18
10/29/2002 18.2 7.2 113 8.2 23
11/14/2002 15.4 8.6 104 7.8 5.4
12/18/2002 6.6 10.3 55 7.2 40
Station TY1B
Specific
Temperature Dissolved conductance Turbidity
Date (BC) oxygen (mg/L) (TS/cm) pH (NTt)
01/15/2002 6.5 13.7 186 7.3 0.6
02/04/2002 9.1 14.2 186 7.9 9.3
03/14/2002 12.0 9.6 230 7.3 10
04/11/2002 18.8 8.6 263 7.7 14
05/14/2002 24.0 7.3 529 7.8 22
06/06/2002 29.1 7.2 468 7.3 8.9
07/01/2002 28.9 7.2 1,006 8.4 10
08/27/2002 27.0 6.7 419 7.7 9.0
09/24/2002 24.3 7.8 375 7.8 10
10/29/2002 16.3 8.9 257 7.1 11
11/14/2002 14.2 6.7 151 7.3 9.4
12/18/2002 6.8 12.2 106 7.2 22
Appendix A - 25
Table A-7 Water temperature, dissolved oxygen, specific conductance, pH, and turbidity
data collected from the Pee Dee River below the Tillery Development (Stations
TY1B, TY12B, and RR) during 20041.
Station TY1B (Non Generation Flow)
Specific
Temperature Dissolved conductance Turbidity
Date (BC) oxygen (mg/L) ((DS/cm) pH (NTfl)
01/15/2002 7.2 12.4 86 7.7 2.2
02/04/2002 5.9 12.2 95 7.7 11
03/14/2002 8.9 12.2 94 8.5 18
04/11/2002 10.7 9.1 102 9.0 7.9
05/14/2002 18.1 7.7 92 7.6 9.1
06/06/2002 22.2 7.4 99 7.4 2.7
07/01/2002 25.9 4.4 92 6.8 0.6
08/27/2002 26.3 5.0 98 7.0 1.3
09/24/2002 23.6 5.9 95 7.3 4.2
10/29/2002 20.4 5.8 75 6.6 14
11/14/2002 17.5 8.9 88 6.9 5.0
12/18/2002 13.3 11.1 89 7.6 7.1
Station TY1B (Generation Flow)
Specific
Temperature Dissolved conductance Turbidity
Date (BC) oxygen (mg/L) ((DS/cm) pH (NTfl)
01/15/2002 6.3 11.9 86 7.4 6.5
02/04/2002 6.2 12.2 95 8.0 18
03/14/2002 9.5 11.5 92 8.5 15
04/11/2002 13.0 9.5 95 7.9 11
05/14/2002 18.8 8.1 81 7.6 9.4
06/06/2002 23.6 5.2 97 7.2 4.7
07/01/2002 26.3 2.9 99 6.8 1.5
08/27/2002 26.5 4.0 99 7.0 3.0
09/24/2002 24.0 6.0 96 7.2 5.3
10/29/2002 20.9 6.4 78 7.4 24
11/14/2002 16.5 7.8 88 7.1 8.5
12/18/2002 11.5 10.5 90 7.6 8.9
Ctwt:nn RR _ P.Azv R:v.r
Specific
Temperature Dissolved conductance Turbidity
Date (BC) oxygen (mg/L) ($S/cm) pH (NTfl)
01/15/2002 6.4 13.8 257 9.1 3.2
02/04/2002 11.0 11.3 183 7.5 20
03/14/2002 14.4 10.1 196 7.7 17
04/11/2002 15.6 9.3 181 8.3 16
05/14/2002 25.6 7.9 248 7.7 17
06/06/2002 25.7 11.1 230 7.7 73
07/01/2002 28.1 6.8 491 7.5 21
08/27/2002 27.4 7.4 197 7.6 8.6
09/24/2002 19.0 8.3 146 7.5 28
10/29/2002 17.3 9.1 181 7.5 9.4
11/14/2002 9.9 11.0 214 7.2 26
12/18/2002 10.5 10.7 140 7.7 55
Appendix A - 26
Table A-7 (continued)
Station TY12B (Non Generation Flow )
Specific
Temperature Dissolved conductance Turbidity
Date (BC) oxygen (mg/L) ((DS/cm) pH (NTfl)
01/15/2002 7.2 13.8 125 8.0 27
02/04/2002 7.0 11.0 113 7.5 30
03/14/2002 10.0 10.7 115 8.0 18
04/11/2002 13.2 8.4 146 8.0 17
05/14/2002 19.4 7.9 106 7.4 16
06/06/2002 25.8 5.4 124 7.9 21
07/01/2002 27.1 4.9 112 7.1 14
08/27/2002 26.3 5.2 111 7.3 21
09/24/2002 20.8 6.5 103 7.3 17
10/29/2002 20.4 6.7 88 7.3 9.1
11/14/2002 12.9 8.9 131 7.2 9.4
12/18/2002 8.5 9.7 115 7.7 13
Station TY12B (Generation Flow)
Specific
Temperature Dissolved conductance Turbidity
Date (BC) oxygen (mg/L) ((DS/cm) pH (NTfl)
01/15/2002 6.4 12.7 97 7.7 7.2
02/04/2002 7.9 10.9 140 7.8 30
03/14/2002 10.1 11.5 97 7.7 17
04/11/2002 13.2 9.8 97 8.0 9.0
05/14/2002 20.9 8.1 96 7.8 15
06/06/2002 25.8 10.1 125 7.0 29
07/01/2002 27.9 6.1 103 7.2 26
08/27/2002 29.7 8.2 162 7.7 16
09/24/2002 21.3 7.8 120 7.4 45
10/29/2002 21.2 6.9 79 7.0 15
11/14/2002 14.8 8.3 99 6.4 10
12/18/2002 7.6 11.8 119 7.7 12
Appendix A - 27
APPENDIX B
RAW DATA LISTING FOR WATER QUALITY PARAMETERS
COLLECTED IN BLEWETT FALLS LAKE AND THE PEE DEE RIVER
DURING 1999, 2001, AND 2004
Table B-1 Water temperature, dissolved oxygen, specific conductance, pH, Secchi disk
transparency, and turbidity data collected from Blewett Falls Lake (Stations
BFB2, BFF2, and BFH2) and the Pee Dee River (Station TY12B) during
1999.
January 19, 1999
Depth Temperature Dissolved oxygen Specific conductance pH
B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B
0.2 8.9 8.4 8.0 9.2 9.2 10.9 10.3 10.7 87 96 93 142 7.0 6.9 7.0 7.0
1.0 8.9 8.4 8.0 9.2 10.7 10.3 87 97 94 7.0 6.9 7.0
2.0 8.9 8.5 8.0 9.2 10.6 10.2 87 99 94 7.0 7.0 7.0
3.0 8.9 8.4 9.2 10.6 87 100 7.0 7.0
4.0 8.9 8.4 9.2 10.6 87 102 7.0 7.0
5.0 8.9 8.4 9.2 10.5 87 102 7.0 7.0
6.0 8.9 8.4 9.2 10.3 87 102 7.0 7.0
7.0 8.9 8.4 9.2 10.2 87 102 7.0 7.0
8.0 8.9 9.2 87 7.0
February 1, 1999
Depth Temperature Dissolved oxygen Specific conductance pH
B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B
0.2 8.6 8.5 8.4 8.8 11.2 11.3 11.9 11.9 79 84 82 82 6.5 6.7 6.7 6.9
1.0 8.6 8.5 11.2 11.4 79 84 6.6 6.7
2.0 8.6 8.5 11.2 11.4 79 84 6.6 6.7
3.0 8.6 8.5 11.2 11.4 79 84 6.6 6.7
4.0 8.6 8.5 11.2 11.4 80 84 6.7 6.7
5.0 8.5 8.5 11.2 11.4 80 85 6.7 6.7
6.0 8.6 10.3 83 6.6
March 5, 1999
Depth Temperature Dissolved oxygen Specific conductance pH
(m) C C) (mg/L) (µS/cm)
B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B
0.2 10.0 8.9 9.5 8.6 11.7 11.6 12.3 10.6 92 76 111 106 6.9 7.0 7.1 6.8
1.0 10.0 8.9 9.5 11.5 11.6 12.1 93 76 111 6.9 7.0 7.1
2.0 10.0 8.9 9.5 11.5 11.5 12.1 93 76 111 6.9 7.0 7.1
3.0 10.0 8.9 11.4 11.4 93 76 6.9 7.0
4.0 10.0 8.8 11.3 11.3 93 76 6.9 7.0
5.0 10.0 8.8 11.2 11.3 93 76 6.9 7.0
6.0 10.0 8.8 11.2 11.3 93 76 6.9 7.0
7.0 9.9 8.9 11.1 10.7 93 76 6.9 7.0
8.0 9.9 . 10.8 93 6.9
Appendix B - 1
Table B-1 (continued)
April 15-16, 1999
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 18.6 17.4 16.4 14.5 9.2 9.8 10.2 9.7 105 111 97
1.0 18.6 17.4 16.4 9.2 9.8 10.2 104 111 97
2.0 18.5 17.3 16.4 8.7 9.5 10.2 104 110 97
3.0 18.4 17.1 8.4 9.5 104 110
4.0 18.4 17.0 8.3 9.4 104 109
5.0 17.9 16.8 8.1 9.3 104 108
6.0 17.7 16.8 7.9 5.5 104 112
7.0 17.7 7.3 104
8.0 17.5 6.8 104
95 6.2 6.4 6.6
6.3 6.4 6.6
6.3 6.4 6.6
6.3 6.4
6.3 6.4
6.3 6.4
6.3 6.4
6.3
6.3
6.1
May 14, 1999
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 22.8 21.3 19.2 18.9 10.6 9.3
1.0 20.7 21.2 19.2 9.1 9.1
2.0 19.9 20.5 19.2 8.3 8.7
3.0 19.5 20.2 8.3 8.7
4.0 19.2 20.0 8.2 8.5
5.0 18.8 19.4 7.5 8.4
6.0 18.8 19.1 7.4 8.2
7.0 18.7 18.7 7.3 6.0
8.0 18.5 7.0
9.6 8.0 124 115 105 149 6.8 6.3 6.2 6.3
9.4 112 114 105 7.0 6.2 6.2
9.4 106 111 105 6.5 6.4 6.2
104 111 6.5 6.2
103 111 6.4 6.2
99 106 6.4 6.2
99 104 6.4 6.2
98 109 6.4 6.2
98 6.4
June 11, 1999
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 27.6 26.6 24.1 22.0 10.2 8.8
1.0 27.6 26.5 24.1 10.2 8.5
2.0 27.6 26.1 24.1 10.3 7.8
3.0 26.2 25.5 8.3 6.5
4.0 25.2 25.1 5.8 5.5
5.0 23.7 24.6 4.0 4.9
6.0 23.5 24.1 3.5 3.2
7.0 23.1 22.6 2.3 0.5
8.0 22.8 1.8 .
6.8 6.8 152 133 140 111
6.6 151 133 140
6.6 151 127 141
145 126
134 132
130 124
129 129
129 138
129
Appendix B - 2
8.1 7.4 7.0 6.9
8.1 7.4 6.9
8.3 7.4 6.9
8.2 7.3
7.9 7.2
7.7 7.1
7.6 6.9
7.4 6.8
7.3
Table B-1 (continued)
July 14, 1999
Depth Temperature Dissolved oxygen Specific conductance pit
0.2 25.9 23.9 22.8 22.8 6.2 6.1 6.7
1.0 25.9 23.9 22.8 5.7 6.1 6.5
2.0 26.0 23.2 22.8 5.3 5.9 6.4
3.0 26.0 22.8 5.3 5.8
4.0 26.0 22.7 5.3 5.7
5.0 26.0 22.7 5.3 5.7
6.0 26.0 22.7 5.2 5.7
7.0 25.9 22.7 5.1 5.2
8.0 25.6 4.7
9.0 25.5 4.7
7.3 144 161 112
144 161 112
144 150 112
144 124
144 118
144 113
144 112
144 113
146
147
130 6.9 6.8 6.8
6.9 6.8 6.8
6.9 6.8 6.8
6.9 6.7
6.9 6.7
6.9 6.7
6.9 6.7
6.9 6.7
6.9
6.8
6.8
August 2, 1999
Depth Temperature Dissolved oxygen Specific conductance pit
0.2 31.6 30.5 31.9 27.3 9.7 9.9 9.1
1.0 31.6 30.5 31.9 9.7 9.8 9.0
2.0 31.5 29.1 31.9 9.6 6.6 8.9
3.0 30.9 28.3 9.2 4.2
4.0 30.3 28.0 8.4 3.6
5.0 30.0 27.7 8.0 2.8
6.0 28.7 27.5 3.4 2.1
7.0 28.2 27.3 2.5 1.4
8.0 28.0 1.8
9.0 27.7 1.1
4.6 161 152 209
161 152 210
161 144 211
160 156
158 155
157 151
148 149
148 150
148
148
123 8.1 7.7 7.9
8.1 7.7 7.9
8.1 7.7 7.9
8.1 7.5
8.0 7.4
7.8 7.3
7.7 7.3
7.4 7.1
7.3
7.2
7.1
September 9, 1999
Depth Temperature Dissolved oxygen Specific conductance pit
0.2 26.5 27.6 27.1 25.9 8.9 6.3 5.7
1.0 26.3 27.6 27.1 8.2 6.2 5.7
2.0 25.9 27.5 27.1 7.1 6.0 5.7
3.0 25.5 27.4 5.2 5.6
4.0 25.2 27.1 4.5 5.6
5.0 25.0 26.2 3.9 4.4
6.0 24.9 25.6 3.5 3.7
7.0 24.9 25.2 3.0 0.2
8.0 24.9 2.9
9.0 24.8 1.4
5.3 157 254 218
155 257 218
148 252 218
142 221
141 190
143 147
147 135
145 189
138
138
126 7.5 7.3 7.1
7.5 7.2 7.1
7.5 7.2 7.1
7.4 7.2
7.3 7.2
7.2 7.2
7.2 7.1
7.1 6.8
7.1
7.0
7.5
Appendix B - 3
Table B-1 (continued)
October 21, 1999
Depth Temperature Dissolved oxygen Specific conductance pit
0.2 19.2 19.4 19.3 19.8 6.8 7.1 7.5
1.0 19.2 19.4 19.3 6.7 6.8 7.3
2.0 19.2 19.4 19.3 6.7 6.8 7.3
3.0 19.1 19.4 6.8 6.8
4.0 19.1 19.4 7.0 6.7
5.0 19.0 19.2 6.9 6.6
6.0 18.9 19.2 6.9 6.1
7.0 18.8 6.9
8.0 18.8 6.7
7.3 106 105 100
106 104 99
104 104 100
105 104
105 103
105 101
114 103
118
119
116 7.2 6.9 6.7
7.2 7.0 6.9
7.2 7.0 6.9
7.2 7.0
7.2 6.9
7.1 7.0
7.1 6.9
7.0
7.0
7.1
November 10, 1999
Depth Temperature Dissolved oxygen Specific conductance pit
0.2 15.7 16.6 16.8 16.3 8.4 9.7 8.6
1.0 15.7 16.1 16.8 8.4 9.7 8.6
2.0 15.7 16.0 16.8 8.1 9.8 8.5
3.0 15.6 16.0 7.8 9.7
4.0 15.6 16.0 8.0 9.7
5.0 15.6 16.0 7.6 9.7
6.0 15.6 15.4 7.5 9.3
7.0 15.6 15.3 7.4 9.3
8.0 15.6 7.2
9.0 15.6 6.3
8.9 121 142 116
121 152 116
121 156 115
121 159
121 161
121 162
121 181
121 195
121
126
165 6.7 7.0 7.2
6.7 7.0 7.1
6.6 7.0 7.0
6.6 6.9
6.6 6.9
6.6 6.9
6.6 6.9
6.6 6.9
6.6
6.6
7.1
December 2, 1999
Depth Temperature Dissolved oxygen Specific conductance pit
0.2 12.2 12.5 11.9 9.9 7.5 8.6 8.9
1.0 12.2 12.5 11.9 7.4 8.4 8.9
2.0 12.3 12.5 11.9 7.1 8.4 8.9
3.0 12.3 12.5 7.2 8.4
4.0 12.3 12.4 7.2 8.4
5.0 12.3 12.4 7.2 8.4
6.0 12.3 12.2 7.2 8.2
7.0 12.3 12.2 7.2 8.0
8.0 12.3 7.3
9.0 12.3 7.3
10.6 148 96 90
148 96 90
148 96 90
148 96
148 98
148 98
148 101
148 105
148
148
113 6.7 7.1 7.0
6.6 7.0 7.0
6.7 7.0 6.9
6.8 7.0
6.9 7.0
6.9 7.0
6.9 7.0
6.9 7.0
6.9
6.9
6.8
Appendix B - 4
Table B-1 (continued)
Secchi disk transparency depth (m)
Date BFB2 BFF2 BFM TY12B
January 19, 1999 0.7 0.7 0.4 1
February 1, 1999 0.7 0.7 -- --
March 5, 1999 0.5 0.7 0.9 1.2
April 15-16, 1999 0.6 0.8 1.2 1.7
May 14, 1999 1.1 0.6 1.2 1.1
June 11, 1999 1.3 0.8 1.3 1.2
July 14, 1999 0.6 0.7 1.4 1.4
August 2, 1999 1.3 0.8 1.2 1.3
September 9, 1999 1.0 0.8 1.3 1.8
October 21, 1999 0.6 0.6 1.2 1.1
November 10, 1999 1.2 1.2 1.8 2.0
December 2, 1999 0.6 0.8 1.6 1.4
Missing data due to either measurements were not obtained during sampling or because the Secchi disk was
observed on river or lake bottom during sampling.
Appendix B - 5
Table B-2 Water temperature, dissolved oxygen, specific conductance, pH, and Secchi disk
transparency data collected from Blewett Falls Lake (Stations BFB2, BFF2,
BFH2) and the Pee Dee River (Station TY12B) during 2001.
January 17, 2001
Depth Temperature Dissolved oxygen Specific conductance pH
(m) C C) (mg/L) (µS/cm)
B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B
0.2 6.3 7.2 8.0 6.8 12.6 12.7 14.2 11.8 94 105 235 118 6.6 7.1 8.1 6.7
1.0 6.2 7.1 8.0 12.6 12.7 14.2 93 104 235 6.6 7.0 8.2
2.0 6.2 7.1 8.0 12.6 12.7 14.2 93 104 234 6.6 7.0 8.2
3.0 6.2 7.1 12.6 12.7 93 104 6.6 7.0
4.0 6.2 7.1 12.6 12.7 93 104 6.6 7.0
5.0 6.2 7.1 12.6 12.7 93 104 6.6 7.0
6.0 6.2 7.1 12.6 12.7 93 104 6.6 7.0
7.0 6.2 6.7 12.6 12.8 93 104 6.6 7.0
8.0 6.1 12.6 93 6.6
9.0 6.0 12.3 93 6.6
February 21, 2001
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° C ) (m g/L) (µ S/cm)
B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B B2 F2 H2 TY12B
0.2 11.1 9.8 9.1 9.1 10.2 11.9 10.7 10.2 136 101 107 85 6.6 6.8 6.9 6.8
1.0 11.1 9.8 9.1 9.S 11.7 10.7 135 101 107 6.6 6.8 6.9
2.0 11.1 9.8 9.1 9.S 11.6 10.7 135 101 107 6.6 6.8 6.9
3.0 11.1 9.8 9.S 11.6 135 101 6.6 6.8
4.0 11.1 9.8 9.f 11.6 135 101 6.6 6.8
5.0 11.1 9.6 9.f 11.5 135 103 6.6 6.8
6.0 11.0 9.6 9.f 11.5 135 103 6.6 6.8
7.0 10.9 9.4 9.f 11.3 134 104 6.7 6.8
8.0 10.7 9.; 132 6.7
9.0 10.3 9.1 130 6.7
March 27, 2001
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 11.9 12.1 11.0 10.9 9.7 10.5 11.6 10.4 93 112 98 120 6.6 6.5 6.9
1.0 11.9 12.1 11.0 9.7 10.5 11.6 93 112 98 6.6 6.5 6.9
2.0 11.9 12.1 11.0 9.7 10.3 11.6 93 112 98 6.6 6.5 6.9
3.0 11.9 12.1 9.7 10.3 93 112 6.6 6.5
4.0 11.9 12.1 9.7 10.2 93 112 6.6 6.5
5.0 11.9 12.1 9.6 10.2 93 112 6.6 6.5
6.0 11.9 12.1 9.6 10.2 93 112 6.6 6.5
7.0 11.8 12.1 9.5 9.9 92 110 6.6 6.6
8.0 11.8 9.4 92 6.6
9.0 11.7 9.2 92 6.6
6.7
Appendix B - 6
Table B-2 (continued)
April 11, 2001
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 17.6 16.7 13.8 15.7
1.0 17.5 16.2 13.8
2.0 16.7 15.7 13.8
3.0 16.5 15.3
4.0 16.1 15.1
5.0 16.0 15.0
6.0 15.9 14.9
7.0 15.8 14.9
8.0 15.7
9.0 15.5
10.2 10.2 10.2 9.6 124 125 100 125 6.9 7.0 7.0
10.0 10.2 10.2 123 118 100 6.9 7.0 7.0
9.6 10.4 10.2 118 113 100 6.9 7.0 7.0
9.6 10.6 114 109 6.9 7.0
9.5 10.6 111 108 6.9 7.0
9.4 10.7 111 107 6.9 7.0
9.4 10.7 110 106 6.9 7.0
9.4 10.7 107 106 6.9 7.0
9.2 107 6.9
8.7 108 6.9
7.1
May 10, 2001
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 22.4 22.4 20.5 20.2 12.3 12.4 10.0 8.7
1.0 22.4 22.3 20.3 12.5 12.3 9.6
2.0 21.7 21.4 19.9 10.3 9.7 8.7
3.0 21.0 20.5 8.0 7.0
4.0 20.5 19.9 7.6 5.3
5.0 20.1 19.3 6.8 4.2
6.0 19.8 19.1 5.6 3.5
7.0 19.4 18.6 5.4 0.3
8.0 19.3 4.7
9.0 18.9 3.0
59 146 117 201 7.2 7.0 7.5
59 146 118 7.5 6.9 7.6
52 143 118 7.6 6.9 7.5
47 158 7.6 7.0
41 138 7.5 7.0
37 127 7.4 7.1
35 128 7.4 7.1
35 138 7.3 7.1
36 7.2
37 7.1
7.2
June 13, 2001
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 25.6 27.2 26.0 24.6 8.7 11.2 7.7
1.0 25.6 27.0 26.0 8.9 10.8 7.6
2.0 25.0 25.8 25.9 6.2 8.4 7.4
3.0 24.6 25.1 4.3 6.6
4.0 24.2 24.5 3.9 5.1
5.0 23.6 23.9 3.2 2.4
6.0 23.4 23.3 2.6 0.5
7.0 23.1 22.8 2.0 0.3
8.0 22.9 1.6
9.0 22.5 1.0
8.0 124 124 143 119 8.8 9.3 7.6
124 122 143 8.8 9.1 7.6
117 114 142 7.4 7.7 7.5
116 111 7.1 7.3
113 110 7.0 7.2
111 113 6.9 7.0
111 114 6.9 6.9
111 122 6.8 6.9
112 6.8
117 6.9
7.5
Appendix B - 7
Table B-2 (continued)
July 18, 2001
Depth Temperature Dissolved oxygen Specific conductance pit
0.2 27.1 27.5 26.4 24.4 10.7 10.5 6.6 4.5 142 146 165 121 8.1 8.0 7.8
1.0 27.1 27.5 26.4 10.7 10.7 6.9 141 144 165 8.1 8.1 7.7
2.0 26.9 27.3 26.4 9.2 10.2 7.1 140 147 166 8.1 8.1 7.7
3.0 26.8 27.2 8.3 9.1 138 148 8.0 8.0
4.0 26.6 26.8 6.3 7.6 138 149 7.9 7.9
5.0 26.3 26.4 3.8 6.4 137 145 7.8 7.8
6.0 26.1 26.2 3.6 5.5 136 144 7.6 7.8
7.0 26.1 25.4 3.4 0.8 136 144 7.5 7.6
8.0 25.9 1.8 138 7.5
9.0 25.8 1.6 139 7.4
8.1
August 20, 2001
Depth Temperature Dissolved oxygen Specific conductance pit
0.2 28.5 28.4 28.2 26.4 6.3 8.5 6.0
1.0 28.5 28.1 27.5 6.2 8.1 5.8
2.0 28.5 28.1 27.2 5.7 7.5 5.5
3.0 28.4 28.0 5.3 7.1
4.0 28.4 27.8 5.1 6.5
5.0 28.2 27.3 2.4 4.3
6.0 28.1 27.1 1.8 3.7
7.0 28.0 27.1 1.7 3.4
8.0 28.0 1.5
9.0 27.9 1.2
5.3 185 148 148 129 7.4 7.4 7.4
184 152 148 7.5 7.5 7.4
184 152 150 7.5 7.6 7.4
183 151 7.5 7.6
181 151 7.5 7.6
169 135 7.4 7.5
168 131 7.3 7.4
166 131 7.3 7.3
164 7.3
162 7.3
7.3
September 18, 2001
Depth Temperature Dissolved oxygen Specific conductance pit
0.2 24.0 23.6 23.9 23.2 7.3 8.5 8.9
1.0 24.0 23.0 23.1 7.3 8.3 8.4
2.0 24.0 22.8 22.8 7.3 7.6 8.1
3.0 24.0 22.8 7.3 7.5
4.0 24.0 22.7 7.3 7.4
5.0 24.0 22.7 7.3 7.2
6.0 24.0 22.6 7.2 6.3
7.0 24.0 22.6 7.1 6.2
8.0 23.9 6.0
9.0 23.6 5.4
6.4 152 132 128 134 6.4 6.5 6.4
152 131 126 6.4 6.5 6.3
152 130 126 6.3 6.4 6.3
152 130 6.3 6.4
152 131 6.2 6.3
152 131 6.2 6.2
152 130 6.1 6.1
152 131 6.1 6.1
148 5.9
144 6.0
6.3
Appendix B - 8
Table B-2 (continued)
October 30, 2001
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 16.2 14.0 13.3 14.8 9.2 11.6 11.8 11.6 201 160 172 218 7.1 7.2 7.4 7.2
1.0 16.2 14.0 9.2 11.9 201 159 7.0 7.3
2.0 16.2 14.0 9.4 11.5 201 155 7.1 7.3
3.0 16.2 13.9 9.3 10.7 200 150 7.2 7.3
4.0 16.2 13.6 9.4 10.0 200 137 7.2 7.3
5.0 16.2 13.4 9.4 9.6 200 137 7.2 7.3
6.0 16.2 13.4 9.4 9.5 201 137 7.2 7.3
7.0 16.2 9.4 201 7.2
November 28, 2001
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 14.6 16.0 15.9 15.6 11.2 10.2 8.4
1.0 14.6 15.9 11.2 10.2
2.0 13.9 15.5 9.1 9.8
3.0 13.7 14.5 8.5 8.6
4.0 13.7 13.3 8.5 7.8
5.0 13.3 12.0 7.8 6.4
6.0 13.0 11.9 6.6 5.3
7.0 12.9 5.9
8.0 12.9 3.8
8.5 197 204 264 228 7.4 7.7 7.6
197 204 7.4 7.7
196 198 7.4 7.7
195 200 7.4 7.6
195 186 7.4 7.6
194 177 7.4 7.5
194 178 7.3 7.4
196 7.3
199 7.2
7.9
December 18, 2001
Depth Temperature Dissolved oxygen Specific conductance pH
0.2 13.7 14.0 14.5 13.9 10.1 9.0 10.1 9.6 150 159 122 174 6.0 6.7 6.6
1.0 13.7 14.0 14.5 10.0 9.1 10.1 150 160 122 6.1 6.7 6.6
2.0 13.7 14.0 14.5 10.0 9.2 10.2 150 159 122 6.1 6.7 6.6
3.0 13.7 14.0 10.0 9.3 149 159 6.2 6.7
4.0 13.7 13.9 10.0 9.4 149 152 6.2 6.7
5.0 13.7 13.9 10.0 9.4 149 151 6.2 6.7
6.0 13.7 10.0 149 6.2
7.0 13.7 9.9 150 6.3
8.0 13.7 9.9 150 6.3
9.0 13.7 9.8 150 6.3
6.8
Appendix B - 9
Table B-2 (continued)
Secchi disk
Date BFB2 BFF2 BFFU TY12B
January 17, 2001 1.7 1.2 1.3 1.3
February 21, 2001 0.6 0.5 0.5 0.5
March 27, 2001 0.3 0.4 1.2 0.6
April 11, 2001 0.7 0.8 1.3 1.3
May 10, 2001 0.9 0.9 0.9 1
June 13, 2001 1.0 0.9 0.9 0.9
July 18, 2001 1.1 0.8 1.1 1.5
August 20, 2001 1.1 0.9 0.9 --
September 18, 2001 0.8 0.9 1.0
October 30, 2001 0.7 0.6 --
November 28, 2001 1.1 0.9 -- --
December 18, 2001 0.6 0.5 0.8 1.0
Missing data due to either measurements were not obtained during sampling or because the Secchi disk was
observed on river or lake bottom during sampling.
Appendix B - 10
Table B-3 Water temperature, dissolved oxygen, specific conductance, and pH data
collected from Blewett Falls L ake (S tations BFB2, BF D2, BFF2, and BFH2)
during 20041.
January 20, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° Q (mg/L) ( µS/cm)
B2 F2 H2 B2 F2 H2 B2 F2 H2 B2 F2 H2
0.2 6.9 6.2 6.5 12.4 12.7 13.2 94 98 86 7.8 7.8 8.1
1.0 6.9 6.2 6.5 12.4 12.6 13.3 94 98 86 7.6 7.8 8.1
2.0 6.8 6.1 6.5 12.4 12.6 13.4 94 98 86 7.6 7.8 8.2
3.0 6.8 6.1 12.4 12.6 94 98 7.5 7.8
4.0 6.7 6.1 12.4 12.6 94 98 7.5 7.7
5.0 6.6 6.0 12.4 12.6 94 98 7.5 7.7
6.0 6.5 6.0 12.4 12.6 94 98 7.5 7.7
7.0 6.4 6.0 12.3 12.6 93 98 7.5 7.7
8.0 6.4 12.2 92 7.5
February 22, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° Q (mg/L) ( µS/cm)
B2 F2 H2 B2 F2 H2 B2 F2 H2 B2 F2 H2
0.2 8.0 8.4 8.3 12.9 12.4 13.0 99 94 119 7.6 7.7 7.6
1.0 7.8 6.8 8.3 12.8 12.6 13.0 100 94 119 7.6 7.6 7.6
2.0 7.7 6.6 8.3 12.8 12.6 12.9 98 94 118 7.6 7.6 7.6
3.0 7.6 6.5 12.7 12.5 102 93 7.6 7.6
4.0 7.6 6.5 12.6 12.5 99 96 7.5 7.6
5.0 7.5 6.5 12.6 12.5 99 96 7.5 7.5
6.0 7.5 6.5 12.5 12.4 101 96 7.5 7.5
7.0 7.5 6.5 12.5 12.4 101 97 7.5 7.5
8.0 7.5 12.4 105 7.5
March 15, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° Q (mg/L) (µS/cm)
0.2 11.7 12.4 11.6 13.6 12.2 12.6 98 107 115 8.3 7.9 8.0
1.0 11.5 12.0 11.6 13.5 12.4 12.6 98 108 115 8.3 7.9 8.0
2.0 11.3 11.6 11.6 13.3 12.1 12.6 97 109 114 8.2 7.8 7.9
3.0 10.9 11.6 13.0 11.9 97 108 8.2 7.8
4.0 10.6 11.5 12.6 11.9 95 112 8.1 7.8
5.0 10.4 11.5 12.3 11.9 97 108 8.0 7.8
6.0 10.3 11.5 12.0 11.9 97 110 8.0 7.8
7.0 10.2 11.5 12.0 11.9 98 112 7.9 7.8
8.0 10.1 11.8 94 7.9
Appendix B - 11
Table B-3 (continued)
Ap ril 4, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° Q (mg/L) (µS/cm)
B2 F2 H2 B2 F2 H2 B2 F2 H2 B2 F2 H2
0.2 12.8 13.5 14.4 9.2 9.8 10.1 102 107 150 7.6 8.0 8.3
1.0 12.8 13.5 9.2 9.8 101 107 7.6 8.0
2.0 12.8 13.5 9.2 9.8 102 108 7.6 7.9
3.0 12.8 13.4 9.2 9.8 101 108 7.6 7.9
4.0 12.8 13.4 9.2 9.6 101 111 7.6 7.8
5.0 12.8 12.8 9.2 8.4 102 123 7.6 7.5
6.0 12.8 12.7 9.2 8.0 103 127 7.6 7.6
7.0 12.8 12.7 9.2 7.6 101 131 7.6 7.6
8.0 12.8 9.2 101 7.6
Ma y 10, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° Q (mg/L) (µS/cm)
B2 F2 H2 B2 F2 H2 B2 F2 H2 B2 F2 H2
0.2 25.2 25.6 22.2 14.1 9.6 11.9 105 117 94 9.6 7.9 8.8
1.0 24.7 24.1 22.2 14.0 9.8 11.9 104 114 94 9.5 7.8 8.9
2.0 23.1 22.8 12.6 9.7 102 114 8.7 7.7
3.0 22.9 22.2 12.0 9.5 101 112 8.6 7.7
4.0 21.9 21.6 10.7 9.0 103 111 8.2 7.6
5.0 21.4 21.5 9.4 8.5 102 108 8.0 7.5
6.0 20.7 8.6 99 7.9
7.0 20.0 7.1 100 7.5
June 21, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) C Q (mg/L) (µS/cm)
B2 F2 H2 B2 F2 112 B2 F2 H2 B2 F2 112
0.2 27.8 27.0 26.1 10.5 8.9 7.0 114 108 97 9.2 7.9 7.5
1.0 27.8 26.6 26.1 10.4 8.2 6.9 114 107 96 9.2 7.8 7.3
2.0 27.6 26.0 8.9 6.9 113 103 8.7 7.4
3.0 27.1 25.7 7.0 4.9 114 99 8.2 7.0
4.0 26.6 25.5 5.0 4.4 108 99 7.5 7.0
5.0 26.3 25.4 4.3 3.6 108 99 7.3 6.7
6.0 25.9 25.1 3.4 2.6 108 101 6.9 6.7
7.0 25.7 24.9 3.0 1.5 106 104 6.9 6.6
Appendix B - 12
Table B-3 (continued)
July 12,2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° C) (mg/L) (µS/cm)
B2 F2 H2 B2 F2 H2 B2 F2 H2 B2 F2 H2
0.2 30.9 30.9 29.4 11.2 11.4 11.9 107 107 97 9.0 9.0 8.7
1.0 30.2 30.7 29.4 11.5 11.6 11.9 107 107 97 9.0 9.0 8.7
2.0 29.6 30.2 10.8 12.5 106 108 8.9 9.1
3.0 29.3 28.9 8.0 10.0 104 108 8.2 8.4
4.0 28.4 28.6 4.8 7.7 103 106 7.6 8.0
5.0 28.1 28.0 3.8 4.1 104 107 7.4 7.6
6.0 27.9 27.7 2.9 2.2 105 108 7.2 7.2
7.0 27.8 2.6 105 7.1
8.0 27.6 2.0 107 6.9
August 23, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° C) (mg/L) (µS/cm)
0.2 29.8 29.9 30.2 12.4 11.8 11.1 103 100 97 9.3 9.1 9.0
1.0 28.7 27.5 12.6 9.2 102 100 9.3 8.4
2.0 28.1 27.1 10.4 7.1 100 100 9.0 7.9
3.0 27.9 27.0 8.0 5.7 99 101 8.4 7.6
4.0 27.6 26.8 5.9 4.8 100 102 7.8 7.4
5.0 27.2 26.8 4.3 3.1 99 105 7.5 7.2
6.0 27.0 26.6 3.1 1.9 99 109 7.1 7.1
7.0 26.9 26.5 2.9 0.7 100 115 7.0 7.0
8.0 26.7 2.2 101 6.9
September 24, 2004
Depth Temperature Dissolved oxygen Specific conductance pH
(m) (° C) (mg/L) (µ S/cm)
B2 F2 H2 B2 F2 H2 B2 F2 H2 B2 F2 H2
0.2 23.7 23.8 23.8 7.7 6.8 8.2 101 92 90 7.6 7.4 7.6
1.0 23.7 23.8 23.8 7.7 6.7 8.1 101 92 90 7.6 7.4 7.6
2.0 23.7 23.7 7.6 6.6 101 92 7.5 7.4
3.0 23.7 23.7 7.6 6.6 101 92 7.5 7.3
4.0 23.7 23.5 7.5 6.5 101 93 7.5 7.3
5.0 23.7 23.5 7.4 6.4 101 94 7.5 7.3
6.0 23.7 23.5 7.3 6.3 101 94 7.4 7.3
7.0 23.1 23.5 6.0 6.3 104 95 7.3 7.2
Appendix B - 13
Table B-3 (continued)
October 18, 2004
Depth Temperature Di ssolved oxygen Specific conductance pH
(m) to C) (mg/L) (µS/cm)
B2 F2 112 B2 F2 112 B2 F2 112 B2 F2 H2
0.2 20.4 20.9 20.5 8.0 7.8 7.6 85 83 78 7.5 7.4 7.2
1.0 20.1 20.7 20.4 8.0 7.7 7.5 87 83 78 7.4 7.4 7.2
2.0 19.8 20.4 7.9 7.5 88 82 7.4 7.3
3.0 19.7 20.3 7.7 7.5 89 82 7.4 7.3
4.0 19.6 20.2 7.3 7.5 90 82 7.3 7.3
5.0 19.5 20.2 6.7 7.5 91 82 7.3 7.2
6.0 19.5 20.1 6.5 7.5 92 84 7.2 7.2
7.0 19.3 20.1 6.2 7.3 97 96 7.2 7.1
8.0 19.3 5.9 103 7.1
November 18 and 30,2004 2
Depth Te mperature Dissolved oxygen Specific conductance pH
(m) to C) (mg/L) (µS/cm)
0.2 14.6 14.0 15.6 15.7 9.5 10.6 9.4 8.5 93 98 93 84 7.1 7.8 7.0 6.9
1.0 14.6 13.5 15.4 15.7 9.4 10.0 9.3 8.4 93 101 93 84 7.0 7.8 7.0 6.8
2.0 14.3 13.2 15.3 15.7 9.2 9.8 9.2 8.4 100 105 94 84 6.9 7.8 6.9 6.7
3.0 14.2 13.2 15.2 9.2 9.7 9.0 100 106 94 6.8 7.7 6.8
4.0 14.1 13.2 14.8 9.0 9.7 8.9 100 106 97 6.8 7.7 6.8
5.0 13.8 13.2 14.5 8.9 9.6 8.8 103 107 102 6.7 7.7 6.7
6.0 13.7 12.8 14.2 8.8 9.6 8.9 108 116 105 6.7 7.7 6.7
7.0 13.7 12.6 14.1 8.6 9.7 8.9 110 121 107 6.6 7.6 6.6
8.0 13.2 . 14.1 8.5 8.8 130 108 6.6 6.6
December 14, 2004
Depth Temperature Di ssolved oxygen Specific conductance pH
(m) C C) (mg /L) (µS/cm)
B2 D2 F2 H2 B2 D2 F2 H2 B2 D2 F2 H2 B2 D2 F2 H2
0.2 11.7 10.9 10.3 10.0 9.9 9.8 9.5 10.7 92 100 101 107 7.7 7.7 7.5 7.7
1.0 11.7 10.9 10.3 9.9 9.6 9.5 92 100 100 7.7 7.6 7.5
2.0 11.7 10.9 10.3 9.9 9.6 9.4 92 100 100 7.7 7.6 7.4
3.0 11.7 10.9 10.3 9.8 9.5 9.4 92 100 100 7.6 7.5 7.4
4.0 11.7 10.9 10.3 9.8 9.5 9.3 92 100 101 7.6 7.5 7.4
5.0 11.7 10.9 10.3 9.8 9.5 9.3 92 100 101 7.6 7.5 7.4
6.0 11.7 11.0 10.3 9.7 9.5 9.3 93 100 102 7.6 7.5 7.4
7.0 11.7 9.6 93 7.5
No water quality data were collected at Station D2 for January through October 2004.
2 Stations B2, F2, and H2 data were collected on November 18 while StationD2 data were collected on November 30.
Appendix B - 14
Table B-3 (continued)
Station
Date BFB2 BFD2 BFF2 BFH2
January 20, 2004 0.9 ND' 1.2 2.02
February 22, 2004 0.8 ND 0.9 1.0
March 15, 2004 0.7 ND 0.7 1.0
April 4, 2004 0.6 ND 0.9 1.0
May 10, 2004 0.8 ND 0.8 1.02
June 21, 2004 0.9 ND 0.8 1.1
July 12, 2004 1.1 ND 0.9 0.9
August 23, 2004 0.7 ND 0.6 0.7
September 24, 2004 0.6 ND 0.7 1.0
October 18, 2004 0.3 ND 0.7 1.02
November 18 and 30', 2004 1.0 0.7 1.5 1.4
December 14, 2004 0.5 0.3 0.4 0.4
1 No Secchi disk transparency measurements were taken at Station BFD2 from January through October 2004.
2 Missing data due to either measurements were not obtained during sampling or because the Secchi disk was
observed on river or lake bottom during sampling. In such instances, the depth of the lake bottom is listed as a
reference to Secchi disk transparency depth.
3 Secchi disk transparency measurements were taken at Stations 1317132, BFF2, and BFH2 on November 18th and at
Station BFD2 on November 30th.
Appendix B - 15
Table B-4 Water temperature, dissolved oxygen, specific conductance, pH, Secchi disk
transparency, and turbidity data collected from the Pee Dee River (Stations
BF113, BF2B, BF3B, BF4B, and BF5B) below the Blewett Falls Hydroelectric
Plant during 1999.
Station BF1B
Date
oxygen conductance Secchi disk Turbidity (NTil)
01/18/99 9.1 10.7 92 6.9 18
02/02/99 8.8 11.3 81 6.8 -- 26
03/04/99 10.9 11.4 95 6.4 0.5 25
04/15/99 19.1 8.6 102 6.2 1.1 7.7
05/13/99 20.1 6.9 105 6.0 1.0 9.4
06/10/99 27.3 7.4 138 6.8 1.0 12
07/13/99 26.1 5.3 144 6.9 0.5 33
08/02/99 29.4 4.4 150 7.3 0.9 13
09/08/99 27.1 5.7 156 7.5 0.5 24
10/20/99 19.4 6.2 106 7.3 0.5 34
11/09/99 16.5 7.7 121 7.0 1.5 12
12/02/99 10.7 7.3 132 7.1 1.3 8.5
Station BF2B
Dissolved Specific
Temperature oxygen conductance Secchi disk Turbidity (NTil)
Date (C) (mg/L) (CDS/cm) pH depth (m)
01/18/99 10.4 11.4 89 6.9 44
02/02/99 9.4 11.0 78 6.7 -- 32
03/04/99 10.2 12.0 86 6.5 0.9 12
04/15/99 17.8 9.5 95 6.3 -- 48
05/13/99 22.0 8.8 112 6.6 1.5 7.8
06/10/99 27.7 7.8 148 7.3 1.6 7.4
07/13/99 24.5 7.8 136 7.0 1.7 6.2
08/02/99 32.2 8.3 162 7.3 1.8 3.8
09/08/99 27.1 8.5 160 7.4 1.9 5.0
10/20/99 19.4 7.4 104 7.4 0.7 25
11/09/99 16.3 9.6 112 7.3 1.7 6.0
12/01/99 12.6 9.9 118 6.9 1.3 11
Station BF3B
Dissolved Specific
Temperature oxygen conductance Secchi disk Turbidity (NTil)
Date (C) (mg/L) (CDS/cm) pH depth (m)
01/18/99 10.1 11.5 96 6.9 23
02/02/99 9.3 10.9 81 6.7 -- 30
03/04/99 10.7 10.7 107 6.9 0.7 18
04/15/99 17.9 9.4 124 6.3 1.2 9.1
05/13/99 21.1 7.9 133 6.4 0.8 20
06/10/99 27.6 7.6 178 7.2 0.9 15
07/13/99 24.3 7.2 189 7.0 0.8 23
08/02/99 32.3 8.2 197 7.2 0.6 9.4
09/08/99 27.9 6.8 220 7.3 0.8 19
10/20/99 19.2 7.7 109 7.3 0.6 32
11/09/99 16.0 8.5 134 7.3 1.2 6.9
12/01/99 12.4 9.3 123 6.8 1.0 17
Appendix B - 16
Table B-4 (continued)
Station BF4B
Dissolved Specific
Temperature oxygen conductance Secchi disk Turbidity
Date ($C) (mg/L) ((DS/cm) pH depth (m) (NTil)
01/18/99 9.6 11.0 90 6.8 23
02/03/99 9.6 10.8 81 6.7 -- 30
03/04/99 10.1 10.5 96 6.7 0.6 18
04/15/99 19.2 7.3 119 6.4 0.8 9.1
05/13/99 21.8 7.2 128 6.7 0.5 20
06/10/99 28.4 7.0 210 7.1 0.7 15
07/13/99 23.8 5.2 158 6.7 0.4 23
08/02/99 31.0 7.6 233 6.8 0.7 9.4
09/08/99 27.2 6.9 232 7.2 0.6 19
10/20/99 19.8 5.1 85 7.0 0.4 32
11/09/99 14.5 7.2 76 7.2 0.5 6.9
12/01/99 12.7 9.2 118 6.7 0.8 17
Station BF5B
Dissolved Specific
Temperature oxygen conductance Secchi disk Turbidity
Date ($C) (mg/L) ((DS/cm) pH depth (m) (NTil)
01/18/99 9.5 10.8 96 6.7 28
02/03/99 11.1 8.6 73 6.6 -- 21
03/04/99 10.8 10.4 98 6.5 0.5 29
04/15/99 19.1 6.6 144 6.4 0.6 24
05/13/99 21.0 5.7 97 6.6 0.6 17
06/10/99 28.3 7.6 188 7.0 0.5 34
07/13/99 27.3 6.1 194 6.6 0.7 23
08/02/99 32.1 8.0 249 7.1 0.5 27
09/08/99 26.8 6.0 229 7.2 0.5 29
10/20/99 20.3 5.0 95 7.1 0.5 26
11/09/99 15.1 7.5 131 7.0 1.0 12
12/01/99 12.6 8.4 124 6.7 0.6 29
Appendix B - 17
Table B-5 Water temperature, dissolved oxygen, specific conductance, pH, Secchi disk
transparency, and turbidity data collected from the Pee Dee River (Stations
BF113, BF2B, BF3B, BF4B, and BF5B) below the Blewett Falls Hydroelectric
Plant during 2001.
Station BF1B
Dissolved Specific
oxygen conductance Secchi disk
Date
02/20/01 11.7 10.5 130 6.9 0.7 18
03/26/01 12.6 10.2 94 6.9 0.4 43
04/10/01 19.4 10.8 115 6.8 1.2 4.9
05/09/01 23.6 9.2 147 7.2 1 5.5
06/12/01 26.9 6.3 123 7.3 1.3 4.2
07/17/01 27.6 5.3 141 7.4 0.7 14
08/19/01 29.3 4.8 188 7.3 -- 8.0
09/17/01 25.3 10.0 162 6.3 -- 4.5
10/29/01 16.5 10.4 188 6.8 2.2 3.1
11/27/01 16.5 9.4 210 7.9 -- 2.1
12/17/01 14.1 8.8 156 6.2 1.1 12
Station BF2B
Dissolved Specific
Temperature oxygen conductance Secchi disk
02/20/01 11.8 12.5 127 7.0 1.3 11
03/26/01 13.9 11.5 84 6.7 0.6 31
04/10/01 19.2 9.7 117 6.6 1.0 9.3
05/09/01 22.3 9.6 146 7.3 -- 2.2
06/12/01 27.7 7.9 136 7.9 1.9
07/17/01 28.9 8.8 173 7.2 4.3
08/19/01 28.8 7.8 189 7.4 6.9
09/17/01 23.0 10.2 167 6.7 2.6
10/29/01 13.7 13.2 146 7.7 1.6
11/27/01 17.7 10.3 200 7.9 1.5
12/17/01 13.9 11.0 152 6.3 3.5
Station BF3B
Dissolved Specific
Temperature oxygen conductance Secchi disk
Date ($C) (mg/L) ((DS/cm) pH depth (m) Turbidity (NTil)
01/16/01 9.8 12.2 126 7.3 -- 6.5
02/20/01 10.7 11.1 151 7.0 1.0 13
03/26/01 13.9 9.9 115 6.6 0.5 35
04/10/01 19.1 9.4 125 6.7 0.7 18
05/09/01 22.6 7.6 198 7.2 -- 5.3
06/12/01 27.8 7.1 148 7.2 5.4
07/17/01 28.7 7.5 173 6.9 12
08/19/01 29.3 6.0 314 7.2 10
09/17/01 24.3 8.0 211 6.0 6.5
10/29/01 17.2 11.1 326 7.0 2.6
11/27/01 18.9 8.6 292 7.5 7.7
12/17/01 14.9 9.8 216 6.2 17
Appendix B - 18
Table B-5 (continued)
Station BF4B
Dissolved Specific
Temperature oxygen conductance Secchi disk Turbidity
Date ($C) (mg/L) ((DS/cm) pH depth (m) (NTil)
01/16/01 10.3 10.6 79 6.6 0.7 13
02/20/01 10.7 11.1 109 6.6 0.5 37
03/26/01 12.5 9.2 89 6.5 0.4 47
04/10/01 18.0 8.7 113 6.5 0.7 22
05/09/01 22.8 9.3 167 7.1 -- 30
06/12/01 26.1 5.2 139 6.7 0.7 12
07/17/01 28.7 8.9 211 6.8 0.6 21
08/19/01 29.5 6.8 203 7.4 -- 21
09/17/01 22.8 9.1 240 6.3 9.1
10/29/01 15.6 11.0 197 6.8 4.1
11/27/01 17.7 8.6 310 7.5 4.5
12/17/01 14.7 8.6 244 6.4 8.6
Station BF5B
Dissolved Specific
Temperature oxygen conductance Secchi disk Turbidity
Date ($C) (mg/L) ((DS/cm) pH depth (m) (NTil)
01/16/01 8.4 11.7 115 6.5 1.0 11
02/20/01 11.7 9.8 116 6.5 0.5 40
03/26/01 12.2 8.7 91 6.4 0.5 41
04/10/01 18.0 7.1 108 6.0 0.6 17
05/09/01 22.6 7.3 179 7.0 -- 15
06/12/01 27.1 6.7 185 7.2 0.5 14
07/17/01 28.2 9.0 198 6.4 0.6 17
08/19/01 29.4 6.0 248 7.4 -- 37
09/17/01 23.1 8.1 243 6.2 -- 13
10/29/01 15.7 12.4 173 7.0 1.0 5.2
11/27/01 17.9 8.5 234 6.9 1.1 6.0
12/17/01 13.9 9.9 253 6.0 0.9 14
Missing data due to either measurements were not obtained during sampling or because the Secchi disk was
observed on river or lake bottom during sampling.
Appendix B - 19
Table B-6 Water temperature, dissolved oxygen, specific conductance, and pH data
collected from the Pee Dee River (Stations BFOB, BF1B, BF2B, BF3B, and
BF4B) below the Blewett Falls Development during 2004.
Station BFOB (Generation Flow)
Dissolved oxygen Specific conductance Turbidity
Date Temperature (BC) (mg/L) ((DS/cm) pH (NTil)
1/20/2004 6.8 12.4 92 7.7 10
2/22/2004 7.4 12.5 102 7.6 22
3/15/2004 10.5 12.2 98 7.8 24
4/4/2004 13.0 8.6 101 7.7 24
5/10/2004 22.2 9.9 99 7.5 2.2
6/21/2004 26.6 5.7 109 7.4 32
7/12/2004 28.7 5.7 105 7.1 9.7
8/23/2004 28.1 8.2 99 8.1 6.5
9/24/2004 23.7 7.3 102 7.4 18
10/18/2004 19.7 7.1 90 7.2 27
11/18/2004 14.0 8.7 103 7.1 19
12/13/2004 12.4 10.1 94 7.4 25
Station BF1B (Non Generation Flow)
Dissolved oxygen Specific conductance Turbidity
Date Temperature (BC) (mg/L) ((DS/cm) pH (NTU)
1/19/2004 7.8 12.5 94 7.8 19
2/22/2004 6.5 11.5 102 7.6 17
3/14/2004 9.9 11.1 94 7.9 17
4/4/2004 12.5 7.6 102 7.8 13
5/14/2004 23.4 7.6 94 7.3 0.6
6/22/2004 25.5 7.7 106 7.5 15
7/13/2004 27.2 3.3 102 7.0 3.0
8/23/2004 27.6 4.5 95 7.0 6.3
9/24/2004 22.5 5.9 102 7.5 9.1
10/25/2004 18.9 6.3 89 7.2 13
11/15/2004 15.0 8.0 95 6.9 6.6
12/8/2004 12.9 8.7 111 7.3 9.1
Station BF1B (Generation Flow)
Dissolved oxygen Specific conductance Turbidity
Date Temperature (BC) (mg/L) ((DS/cm) pH (NTU)
1/20/2004 7.0 13.1 90 7.8 11
2/22/2004 8.3 12.9 100 7.8 21
3/15/2004 10.8 12.2 97 7.7 27
4/4/2004 16.0 9.6 98 7.9 33
5/10/2004 22.0 6.3 99 7.2 2.1
6/21/2004 26.0 4.4 109 7.5 28
7/12/2004 29.1 4.9 102 7.0 14
8/23/2004 29.5 4.4 93 7.0 11
9/24/2004 22.5 5.8 102 7.3 19
10/18/2004 19.9 6.9 92 7.1 17
11/17/2004 14.2 8.8 115 6.7 15
12/13/2004 12.2 10.6 94 7.6 23
Appendix B - 20
Table B-6 (continued)
Station BF2B (Non Generation Flow)
Dissolved oxygen Specific conductance Turbidity
Date Temperature (BC) (mg/L) (cpS/cm) pH (NTU)
1/18/2004 7.7 12.6 88 7.9 2.2
2/25/2004 7.9 11.9 105 7.7 19
3/14/2004 12.5 12.7 96 7.9 17
4/4/2004 13.2 9.8 97 8.0 9
5/14/2004 22.8 9.1 93 7.4 0.7
6/21/2004 27.3 7.9 103 8.1 12
7/12/2004 31.1 8.4 104 9.2 1.2
8/23/2004 27.2 7.4 97 7.6 7
9/24/2004 23.4 7.7 104 7.5 14
10/18/2004 20.1 8.9 90 7.5 15
11/15/2004 14.5 10.1 95 7.0 16
12/8/2004 13.8 10.2 105 7.1 12
Station BF2B (Generation Flow)
Temperature (BC) Dissolved oxygen Specific conductance Turbidity
Date (mg/L) ((DS/cm) pH (NTU)
1/20/2004 6.8 13.9 93 8.6 13
2/22/2004 8.5 13.0 99 7.7 34
3/15/2004 13.0 11.4 95 7.8 29
4/6/2004 14.0 11.2 104 7.8 9.5
5/10/2004 21.0 8.7 98 7.2 1.4
6/23/2004 26.8 6.5 105 7.3 52
7/15/2004 30.2 8.2 113 8.1 5.6
8/26/2004 27.4 6.8 102 7.5 9.8
9/22/2004 21.6 6.9 112 7.3 20
10/21/2004 20.9 6.4 78 7.4 24
11/17/2004 14.8 10.5 94 7.1 25
12/14/2004 11.1 10.6 93 7.7 11.2
Station BF3B (Generation Flow)
Dissolved oxygen Specific conductance Turbidity
Date Temperature (BC) (mg/L) ((DS/cm) pH (NTU)
1/21/2004 5.9 12.9 103 7.9 12
2/25/2004 9.1 11.8 116 7.6 21
3/14/2004 11.8 11.6 99 7.6 19
4/6/2004 14.5 10.1 124 7.4 16
5/12/2004 23.0 7.9 115 7.5 1.5
6/23/2004 27.7 7.3 136 7.1 47
7/15/2004 30.4 6.7 129 8.0 15
8/26/2004 28.2 7.0 151 7.5 16
9/22/2004 22.5 7.0 126 7.3 24
10/21/2004 20.8 7.9 103 7.2 19
11/17/2004 13.9 9.1 109 6.9 18
12/14/2004 11.7 9.5 99 7.5 19
Appendix B - 21
Table B-6 (continued)
Station BF4B (Generation Flow)
Dissolved oxygen Specific conductance Turbidity
Date Temperature (BC) (mg/L) (cpS/cm) pH (NTU)
1/21/2004 7.2 11.5 135 7.6 16
2/25/2004 9.2 11.5 112 7.5 22
3/14/2004 12.2 11.0 105 7.5 25
4/6/2004 15.5 8.8 110 7.0 25
5/12/2004 22.1 7.5 122 7.4 2.9
6/23/2004 28.6 6.2 182 7.2 39
7/15/2004 30.5 5.9 160 7.8 52
8/26/2004 27.7 6.7 149 7.2 12
9/22/2004 21.5 3.1 98 6.8 16
10/21/2004 20.5 7.6 111 7.1 21
11/18/2004 12.6 9.5 117 7.1 21
12/14/2004 11.9 9.5 102 7.4 34
Appendix B - 22
APPENDIX C
RAW DATA LISTING FOR WATER CHEMISTRY PARAMETERS
COLLECTED IN LAKE TILLERY, THE PEE DEE RIVER, AND THE
ROCKY RIVER DURING 2000, 2002, AND 2004
Table C-1 Concentrations of water chemistry parameters in Lake Tillery (Stations
TYB2, TYF2, and TYK2) and the Pee Dee River (Stations TY1B and TY12B)
during 2000.1
Lake Tillery (Station TYB2, surface) -2000
Month Total Hardness Cl- SO-q Ca 2+ Mg2+ Na TN NH3-N Nitrate + TP
Alkalinity (calculated) nitrite-N
Jan 32 22 13 10 5.2 2.1 11 0.37 < 0.05 < 0.02 0.037
Feb 27 24 13 9.0 5.6 2.3 12 0.94 <0.05 0.61 0.032
Mar 24 24 12 8.0 5.8 2.4 11 0.87 < 0.05 0.35 0.049
Apr 28 25 11 8.0 6.0 2.5 11 0.94 < 0.05 0.53 0.040
May 22 23 12 9.3 5.5 2.3 9.1 0.75 0.08 0.57 0.028
Jun 21 20 11 7.0 4.3 2.2 8.4 0.59 < 0.05 0.31 0.012
Jul 21 22 7.0 8.0 4.9 2.3 9.3 0.31 < 0.05 0.05 0.018
Aug 28 20 12 8.0 4.4 2.2 8.6 0.64 < 0.05 0.02 0.016
Sep 27 21 12 8.0 4.7 2.3 9.7 0.18 <0.05 0.07 0.018
Oct 28 20 13 7.0 4.5 2.2 10 <0.50 <0.05 0.02 0.018
Nov 26 20 14 9.0 4.4 2.2 11 0.56 < 0.05 0.22 0.030
Dec 30 22 15 10 5.0 2.4 13 0.62 0.11 0.22 0.030
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.0 8.7 72 <5 73 130 1.6 <0.2 NV 21
Feb 2.9 7.0 78 <5 67 160 1.4 <0.2 <2 <20
Mar 3.2 5.4 88 <5 74 98 2.3 <0.2 3.0 <20
Apr 3.5 8.3 92 <5 83 250 2.0 <0.2 <2 <20
May 3.8 7.0 54 <5 80 <100 1.7 <0.2 <2 <20
Jun 3.4 5.1 70 <5 61 <50 1.5 <0.2 <2 <20
Jul 3.3 3.5 56 <5 61 <50 1.2 <0.2 <2 48
Aug 3.7 1.7 62 <3 68 <50 1.6 <0.2 <2 <20
Sep 4.1 2.6 68 <3 83 67 1.2 <0.2 <2 <20
Oct 3.3 2.9 58 <5 67 71 1.9 <0.2 <2 <20
Nov 3.4 3.7 72 <5 81 59 1.3 <0.2 <2 <20
Dec 3.7 5.7 60 <5 39 <50 1.6 <0.2 <2 <20
Appendix C - 1
Table C-1 (continued)
Lake Tillery (Station TYB2, bottom)-2000
Month Total Hardness CI SO4 Cap' Mgr' Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 24 21 13 10 5.1 2.1 11 0.83 <0.05 0.52 0.035
Feb 29 25 12 9.0 6.0 2.5 12 0.59 <0.05 0.59 0.033
Mar 20 24 12 8.0 5.8 2.4 11 0.86 < 0.05 0.56 0.056
Apr 26 25 12 8.0 5.9 2.5 10 0.97 < 0.05 0.60 0.040
May 21 23 11 9.0 5.4 2.2 8.9 0.64 0.06 0.64 0.044
Jun 23 13 11 7.0 4.9 2.2 8.0 0.62 0.10 0.62 0.036
Jul 23 24 7.0 8.0 5.5 2.4 9.0 0.69 < 0.05 0.39 0.020
Aug 32 23 12 7.0 5.2 2.4 8.8 0.91 0.20 0.06 0.058
Sep 27 22 12 7.0 4.9 2.4 10 0.37 <0.05 0.07 0.020
Oct 30 21 13 8.0 4.6 2.3 11 0.81 <0.05 0.04 0.036
Nov 24 20 14 9.0 4.3 2.2 11 0.57 <0.05 0.23 0.026
Dec 30 22 14 9.0 4.8 2.3 12 0.59 <0.05 0.23 0.030
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.1 9.8 72 6.0 52 170 1.4 < 0.2 ND < 20
Feb 2.9 19 86 <5 71 180 1.5 <0.2 <2 <20
Mar 3.1 8.8 92 <5 83 280 2.7 <0.2 <2 <20
Apr 3.4 15 100 <5 86 330 2.2 <0.2 <2 <20
May 3.6 20 68 8.0 81 160 1.7 <0.2 <2 <20
Jun 3.1 14 72 < 5 76 140 2.1 0.2 < 2 < 20
Jul 3.2 5.0 46 <5 66 <50 <1.0 0.3 <2 <20
Aug 3.3 15 74 <3 82 <50 1.3 0.9 <2 <20
Sep 4.2 8.0 82 <3 76 <50 1.4 0.4 <2 <20
Oct 3.7 12 60 <5 69 120 1.8 0.5 <2 34
Nov 3.4 5.5 86 <5 84 120 1.4 <0.2 <2 <20
Dec 3.8 7.0 70 <5 51 63 1.7 <0.2 <2 <20
Appendix C - 2
Table C-1 (continued)
Lake Tillery (Station TYF2, surface)-2000
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 24 22 12 10 5.3 2.2 11 0.86 < 0.05 0.57 0.039
Feb 24 25 11 8.0 5.9 2.6 9.5 0.64 <0.05 0.47 0.070
Mar 24 25 13 8.0 5.9 2.4 11 0.98 < 0.05 0.45 0.080
Apr 27 25 12 8.0 5.9 2.4 10 0.95 < 0.05 0.56 0.048
May 21 23 11 9.0 5.5 2.3 9.0 0.52 0.06 0.52 0.055
Jun 21 20 11 7.0 4.2 2.2 8.2 0.28 < 0.05 0.28 0.018
Jul 22 22 8.0 8.0 5.0 2.4 9.6 0.28 < 0.05 < 0.02 0.024
Aug 24 20 11 7.0 4.5 2.3 9.1 0.64 < 0.05 0.02 0.024
Sep 25 20 12 7.0 4.4 2.2 9.8 0.28 <0.05 0.02 0.028
Oct 31 19 13 8.0 4.2 2.1 10 1.1 <0.05 <0.02 0.031
Nov 26 19 9.0 9.0 4.3 2.1 11 0.68 < 0.05 0.32 0.028
Dec 30 24 11 11 5.6 2.4 13 0.75 0.07 0.40 0.028
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.7 8.7 66 <5 79 150 1.6 <0.2 ND <20
Feb 4.1 46 94 19 81 1,200 4.2 <0.2 <2 <20
Mar 4.0 7.2 90 6.0 68 150 1.7 <0.2 4.0 <20
Apr 3.5 8.4 92 <5 92 250 2.0 <0.2 2.0 23
May 3.9 8.7 74 6.0 81 <100 1.9 <0.2 4.0 <20
Jun 3.4 3.8 66 <5 66 <50 2.0 <0.2 <2 21
Jul 3.5 3.5 52 <5 57 <50 1.0 <0.2 <2 <20
Aug 3.8 2.2 66 <3 72 <50 1.3 <0.2 <2 <20
Sep 3.6 3.6 92 <3 76 <50 1.1 <0.2 <2 <20
Oct 3.8 3.5 60 <5 60 <50 1.4 <0.2 3.0 45
Nov 3.9 3.0 78 <5 88 <50 1.4 <0.2 <2 <20
Dec 3.6 3.8 70 <5 43 <50 2.0 <0.2 <2 <20
Appendix C - 3
Table C-1 (continued)
Lake Tillery (Station TYF2, bottom)-2000
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 29 22 13 10 5.3 2.2 11 0.74 < 0.05 0.59 0.068
Feb 22 26 11 8.0 5.8 2.7 9.1 0.66 <0.05 0.47 0.065
Mar 20 25 12 8.0 6.0 2.4 11 0.84 < 0.05 0.55 0.052
Apr 26 25 11 8.0 5.9 2.4 10 0.96 < 0.05 0.62 0.041
May 24 26 9.9 7.8 6.0 2.6 6.8 0.70 0.10 0.45 0.054
Jun 23 20 11 7.0 4.5 2.2 8.1 0.43 0.05 0.43 0.025
Jul 24 24 11 8.0 5.6 2.5 9.6 0.56 < 0.05 0.36 0.020
Aug 28 22 12 8.0 5.0 2.4 10 0.79 0.06 0.18 0.026
Sep 33 22 13 8.0 4.8 2.3 11 0.40 0.13 0.09 0.037
Oct 30 21 15 9.0 4.7 2.3 12 1.1 <0.05 0.20 0.023
Nov 24 20 10 9.0 4.5 2.2 12 0.72 < 0.05 0.31 0.044
Dec 39 23 11 11 5.3 2.3 13 0.77 0.61 0.41 0.026
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.7 11 70 <5 75 150 1.1 <0.2 ND <20
Feb 3.9 50 96 8.0 83 2,000 4.5 <0.2 <2 <20
Mar 3.3 8.7 76 <5 84 230 1.9 0.2 <2 20
Apr 3.5 13 94 <5 97 300 2.3 <0.2 <2 <20
May 5.1 23 74 9.0 90 < 100 2.3 0.5 < 2 < 20
Jun 3.5 11 80 9.0 69 <50 1.4 0.2 <2 <20
Jul 3.3 4.7 48 <5 60 53 3.0 0.2 <2 <20
Aug 3.4 5.7 72 <3 80 <50 1.4 <0.2 <2 <20
Sep 3.3 11 104 5.2 92 120 1.5 <0.2 <2 <20
Oct 3.6 8.3 62 <5 67 110 2.0 0.3 <2 21
Nov 3.7 11 88 <5 89 89 1.5 <0.2 <2 <20
Dec 4.0 6.3 76 <5 59 <50 1.5 <0.2 <2 <20
Appendix C - 4
Table C-1 (continued)
Lake Tillery (Station TYK2, surface)-2000
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 24 23 13 10 5.5 2.4 11 0.62 < 0.05 0.62 0.043
Feb 27 24 12 9.0 5.8 2.3 11 0.70 0.09 0.53 0.038
Mar 20 25 13 8.0 6.1 2.4 11 0.82 < 0.05 0.52 0.059
Apr 23 24 11 8.0 5.6 2.3 9.9 0.98 0.08 0.65 0.044
May 21 23 12 9.4 5.4 2.2 9.0 1.0 0.09 0.62 0.043
Jun 23 20 11 7.0 4.5 2.2 8.3 0.66 < 0.05 0.42 0.026
Jul 24 24 12 8.0 5.4 2.5 11 0.41 < 0.05 0.26 0.022
Aug 28 24 12 8.0 5.3 2.5 11 0.85 < 0.05 0.19 0.029
Sep 31 22 9.0 8.0 4.9 2.3 12 0.25 <0.05 0.07 0.025
Oct 31 21 9.0 8.0 4.7 2.2 13 1.0 <0.05 0.26 0.024
Nov 24 20 14 10 4.6 2.1 12 0.74 < 0.05 0.40 0.030
Dec 13 23 16 11 5.4 2.4 13 0.76 <0.05 0.45 0.024
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.6 9.1 72 7.0 74 440 1.5 <0.2 ND <20
Feb 2.8 20 86 <5 82 540 1.8 <0.2 <2 <20
Mar 3.6 9.6 76 <5 80 280 1.9 <0.2 <2 <20
Apr 3.5 11 98 <5 95 360 1.9 <0.2 <2 <20
May 3.2 8.8 54 <5 83 <100 1.4 <0.2 <2 <20
Jun 3.2 5.9 78 <5 53 73 1.2 <0.2 <2 <20
Jul 2.8 5.0 50 <5 68 <50 <1.0 <0.2 <2 <20
Aug 3.6 4.8 76 <3 81 <50 1.3 <0.2 <2 <20
Sep 3.4 3.6 98 <3 90 <50 1.3 <0.2 <2 <20
Oct 3.4 4.0 66 <5 56 <50 1.6 <0.2 <2 38
Nov 3.8 2.8 90 <5 89 <50 1.3 <0.2 <2 <20
Dec ND 3.6 74 <5 69 <50 1.8 <0.2 <2 <20
Appendix C - 5
Table C-1 (continued)
Lake Tillery (Station TYK2, bottom)-2000
Month Total
Alkalinity Hardness
(calculated) CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+
nitrite-N TP
Jan 24 22 13 10 5.2 2.1 11 0.95 < 0.05 0.62 0.046
Feb 24 24 12 9.0 5.8 2.3 11 0.85 <0.05 0.55 0.058
Mar 24 24 13 8.0 5.7 2.3 11 0.92 <0.05 0.58 0.060
Apr 23 24 11 8.0 5.7 2.3 10 1.02 < 0.05 0.65 0.044
May 21 31 11 9.3 5.3 2.2 9.1 0.62 0.09 0.62 0.042
Jun 23 21 10 7.0 4.6 2.2 8.2 0.43 <0.05 0.43 0.032
Jul 23 23 12 8.0 5.3 2.4 11 0.27 < 0.05 0.27 0.050
Aug 32 23 13 8.0 5.2 2.4 11 0.80 <0.05 0.12 0.028
Sep 29 22 13 8.0 4.9 2.3 12 0.21 0.06 0.07 0.025
Oct 31 21 14 9.0 4.7 2.2 13 1.1 <0.05 0.29 0.026
Nov 26 20 10 10 4.5 2.1 11 0.74 < 0.05 0.40 0.032
Dec 30 23 16 10 5.4 2.4 14 0.87 0.08 0.47 0.024
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.6 8.6 78 <5 78 160 1.5 <0.2 ND <20
Feb 3.0 20 94 <5 77 680 2.6 <0.2 <2 <20
Mar 3.7 9.8 82 <5 76 330 1.8 <0.2 <2 <20
Apr 3.7 11 90 <5 88 360 2.2 <0.2 <2 31
May 3.3 8.9 58 <5 84 110 2.0 <0.2 <2 <20
Jun 3.2 6.0 70 6.0 71 71 1.3 <0.2 <2 <20
Jul 2.9 8.1 50 <5 59 <50 <1.0 0.3 <2 <20
Aug 3.8 4.2 72 <3 84 <50 1.6 0.4 <2 <20
Sep 3.7 3.5 92 <3 96 <50 1.4 0.5 <2 <20
Oct 3.6 4.3 58 <5 57 94 2.9 0.2 <2 36
Nov 3.6 2.8 92 <5 82 76 1.4 <0.2 <2 <20
Dec 3.6 3.5 66 <5 66 <50 2.2 <0.2 <2 <20
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
2 ND means no data collected for that particular station location, depth, and sample date.
Appendix C - 6
Table C-2 Concentrations of water chemistry parameters in Lake Tillery (Stations
TYB2, TYF2, and TYK2) during 2002.1
Lake Tillery (Station TYB2, surface) -2002
Month Total Hardness CI SOq Ca 2+ Mg2+ Na TN NH3-N Nitrate + TP
Alkalinity (calculated) nitrite-N
Jan 32 26 12 12 6.8 2.2 13 <0.10 0.02 0.26 0.024
Feb 28 25 15 13 6.4 2.3 12 0.37 0.05 0.07 0.042
Mar 24 26 14 12 6.6 2.3 9.9 0.48 <0.02 0.55 0.031
Apr 25 29 11 12 6.6 3.0 10 1.45 <0.02 0.54 0.027
May 18 26 10 12 6.7 2.4 10 0.37 <0.02 0.32 0.020
Jun 27 40 14 11 9.7 3.8 9.1 0.44 <0.02 0.14 0.020
Jul 21 29 11 12 4.8 4.0 11 0.31 <0.02 <0.02 0.020
Aug 23 12 9.5 12 2.3 1.6 13 0.46 <0.02 <0.02 0.018
Sep 24 8.2 11 13 1.4 1.2 11 0.33 <0.02 <0.02 0.014
Oct 22 8.6 12 14 1.7 1.0 10 0.51 0.03 0.21 0.024
Nov 26 21 10 14 4.9 2.2 11 0.45 0.02 0.36 0.026
Dec 20 23 7.4 17 5.3 2.5 6.5 1.39 0.08 0.59 0.052
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.6 3.0 77 1.6 74 88 2.2 <0.2 <2 16
Feb 3.4 11 90 7.8 86 197 2.1 <0.2 2 14
Mar 2.3 5.0 68 <1.0 97 316 2.2 <0.2 <2 <10
Apr 2.9 3.3 57 4.8 80 57 1.9 <0.2 <2 17
May 3.4 2.8 73 1.6 44 <50 1.6 <0.2 2 <10
Jun 3.8 2.7 85 3.6 71 <50 1.1 <0.2 <2 16
Jul 3.3 1.5 72 2.8 63 <50 1.8 <0.2 <2 17
Aug 2.7 2.0 63 2.0 97 <50 1.2 <0.2 <2 13
Sep 2.8 1.5 68 1.0 62 <50 <1.0 <0.2 <2 21
Oct 4.9 4.9 56 1.2 72 644 1.7 <0.2 <2 13
Nov 3.8 3.6 83 3.6 88 309 1.6 <0.2 <2 18
Dec 4.4 18 74 4.0 78 176 3.0 <0.2 <2 22
Appendix C - 7
Table C-2 (continued)
Lake Tillery (Station TYB2, bottom)-2002
Month Total
Alkalinity Hardness
(calculated) CI SO4 Cap' Mgr' Na TN NH3-N Nitrate+
nitrite-N TP
Jan 31 26 13 12 6.7 2.6 14 0.54 0.02 0.29 0.062
Feb 28 25 15 12 6.3 2.2 12 0.34 0.03 0.12 0.051
Mar 25 27 16 12 6.8 2.4 11 0.53 < 0.02 0.64 0.030
Apr 22 27 14 12 6.1 2.8 9.8 1.19 0.05 0.67 0.039
May 20 26 11 12 6.6 2.4 10 0.27 < 0.02 0.59 0.021
Jun 25 38 13 10 9.3 3.5 8.4 0.38 0.05 0.42 0.018
Jul 21 32 11 12 5.9 4.1 11 0.18 0.04 0.4 0.021
Aug 37 18 9.2 8.2 4.3 1.7 12 0.71 0.41 <0.02 0.089
Sep 36 11 10 5.1 2.5 1.2 8.4 0.86 0.55 <0.02 0.184
Oct 22 8.7 13 14 1.8 1.0 11 0.51 0.05 0.22 0.031
Nov 25 18 11 14 3.6 2.1 11 0.47 0.03 0.36 0.027
Dec 18 24 7.0 18 5.4 2.5 6.3 1.27 0.25 0.57 0.066
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 4.4 4.5 88 29 79 402 2.1 <0.2 <2 13
Feb 3.6 17 100 8.4 82 280 2.6 <0.2 <2 15
Mar 2.2 21 79 1.2 106 245 2.2 <0.2 <2 11
Apr 2.5 21 70 9.8 92 248 2.2 <0.2 <2 17
May 2.9 18 74 5.4 46 137 1.7 <0.2 <2 <10
Jun 3.5 5.0 90 4.2 78 98 1.2 <0.2 <2 12
Jul 2.6 2.5 84 1.2 70 <50 <1.0 <0.2 <2 12
Aug 3.0 2.8 75 1.2 110 <50 <1.0 <0.2 <2 15
Sep 5.2 23 87 7.7 75 351 1.0 <0.2 3.4 32
Oct 4.6 ND 75 3.6 77 1,324 1.9 <0.2 <2 14
Nov 3.6 6.5 79 4.2 83 307 1.9 <0.2 <2 20
Dec 4.6 27 77 10 69 203 2.2 <0.2 <2 20
Appendix C - 8
Table C-2 (continued)
Lake Tillery (Station TYF2, surface)-2002
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 32 25 13 12 6.2 2.2 14 0.58 0.23 0.43 0.026
Feb 28 25 16 13 6.3 2.3 13 0.28 0.08 0.15 0.034
Mar 23 25 14 12 6.1 2.3 9.1 0.38 <0.02 0.69 0.041
Apr 19 27 14 13 6.1 2.9 9.6 1.96 <0.02 0.53 0.029
May 19 36 11 12 8.8 3.3 9.4 0.49 <0.02 0.34 0.025
Jun 27 39 14 11 9.6 3.7 8.9 0.45 <0.02 0.08 0.021
Jul 22 27 11 12 4.5 3.9 11 0.32 <0.02 <0.02 0.024
Aug 23 14 9.9 13 3.1 1.6 13 0.40 <0.02 <0.02 0.024
Sep 25 8.6 10 14 1.6 1.1 11 0.38 <0.02 0.02 0.026
Oct 27 9.4 16 14 2.1 <1.0 14 0.60 0.03 0.38 0.026
Nov 24 26 11 13 6.5 2.2 8.7 0.49 0.06 0.50 0.049
Dec 19 24 7.7 15 5.6 2.5 7.0 1.14 0.09 0.70 0.056
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 8.5 2.9 86 2.2 84 50 1.7 <0.2 <2 14
Feb 2.6 7.1 82 5.2 85 121 1.9 <0.2 <2 <10
Mar 2.4 9.7 79 1.4 102 214 2.1 <0.2 <2 <10
Apr 2.5 4.4 78 4.2 92 66 2.0 <0.2 <2 16
May 3.4 2.8 65 3.4 38 <50 1.6 <0.2 2.6 <10
Jun 4.5 3.2 90 3.8 74 <50 1.1 <0.2 <2 17
Jul 3.3 2.0 80 1.8 72 <50 1.8 <0.2 <2 14
Aug 2.8 3.1 70 2.0 123 <50 1.2 <0.2 <2 16
Sep 3.1 3.4 78 3.0 63 233 1.0 <0.2 <2 28
Oct 4.3 6.4 82 2.0 82 360 4.6 <0.2 <2 15
Nov 4.7 18 103 5.5 88 733 2.7 <0.2 <2 19
Dec 3.8 30 81 6.2 84 110 3.1 <0.2 <2 16
Appendix C - 9
Table C-2 (continued)
Lake Tillerv (Station TYF2. bottom)-2002
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 33 25 14 13 6.2 2.2 14 0.66 0.40 0.42 0.026
Feb 28 26 16 12 6.4 2.3 13 0.32 0.05 0.10 0.036
Mar 24 26 14 12 6.4 2.4 9.7 0.52 <0.02 0.72 0.073
Apr 20 28 14 12 6.2 3.1 9.7 1.20 0.04 0.61 0.059
May 17 33 10 12 8.3 2.9 9.1 0.29 0.04 0.53 0.032
Jun 21 39 13 10 9.6 3.7 8.6 0.58 0.11 0.38 0.038
Jul 24 38 10 11 7.9 4.4 10 0.55 0.13 0.30 0.032
Aug 37 16 9.7 10 4.0 1.6 12 0.74 0.38 <0.02 0.064
Sep 22 11 7.5 12 2.4 1.2 6.0 0.65 0.20 0.15 0.063
Oct 26 9.7 16 15 2.2 1.0 14 0.56 0.02 0.38 0.028
Nov 24 27 11 11 7.0 2.3 8.8 0.56 0.05 0.50 0.059
Dec 21 25 8.1 12 5.7 2.5 7.1 1.05 0.09 0.68 0.056
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 4.6 3.6 80 2.2 76 68 2.0 < 0.2 < 2 14
Feb 2.6 8.3 80 5.2 91 143 1.7 <0.2 <2 11
Mar 2.5 28 88 13 106 743 2.9 <0.2 <2 11
Apr 2.6 14 109 38 89 1835 4.0 < 0.2 < 2 19
May 2.9 13 70 7.0 36 217 2.0 <0.2 <2 <10
Jun 3.2 10 99 11 80 249 1.3 <0.2 <2 <10
Jul 2.5 3.5 91 11 76 <50 2.1 <0.2 <2 <10
Aug 2.8 3.5 77 2.6 118 80 <1 <0.2 <2 15
Sep 7.6 32 92 9.0 75 3100 2.6 <0.2 <2 40
Oct 4.3 ND 89 3.0 85 720 1.7 < 0.2 < 2 17
Nov 4.8 18 107 7.8 83 813 1.9 <0.2 <2 19
Dec 3.9 11 68 3.0 62 131 2.2 <0.2 <2 19
Appendix C - 10
Table C-2 (continued)
Lake Tillery (Station TYK2, surface)-2002
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 29 23 14 12 5.6 2.1 14 0.56 0.17 0.54 0.028
Feb 28 23 17 12 5.9 2.1 12 0.27 0.03 0.08 0.032
Mar 23 25 15 12 6.2 2.3 10 0.48 <0.02 0.79 0.04
Apr 20 26 14 13 5.9 2.8 9.8 1.39 0.04 0.64 0.034
May 17 30 10 14 7.4 3.0 8.4 0.29 <0.02 0.54 0.022
Jun 25 39 12 11 9.4 3.8 9.2 0.50 <0.02 0.49 0.019
Jul 23 33 11 11 6.7 4.0 11 0.31 0.02 0.32 0.030
Aug 31 16 11 13 3.8 1.6 14 0.47 0.07 0.11 0.024
Sep 30 10 13 14 2.2 1.1 13 0.38 0.05 0.20 0.016
Oct 27 10 16 16 2.4 1.0 15 0.51 0.03 0.42 0.027
Nov 24 26 12 16 6.6 2.2 9.9 0.36 0.07 0.59 0.061
Dec 17 26 8.7 16 6.1 2.7 7.8 1.15 0.08 0.69 0.060
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 4.3 3.4 76 1.6 64 56 1.8 <0.2 <2 <10
Feb 2.7 5.4 80 4.4 89 90 1.4 <0.2 <2 11
Mar 2.2 7.2 76 <1.0 110 178 2.2 <0.2 <2 <10
Apr 2.5 4.5 75 4.8 96 75 2.3 <0.2 <2 14
May 2.8 2.8 70 3.0 41 <50 1.8 <0.2 <2 <10
Jun 3.1 3.6 86 3.4 77 56 1.6 <0.2 <2 <10
Jul 2.7 4.3 89 5.2 66 <50 1.8 <0.2 <2 12
Aug 3.0 2.8 82 1.6 133 <50 <1.0 <0.2 <2 30
Sep 3.1 1.0 99 1.0 80 <50 <1.0 <0.2 <2 22
Oct 4.4 3.1 79 <1.0 88 58 2.3 <0.2 <2 15
Nov 3.7 13 113 5.2 80 401 <1.0 <0.2 <2 18
Dec 3.8 12 94 6.8 69 152 2.2 <0.2 <2 19
Appendix C - 11
Table C-2 (continued)
Lake Tillery (Station TYK2, bottom)-2002
Month Total
Alkalinity Hardness
(calculated) CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+
nitrite-N TP
Jan 30 23 14 14 5.8 2.1 14 0.54 0.11 0.56 0.028
Feb 28 24 16 12 6.1 2.2 13 0.29 0.03 0.08 0.036
Mar 23 25 15 12 6.3 2.3 10 0.45 < 0.02 0.79 0.042
Apr 20 26 14 13 5.8 2.7 9.6 1.38 0.04 0.65 0.034
May 16 30 9.9 12 7.2 2.9 8.3 0.35 <0.02 0.54 0.021
Jun 24 38 13 11 9.1 3.7 8.9 0.49 <0.02 0.49 0.018
Jul 22 35 12 12 7.1 4.2 12 0.48 <0.02 0.31 0.042
Aug 30 15 11 13 3.6 1.5 14 0.69 0.06 0.06 0.020
Sep 30 11 14 12 2.3 1.2 14 0.36 0.04 0.21 0.016
Oct 26 9.7 16 16 2.2 < 1.0 14 0.60 0.03 0.42 0.032
Nov 25 25 12 16 6.4 2.1 9.8 0.36 0.06 0.59 0.062
Dec 21 24 8.3 15 5.7 2.5 7.3 1.06 0.08 0.72 0.062
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.8 3.4 82 <1.0 80 74 2.0 <0.2 <2 10
Feb 2.7 5.3 83 4.8 95 110 1.6 <0.2 <2 <10
Mar 2.2 13 81 2.8 100 200 4.8 < 0.2 < 2 <10
Apr 2.5 7.0 84 5.0 91 78 2.2 <0.2 <2 14
May 3.2 7.6 62 2.4 48 <50 2.0 <0.2 <2 <10
Jun 3.3 3.8 90 2.2 71 <50 1.1 <0.2 <2 10
Jul 2.9 3.9 79 4.0 75 64 1.8 < 0.2 < 2 <10
Aug 3.0 3.2 79 3.3 126 <50 <1.0 <0.2 <2 14
Sep 3.0 1.4 98 <1.0 80 80 <1.0 <0.2 <2 24
Oct 4.3 ND 78 2.0 86 670 2.9 <0.2 <2 18
Nov 3.6 15 119 5.2 70 338 <1.0 <0.2 <2 18
Dec 3.8 12 99 7.4 64 139 2.2 <0.2 <2 20
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
Appendix C - 12
Table C-3 Concentrations of water chemistry parameters in Lake Tillery (Stations
TYB2, TYF2, and TYK2) during 2004.1
Lake Tillery (Station TYB2, surface)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 21 5.4 9.6 5.8 2.2 < 1 4.7 0.63 0.04 0.71 0.039
Feb 23 23 8.0 6.3 5.7 2.2 6.4 0.34 0.06 0.74 0.047
Mar 19 21 9.3 7.2 5.1 2.0 6.2 0.51 <0.02 0.71 0.041
Apr 20 22 11 5.5 5.2 2.3 6.8 0.45 < 0.02 0.62 0.027
May 22 22 7.5 5.2 4.9 2.4 7.1 0.43 <0.02 0.33 0.021
Jun 21 20 7.4 5.2 4.3 2.2 6.3 1.32 0.05 0.06 0.026
Jul 17 24 13 5.7 4.8 2.8 5.5 0.58 <0.02 0.03 0.020
Aug 26 21 7.0 5.7 4.8 2.2 7.2 0.54 0.06 <0.02 0.018
Sep 23 22 7.1 5.8 5.0 2.2 8.2 0.42 0.06 0.40 0.037
Oct 16 20 8.8 5.2 4.9 1.8 5.3 0.56 0.07 0.45 0.036
Nov 19 20 9.1 9.7 4.8 1.9 4.6 0.42 <0.02 0.54 0.029
Dec 22 38 6.2 5.2 7.6 4.7 7.7 0.54 0.08 0.61 0.040
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.2 5.8 70 2.9 66 140 1.4 <0.2 <2 <10
Feb 2.0 11 78 5.2 60 126 1.5 <0.2 2.0 <10
Mar 2.3 12 123 5.2 103 258 1.9 <0.2 <2 10
Apr 2.4 5.6 82 3.9 66 63 2.0 <0.2 <2 <10
May 2.5 2.4 74 2.8 71 75 1.5 <0.2 <2 <10
Jun 2.7 3.5 74 3.9 90 34 1.5 < 0.2 2.3 <10
Jul 2.7 0.6 50 2.8 60 <50 1.4 <0.2 <2 <10
Aug 2.6 0.2 70 2.4 58 <50 <2 <0.2 <2 <10
Sep 3.1 3.6 76 2.8 86 145 2.0 <0.2 <2 <10
Oct 4.5 5.2 72 3.0 64 288 2.1 <0.2 <2 <10
Nov 3.5 9.3 68 4.1 56 136 3.1 <0.2 <2 11
Dec 2.8 7.6 64 5.5 59 242 2.3 <0.2 <2 <10
Appendix C - 13
Table C-3 (continued)
Lake Tillery (Station TYB2, bottom)-2004
Month Total Hardness CF SO4 Ca2+ Mgz+ Na TN NH3-N Nitrate+ TP
Jan 19 5.1 9.1 5.6 2.0 < 1.0
Feb 22 23 12 5.5 5.6 2.2
Mar 18 21 9.6 6.4 5.0 2.0
Apr 20 26 11 6.3 5.8 2.8
May 21 25 7.6 5.1 5.8 2.5
Jun 21 22 7.3 6.0 5.3 2.2
Jul 26 25 12 3.0 5.0 3.0
Aug 28 22 7.4 5.3 5.1 2.2
Sep 23 22 7.4 5.1 5.2 2.2
Oct 17 19 11 5.1 4.6 1.8
Nov 18 18 9.0 5.3 4.4 1.8
Dec 22 21 6.4 6.3 5.0 2.1
nitrite-N
4.6 0.36 0.06 0.71 0.045
6.6 0.38 0.12 0.75 0.048
6.0 0.83 0.06 0.74 0.05C
7.2 0.63 0.05 0.64 0.158
7.3 0.27 0.02 0.55 0.042
6.3 1.4 0.06 0.47 0.011
5.5 0.72 0.23 0.28 0.03S
7.1 0.60 0.10 0.21 0.03C
8.3 0.70 0.07 0.42 0.045
4.5 0.59 0.09 0.50 0.05E
4.3 0.40 <0.02 0.53 0.032
4.9 0.39 0.08 0.61 0.041
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.3 23 77 7.7 66 160 1.6 < 0.2 < 2 <10
Feb 2.2 36 80 6.3 58 352 1.5 <0.2 <2 <10
Mar 2.4 14 106 9.8 109 653 2.2 <0.2 <2 <10
Apr 3.5 17 110 48 56 4,780 7.5 <0.2 <2 16
May 2.2 19 94 8.8 74 322 1.9 <0.2 <2 <10
Jun 2.3 2.8 74 2.9 84 59 2.7 <0.2 <2 <10
Jul 2.4 6.0 71 4.1 56 142 1.4 <0.2 <2 <10
Aug 2.7 33 78 3.8 60 195 <2 <0.2 <2 <10
Sep 3.2 8.9 80 7.4 81 328 2.0 <0.2 <2 <10
Oct 5.2 16 76 6.0 66 572 2.4 <0.2 <2 <10
Nov 3.5 4.3 68 4.8 57 191 2.7 <0.2 <2 14
Dec 2.8 44 64 5.4 70 240 2.0 <0.2 <2 <10
Appendix C - 14
Table C-3 (continued)
Lake Tillery (Station TYF2, surface)-2004
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 15 5.7 8.9 5.0 2.3 < 1 4.7 0.40 0.06 0.73 0.041
Feb 23 23 7.9 5.8 5.5 2.2 6.2 0.47 0.11 0.76 0.062
Mar 20 22 9.9 6.5 5.2 2.1 6.8 0.39 <0.02 0.80 0.038
Apr 22 25 11 5.6 5.8 2.6 7.4 0.43 <0.02 0.57 0.023
May 51 22 7.3 19 5.0 2.3 6.9 0.46 <0.02 0.30 0.030
Jun 19 22 7.5 7.4 4.8 2.3 6.6 1.84 0.03 0.11 0.037
Jul 19 25 12 4.4 5.0 3.0 5.6 0.58 <0.02 0.06 0.028
Aug 25 21 7.3 7.6 4.7 2.2 7.6 0.65 0.02 <0.02 0.029
Sep 20 20 6.1 6.0 4.6 2.0 6.9 0.56 0.08 0.54 0.045
Oct 16 20 10 5.9 4.9 1.8 4.5 0.77 0.48 0.56 0.065
Nov 20 22 9.8 5.2 5.3 2.1 5.3 0.43 0.03 0.59 0.032
Dec 20 24 6.5 6.0 5.6 2.3 5.3 0.33 0.08 0.62 0.035
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.1 5.1 71 3.3 64 98 1.2 <0.2 <2 <10
Feb 2.6 40 87 11 56 564 1.6 <0.2 <2 10
Mar 2.0 9.9 111 7.0 103 242 1.6 <0.2 <2 <10
Apr 2.5 7.1 66 4.0 51 83 2.2 <0.2 <2 <10
May 2.8 2.4 84 4.7 69 64 1.6 <0.2 <2 <10
Jun 2.6 4.2 67 4.2 68 33 1.6 <0.2 2.7 <10
Jul 2.6 0.7 58 3.6 54 <50 1.2 <0.2 <2 <10
Aug 2.6 1.2 78 3.0 66 <50 <2 <0.2 2.7 <10
Sep 3.7 7.5 74 3.4 80 256 2.0 <0.2 <2 <10
Oct 5.3 13 73 3.3 66 512 2.3 <0.2 <2 14
Nov 3.4 5.6 74 2.1 60 123 2.7 <0.2 <2 12
Dec 2.7 4.4 60 3.3 62 145 1.8 <0.2 <2 <10
Appendix C - 15
Table C-3 (continued)
Lake Tillery (Station TYF2, bottom)-2004
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 15 8.8 8.9 5.5 3.5 <1 4.9 0.36 0.04 0.73 0.041
Feb 21 21 8.0 5.5 5.2 2.0 5.9 0.64 0.11 0.77 0.064
Mar 18 22 10 7.2 5.3 2.1 6.9 0.36 0.02 0.78 0.109
Apr 18 22 11 5.3 5.1 2.2 6.6 0.82 0.10 0.71 0.029
May 21 23 7.1 5.2 5.2 2.3 6.7 0.52 0.09 0.47 0.036
Jun 21 24 7.6 5.2 5.8 2.4 6.8 1.09 0.08 0.43 0.022
Jul 20 24 12 4.9 4.9 3.0 5.5 0.69 0.15 0.33 0.059
Aug 28 23 7.2 5.3 5.3 2.3 7.6 0.71 0.11 0.21 0.043
Sep 20 20 6.2 6.5 4.7 2.0 7.0 0.54 0.04 0.54 0.070
Oct 16 20 11 5.6 4.7 1.9 4.4 0.37 0.20 0.55 0.059
Nov 21 23 9.7 5.8 5.6 2.2 5.4 0.40 0.02 0.57 0.033
Dec 22 23 6.4 5.9 5.5 2.3 6.8 0.38 0.07 0.64 0.036
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.1 5.2 70 3.8 68 75 1.3 < 0.2 < 2 <10
Feb 2.6 33 88 8.7 53 580 1.9 <0.2 <2 <10
Mar 2.2 12 105 11 111 490 2.2 < 0.2 < 2 < 10
Apr 2.3 9.1 75 6.2 55 177 1.9 <0.2 <2 <10
May 2.6 12 80 11 74 415 1.8 <0.2 <2 <10
Jun 2.5 19 82 6.1 79 217 2.0 < 0.2 2.1 <10
Jul 2.2 91 103 17 52 197 1.5 <0.2 <2 <10
Aug 2.6 15 100 10 67 500 <2 <0.2 <2 <10
Sep 3.7 11 80 11 80 778 4.0 <0.2 <2 <10
Oct 5.3 23 85 7.5 72 712 2.5 <0.2 <2 12
Nov 3.3 9.0 70 3.9 63 143 2.2 < 0.2 < 2 13
Dec 2.7 8.1 66 3.8 65 166 2.6 <0.2 <2 <10
Appendix C - 16
Table C-3 (continued)
Lake Tillery (Station TYK2, surface)-2004
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Jan 16 8.3 9.3 6.1 3.3 < 1
Feb 19 22 7.9 5.8 5.3 2.0
Mar 20 22 10 6.0 5.3 2.1
Apr 21 24 11 6.3 5.8 2.3
May 22 24 7.2 5.2 5.6 2.3
Jun 20 25 7.6 7.6 6.2 2.4
Jul 22 24 12 9.1 4.9 3.0
Aug 26 20 7.9 6.0 4.6 2.0
Sep 19 19 5.9 5.7 4.4 1.9
Oct 16 19 12 6.0 4.6 1.8
Nov 20 19 9.5 5.9 4.5 1.8
Dec 20 21 6.4 5.6 5.0 2.1
nitrite-N
4.7 0.35 0.07 0.76 0.043
6.2 0.66 0.14 0.80 0.072
7.0 0.84 0.04 0.80 0.041
7.6 0.51 <0.02 0.65 0.028
6.8 0.37 0.07 0.48 0.025
7.2 1.69 0.07 0.44 0.018
5.6 0.67 0.06 0.43 0.02E
7.7 0.57 <0.02 0.28 0.021
6.8 0.59 0.05 0.54 0.044
4.5 0.28 0.74 0.53 0.045
5.1 0.41 < 0.02 0.59 0.031
6.4 0.34 0.07 0.65 0.037
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.1 5.2 70 2.9 66 72 1.3 <0.2 <2 <10
Feb 2.6 40 87 10 65 696 1.9 <0.2 <2 <10
Mar 2.0 12 110 2.6 112 252 3.8 <0.2 <2 <10
Apr 2.2 4.9 78 3.9 60 69 1.9 <0.2 <2 <10
May 2.5 3.3 81 4.4 72 128 1.6 <0.2 <2 <10
Jun 2.4 2.8 76 3.8 75 78 1.8 < 0.2 2.1 <10
Jul 2.6 2.2 64 3.4 54 60 1.6 <0.2 <2 <10
Aug 2.4 0.4 75 1.8 66 208 <2 <0.2 <2 <10
Sep 3.4 6.8 73 3.4 72 289 2.0 <0.2 <2 <10
Oct 4.9 9.1 80 5.2 62 283 2.0 <0.2 <2 11
Nov 3.5 4.7 65 2.4 57 104 2.2 <0.2 <2 12
Dec 2.6 4.2 56 3.7 66 161 1.8 <0.2 <2 <10
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
Appendix C - 17
Table C-4 Concentrations of water chemistry parameters in the Pee Dee River (Stations
TY1B and TY12B) during 2000.1
Pee Dee River below the Tillery Development (Station TY1B, surface)-2000
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 29 20 13 10 4.7 2.0 10 0.81 < 0.05 0.51 0.032
Feb 24 23 13 9.0 5.4 2.2 11 0.83 <0.05 0.58 0.033
Mar 20 23 12 8.0 5.5 2.3 10 0.82 < 0.05 0.56 0.048
Apr 13 24 11 8.0 5.8 2.4 10 0.88 <0.05 0.56 0.038
May 21 22 12 9.4 5.3 2.2 9.0 0.63 < 0.05 0.63 0.040
Jun 21 20 11 7.0 4.7 2.1 8.0 0.89 < 0.05 0.55 0.029
Jul 22 23 12 8.0 5.4 2.4 9.6 0.54 < 0.05 0.32 0.016
Aug 28 22 12 7.0 5.0 2.4 9.6 0.70 < 0.05 0.15 0.018
Sep 31 24 12 7.0 5.4 2.5 10 0.27 <0.05 0.08 0.026
Oct 28 22 12 7.0 4.9 2.4 11 0.83 <0.05 0.14 0.026
Nov 24 19 14 9.0 4.1 2.1 11 0.51 < 0.05 0.21 0.024
Dec 26 21 15 9.0 4.6 2.2 12 0.55 < 0.05 0.24 0.026
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.0 10 64 5.0 74 150 1.5 <0.2 NV <20
Feb 2.8 10 98 <5 77 190 1.4 <0.2 <2 <20
Mar 3.7 7.1 90 <5 77 230 2.0 <0.2 <2 27
Apr 3.4 9.9 96 <5 96 260 2.0 <0.2 <2 <20
May 3.3 11 54 <5 79 160 1.7 <0.2 <2 <20
Jun 3.1 4.4 68 <5 68 <50 1.6 <0.2 <2 <20
Jul 3.0 3.8 36 5.0 53 80 <1.0 <0.2 <2 <20
Aug 2.9 5.1 66 <3 75 <50 1.3 <0.2 <2 <20
Sep 4.0 4.3 68 <3 95 <50 1.4 <0.2 <2 <20
Oct 3.2 6.9 58 <5 70 140 1.6 <0.2 <2 27
Nov 3.7 3.1 76 <5 73 <50 1.4 <0.2 <2 <20
Dec 4.3 4.3 66 <5 80 58 1.6 <0.2 <2 <20
Appendix C - 18
Table C-4 (continued)
Pee Dee River below the Tillery Development (Station TY1213, surface)-2000
Month Total Hardness CF SO4 Ca 2,
Mgz+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 24 37 19 14 8.2 4.0 13 2.7 0.14 1.43 0.471
Feb 15 24 12 8.0 5.1 2.7 6.1 1.2 <0.05 0.58 0.193
Mar 36 33 16 12 7.6 3.4 16 1.0 <0.05 0.66 0.125
Apr 43 39 17 13 9.0 4.0 20 1.3 < 0.05 0.89 0.142
May 29 35 15 13 8.2 3.6 14 1.3 0.08 1.00 0.162
Jun 25 22 8.0 12 5.0 2.4 9.2 0.98 < 0.05 0.59 0.068
Jul 57 30 38 31 8.8 4.3 50 1.4 <0.05 0.66 0.376
Aug 24 26 11 7.0 5.8 2.8 9.6 1.1 < 0.05 0.32 0.128
Sep 10 20 8.0 5.0 4.2 2.2 3.6 1.0 <0.05 0.19 0.246
Oct 31 26 14 10 5.7 2.8 12 1.4 <0.05 0.27 0.072
Nov 28 20 15 9.0 4.3 2.2 12 0.53 < 0.05 0.24 0.056
Dec 32 27 18 13 6.2 2.9 16 0.89 <0.05 0.50 0.096
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 7.9 157 244 125 110 2,100 11 < 0.2 N,V 44
Feb 8.7 46 116 28 76 1,700 5.3 <0.2 <2 42
Mar 4.0 9.0 106 7.0 85 270 2.5 <0.2 <2 <20
Apr 4.8 15 136 12 117 510 3.7 <0.2 <2 <20
May 5.1 43 160 40 111 860 10 <0.2 <2 <20
Jun 3.4 13 78 6.0 80 210 1.8 <0.2 <2 <20
Jul 5.2 8.8 150 <5 168 79 7.6 <0.2 2.0 <20
Aug 7.9 44 102 <3 100 1,200 4.9 <0.2 <2 <20
Sep 19 106 144 59 112 2,600 11 <0.2 3.0 67
Oct 4.1 16 74 9.0 82 360 3.4 <0.2 <2 23
Nov 3.8 5.6 88 <5 85 84 <1.0 <0.2 <2 <20
Dec 4.4 6.4 84 <5 123 140 3.5 <0.2 <2 <20
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
2 No Biological Oxygen Demand (BOD) data were collected during January.
Appendix C - 19
Table C-5 Concentrations of water chemistry parameters in the Pee Dee River (Stations
TY1B and TY12B) and Rocky River (Station RR) during 2001.1
Pee Dee River below Tillery Development (Station TY1B)-2001
Month Total Hardness CT SO4 Ca 2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan ND2 ND ND ND ND ND ND ND ND ND ND
Feb 29 25 14 9.0 6.0 2.5 14 0.80 <0.05 0.48 0.020
Mar 26 26 14 8.8 6.3 2.5 12 1.1 < 0.05 0.62 0.029
Apr 24 25 10 12 6.4 2.2 9.3 1.0 0.11 0.62 0.033
May 25 27 12 12 6.6 2.7 10 0.91 0.34 0.61 0.034
Jun 24 20 9.5 11 4.7 2.1 8.3 0.85 0.15 0.57 0.018
Jul 27 22 8.2 51 5.2 2.1 7.2 0.82 0.12 0.48 0.016
Aug 28 24 9.0 11 6.2 2.2 8.7 0.59 < 0.05 0.26 0.019
Sep 27 25 9.5 13 6.1 2.3 9.8 0.42 0.07 0.07 0.024
Oct 32 27 13 12 6.9 2.3 11 0.57 0.03 0.06 0.034
Nov 29 28 9.9 12 7.2 2.4 11 0.50 0.05 0.13 0.027
Dec 31 29 9.3 12 7.3 2.7 11 0.50 <0.02 0.15 0.028
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan ND ND ND ND ND ND ND ND ND ND
Feb 3.0 4.0 68 <5 39 69 1.1 <0.2 <2 <20
Mar 4.2 6.7 82 <5 82 190 2.1 <0.2 <2 <20
Apr 3.2 4.6 100 4.2 103 84 3.0 <0.2 <2 <10
May 3.1 5.4 94 4.0 73 106 2.0 <0.2 <2 <10
Jun 3.1 2.6 86 1.6 63 115 2.0 <0.2 <2 18
Jul 3.2 1.3 78 1.8 106 <50 2.0 <0.2 <2 38
Aug 2.9 1.7 87 <1 67 <50 1.0 <0.2 <2 11
Sep 4.1 2.8 73 2.0 13 <50 2.0 <0.2 <2 13
Oct 2.7 3.0 87 2.0 79 <50 1.9 <0.2 <2 17
Nov 3.8 5.9 70 4.2 94 91 1.2 < 0.2 < 2 10
Dec 5.4 3.8 96 2.6 94 67 1.9 <0.2 <2 10
Appendix C - 20
Table C-5 (continued)
Pee Dee River below Tillery Development (Station TY12B)-2001
Month Total Hardness CF SO4 Ca 2,
Mgz+ Na TN NH3-N Nitrate+
Jan 33 29 6 10 6.8 3.1
Feb 19 30 6 7.0 6.5 3.4
Mar 27 38 3 14 8.6 4.0
Apr 30 30 3 15 7.6 2.8
May 41 39 3 20 9.2 3.8
Jun 28 24 1 15 5.4 2.5
Jul 27 22 1 11 5.1 2.2
Aug 22 128 3 15 4.8 2.0
Sep 32 25 1 13 6.3 2.3
Oct 43 32 8 26 7.8 3.0
Nov 50 39 9 33 9.6 3.6
Dec 39 36 6 20 8.3 3.7
nitrite-N
13 0.75 0.08 0.32
9.1 0.88 < 0.05 0.23
13 1.8 <0.05 1.21
12 1.2 0.08 0.76
24 0.83 0.22 0.62
12 0.99 0.10 0.59
7.6 0.76 0.14 0.42
7.8 2.0 0.07 1.02
11 0.52 < 0.05 0.08
30 1.1 <0.02 0.62
33 1.3 0.02 0.80
18 1.6 <0.02 0.83
TP
0.068
0.144
0.154
0.072
0.118
0.081
0.026
0.313
0.054
0.204
0.298
0.269
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 5.1 11 97 <5 80 170 1.7 <0.2 <2 <20
Feb 14 40 96 12 <20 780 3.2 <0.2 <2 <20
Mar 4.9 23 98 16 90 690 3.3 <0.2 <2 <20
Apr 3.4 4.2 111 4.6 93 113 4.0 < 0.2 < 2 14
May 4.1 4.0 130 2.6 119 57 3.0 <0.2 <2 <10
Jun 3.6 4.0 108 3.4 69 94 2.0 <0.2 <2 18
Jul 3.1 4.4 85 5.4 95 67 2.0 <0.2 <2 18
Aug 9.1 103 167 51 91 1,950 6.0 <0.2 2.4 26
Sep 3.5 7.5 89 6.4 63 73 1.6 <0.2 <2 <10
Oct 3.3 4.9 150 3.6 143 91 2.3 <0.2 <2 21
Nov 6.3 12 160 7.6 178 264 2.4 < 0.2 < 2 19
Dec 6.6 12 134 7.6 124 194 3.4 <0.2 <2 16
Appendix C - 21
Table C-5 (continued)
Rocky River (Station RR)-2001
Month Total

Alkalinity Hardness

(calculated) CF SO4 Ca 2,
Mgz+
Na
TN
NH3-N
Nitrate+
nitrite-N
TP
Jan N,V ND ND ND ND ND ND ND ND ND ND
Feb 31 48 19 17 11 5.0 15 2.3 0.06 1.62 0.272
Mar 32 51 21 18 12 5.2 16 2.2 0.05 1.63 0.158
Apr 42 50 21 24 12 4.7 20 1.7 0.10 1.17 0.238
May 83 62 53 53 14 6.6 65 1.9 0.09 1.43 0.676
Jun 86 59 57 52 12 6.9 65 3.2 0.12 2.38 0.805
Jul 66 54 42 12 13 5.3 45 2.6 0.17 2.02 0.487
Aug 51 43 47 37 10 4.3 46 3.2 <0.05 2.20 0.582
Sep 75 54 71 77 13 5.4 85 2.4 <0.05 1.52 0.848
Oct 104 62 94 94 14 6.5 111 4.3 <0.02 3.25 1.053
Nov 90 64 69 82 14 7.1 88 6.2 <0.02 5.21 1.120
Dec 57 50 34 48 11 5.4 42 2.0 0.02 1.99 0.788
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan ND ND ND ND ND ND ND ND ND ND
Feb 8.0 33 100 14 132 890 5.3 <0.2 <2 <20
Mar 5.8 22 142 15 121 860 3.4 <0.2 <2 48
Apr 4.6 13 156 12 144 172 4.0 <0.2 <2 15
May 6.8 12 295 24 258 186 7.0 <0.2 <2 21
Jun 6.7 4.5 314 6.6 270 166 6.0 0.21 < 2 26
Jul 5.3 12 243 8.8 258 269 6.0 <0.2 <2 22
Aug 7.4 83 284 48 204 1,670 6.0 <0.2 <2 26
Sep 6.4 12 327 5.4 319 264 6.8 <0.2 <2 17
Oct 6.3 4.7 436 4.1 420 99 5.9 <0.2 <2 23
Nov 9.9 17 361 18 365 597 6.5 <0.2 <2 30
Dec 8.4 17 243 14 228 380 5.5 <0.2 <2 20
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
2 No data were collected in January.
Appendix C - 22
Table C-6 Concentrations of water chemistry parameters in the Pee Dee River (Stations
TY1B and TY12B) and Rocky River (Station RR) during 2002.1
Pee Dee River below Tillery Development (Station TY1B)-2002
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 31 25 12 12 6.3 2.1 13 0.34 0.03 0.27 0.021
Feb 29 24 16 12 6.2 2.2 11 0.43 <0.02 0.06 0.040
Mar 26 27 15 11 6.8 2.4 11 0.76 <0.02 0.58 0.150
Apr 20 26 14 12 5.9 2.7 9.3 1.13 0.07 0.58 0.034
May 18 36 10 12 8.8 3.4 9.8 0.45 < 0.02 0.44 0.020
Jun 25 40 13 12 9.8 3.8 9.1 0.54 0.04 0.40 0.021
Jul 22 35 11 9.6 7.2 4.2 10 0.18 0.04 0.34 0.020
Aug 35 16 9.6 9.4 3.8 1.5 11 0.80 0.29 <0.02 0.062
Sep 26 10 10 10 2.1 1.2 8.5 0.41 0.10 0.19 0.020
Oct 23 8.1 12 15 1.6 < 1.0 9.6 0.46 0.04 0.22 0.026
Nov 24 19 11 14 4.0 2.2 11 0.43 0.02 0.37 0.026
Dec 17 23 7.1 16 5.2 2.5 6.3 0.96 0.08 0.58 0.057
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 4.6 2.7 79 1.8 84 77 1.9 <0.2 <2 10
Feb 3.6 27 85 29 86 235 1.8 <0.2 <2 17
Mar 2.2 8.1 84 14 111 189 2.3 <0.2 <2 15
Apr 2.6 8.8 80 7.0 92 174 1.8 <0.2 <2 17
May 3.2 3.8 78 4.6 45 52 1.8 <0.2 <2 <10
Jun 3.2 3.1 98 3.4 80 100 1.4 <0.2 <2 10
Jul 2.6 1.4 83 <1.0 75 398 2.5 <0.2 <2 <10
Aug 3.0 3.5 78 1.8 129 <50 1.4 <0.2 <2 <10
Sep 4.6 3.0 83 3.2 72 155 1.3 <0.2 <2 26
Oct 4.5 5.6 77 3.0 68 687 2.0 < 0.2 < 2 15
Nov 3.9 4.7 72 4.4 80 312 1.8 <0.2 <2 16
Dec 4.6 25 101 11 63 234 2.4 <0.2 <2 22
Appendix C - 23
Table C-6 (continued)
Pee Dee River below Tillery Development (Station TY12B)-2002
Month Total Hardness CF SO4 Ca2+ Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 32 26 13 13 6.7 2.2 14 <0.10 0.05 0.27 0.034
Feb 28 28 16 12 6.9 2.7 12 0.62 <0.02 0.07 0.110
Mar 29 36 20 20 8.9 3.3 14 0.63 <0.02 0.73 0.042
Apr 24 30 16 13 6.5 3.4 10 1.05 0.03 0.49 0.125
May 20 40 13 14 9.7 3.9 12 0.48 0.03 0.54 0.088
Jun 31 38 20 16 9.1 3.8 13 0.45 0.02 0.62 0.143
Jul 51 54 48 46 9.4 7.4 55 0.55 <0.02 0.63 0.438
Aug 29 15 9.9 11 3.4 1.5 11 0.45 0.04 0.06 0.094
Sep 32 12 16 16 2.6 1.4 14 0.37 0.06 0.30 0.155
Oct 24 10 13 14 2.2 1.1 11 0.64 0.05 0.37 0.077
Nov 24 31 13 16 7.5 2.9 10 0.72 0.03 0.63 0.179
Dec 11 21 9.4 18 4.3 2.5 4.9 2.33 0.03 0.42 0.119
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 4.6 5.0 84 4.8 77 122 2.4 <0.2 <2 12
Feb 3.4 17 146 50 93 1,450 4.7 <0.2 <2 18
Mar 4.2 25 123 26 146 497 3.8 <0.2 <2 18
Apr 4.8 28 106 18 94 488 2.8 <0.2 <2 24
May 3.3 19 86 14 55 320 2.7 <0.2 2.6 <10
Jun 3.7 12 122 12 103 285 1.8 <0.2 <2 10
Jul 4.5 6.7 233 4.6 209 170 4.2 <0.2 2.1 17
Aug 3.0 9.7 74 7.2 119 234 1.6 <0.2 <2 14
Sep 4.4 18 141 20 98 908 2.2 <0.2 <2 24
Oct 5.0 23 91 4.8 71 338 2.4 <0.2 <2 17
Nov 6.0 54 120 31 105 842 4.8 <0.2 <2 29
Dec 16 40 120 20 102 456 4.6 <0.2 2.4 50
Appendix C - 24
Table C-6 (continued)
Rocky River (Station RR)-2002
Month Total Hardness CF SO4 Ca2+ Mgz+ Na TN NH3-N Nitrate+ TP
Jan 55 53 35 49 13 5.2
Feb 39 52 26 32 12 5.3
Mar 47 57 33 31 14 5.6
Apr 42 50 32 30 12 5.3
May 56 76 70 55 19 7.0
Jun 62 61 46 41 16 5.2
Jul 98 84 123 115 13 12
Aug 56 37 41 50 5.4 5.7
Sep 53 32 39 57 4.8 4.9
Oct 24 36 36 35 5.3 5.6
Nov 32 68 15 20 17 6.2
Dec 23 34 13 22 7.7 3.7
nitrite-N
39 0.96 0.32 1.85 0.510
21 0.48 < 0.02 0.41 0.335
28 1.01 0.13 2.04 0.489
26 1.91 <0.02 1.52 0.309
68 0.77 0.04 2.18 0.924
48 0.75 0.04 2.01 1.05
151 0.92 0.06 1.57 1.41
49 0.87 0.05 1.42 1.21
42 0.62 0.04 2.11 0.632
28 0.76 <0.02 2.49 0.383
10 1.34 0.05 5.36 0.419
8.7 1.66 0.02 2.22 0.173
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 8.5 6.0 211 1.2 209 133 4.8 <0.2 <2 21
Feb 4.3 9.3 152 6.2 160 180 3.9 <0.2 <2 20
Mar 3.7 100 253 82 176 2,424 7.7 <0.2 <2 23
Apr 3.8 14 179 13 174 213 3.6 <0.2 <2 20
May 7.1 22 278 5.0 254 152 6.0 <0.2 2.4 15
Jun 6.5 8.9 255 13 229 255 4.5 <0.2 <2 17
Jul 8.2 10 552 6.2 499 454 9.0 <0.2 <2 30
Aug 7.5 9.0 220 6.7 293 303 4.6 <0.2 <2 38
Sep 6.7 10 229 3.5 218 549 4.8 <0.2 <2 36
Oct 5.7 11 199 21 182 956 4.7 <0.2 <2 21
Nov 12 94 172 52 176 168 10 <0.2 3.9 44
Dec 4.7 22 142 11 117 96 3.4 <0.2 <2 20
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
Appendix C - 25
Table C-7 Concentrations of water chemistry parameters in the Pee Dee River (Stations
TY1B and TY12B) and Rocky River (RR) below the Tillery Hydroelectric
Plant during 2004.1
Pee Dee River below Tillery Development
(Station TY1B, No Generation Flow)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 18 8.4 9.2 6.4 3.4 < 1 4.9 0.33 0.06 0.73 0.034
Feb 25 24 7.7 5.2 5.9 2.2 6.8 0.38 0.06 0.82 0.041
Mar 17 22 11 5.2 5.2 2.1 6.6 1.14 0.06 0.83 0.036
Apr 19 21 11 6.5 4.5 2.3 6.8 0.42 0.04 0.69 0.024
May 21 23 7.8 5.2 5.4 2.4 7.0 0.32 <0.02 0.47 0.025
Jun 22 24 7.6 7.9 5.6 2.3 6.4 1.39 0.09 0.46 0.015
Jul 21 25 12 2.8 5.1 3.0 5.6 0.48 0.04 0.43 0.017
Aug 27 21 6.7 6.2 5.0 2.2 7.2 0.62 <0.02 0.26 0.024
Sep 23 22 6.9 6.0 5.1 2.1 8.4 0.59 0.06 0.49 0.041
Oct 18 19 10 5.3 4.6 1.8 4.3 0.36 <0.02 0.49 0.058
Nov 16 24 11 8.9 5.8 2.2 5.3 0.46 < 0.02 0.55 0.030
Dec 20 20 8.9 6.2 4.5 2.1 6.1 0.51 0.06 0.58 0.038
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.1 2.2 69 2.7 74 97 1.6 <0.2 <2 <10
Feb 2.1 11 82 4.5 56 156 1.2 <0.2 <2 <10
Mar 2.3 18 104 5.2 108 326 2.0 <0.2 <2 <10
Apr 2.2 7.9 107 3.9 89 134 1.6 <0.2 <2 <10
May 2.4 9.1 100 8.1 74 222 2.0 < 0.2 < 2 < 10
Jun 2.4 2.7 72 2.4 76 88 2.8 <0.2 <2 <10
Jul 2.5 0.6 64 1.8 51 <50 1.4 <0.2 <2 <10
Aug 2.6 1.3 74 2.3 70 105 <2 <0.2 <2 <10
Sep 3.2 4.2 76 3.0 76 143 2.0 <0.2 <2 <10
Oct 4.4 14 72 5.0 66 485 3.0 <0.2 <2 12
Nov 3.5 5.0 74 2.0 66 96 2.8 <0.2 <2 14
Dec 2.7 7.1 75 5.6 66 224 5.7 <0.2 <2 <10
Appendix C - 26
Table C-7 (continued)
Pee Dee River below Tillery Development
(Station TY1B, Generation Flow)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 19 8.2 9.1 6.5 3.3 < 1 4.8 0.33 0.13 0.72 0.039
Feb 22 24 7.8 5.8 6.0 2.3 6.8 0.35 0.06 0.80 0.047
Mar 19 21 9.2 5.3 5.1 2.0 6.2 2.87 <0.02 0.76 0.035
Apr 21 24 11 5.0 5.5 2.4 7.1 0.75 < 0.02 0.63 0.044
May 21 24 7.6 5.1 5.4 2.5 7.2 0.35 0.04 0.46 0.022
Jun 19 22 7.5 <2 5.1 2.2 6.2 2.45 0.09 0.38 0.015
Jul 20 27 12 7.4 6.0 2.9 5.3 0.61 0.13 0.32 0.020
Aug 26 22 7.0 7.5 5.0 2.2 7.4 0.53 < 0.02 0.20 0.029
Sep 23 22 7.1 6.0 5.2 2.1 8.7 0.73 0.07 0.43 0.038
Oct 18 24 11 5.3 6.4 2.0 6.1 0.40 0.09 0.44 0.049
Nov 17 19 8.9 5.9 4.6 1.8 4.4 0.45 <0.02 0.56 0.033
Dec 23 20 9.2 5.7 4.8 2.1 5.8 0.87 0.08 0.64 0.043
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.1 6.5 83 16 68 240 1.8 < 0.2 < 2 10
Feb 2.2 18 117 7.5 52 252 1.5 <0.2 <2 <10
Mar 2.3 15 100 14 108 347 2.0 <0.2 <2 <10
Apr 2.5 11 84 25 62 336 2.2 <0.2 <2 <10
May 3.0 9.4 91 18 68 600 2.0 <0.2 <2 <10
Jun 2.6 4.7 71 4.4 69 51 2.0 < 0.2 < 2 <10
Jul 2.5 1.5 58 6.9 60 363 1.8 <0.2 <2 <10
Aug 2.6 3.0 76 3.4 62 143 < 2 < 0.2 < 2 <10
Sep 3.2 5.3 72 3.1 80 148 2 <0.2 <2 <10
Oct 4.8 24 76 6.4 64 404 2.4 < 0.2 < 2 <10
Nov 3.0 8.5 74 16 55 213 3.3 <0.2 <2 12
Dec 2.8 8.9 50 7.4 82 400 2.3 <0.2 <2 <10
Appendix C - 27
Table C-7 (continued)
Pee Dee River below Tillery Development
(Station TY12131 No Generation Flow)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 16 21 15 16 5.7 1.5 9.1 0.44 < 0.02 1.24 0.276
Feb 21 27 12 9.2 6.1 2.8 7.2 0.53 0.04 0.68 0.089
Mar 24 30 14 9.0 7.0 3.1 9.0 0.75 0.04 0.72 0.086
Apr 32 37 15 8.5 7.8 4.3 8.1 0.57 0.04 0.96 0.120
May 24 26 8.6 5.4 6.0 2.8 8.5 0.36 0.03 0.59 0.056
Jun 24 28 9.9 7.0 6.3 3.0 9.1 1.81 0.08 0.68 0.115
Jul 26 28 13 4.8 6.1 3.1 6.3 0.53 0.05 0.43 0.061
Aug 28 24 8.0 6.1 5.4 2.6 8.6 0.58 <0.02 0.30 0.071
Sep 24 27 7.8 13 6.0 2.8 8.0 0.57 <0.02 0.53 0.117
Oct 22 24 11 5.5 5.6 2.4 5.8 0.54 0.09 0.46 0.066
Nov 26 36 14 12 8.9 3.4 8.6 0.49 <0.02 0.96 0.097
Dec 29 31 11 8.5 6.8 3.4 7.7 0.43 0.05 0.59 0.077
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.0 27 117 8.6 101 197 2.7 < 0.2 < 2 11
Feb 5.8 30 150 15 58 637 2.7 <0.2 <2 18
Mar 4.8 18 106 10 107 348 2.5 <0.2 <2 <10
Apr 3.9 17 122 8.6 92 231 2.4 <0.2 <2 <10
May 3.5 16 100 14 86 445 2.2 <0.2 <2 <10
Jun 3.2 21 112 12 84 871 4.0 <0.2 <2 <10
Jul 2.8 14 74 10 54 213 2.0 <0.2 <2 <10
Aug 3.1 21 103 22 75 635 3.0 <0.2 <2 <10
Sep 6.7 17 102 11 88 451 3.0 <0.2 <2 18
Oct 5.8 9.1 82 8.0 80 419 2.3 <0.2 <2 12
Nov 4.0 9.4 102 4.8 98 126 3.3 <0.2 <2 14
Dec 5.5 13 64 6.3 92 378 3.0 <0.2 <2 14
Appendix C - 28
Table C-7 (continued)
Pee Dee River below Tillery Development
(Station TY12B, Generation Flow)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 14 9.0 9.7 7.5 3.6 < 1 5.4 0.34 0.02 0.81 0.052
Feb 24 35 13 11 7.8 3.7 9.5 0.46 <0.02 1.16 0.127
Mar 17 23 9.0 5.7 5.5 2.3 6.8 0.71 0.03 0.73 0.051
Apr 21 23 11 5.3 5.4 2.4 7.1 0.58 <0.02 0.64 0.038
May 23 26 8.6 5.2 6.0 2.8 8.0 0.42 0.04 0.46 0.071
Jun 22 29 10 8.5 6.7 2.9 9.4 1.98 0.06 0.72 0.122
Jul 17 28 13 26 5.9 3.1 5.8 0.59 0.03 0.39 0.064
Aug 33 35 11 16 7.6 3.9 1.3 0.71 <0.02 0.78 0.177
Sep 27 31 9.2 8.7 7.0 3.2 8.6 0.57 <0.02 0.98 0.197
Oct 16 21 12 7.3 5.1 1.9 5.2 0.64 0.05 0.52 0.060
Nov 22 23 10 7.6 5.6 2.1 5.3 0.47 <0.02 0.71 0.058
Dec 27 27 11 8.6 6.2 2.7 6.9 0.45 0.03 0.97 0.077
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.2 7.2 77 4.3 67 122 1.5 <0.2 <2 11
Feb 5.8 30 86 22 107 749 3.4 <0.2 <2 18
Mar 2.4 17 106 3.9 109 512 2.5 <0.2 <2 <10
Apr 2.5 9.0 72 5.2 62 216 2.0 <0.2 <2 <10
May 5.3 15 99 18 80 517 2.5 <0.2 <2 14
Jun 3.0 29 118 19 86 626 3.5 <0.2 <2 <10
Jul 2.6 26 77 18 64 415 2.3 < 0.2 < 2 < 10
Aug 4.7 16 141 24 93 699 4.0 < 0.2 < 2 < 10
Sep 5.3 45 138 46 104 1,260 5.0 <0.2 <2 <10
Oct 4.9 15 85 14 76 639 2.6 <0.2 <2 13
Nov 3.5 10 74 5.3 66 226 2.5 <0.2 <2 14
Dec 3.2 12 82 10 104 354 2.2 <0.2 <2 <10
Appendix C - 29
Table C-7 (continued)
Rocky River (Station RR, surface)-2004
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Jan 15 31 22 25 8.7 2.2
Feb 22 47 17 16 11 5.0
Mar 19 49 10 16 12 4.8
Apr 40 50 19 16 12 4.9
May 51 53 21 17 12 5.8
Jun 38 48 21 22 12 4.6
Jul 30 90 70 7.4 24 7.2
Aug 40 43 14 18 9.7 4.6
Sep 30 34 11 13 9.9 2.2
Oct 35 53 11 15 13 5.3
Nov 50 66 22 19 16 6.1
Dec 30 40 14 14 8.6 4.6
nitrite-N
16 0.48 <0.02 2.50 0.113
12 0.60 0.02 2.82 0.221
15 0.62 <0.02 1.68 0.207
12 0.65 0.02 1.31 0.223
21 0.63 0.05 2.44 0.43S
17 2.40 0.07 1.85 0.47S
44 1.25 0.06 9.37 1.09
15 0.69 <0.02 1.30 0.201
9.4 0.78 <0.02 1.50 0.258
14 0.31 <0.02 1.68 0.197
15 0.51 < 0.02 4.17 0.227
7.8 0.80 0.03 1.12 0.192
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.6 3.2 159 1.3 137 96 4.4 <0.2 <2 <10
Feb 4.4 20 117 16 108 311 3.9 <0.2 <2 16
Mar 3.3 17 112 5.2 120 293 3.2 <0.2 <2 10
Apr 4.7 16 148 12 115 305 3.9 <0.2 <2 <10
May 5.6 17 206 24 158 633 4.6 <0.2 <2 12
Jun 4.7 73 194 46 124 1,580 6.5 <0.2 <2 <10
Jul 6.8 21 300 23 286 617 5.9 <0.2 <2 18
Aug 5.5 8.6 151 10 113 647 5.0 < 0.2 < 2 <10
Sep 6.7 28 138 16 125 950 7.0 <0.2 <2 19
Oct 5.0 9.4 139 16 134 524 3.8 <0.2 <2 11
Nov 3.7 26 164 8.5 165 400 3.6 <0.2 <2 11
Dec 5.0 55 156 41 119 2,080 5.7 <0.2 <2 21
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
Appendix C - 30
APPENDIX D
RAW DATA LISTING FOR WATER CHEMISTRY PARAMETERS
COLLECTED IN BLEWETT FALLS LAKE AND THE PEE DEE RIVER
DURING 1999, 2001, AND 2004
Table D-1 Concentrations of water chemistry parameters in Blewett Falls Lake
(Stations BFB2, BFF2, and BFH2) during 1999.1
Blewett Falls Lake (Station BFB2, surface) -1999
Month Total Hardness CT SO4 Ca 2, Mg2+
Na
TN
NH3-N
Nitrate+
Alkalinity (calculated) nitrite-N
Jan 26 22 11 5.0 5.5 2.1 14 0.71 0.15 0.35
Feb 23 24 9.0 5.0 5.6 2.5 10 0.97 <0.05 0.58
Mar 26 24 11 7.0 6.0 2.2 15 0.99 <0.05 0.57
Apr 23 24 10 9.0 5.8 2.4 13 0.84 <0.05 0.38
May 23 23 11 11 5.5 2.3 12 0.98 0.07 0.31
Jun 30 27 11 10 6.3 2.8 16 0.91 <0.05 0.10
Jul 24 26 10 7.0 5.9 2.7 15 0.36 0.24 0.14
Aug 28 23 9.0 7.0 4.9 2.6 14 0.55 <0.05 <0.02
Sep 36 22 12 8.9 4.5 2.5 15 0.32 <0.05 <0.02
Oct 28 21 11 9.0 4.6 2.4 11 0.50 0.09 0.34
Nov 31 19 14 11 5.3 2.6 14 0.79 <0.05 0.38
Dec 41 33 18 14 7.2 3.6 20 1.3 0.18 0.69
Month TP TOC Turbidity TS TSS TDS Al Cu Hg COD
Jan 0.057 4.7 23 87 4.0 62 350 6.9 <0.2 <20
Feb 0.068 4.1 28 92 9.0 88 620 3.4 <0.2 <20
Mar 0.079 3.9 32 112 11 86 380 7.5 <0.2 <20
Apr 0.054 3.4 8.8 89 6.5 80 220 2.4 <0.2 <20
May 0.055 3.4 3.5 77 3.3 79 <50 <1.0 <0.2 <20
Jun 0.048 4.1 5.3 85 3.0 168 120 2.1 <0.2 <20
Jul 0.073 3.3 23 99 14 86 340 2.2 <0.2 <20
Aug 0.042 3.6 3.2 88 <3 85 <50 <1.0 <0.2 <20
Sep 0.059 3.9 5.6 88 4.4 94 <50 7.5 <0.2 <20
Oct 0.076 4.9 28 94 16 78 670 <1.0 <0.2 <20
Nov 0.050 5.1 11 88 10 113 200 4.4 <0.2 <20
Dec 0.169 6.5 20 82 8.0 109 370 3.4 <0.2 20
Appendix D - 1
Table D-1 (continued)
Blewett Falls Lake (Station BFF2, surface)-1999
Month Total
Alkalinity Hardness
(calculated) CF
Jan 28 24 12
Feb 24 24 11
Mar 23 21 9.0
Apr 14 25 11
May 27 20 11
Jun 24 24 10
Jul 33 28 13
Aug 20 22 9.0
Sep 49 27 22
Oct 23 21 11
Nov 33 28 16
Dec 25 22 13
SO4- Ca2+ Mgz+ Na

7.0 5.9 2.3 15
7.0 5.7 2.3 11
5.0 5.2 2.0 9.8
11 5.9 2.4 14
11 4.7 2.0 9.8
11 5.6 2.5 13
8.0 6.3 3.0 18
6.0 4.8 2.5 14
17 5.5 3.2 29
7.0 4.4 2.4 11
15 6.2 3.0 19
9.0 4.7 2.4 13
TN NH3-N Nitrate +
nitrite-N
0.81 <0.05 0.47
0.93 <0.05 0.50
0.75 < 0.05 0.49
0.84 < 0.05 0.42
0.91 <0.05 0.38
1.0 < 0.05 0.28
0.94 0.11 0.54
0.70 <0.05 <0.02
0.71 0.06 0.36
0.54 <0.05 0.31
0.82 <0.05 0.42
0.81 0.16 0.32
Month TP TOC Turbidity TS TSS TDS Al Cu Hg COD
Jan 0.071 4.5 23 91 5.0 78 330 9.9 <0.2 <20
Feb 0.073 4.7 24 94 7.5 92 280 5.2 <0.2 <20
Mar 0.052 3.5 21 86 6.3 81 510 5.1 <0.2 <20
Apr 0.077 3.9 12 96 12 89 180 7.4 <0.2 <20
May 0.077 3.5 17 87 10 74 170 < 1.0 < 0.2 < 20
Jun 0.075 3.5 13 87 9.8 72 190 < 1.0 < 0.2 <20
Jul 0.111 3.3 16 107 9.3 94 330 2.1 <0.2 21
Aug 0.056 3.7 9.6 94 9.3 79 140 2.1 <0.2 <20
Sep 0.225 5.4 10 142 8.4 133 180 9.2 <0.2 <20
Oct 0.063 4.2 26 92 27 87 900 1.1 <0.2 <20
Nov 0.096 4.7 10 104 6.0 137 160 2.7 <0.2 <20
Dec 0.054 2.7 20 72 6.0 74 320 1.8 <0.2 20
Appendix D - 2
Table D-1 (continued)
Blewett Falls Lake (Station BFH2, surface)-1999
Month Total Hardness CF SO4 Ca 2,
Mg2+
Na
TN
NH3-N
Nitrate+
Alkalinity (calculated) nitrite-N
Jan 28 28 12 6.0 6.5 2.8 14 0.92 < 0.05 0.48
Feb 24 24 10 7.0 5.6 2.3 11 0.93 <0.05 0.58
Mar 30 29 13 9.0 7.0 2.8 16 0.96 <0.05 0.53
Apr 14 22 10 8.0 5.3 2.1 12 0.92 <0.05 0.58
May 27 21 11 10 4.9 2.1 11 0.93 <0.05 0.46
Jun 26 25 11 12 5.8 2.6 15 1.0 0.09 0.54
Jul 24 24 8.0 6.0 5.3 2.5 12 0.79 < 0.05 0.44
Aug 32 24 13 10 5.3 2.8 20 0.56 <0.05 0.18
Sep 36 25 18 14 5.2 2.8 24 0.59 <0.05 0.30
Oct 26 20 10 6.0 4.4 2.3 11 0.50 <0.05 0.26
Nov 33 22 13 11 4.9 2.4 14 0.55 <0.05 0.27
Dec 31 20 12 9.0 4.3 2.2 12 0.71 0.11 0.28
Month TP TOC Turbidity TS TSS TDS Al Cu Hg COD
Jan 0.092 4.4 27 98 15 86 1,100 5.8 <0.2 <20
Feb 0.064 4.1 20 91 3.5 88 230 7.9 <0.2 <20
Mar 0.086 3.7 12 105 3.7 99 300 14 <0.2 <20
Apr 0.044 3.0 9.9 83 4.8 76 150 7.6 <0.2 <20
May 0.041 3.3 7.8 74 5.5 75 120 3.4 <0.2 <20
Jun 0.070 3.4 11 93 7.2 80 260 <1.0 <0.2 <20
Jul 0.054 2.9 7.0 73 5.3 72 210 1.6 <0.2 <20
Aug 0.124 3.6 7.6 117 9.7 111 170 <1.0 <0.2 <20
Sep 0.150 4.1 9.0 114 7.2 100 130 8.0 <0.2 <20
Oct 0.046 4.5 13 66 <5 76 220 <1.0 <0.2 <20
Nov 0.047 4.4 7.4 80 9.0 103 140 1.7 <0.2 <20
Dec 0.031 2.7 9.6 52 8.0 70 140 1.4 <0.2 <20
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
Appendix D - 3
Table D-2 Concentrations of water chemistry parameters in Blewett Falls Lake
(Stations BFB2, BFF2, and BFH2) during 2001.1
Blewett Falls Lake (Station BFB2, surface)-2001
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 33 26 11 10 6.0 2.6 13 0.91 0.08 0.50 0.067
Feb 32 35 19 14 8.0 3.6 18 1.6 <0.05 0.95 0.223
Mar 22 29 13 9.7 6.6 3.0 9.8 1.6 <0.05 0.75 0.162
Apr 28 29 12 15 7.3 2.7 11 1.2 0.07 0.71 0.086
May 33 35 18 18 8.4 3.3 15 0.74 0.25 0.21 0.091
Jun 30 25 13 14 5.7 2.6 12 1.1 0.13 0.24 0.072
Jul 31 28 10 14 6.9 2.6 9.8 0.72 0.07 0.09 0.060
Aug 36 27 15 14 6.7 2.5 17 0.83 <0.05 0.14 0.090
Sep 34 28 12 13 6.8 2.6 14 0.69 0.11 0.09 0.076
Oct 40 31 26 22 7.2 3.1 24 1.1 0.03 0.34 0.118
Nov 46 35 25 20 8.4 3.5 26 0.90 <0.02 0.08 0.084
Dec 37 31 14 16 7.4 3.1 17 0.87 0.12 0.26 0.094
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 4.0 6.7 89 <5 73 95 1.6 <0.2 <2 <20
Feb 8.1 25 106 13 106 400 4.1 <0.2 <2 <20
Mar 7.5 52 90 21 88 1,000 4.3 <0.2 <2 33
Apr 3.6 13 121 7.8 86 177 3.0 <0.2 <2 14
May 5.3 4.2 108 3.0 84 <50 2.0 <0.2 3.5 <10
Jun 4.8 2.8 118 4.2 76 87 2.0 <0.2 4.2 20
Jul 5.4 4.7 86 3.6 104 <50 2.0 <0.2 2.7 26
Aug 4.4 7.2 114 6.2 94 157 2.0 < 0.2 2.3 <10
Sep 4.2 14 90 9.0 78 230 1.9 <0.2 <2 10
Oct 3.4 16 147 15 108 336 2.5 <0.2 <2 22
Nov 5.7 6.0 114 7.5 138 51 2.1 <0.2 4.0 24
Dec 6.3 13 110 9.6 108 182 2.9 <0.2 <2 13
Appendix D - 4
Table D-2 (continued)
Blewett Falls Lake (Station BFF2, surface)-2001
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 33 30 15 <2 7.0 3.0 16 1.1 0.10 0.66 0.079
Feb 28 30 14 9.0 7.1 3.0 13 1.2 <0.05 0.66 0.126
Mar 26 31 14 11 7.1 3.1 12 1.4 <0.05 0.86 0.126
Apr 27 28 9.8 12 7.1 2.4 2.4 0.95 0.07 0.62 0.078
May 32 31 15 16 7.6 3.0 13 0.91 0.10 0.27 0.065
Jun 30 24 11 10 5.3 2.5 11 1.2 0.11 0.10 0.100
Jul 31 26 9.8 12 6.3 2.5 9.2 1.0 0.07 0.17 0.096
Aug 31 21 11 11 5.2 2.0 9.2 0.84 <0.05 0.16 0.098
Sep 32 26 10 11 6.6 2.4 11 0.55 <0.05 0.04 0.058
Oct 39 33 20 18 8.0 3.1 18 0.82 <0.02 0.22 0.146
Nov 44 34 24 23 8.3 3.3 25 1.1 <0.02 0.40 0.136
Dec 36 34 15 16 8.0 3.5 17 1.6 0.05 0.94 0.265
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.8 12 93 5.7 77 230 1.8 <0.2 <2 <20
Feb 6.3 39 80 13 83 540 2.9 <0.2 <2 <20
Mar 4.7 38 92 28 87 860 3.5 <0.2 <2 24
Apr 3.3 15 87 6.4 97 118 3.0 <0.2 <2 10
May 4.6 5.3 97 3.8 83 <50 2.0 <0.2 2.3 13
Jun 5.5 4.3 107 5.0 75 <50 2.0 <0.2 4.0 18
Jul 4.5 8.9 90 9.0 113 113 3.0 <0.2 2.7 31
Aug 4.0 13 106 9.4 78 153 1.0 <0.2 3.0 20
Sep 3.8 9.0 84 7.0 73 141 1.8 <0.2 <2 13
Oct 3.3 18 134 15 114 350 2.5 <0.2 2.7 23
Nov 5.3 11 116 9.2 129 269 2.2 <0.2 <2 18
Dec 6.6 20 133 12 121 292 2.7 <0.2 <2 14
Appendix D - 5
Table D-2 (continued)
Blewett Falls Lake (Station BFH2, surface)-2001
Month Total
Alkalinity Hardness
(calculated) CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+
nitrite-N TP
Jan 62 57 34 28 13 5.9 37 2.9 0.09 2.24 0.395
Feb 28 34 16 11 7.9 3.5 13 1.7 <0.05 1.05 0.170
Mar 25 27 14 9.6 6.3 2.7 12 1.1 <0.05 0.66 0.051
Apr 29 30 12 15 7.5 2.7 11 1.1 0.09 0.73 0.040
May 23 28 13 12 6.8 2.8 11 0.87 0.34 0.48 0.058
Jun 31 24 14 16 5.4 2.6 13 1.1 0.10 0.67 0.156
Jul 33 28 12 15 6.8 2.7 12 0.90 0.07 0.60 0.102
Aug 29 23 11 11 5.6 2.1 11 0.82 < 0.05 0.42 0.100
Sep 31 26 9.9 9.3 6.4 2.3 10 0.51 <0.05 <0.02 0.044
Oct 42 31 21 20 7.5 2.9 21 0.88 <0.02 0.39 0.142
Nov 52 38 32 33 9.2 3.6 34 1.5 0.02 0.97 0.278
Dec 32 28 10 12 6.8 2.6 11 0.64 <0.02 0.20 0.081
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 6.3 11 188 <5 M 220 4.4 <0.2 <2 <20
Feb 6.9 42 102 15 9 690 3.5 <0.2 <2 <20
Mar 3.3 10 64 8.0 9 210 2.5 <0.2 <2 <20
Apr 3.8 6.2 117 9.6 6 169 4.0 <0.2 <2 14
May 4.1 8.3 97 5.8 4 84 3.0 <0.2 <2 11
Jun 4.4 5.2 125 7.0 9 115 2.0 < 0.2 2.0 20
Jul 3.6 7.5 101 7.8 M 135 3.0 <0.2 <2 20
Aug 4.7 11 106 6.8 7 193 2.0 < 0.2 < 2 13
Sep 3.8 5.6 73 4.4 0 68 1.4 <0.2 <2 12
Oct 2.9 4.9 132 3.5 S 74 2.2 <0.2 <2 19
Nov 6.6 9.5 146 8.4 2 222 5.1 < 0.2 2.0 17
Dec 5.3 11 96 9.6 0 152 1.7 <0.2 <2 25
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
Appendix D - 6
Table D-3 Concentrations of water chemistry parameters in Blewett Falls Lake
(Stations BFB2, BFF2, and BFH2) during 2004.1
Blewett Falls Lake (Station BFB2, surface)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 20 4.5 12 6.8 1.8 <1 5.2 0.37 <0.02 0.78 0.052
Feb 23 24 8.6 9.7 5.8 2.4 6.6 0.42 0.03 0.86 0.064
Mar 20 25 11 7.9 5.9 2.4 7.3 0.46 < 0.02 0.73 0.060
Apr 22 25 12 5.9 5.9 2.6 7.9 0.65 < 0.02 0.67 0.051
May 24 26 8.0 5.6 6.0 2.7 8.1 0.62 < 0.02 0.26 0.052
Jun 23 26 8.7 5.6 6.1 2.5 8.6 0.69 < 0.02 0.27 0.073
Jul 23 21 13 8.8 4.2 2.6 4.8 0.69 < 0.02 0.10 0.037
Aug 26 22 7.5 6.5 5.0 2.3 7.1 0.80 0.11 <0.02 0.066
Sep 24 26 7.7 7.0 6.1 2.5 8.5 0.58 <0.02 0.57 0.086
Oct 21 24 11 5.1 5.8 2.2 6.0 0.67 <0.02 0.53 0.077
Nov 26 27 12 7.5 6.5 2.6 6.7 0.43 0.04 0.74 0.054
Dec 22 24 6.8 6.3 6.0 2.2 6.5 0.41 0.07 0.58 0.066
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.2 10 76 8.8 61 194 1.5 < 0.2 < 2 < 10
Feb 2.7 18 81 9.3 118 195 1.6 <0.2 <2 10
Mar 2.6 17 121 9.0 105 335 2.3 <0.2 <2 <10
Apr 2.4 20 112 16 51 282 1.9 <0.2 <2 10
May 3.7 0.5 73 8.0 65 146 1.8 < 0.2 3.4 14
Jun 2.9 12 84 7.2 68 232 5.3 <0.2 2.2 <10
Jul 2.9 1.1 76 3.3 64 90 1.3 < 0.2 2.5 < 10
Aug 3.8 3.1 73 4.8 58 200 2.0 <0.2 3.2 <10
Sep 4.0 14 100 14 92 385 3.0 <0.2 <2 <10
Oct 4.6 18 96 13 64 401 4.4 < 0.2 < 2 13
Nov 3.6 14 107 18 76 721 4.3 < 0.2 < 2 12
Dec 3.1 19 78 16 66 305 2.2 <0.2 <2 <10
Appendix D - 7
Table D-3 (continued)
Blewett Falls Lake (Station BFB2, bottom)-2004
Month Total Hardness CF SO4 Ca 2,
Me+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 19 4.4 11 7.1 1.8 < 1 5.1 0.45 < 0.02 0.75 0.051
Feb 26 26 8.7 9.7 6.3 2.6 7.0 0.40 <0.02 1.02 0.079
Mar 21 24 11 6.9 5.6 2.4 6.9 0.52 <0.02 0.77 0.070
Apr 22 23 12 5.4 5.4 2.4 7.2 0.80 < 0.02 0.66 0.054
May 25 30 8.3 5.9 7.1 3.0 8.2 0.55 0.06 0.45 0.079
Jun 23 26 8.3 5.8 6.0 2.6 7.7 1.71 0.12 0.44 0.079
Jul 22 29 12 10 6.3 3.1 5.9 0.90 0.19 0.27 0.119
Aug 25 23 7.6 7.6 5.3 2.4 7.1 0.63 0.08 0.24 0.091
Sep 24 27 7.8 6.1 6.5 2.7 8.7 0.58 0.03 0.60 0.100
Oct 24 28 12 5.3 6.5 2.7 6.5 0.32 0.13 1.54 0.127
Nov 21 22 10 6.9 5.3 2.1 5.2 0.62 < 0.02 0.65 0.092
Dec 23 50 9.6 7.4 8.9 6.6 6.9 3.932 0.18 0.42 0.6542
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.3 13 78 9.4 56 181 1.6 <0.2 <2 <10
Feb 2.9 30 95 14 64 304 2.4 <0.2 <2 13
Mar 2.8 34 108 19 111 762 2.9 <0.2 <2 <10
Apr 2.3 28 106 17 57 398 1.9 <0.2 <2 <10
May 4.1 6.5 130 41 76 3,080 5.9 <0.2 2.8 14
Jun 2.6 66 93 18 70 576 3.1 <0.2 2.4 <10
Jul 3.0 46 107 48 61 1240 3.2 <0.2 <2 11
Aug 3.3 28 96 18 68 1750 3.0 <0.2 <2 <10
Sep 4.2 76 105 22 95 617 3.0 <0.2 <2 <10
Oct 4.8 52 132 40 77 1020 3.8 <0.2 <2 10
Nov 3.7 38 78 6.6 66 272 5.6 <0.2 <2 14
Dec 4.1 31 1802 16 82 62 20,0002 402 <0.2 4.2 962
Appendix D - 8
Table D-3 (continued)
Blewett Falls Lake (Station BFF2, surface)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 18 4.7 11 8.0 1.9 < 1 5.7 0.38 0.02 0.83 0.051
Feb 23 23 7.8 8.6 5.6 2.2 6.6 0.48 0.04 0.83 0.044
Mar 22 26 12 8.2 6.1 2.6 8.1 0.92 < 0.02 0.87 0.068
Apr 24 23 12 5.7 5.2 2.5 8.0 0.57 <0.02 0.66 0.052
May 26 28 9.3 6.5 6.4 2.9 9.5 0.49 < 0.02 0.69 0.080
Jun 19 24 8.7 5.6 5.7 2.5 7.5 1.38 <0.02 0.44 0.092
Jul 22 27 13 7.9 5.7 3.0 6.8 0.90 <0.02 0.09 0.056
Aug 26 21 7.2 5.8 4.9 2.2 7.2 0.52 <0.02 <0.02 0.047
Sep 21 22 6.7 5.7 5.4 2.2 7.8 0.46 0.14 0.58 0.057
Oct 19 24 11 5.6 6.0 2.3 6.3 0.36 <0.02 0.64 0.058
Nov 20 21 10 7.1 5.2 2.0 5.0 0.40 < 0.02 0.68 0.047
Dec 24 24 7.8 7.6 5.4 2.5 6.3 0.52 0.07 0.65 0.085
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.2 7.2 76 5.1 62 192 3.6 < 0.2 < 2 <10
Feb 2.7 14 94 5.5 54 146 1.4 <0.2 <2 <10
Mar 3.0 17 101 9.6 106 298 2.2 <0.2 <2 22
Apr 2.5 12 105 10 68 178 1.8 <0.2 <2 11
May 3.7 0.9 88 8.9 74 287 2.5 <0.2 <2 <10
Jun 2.8 20 84 6.6 68 496 2.4 <0.2 2.3 <10
Jul 2.8 2.5 71 6.2 59 86 1.6 <0.2 3 13
Aug 2.9 7.8 80 8.6 62 392 <2.0 <0.2 2 <10
Sep 3.6 10 86 12 77 283 2.0 <0.2 <2 <10
Oct 4.4 8.6 84 6.9 67 275 2.6 <0.2 <2 <10
Nov 3.5 9.8 80 4.4 58 132 3.0 <0.2 <2 12
Dec 4.3 28 88 17 78 940 3.1 <0.2 <2 15
Appendix D - 9
Table D-3 (continued)
Blewett Falls Lake (Station BFF2, bottom)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 15 9.2 10 9.1 2.0 1.0 5.7 0.46 0.02 0.52 0.068
Feb 24 24 7.8 8.7 5.8 2.3 6.6 0.47 0.05 0.74 0.054
Mar 23 26 12 7.5 6.2 2.6 7.9 0.84 <0.02 0.86 0.096
Apr 28 29 14 12 6.2 3.3 10 1.04 0.19 0.71 0.205
May 25 29 8.7 7.6 6.6 3.0 9.2 0.54 0.06 0.61 0.083
Jun 19 26 7.7 5.9 6.0 2.6 6.9 1.15 0.15 0.34 0.077
Jul 24 32 13 6.3 7.2 3.5 6.8 0.83 0.21 0.22 0.074
Aug 36 30 8.2 6.5 6.4 3.3 7.4 1.10 0.31 0.13 0.179
Sep 21 23 6.8 5.2 5.7 2.2 7.9 0.46 <0.02 0.59 0.066
Oct 20 22 11 5.8 5.4 2.2 5.8 0.40 0.03 0.53 0.076
Nov 22 28 11 6.4 6.9 2.6 6.4 0.41 < 0.02 0.79 0.072
Dec 22 24 7.9 7.8 5.4 2.5 6.5 0.50 0.04 0.64 0.089
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.2 19 84 13 66 587 9.4 <0.2 <2 <10
Feb 2.2 18 97 8.2 56 284 1.6 <0.2 <2 11
Mar 2.9 28 112 33 104 854 3.1 <0.2 <2 18
Apr 2.8 153 186 100 90 1,940 5.2 <0.2 <2 10
May 3.9 2.6 115 36 74 993 3.4 < 0.2 2 < 10
Jun 2.6 90 88 27 66 719 3.2 <0.2 <2 <10
Jul 2.6 65 90 30 57 726 2.5 < 0.2 < 2 < 10
Aug 2.9 77 178 84 73 3,830 7.0 <0.2 <3.6 13
Sep 3.6 30 95 21 82 439 3.0 <0.2 <2 <10
Oct 4.5 78 104 23 60 884 3.5 <0.2 <2 <10
Nov 3.5 35 91 11 73 335 3.2 <0.2 <2 13
Dec 4.2 36 101 25 80 631 2.9 <0.2 <2 11
Appendix D - 10
Table D-3 (continued)
Blewett Falls Lake (Station BFH2, surface)-2004
Month Total
Alkalinity Hardness
(calculated) CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+
nitrite-N TP
Jan 21 4.1 9.5 5.8 1.6 < 1 4.9 0.55 0.05 0.69 0.037
Feb 28 30 9.8 12 7.0 2.9 8.0 0.39 <0.02 1.36 0.089
Mar 22 27 13 10 6.4 2.7 8.7 0.69 <0.02 1.03 0.081
Apr 33 32 16 7.4 7.1 3.6 12 0.74 0.02 1.13 0.122
May 22 25 7.4 5.6 5.8 2.6 7.8 0.30 <0.02 0.44 0.033
Jun 20 23 7.5 5.2 5.3 2.4 6.6 1.33 0.06 0.40 0.043
Jul 24 26 12 3.5 5.3 3.0 5.9 0.73 <0.02 0.14 0.034
Aug 24 21 7.0 5.5 4.7 2.2 7.1 0.65 <0.02 <0.02 0.042
Sep 20 21 6.8 5.9 5.1 2.1 7.9 0.43 0.07 0.56 0.052
Oct 19 21 10 5.2 5.1 2.0 5.4 0.43 0.02 0.53 0.055
Nov 22 20 9.6 9.7 4.7 1.9 4.8 0.37 <0.02 0.55 0.035
Dec 23 27 8.6 9.4 5.9 2.9 6.7 0.52 <0.02 0.74 0.103
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.5 6.0 64 2.7 56 115 1.3 <0.2 <2 <10
Feb 3.0 13 105 5.8 52 152 1.8 <0.2 <2 <10
Mar 2.8 14 107 9.2 105 280 2.3 <0.2 <2 <10
Apr 3.5 9.3 115 5.6 104 136 2.2 <0.2 <2 <10
May 3.0 0.5 71 5.5 72 185 1.7 <0.2 <2 <10
Jun 2.7 13 72 7.6 64 252 2.3 <0.2 2.3 <10
Jul 2.7 3.8 64 6.8 60 104 1.7 <0.2 2.5 <10
Aug 3.0 5.6 79 7.0 64 280 <2.0 <0.2 <2 <10
Sep 3.8 7.5 82 7.6 80 226 2.0 <0.2 <2 <10
Oct 4.6 11 84 11 58 314 2.5 <0.2 <2 12
Nov 3.5 7.7 76 4.8 63 177 4.2 <0.2 <2 13
Dec 4.8 31 92 15 83 884 3.2 <0.2 <2 14
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
2 Aluminum (20,000 µg/L), copper (40 pg/L), total nitrogen (3.93), total phosphorus (0.654), total suspended solids
(168), and COD (96 mg/L) values were unusually high at Station B2, bottom waters, during December 2004 and
suspected of being contaminated with lake bottom sediments.
Appendix D - 11
Table D-4 Concentrations of water chemistry parameters in the Pee Dee River below
the Blewett Falls Development (Stations BF1B, BF2B, BF3B, and BF4B)
during 1999.1
Pee Dee River below Blewett Falls Development (Station BF1B)-1999
Month Total Hardness CT SO4 Ca 2, Mgr Na TN NH3-N Nitrate+
Alkalinity (calculated) nitrite-N
Jan 28 25 11 7.0 5.8 2.5 14 0.77 <0.05 0.42
Feb 24 23 10 6.0 5.6 2.2 11 0.90 <0.05 0.56
Mar 25 25 8.0 4.0 5.9 2.4 12 0.85 < 0.05 0.56
Apr 8 23 10 8.0 5.3 2.3 12 0.89 0.11 0.45
May 23 19 10 10 4.4 2.0 9.1 0.94 0.16 0.49
Jun 26 24 9.8 8.9 5.2 2.6 14 1.0 0.17 0.25
Jul 28 25 9.0 7.0 5.7 2.7 15 0.92 0.22 0.19
Aug 28 23 9.0 7.0 4.9 2.5 13 0.73 0.13 0.07
Sep 28 21 12 9.1 4.2 2.6 16 0.35 0.14 0.09
Oct 26 23 10 10 5.0 2.6 10 0.64 0.06 0.45
Nov 31 24 14 11 5.3 2.7 14 0.71 0.21 0.41
Dec 35 29 17 13 6.4 3.2 18 1.2 0.09 0.59
Month TP TOC Turbidity TS TSS TDS Al Cu Hg COD
Jan 0.050 4.5 18 86 5.0 66 570 10.0 <0.2 <20
Feb 0.072 3.6 26 103 11 97 350 6.7 <0.2 <20
Mar 0.070 3.5 25 104 9.0 91 540 2.4 <0.2 <20
Apr 0.046 3.8 7.7 84 4.0 72 210 7.1 <0.2 <20
May 0.051 4.1 9.4 74 5.0 77 150 <1.0 <0.2 <20
Jun 0.056 3.7 12 86 14 72 290 2.7 <0.2 <20
Jul 0.107 3.5 33 95 26 80 680 2.4 <0.2 <20
Aug 0.055 3.4 13 93 11 88 430 2.2 <0.2 39
Sep 0.066 3.6 24 97 18 54 510 9.6 <0.2 <20
Oct 0.093 5.2 34 76 20 84 970 1.6 <0.2 36
Nov 0.051 4.7 12 88 <5 94 230 1.7 <0.2 <20
Dec 0.130 4.7 8.5 106 <5 109 180 3.0 <0.2 23
Appendix D - 12
Table D-4 (continued)
Pee Dee River below Blewett Falls Development (Station BF2B)-1999
Month Total Hardness CF SO4 Ca 2,
Mgz+
Na
TN
NH3-N
Nitrate+
Alkalinity (calculated) nitrite-N
Jan 25 22 11 6.0 5.1 2.2 12 0.73 < 0.05 0.41
Feb 22 17 10 5.0 5.1 2.2 10 1.1 <0.05 0.69
Mar 23 22 7.0 3.0 5.2 2.1 11 0.88 <0.05 0.52
Apr 14 20 10 8.0 4.5 2.2 9.2 0.76 < 0.05 0.44
May 27 20 10 10 4.7 2.1 10 0.85 < 0.05 0.53
Jun 24 22 12 9.6 4.8 2.4 15 0.85 < 0.05 0.41
Jul 24 25 10 7.0 5.4 2.7 15 0.84 0.10 0.38
Aug 20 20 12 7.0 4.1 2.4 14 0.43 < 0.05 0.12
Sep 32 21 13 9.4 4.4 2.5 17 0.39 <0.05 0.09
Oct 26 23 10 9.0 4.9 2.5 9.4 0.74 <0.05 0.48
Nov 24 22 14 10 4.9 2.3 13 0.71 < 0.05 0.39
Dec 29 24 16 11 5.2 2.6 17 0.90 0.09 0.42
Month TP TOC Turbidity TS TSS TDS Al Cu Hg COD
Jan 0.058 4.0 44 99 17 75 1,400 1.9 <0.2 <20
Feb 0.076 4.2 32 108 14 100 560 4.0 <0.2 <20
Mar 0.055 3.9 12 88 <3 87 320 5.0 <0.2 <20
Apr 0.047 3.9 4.8 75 <3 69 130 2.9 <0.2 <20
May 0.076 3.9 7.8 82 3.0 78 130 <1.0 <0.2 <20
Jun 0.057 3.5 7.4 85 3.8 76 160 3.6 <0.2 <20
Jul 0.064 3.5 6.2 29 <3 84 140 1.5 <0.2 <20
Aug 0.056 3.7 3.8 89 <3 83 110 1.5 <0.2 52
Sep 0.053 4.0 5.0 94 <3 64 100 2.1 <0.2 <20
Oct 0.081 5.6 25 82 13 101 760 1.5 <0.2 22
Nov 0.054 5.3 6.0 74 < 5 97 190 1.4 < 0.2 <20
Dec 0.073 4.0 11 112 <5 93 220 2.4 <0.2 <20
Appendix D - 13
Table D-4 (continued)
Pee Dee River below Blewett Falls Development (Station BF3B)-1999
Month Total Hardness CF SO4 Ca 2,
Mgz+
Na
TN
NH3-N
Nitrate+
Alkalinity (calculated) nitrite-N
Jan 25 18 13 6.0 4.4 1.8 18 0.72 <0.05 0.32
Feb 23 20 10 5.0 4.8 2.0 12 0.99 <0.05 0.67
Mar 32 24 7.0 3.0 6.0 2.2 23 1.0 0.08 0.46
Apr 37 20 13 10 4.6 2.0 18 0.78 0.07 0.38
May 27 22 13 12 5.1 2.2 16 0.83 0.08 0.51
Jun 38 22 14 12 4.8 2.4 21 0.86 0.27 0.39
Jul 28 25 19 9.0 5.2 2.8 26 0.93 0.06 0.47
Aug 28 20 12 8.0 4.0 2.4 20 0.44 < 0.05 0.06
Sep 40 21 19 13 4.4 2.4 26 4.9 0.07 0.12
Oct 26 23 12 9.0 5.0 2.5 11 0.66 <0.05 0.48
Nov 31 21 16 12 4.7 2.3 19 0.69 < 0.05 0.40
Dec 33 22 17 12 5.0 2.4 18 0.79 0.10 0.33
Month TP TOC Turbidity TS TSS TDS Al Cu Hg COD
Jan 0.065 5.1 23 92 13 70 430 5.0 <0.2 <20
Feb 0.073 5.1 30 121 14.5 102 320 4.6 <0.2 <20
Mar 0.086 4.8 18 113 8.7 107 340 7.9 <0.2 <20
Apr 0.092 4.1 9.1 104 7.2 95 180 7.2 <0.2 <20
May 0.078 4.9 20 104 12 83 220 3.0 <0.2 21
Jun 0.093 3.8 15 111 11.6 95 260 2.7 <0.2 <20
Jul 0.119 4.6 23 127 15.5 102 470 2.2 < 0.2 21
Aug 0.076 4.0 9.4 111 12.7 95 390 2.3 <0.2 <20
Sep 0.102 5.1 19 147 17 82 390 9.3 <0.2 <20
Oct 0.096 6.7 32 94 18 105 1,200 2.0 <0.2 24
Nov 0.059 6.1 6.9 88 <5 118 150 1.6 <0.2 <20
Dec 0.073 3.8 17 128 12 99 430 2.2 <0.2 <20
Appendix D - 14
Table D-4 (continued)
Pee Dee River below Blewett Falls Development (Station BF4B)-1999
Month Total

Alkalinity Hardness

(calculated) CF SO4 Ca 2,
Mg2+
Na
TN
NH3-N
Nitrate+
nitrite-N
Jan 25 22 12 7.0 5.3 2.0 15 0.59 <0.05 0.36
Feb 22 20 10 5.0 4.8 1.9 11 0.99 <0.05 0.62
Mar 26 22 5.0 < 2 5.2 2.1 15 0.76 0.07 0.44
Apr 15 21 14 9.0 4.8 2.1 17 0.92 0.08 0.54
May 23 20 12 11 4.5 2.0 14 0.72 < 0.05 0.48
Jun 40 21 16 13 4.6 2.1 28 0.99 0.06 0.35
Jul 24 24 13 7.0 5.5 2.4 19 0.83 0.16 0.33
Aug 36 22 19 10 4.8 2.5 27 0.53 <0.05 0.08
Sep 40 20 18 13 4.1 2.4 30 5.8 <0.05 0.06
Oct 16 18 10 6.0 4.0 2.0 8.2 0.48 <0.05 0.27
Nov 18 19 12 7.0 4.3 2.1 11 0.77 <0.05 0.20
Dec 26 19 16 11 4.2 2.0 18 0.78 <0.05 0.29
Month TP TOC Turbidity TS TSS TDS Al Cu Hg COD
Jan 0.077 6.5 25 91 14 60 430 4.3 <0.2 <20
Feb 0.079 5.6 25 106 14 100 320 4.0 <0.2 <20
Mar 0.091 4.3 26 105 14 97 390 2.5 <0.2 <20
Apr 0.094 4.7 16 99 16 90 310 6.6 <0.2 <20
May 0.091 5.3 32 111 32 188 320 <1.0 <0.2 23
Jun 0.122 4.0 23 133 26 106 430 7.4 <0.2 <20
Jul 0.137 7.4 26 117 28 115 600 2.1 <0.2 <20
Aug 0.102 5.6 15 141 15 125 430 2.1 <0.2 47
Sep 0.128 4.2 26 165 30 118 570 15 <0.2 <20
Oct 0.095 9.2 35 104 23 91 1,000 1.3 <0.2 24
Nov 0.094 15 13 92 7.0 114 360 1.4 <0.2 39
Dec 0.091 4.6 26 122 17 96 370 1.9 <0.2 <20
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
Appendix D - 15
Table D-5 Concentrations of water chemistry parameters in the Pee Dee River below
the Blewett Falls Development (Stations BF1B, BF2B, BF3B, and BF4B)
during 2001.1
Pee Dee River below Blewett Falls Development (Station BF1B)-2001
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 29 27 14 10 6.2 2.7 13 0.98 0.05 0.59 0.060
Feb 32 33 18 12 7.5 3.4 18 1.1 <0.05 0.63 0.140
Mar 22 28 13 9.3 6.5 2.9 9.3 1.4 <0.05 0.79 0.160
Apr 26 27 10 13 6.6 2.4 9.8 0.92 0.12 0.66 0.057
May 27 27 15 15 6.3 2.8 13 0.96 0.41 0.48 0.074
Jun 27 23 12 15 5.0 2.5 12 1.1 0.22 0.53 0.084
Jul 28 25 9.3 12 5.9 2.4 8.7 0.90 0.17 0.38 0.066
Aug 36 27 15 14 6.9 2.3 17 0.94 0.08 0.41 0.097
Sep 32 26 13 12 6.4 2.4 14 0.72 <0.05 0.30 0.077
Oct 39 29 24 22 6.8 3.0 23 0.81 <0.02 0.34 0.062
Nov 46 35 25 24 8.5 3.4 25 0.89 0.06 0.30 0.052
Dec 37 32 15 17 7.5 3.2 17 0.39 0.07 0.39 0.106
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.3 6.0 91 <5 68 130 1.6 <0.2 <2 <20
Feb 5.6 18 80 14 112 330 2.5 <0.2 <2 <20
Mar 6.8 43 94 18 92 1,300 4.6 <0.2 3.0 33
Apr 3.8 4.9 90 <1 83 138 3.0 <0.2 <2 17
May 4.5 5.5 91 2.6 84 82 3.0 <0.2 <2 13
Jun 4.3 4.2 102 5.0 79 131 2.0 < 0.2 < 2 23
Jul 4.2 14 113 8.6 111 276 3.0 <0.2 <2 17
Aug 4.1 8.0 119 4.8 90 173 2.0 < 0.2 < 2 12
Sep 4.0 4.5 85 2.2 80 87 1.9 <0.2 <2 <10
Oct 3.2 3.1 124 1.4 116 58 1.7 <0.2 <2 16
Nov 5.4 2.1 108 2.2 130 79 1.6 <0.2 <2 21
Dec 6.3 12 120 12 115 186 2.3 <0.2 <2 15
Appendix D - 16
Table D-5 (continued)
Pee Dee River below Blewett Falls Development (Station BF2B)-2001
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 25 20 13 8.0 4.6 2.0 12 0.55 0.07 0.22 0.030
Feb 30 29 20 11 6.8 3.0 19 0.95 <0.05 0.55 0.087
Mar 16 23 8.9 8.0 5.2 2.5 9.0 1.3 <0.05 0.75 0.134
Apr 25 27 11 14 6.7 2.5 10 0.97 0.09 0.68 0.066
May 30 31 14 15 7.2 3.2 15 0.78 0.34 0.50 0.056
Jun 29 22 14 16 4.8 2.5 13 1.1 0.10 0.63 0.088
Jul 26 23 16 14 5.4 2.4 13 0.79 0.06 0.46 0.070
Aug 33 24 16 18 6.0 2.2 17 0.87 <0.05 0.45 0.084
Sep 30 27 15 16 6.5 2.6 16 0.64 <0.05 0.27 0.354
Oct 33 25 21 13 5.9 2.4 18 0.43 <0.02 0.04 0.043
Nov 38 28 26 23 6.6 2.8 23 0.50 <0.02 0.06 0.030
Dec 34 29 16 18 6.9 2.9 18 0.49 < 0.02 0.49 0.080
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.8 2.7 81 <5 123 53 1.3 <0.2 <2 <20
Feb 4.7 11 84 8.0 95 210 1.6 <0.2 <2 21
Mar 7.0 31 78 12 81 880 3.6 <0.2 <2 35
Apr 3.9 9.3 96 4.0 79 180 3.0 <0.2 <2 18
May 4.0 2.2 96 <1 98 50 3.0 <0.2 <2 12
Jun 4.3 1.9 114 1.0 82 66 2.0 <0.2 <2 19
Jul 4.4 4.3 127 1.0 127 95 2.0 <0.2 <2 20
Aug 3.8 6.9 117 3.4 90 162 2.0 <0.2 <2 10
Sep 3.7 2.6 102 1.2 88 51 2.0 <0.2 <2 <10
Oct 3.5 1.6 100 <1 98 <50 2.0 <0.2 <2 18
Nov 5.6 1.5 100 1.2 119 <50 1.6 <0.2 <2 21
Dec 6.2 3.5 131 2.0 119 <50 2.3 <0.2 <2 13
Appendix D - 17
Table D-5 (continued)
Pee Dee River below Blewett Falls Development (Station BF3B)-2001
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 33 18 16 10 4.2 1.9 19 0.64 0.07 0.25 0.050
Feb 35 27 25 15 6.5 2.7 27 1.0 <0.05 0.44 0.074
Mar 21 24 16 10 5.6 2.5 14 1.4 0.09 0.62 0.146
Apr 27 25 12 17 6.2 2.3 13 1.1 0.10 0.57 0.088
May 36 29 20 24 6.7 3.0 24 1.3 0.40 0.64 0.096
Jun 30 18 15 14 3.7 2.1 16 0.98 0.14 0.44 0.088
Jul 31 23 14 14 5.3 2.3 14 0.91 0.05 0.42 0.094
Aug 43 30 25 26 7.7 2.5 31 1.0 0.08 0.46 0.091
Sep 37 29 20 17 7.2 2.7 22 1.0 0.22 0.34 0.123
Oct 62 27 42 37 6.9 2.3 52 0.75 0.04 0.14 0.133
Nov 47 30 37 35 7.2 2.9 43 0.76 0.10 0.10 0.073
Dec 44 30 23 25 7.1 3.0 32 0.43 0.04 0.43 0.088
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 5.0 6.5 107 9.6 105 220 1.5 < 0.2 < 2 < 20
Feb 6.5 13 118 10 116 260 1.5 <0.2 2.0 <20
Mar 7.9 35 94 13 90 1,000 4.0 <0.2 3.0 31
Apr 5.1 18 99 16 89 344 3.0 <0.2 <2 14
May 6.7 5.3 140 4.8 111 102 3.0 <0.2 <2 15
Jun 4.6 5.4 128 5.6 96 182 2.0 <0.2 <2 21
Jul 4.8 12 138 7.0 128 217 3.0 <0.2 <2 25
Aug 5.7 10 167 12 137 233 2.0 < 0.2 < 2 23
Sep 4.6 6.5 117 11 100 150 1.9 <0.2 <2 12
Oct 6.5 2.6 202 1.2 209 92 2.4 <0.2 <2 32
Nov 8.6 7.7 156 6.2 177 264 2.0 <0.2 <2 28
Dec 8.3 17 162 16 155 332 3.1 <0.2 <2 19
Appendix D - 18
Table D-5 (continued)
Pee Dee River below Blewett Falls Development (Station BF4B)-2001
Month Total
Alkalinity Hardness
(calculated) CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+
nitrite-N TP
Jan 17 15 13 7.0 3.5 1.6 10 1.0 0.06 0.18 0.067
Feb 29 24 16 10 5.6 2.5 17 0.85 <0.05 0.42 0.119
Mar 19 24 14 8.8 5.5 2.5 10 1.4 < 0.05 0.69 0.175
Apr 26 25 11 16 6.2 2.3 11 1.0 0.09 0.54 0.094
May 35 28 16 16 6.4 2.8 20 0.73 0.33 0.31 0.138
Jun 36 22 17 16 4.7 2.4 21 1.1 0.16 0.46 0.167
Jul 37 22 18 17 5.1 2.3 20 0.99 <0.05 0.44 0.158
Aug 36 25 17 16 6.3 2.2 22 0.79 <0.05 0.23 0.157
Sep 40 29 22 23 7.2 2.7 31 1.0 <0.05 0.38 0.187
Oct 45 19 24 21 4.6 1.8 30 0.72 <0.02 0.28 0.239
Nov 55 29 38 39 6.9 2.8 49 0.96 0.04 0.45 0.215
Dec 50 32 25 27 7.6 3.2 37 0.47 0.08 0.47 0.164
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 9.9 13 95 6.7 99 0 1.6 <0.2 <2 <20
Feb 4.8 37 94 28 80 5 1.9 <0.2 <2 <20
Mar 8.1 47 100 21 92 M 4.4 <0.2 <2 <20
Apr 4.7 22 102 16 78 9 5.0 <0.2 <2 20
May 4.7 30 143 31 93 4 3.0 <0.2 <2 12
Jun 6.3 12 131 7.2 99 M 2.0 <0.2 2.0 24
Jul 6.7 21 177 15 151 4 3.0 <0.2 2.3 30
Aug 3.9 21 151 25 97 5 3.0 < 0.2 < 2 15
Sep 4.6 9.1 145 6.2 118 9 2.3 <0.2 <2 16
Oct 3.4 4.1 132 7.6 133 9 2.2 <0.2 <2 <10
Nov 7.9 4.5 176 1.8 195 8 2.4 <0.2 <2 27
Dec 8.4 8.6 165 6.0 161 1 3.4 <0.2 <2 20
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO, and hardness is calculated as mg equivalents CaCO,/L.
Appendix D - 19
Table D-6 Concentrations of water chemistry parameters in the Pee Dee River below
the Blewett Falls Development (Stations BFOB, BF1B, BF2B, BF3B, and
BF4B) during 2004.1
Pee Dee River below Blewett Falls Development
(Station BFOB, Generation Flow)-2004
Month Total Hardness CF SO4 Cat Mgz+ Na TN NH3-N Nitrate+ TP
Alkalinity (calculated) nitrite-N
Jan 18 4.2 10 6.2 1.7 < 1 5.2 0.35 < 0.02 0.76 0.049
Feb 26 27 8.6 7.3 6.5 2.7 7.3 0.57 0.03 1.04 0.073
Mar 20 24 11 7.2 5.8 2.4 7.2 0.89 < 0.02 0.77 0.063
Apr 22 22 12 5.6 5.0 2.2 6.8 0.70 <0.02 0.66 0.058
May 22 26 8.0 5.9 5.9 2.7 7.8 0.50 0.02 0.40 0.061
Jun 23 25 8.9 6.0 5.9 2.5 7.9 1.5 0.07 0.41 0.075
Jul 21 25 12 < 2 5.2 2.9 5.4 0.43 0.08 0.23 0.052
Aug 26 22 7.1 6.1 5.0 2.3 7.1 0.74 <0.02 0.08 0.063
Sep 24 25 7.6 6.4 5.9 2.5 8.4 0.59 <0.02 0.58 0.087
Oct 20 26 12 5.9 6.1 2.5 6.3 0.57 0.04 0.46 0.086
Nov 22 26 11 6.6 6.4 2.5 6.3 0.42 < 0.02 0.72 0.059
Dec 24 23 9.6 6.8 5.2 2.4 6.6 0.58 0.05 0.63 0.086
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.4 10 74 7.9 58 199 1.5 <0.2 <2 <10
Feb 2.9 22 102 9.8 56 264 1.8 <0.2 <2 12
Mar 2.6 24 108 12 103 355 2.2 <0.2 <2 <10
Apr 2.5 24 104 14 69 309 1.8 <0.2 <2 <10
May 3.6 2.2 92 25 71 746 2.4 <0.2 2.1 10
Jun 2.7 32 90 15 76 446 2.7 <0.2 2.6 <10
Jul 2.6 9.7 82 13 66 388 1.9 <0.2 <2 <10
Aug 3.4 6.5 79 8.0 60 446 2.0 < 0.2 2 12
Sep 3.9 18 100 18 88 500 3.0 <0.2 <2 <10
Oct 4.7 27 101 22 70 687 3.4 <0.2 <2 <10
Nov 3.6 19 90 8.5 66 386 3.8 <0.2 <2 13
Dec 3.0 25 100 34 69 665 4.0 <0.2 <2 <10
Appendix D - 20
Table D-6 (continued)
Pee Dee River below Blewett Falls Development
(Station BF113, No Generation Flow)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 14 8.0 10 8.0 3.2 <1 4.9 0.27 < 0.02 0.67 0.063
Feb 24 27 8.6 7.7 6.5 2.7 7.2 0.77 0.03 1.04 0.068
Mar 20 23 11 5.8 5.4 2.4 6.9 0.60 0.02 0.79 0.058
Apr 21 21 11 8.0 4.5 2.3 7.1 0.68 0.03 0.65 0.044
May 21 21 7.6 6.2 4.8 2.3 6.8 0.42 0.07 0.40 0.059
Jun 19 22 8.2 5.0 5.0 2.4 7.3 1.2 0.11 0.41 0.055
Jul 22 24 12 7.4 4.8 3.1 5.8 0.58 0.10 0.31 0.037
Aug 22 16 7.2 7.5 3.3 1.9 5.7 0.57 <0.02 0.36 0.084
Sep 24 25 7.6 6.3 5.7 2.6 10 0.53 0.05 0.62 0.082
Oct 11 24 11 6.5 5.8 2.3 5.6 0.41 0.05 0.62 0.071
Nov 18 22 11 5.6 5.4 2.1 5.1 0.47 0.03 0.59 0.051
Dec 25 23 11 7.1 5.4 2.4 6.7 0.39 0.02 0.71 0.051
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.4 19 89 27 70 216 1.7 <0.2 <2 <10
Feb 3.0 17 82 8.3 60 254 2.3 <0.2 <2 <10
Mar 2.8 17 104 6.0 108 280 2.4 <0.2 <2 11
Apr 2.8 13 66 6.4 76 210 1.7 <0.2 <2 <10
May 3.1 0.6 78 8.8 81 257 1.6 <0.2 <2 <10
Jun 2.8 15 73 4.2 70 244 2.2 < 0.2 < 2 < 10
Jul 2.8 3.0 66 3.4 59 107 1.6 <0.2 <2 <10
Aug 3.6 6.3 81 7.8 76 762 3.0 <0.2 <2 <10
Sep 4.3 9.1 94 16 84 293 3.0 <0.2 <2 <10
Oct 3.9 13 90 8.8 83 348 2.8 <0.2 <2 10
Nov 3.8 6.6 90 1.5 77 130 2.8 <0.2 <2 11
Dec 3.6 9.1 74 3.5 68 162 2.2 <0.2 <2 <10
Appendix D - 21
Table D-6 (continued)
Pee Dee River below Blewett Falls Development
(Station BF1B, Generation Flow)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 17 3.9 9.7 6.7 1.6 < 1 4.9 0.35 < 0.02 0.72 0.047
Feb 22 28 8.4 7.9 6.6 2.7 7.4 0.37 0.04 1.02 0.077
Mar 19 24 11 6.8 5.6 2.4 7.0 0.45 < 0.02 0.76 0.066
Apr 20 22 11 5.4 5.0 2.3 7.2 0.76 0.03 0.56 0.058
May 23 26 7.9 6.2 5.8 2.7 7.8 0.48 0.03 0.45 0.062
Jun 21 25 8.0 5.2 5.6 2.6 7.9 1.8 0.13 0.45 0.075
Jul 23 24 12 7.7 4.8 3.0 5.5 0.60 0.11 0.27 0.049
Aug 21 18 7.2 5.5 3.5 2.4 7.0 0.65 0.02 0.33 0.092
Sep 24 27 7.8 6.4 6.1 2.8 8.8 0.53 0.04 0.63 0.099
Oct 22 25 12 5.2 6.0 2.5 6.3 0.58 0.06 0.69 0.083
Nov 25 26 12 8.1 6.4 2.5 6.8 0.42 0.04 0.75 0.076
Dec 22 22 9.8 6.8 5.0 2.3 6.4 0.54 0.06 0.62 0.077
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.6 11 67 8.4 60 207 1.5 <0.2 <2 <10
Feb 3.1 21 104 11 56 322 2.1 <0.2 <2 11
Mar 2.8 27 106 13 103 404 2.6 < 0.2 < 2 <10
Apr 2.6 33 119 13 52 253 1.9 <0.2 <2 <10
May 3.6 2.1 88 20 77 741 2.3 <0.2 <2 11
Jun 2.8 28 91 12 76 479 2.7 < 0.2 2.2 <10
Jul 2.6 14 78 13 66 484 2.1 <0.2 <2 <10
Aug 3.6 11 80 6.2 68 476 2.0 <0.2 <2 <10
Sep 4.4 19 102 15 88 531 3.0 <0.2 <2 <10
Oct 4.7 17 85 11 76 396 2.8 <0.2 <2 <10
Nov 3.7 15 102 6.4 68 144 3.4 <0.2 <2 13
Dec 3.3 23 98 16 66 792 3.0 <0.2 <2 <10
Appendix D - 22
Table D-6 (continued)
Pee Dee River below Blewett Falls Development
(Station BF2B, No Generation Flow)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 12 7.7 10 6.8 3.1 <1 5.2 0.30 <0.02 0.65 0.028
Feb 23 27 8.5 8.1 6.5 2.7 7.7 0.34 <0.02 0.98 0.063
Mar 19 22 11 7.8 5.2 2.3 7.0 0.39 <0.02 0.76 0.052
Apr 20 22 13 5.6 4.9 2.3 8.6 0.65 <0.02 0.61 0.037
May 20 21 7.9 5.4 4.5 2.3 7.2 0.37 <0.02 0.45 0.040
Jun 15 19 8.7 5.8 4.1 2.2 8.5 1.04 0.05 0.46 0.075
Jul 24 24 13 6.7 4.8 2.8 5.5 0.48 <0.02 0.06 0.037
Aug 20 20 7.7 5.1 4.3 2.3 7.4 0.53 <0.02 0.39 0.084
Sep 23 25 8.3 7.1 5.9 2.6 9.0 0.44 <0.02 0.64 0.090
Oct 22 26 12 11 6.4 2.5 6.5 0.39 <0.02 0.67 0.085
Nov 20 23 12 7.1 5.6 2.1 5.2 0.67 <0.02 0.57 0.056
Dec 22 20 11 7.1 4.7 2.0 7.0 0.35 <0.02 0.61 0.049
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.5 2.2 68 2.1 64 178 1.5 <0.2 <2 <10
Feb 3.1 19 91 7.2 57 227 1.8 <0.2 <2 11
Mar 3.0 17 107 12 106 301 2.2 <0.2 <2 <10
Apr 3.0 9.0 76 1.9 62 123 1.5 < 0.2 < 2 <10
May 3.0 0.7 77 3.9 70 231 1.6 < 0.2 < 2 <10
Jun 3.2 12 77 3.4 78 306 2.4 <0.2 <2 <10
Jul 3.0 1.2 58 1.7 58 97 1.4 <0.2 <2 <10
Aug 3.9 7.0 77 2.6 64 260 3.0 < 0.2 < 2 <10
Sep 4.4 14 97 12 96 412 2.0 <0.2 <2 <10
Oct 5.0 15 82 9.0 70 364 2.8 <0.2 <2 <10
Nov 4.2 16 90 5.6 78 212 2.8 <0.2 <2 15
Dec 3.7 12 82 4.3 70 225 1.9 <0.2 <2 16
Appendix D - 23
Table D-6 (continued)
Pee Dee River below Blewett Falls Development
(Station BF2B, Generation Flow)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 18 5.5 10 8.9 2.2 <1 5.3 0.36 <0.02 0.72 0.055
Feb 21 30 9.4 6.7 7.0 2.9 8.9 0.52 <0.02 1.02 0.067
Mar 20 22 11 7.0 5.1 2.3 7.1 0.51 <0.02 0.75 0.063
Apr 20 24 12 7.5 5.5 2.5 9.0 0.33 0.08 0.62 0.036
May 21 24 8.1 5.9 5.3 2.6 7.9 0.44 0.03 0.55 0.056
Jun 22 22 8.9 5.8 4.7 2.4 7.6 0.38 0.09 0.38 0.076
Jul 22 25 22 5.5 5.0 3.0 6.8 0.53 <0.02 0.16 0.037
Aug 24 22 13 5.5 4.7 2.4 8.4 0.52 0.08 0.28 0.077
Sep 25 28 14 8.5 6.7 2.7 8.5 0.86 0.08 0.92 0.157
Oct 20 23 12 6.1 5.5 2.2 6.5 0.38 <0.02 0.58 0.069
Nov 20 21 12 8.5 5.3 2.0 5.1 0.34 <0.02 0.60 0.057
Dec 22 22 9.7 5.6 5.4 2.1 6.6 1.3 <0.02 0.71 0.057
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 2.7 13 76 10 64 224 1.6 < 0.2 < 2 <10
Feb 3.0 34 139 26 110 368 1.9 <0.2 <2 <10
Mar 3.1 29 104 11 106 458 2.4 <0.2 <2 <10
Apr 2.8 9.5 71 9.7 64 196 1.5 <0.2 <2 <10
May 3.5 1.4 83 13 76 438 2.2 <0.2 <2 <10
Jun 2.6 52 80 17 64 461 2.5 <0.2 <2 <10
Jul 2.8 5.6 51 3.2 79 87 2.3 <0.2 <2 <10
Aug 3.5 9.8 76 7.9 66 324 2.6 <0.2 <2 <10
Sep 6.3 20 118 14 107 560 4.6 <0.2 <2 16
Oct 4.1 24 86 8.6 71 518 2.8 <0.2 <2 <10
Nov 3.7 25 86 6.0 70 350 2.7 <0.2 <2 14
Dec 3.1 11 70 6.7 76 291 2.1 <0.2 <2 <10
Appendix D - 24
Table D-6 (continued)
Pee Dee River below Blewett Falls Development
(Station BF3B, Generation Flow)-2004
Month Total Hardness CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
TP
Alkalinity (calculated) nitrite-N
Jan 19 5.8 12 10 2.3 < 1 7.2 0.37 0.05 0.69 0.054
Feb 23 27 12 8.8 6.4 2.7 10 0.50 <0.02 0.88 0.069
Mar 19 22 12 6.9 5.1 2.2 7.4 0.44 < 0.02 0.72 0.080
Apr 24 26 16 7.0 6.0 2.6 11 0.53 0.03 0.60 0.055
May 23 23 10 5.4 5.0 2.6 9.7 0.43 0.04 0.44 0.063
Jun 21 24 18 9.6 5.1 2.6 11 0.56 0.07 0.48 0.084
Jul 24 24 17 10 4.7 3.1 16 0.60 0.02 0.36 0.056
Aug 29 20 21 10 4.2 2.4 17 0.57 <0.02 0.34 0.115
Sep 25 27 11 12 6.5 2.6 12 0.92 <0.02 0.91 0.173
Oct 22 22 14 8.0 5.4 2.2 8.8 0.38 0.02 0.90 0.080
Nov 20 22 10 6.1 5.5 2.0 7.7 0.41 0.03 0.58 0.061
Dec 22 22 11 6.5 5.1 2.1 7.0 0.58 0.04 0.70 0.070
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 3.0 12 84 8.5 70 216 1.5 <0.2 <2 <10
Feb 4.0 21 105 10 106 437 2.4 <0.2 <2 14
Mar 3.3 19 106 16 103 424 2.5 < 0.2 < 2 <10
Apr 3.4 16 85 13 64 364 1.7 <0.2 <2 <10
May 4.5 1.5 105 15 84 452 3.0 <0.2 <2 12
Jun 3.4 47 101 15 81 487 2.8 <0.2 <2 <10
Jul 3.6 15 111 25 110 864 4.0 <0.2 <2 <10
Aug 4.5 16 115 18 98 518 2.9 <0.2 <2 14
Sep 8.0 24 132 22 109 570 4.4 <0.2 <2 21
Oct 4.6 19 98 17 84 455 2.9 <0.2 <2 11
Nov 4.2 18 97 6.1 80 341 3.0 <0.2 <2 12
Dec 3.8 19 86 13 82 622 2.5 <0.2 <2 <10
Appendix D - 25
Table D-6 (continued)
Pee Dee River below Blewett Falls Development
(Station BF4B, Generation Flow)-2004
Month Total

Alkalinity Hardness

(calculated) CT SO4 Ca2, Mg2+
Na
TN
NH3-N
Nitrate+
nitrite-N
TP
Jan 17 5.3 16 15 2.1 < 1 13 0.43 0.09 0.58 0.066
Feb 21 29 16 9.5 6.9 2.8 10 0.43 0.08 0.96 0.074
Mar 20 22 13 8.8 5.0 2.2 9.9 0.54 0.05 0.74 0.062
Apr 22 24 14 9.1 5.3 2.5 9.6 0.44 < 0.02 0.62 0.085
May 27 24 11 6.3 5.1 2.6 11 0.45 0.03 0.50 0.094
Jun 28 25 23 15 5.4 2.9 21 0.65 0.07 0.71 0.036
Jul 25 26 50 7.9 5.1 3.3 10 0.52 0.02 0.24 0.098
Aug 32 22 20 9.8 4.9 2.4 19 0.58 <0.02 0.48 0.141
Sep 25 24 8.0 13 5.7 2.4 8.2 1.1 0.03 0.49 0.159
Oct 23 23 14 8.7 5.6 2.2 10 0.50 0.10 0.63 0.099
Nov 26 21 14 9.2 5.4 1.9 10 0.49 < 0.02 0.61 0.125
Dec 23 36 11 6.4 7.0 4.5 9.0 0.60 0.03 0.75 0.105
Month TOC Turbidity TS TSS TDS Al Cu Hg BOD COD
Jan 4.2 16 105 15 84 293 1.9 <0.2 <2 <10
Feb 3.9 22 118 11 108 388 2.4 <0.2 <2 29
Mar 3.9 25 106 23 104 450 2.7 <0.2 <2 <10
Apr 3.0 25 101 20 82 612 2.2 <0.2 <2 <10
May 4.6 2.9 128 27 78 1,240 3.0 <0.2 <2 <10
Jun 3.9 39 148 41 104 5,320 3.7 <0.2 <2 <10
Jul 3.2 52 81 9.8 93 778 3.1 <0.2 <2 <10
Aug 5.2 12 124 14 88 473 3.9 <0.2 <2 12
Sep 11 16 128 13 106 292 3.4 <0.2 <2 31
Oct 4.9 21 100 20 86 752 3.2 <0.2 <2 14
Nov 4.6 21 112 14 73 431 5.1 <0.2 <2 16
Dec 3.8 34 98 29 87 1,290 3.4 <0.2 <2 11
Units are in mg/liter except trace metals which are in (Dg/liter and turbidity which is in NTU. Total alkalinity is
measured as mg/L as CaCO3 and hardness is calculated as mg equivalents CaCO,/L.
Appendix D - 26
APPENDIX E
MONTHLY TRENDS IN SOLIDS, TURBIDITY, AND NUTRIENT
CONSTITUENTS IN LAKE TILLERY (STATION TYB2), REACH 1 OF
THE PEE DEE RIVER (STATIONS TY1B AND TY12B), ROCKY RIVER
(STATION RR), AND THE HEADWATERS OF BLEWETT FALLS LAKE
(STATION BFH2) DURING 2004
300
250
200
cn 150
E 100
50
0
300
250
200
rn 150
E 100
50
0
300
250
200
J
a? 150
E 100
50
0
300
250
200
rn 150
E 100
50
0
300
250
200
rn 150
E 100
50
0
Banc I Illcl - LIED LIV II IJL
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
ROCKY River -5tation RR
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
--*--Surface - ?- - Bottom
Figure E-1 Monthly trends in total solids at Station TY132 in Lake Tillery, Stations TY1B
and TY12B (Generation Flow) hi Reach 1 below the Tillery Hydroelectric Plant,
Station RR in the Rocky River, and Station BFH2 located in the Blewett Falls
Lake headwaters during 2004.
?ppendix E - 1
_L
300
250
200
J
rn 150
8 100
50
0
300
250
200
J
rn 150
E 100
50
0
300
250
200
rn 150
8 100
50
0
300
250
200
J
`af 150
£ 100
50
0
300
250
200
J
rn 150
E 100
50
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River - Station TY1 B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
-surface - i- - Bottom
Figure E-2 Monthly trends in total dissolved solids at Station TYB2 in Lake Tillery,
Stations TY113 and TY12B (Generation Flow) in Reach 1 below the Tillery
Hydroelectric Plant, Station RR in the Rocky River, and Station BFH2 located
in the Blewett Falls Lake headwaters during 2004.
ppendix E - 2
A L
80
70
60
50
40
8 30
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
80
70
60
50
40
8 30
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
80
70
60
50
ai 40 AIL
8 30
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
80
70
60
50
ai 40
8 30
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
80
70
60
50
as 40
8 30
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
1-9-Surface - ?- - Bottom
Figure E-3 Monthly trends in total suspended solids at Station TY132 in Lake Tillery,
Stations TY113 and TY12B (Generation Flow) in Reach 1 below the Tillery
Hydroelectric Plant, Station RR in the Rocky River, and Station BFI-12 located
in the Blewett Falls Lake headwaters during 2004.
ppendix E - 3
A L
80
60
7
H 40
Z
20
0
80
60
t- 4 0
Z
20
0
80
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
60
F- 40
Z
20
0
80
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
60
F- 40
Z
20
0
80
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
60
I- 40
Z
20
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
--*--Surface - -- -Bottom
Figure E-4 Monthly trends in turbidity at Station TYB2 in Lake Tillery, Stations TY1B and
TY12B (Generation Flow) in Reach 1 below the Tillery Hydroelectric Plant,
Station RR in the Rocky River, and Station BFH2 located in the Blewett Falls
Lake headwaters during 2004.
ppendix E - 4
A L
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
3.00
2.50
2.00
J
rn 1.50
8 1.00
0.50
0.00
3.00
2.50
2.00
J
'af 1.50
E 1.00
0.50
0.00
3.00
2.50
2.00
m 1.50
H 1.00
0.50
0.00
3.00
2.50
2.00
J
`af 1.50
E 1.00
0.50
0.00
3.00
2.50
2.00
J
of 1.50
1.00
0.50
0.00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River - Station TY1 B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
-surface - i- - Bottom
Figure E-5 Monthly trends in total nitrogen at Station TYB2 in Lake Tillery, Stations
TY113 and TY12B (Generation Flow) in Reach 1 below the Tillery Hydroelectric
Plant, Station RR in the Rocky River, and Station BFH2 located in the Blewett
Falls Lake headwaters during 2004.
ppendix E - 5
A L
1.50
1.2 5
1.0 0
J
m 0.75
E 0.50
0.25
0.00
1.50
1.25
1.00
J
m 0.75
E 0.50
0.25
0.00
L"dKe 1 Illery -
- ?a
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
10.00
8.00
6.00
ai
E 4.00
2.00
0.00
1.50
1.25
1.00
c? 0.75
E 0.50
0.25
0.00
1.50
1.25
1.00
J
c? 0.75
E 0.50
0.25
0.00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
1-0--Surface - -- - Bottom
Figure E-6 Monthly trends in nitrate + nitrite-nitrogen at Station TY132 in Lake Tillery,
Stations TY1B and TY12B (Generation Flow) in Reach 1 below the Tillery
Hydroelectric Plant, Station RR in the Rocky River, and Station BFH2 located
in the Blewett Falls Lake headwaters during 2004.
ppendix E - 6
A L
0.25
0.20
0.15
E 0.10
0.05
0.00
0.25
0.20
0.15
E 0.10
0.05
0.00
0.25
0.20
0.15
rn
E 0.10
0.05
0.00
0.25
0.20
0.15
E 0.10
0.05
0.00
0.25
0.20
0.15
E 0.10
0.05
0.00
I akp Tillaru _ Rtntinn TYR9
M~

s
? ? ? ? r r r

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
--o-Surface - i- - Bottom
Figure E-7 Monthly trends in ammonia-nitrogen at Station TYB2 in Lake Tillery, Stations
TY1B and TY12B (Generation Flow) in Reach 1 below the Tillery Hydroelectric
Plant, Station RR in the Rocky River, and Station BFH2 located in the Blewett
Falls Lake headwaters during 2004.
ppendiY E - 7
A L
1.2 5
1.0 0
t4 0.75
rn
E 0.50
0.25
0.00
1.25
1.00
0.75
a?
E 0.50
0.25
0.00
1.25
1.00
0.75
E 0.50
0.25
0.00
1.25
1.00
t4 0.75
rn
E 0.50
0.25
0.00
1.25
1.00
0.75
rn
E 0.50
0.25
0.00

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
--?--surface - ?- - Bottom
Figure E-S Monthly trends in total phosphorus at Station TYB2 in Lake Tillery, Stations
TY113 and TY12B (Generation Flow) in Reach 1 below the Tillery Hydroelectric
Plant, Station RR in the Rocky River, and Station BFI-12 located in the Blewett
Falls Lake headwaters during 2004.
ppendix E - 8
A L
8.0
6.0
rn 4.0
E
2.0
0.0
8.0

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
6.0
cm 4.0
E
2.0
0.0
8.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
6.0
ai 4.0
E
2.0
0.0
8.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
6.0
rn 4.0
E
2.0
0.0
8.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
6.0
rn 4.0
E
2.0
0.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
1--o-surface, - i- - Bottom
Figure E-9 Monthly trends in total organic carbon at Station TYB2 in Lake Tillery,
Stations TY1B and TY12B (Generation Flow) in Reach 1 below the Tillery
Hydroelectric Plant, Station RR in the Rocky River, and Station BFH2 located
in the Blewett Falls Lake headwaters during 2004.
ppendix E - 9
A L
APPENDIX F
MONTHLY TRENDS IN SOLIDS, TURBIDITY, AND NUTRIENT
CONSTITUENTS IN BLEWETT FALLS LAKE (STATION BFB2) AND
REACH 2 OF THE PEE DEE RIVER (STATIONS BFOB, BF1B, BF2B,
BF3B, AND BF4B) DURING GENERATION FLOWS IN 2004
150
125
100
J
m 75
E 50
25
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
M onth
Figure F-1
150
125
100
J
m 75
E 50
25
0
150
125
100
J
m 75
E 50
25
0
150
125
100
J
m 75
E 50
25
0
150
125
100
m 75
E 50
25
0
150
125
100
J
m 75
£ 50
25
0
Blewett Falls Lake - Station BFB2
.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
M onth
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
M onth
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
M onth
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
M onth
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
M onth
+surface - i- -Bottom
Monthly trends in total solids at Station BFB2 in Blewett Falls Lake, Stations
BFOB, BF1B, BF2B, BF3B, and BF413 in Reach 2 below the Blewett Falls
Hydroelectric Plant during generation flows in 2004.
Appendix F - 1
Rlewett Falls Lake - Station RFR7
J
E
125
100
75

50 - -
25
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
150
125
100
75
50
25
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
150
125
100
J
c, 75
E 50
25
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
150
125
100
J
75
50
25
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
150
125
100
J
75
50
25
0
Pee Dee River - Station BFOB
Pee Dee River -Station BFI B
Pee Dee River - Station BF2B
Jr
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Figure F-2
150
125
100
J
a 75
E 50
25
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
1--+--Surface - ?- -Bottom
Monthly trends in total dissolved solids at Station BFB2 in Blewett Falls Lake,
Stations BFOB, BF1B, BF213, BF313, and BF4B in Reach 2 below the Blewett
Falls Hydroelectric Plant during generation flows in 2004.
Appendix F - 2
80
70
60
50
c 40
E 30
20
10
0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Figure F-3
80
70
60
50
a? 40
E 30
20
10
80
70
60
50
rn 40
E 30
20
10
0
Blewett Falls Lake - Station BFB2
Pee Dee River - Station BFOB
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
80
70
60
50
ci 40
E 30
20
10
0
80
70
60
50
a? 40
E 30
20
10
80
70
60
50
rn 40
E 30
20
10
0
Pee Dee River - Station BF2B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
--?-Surface - i- -Bottom
Monthly trends In total suspended solids at Station BFB2 in Blewett Falls Lake,
Stations BFOB, BF1B, BF213, BF313, and BF413 in Reach 2 below the Blewett
Falls Hydroelectric Plant during generation flo" s in 2004.
Appendix F - 3
100
75
50
25
0
100
75
50
25
0
100
75
Z 50
25
0
100
75
Z 50
25
0
100
75
Z 50
25
0
100
75
Z 50
25
0
6lewett Fallc Lake - Station SFB7
P. ? .
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
-?-Surface - i- -Bottom
Figure F-4 Monthly trends in turbidity at Station BFB2 in Blewett Falls Lake, Stations
BFOB, BF113, BF213, BF313, and BF413 in Reach 2 below the Blewett Falls
Hydroelectric Plant during generation flows in 2004.
Appendix F - 4
2.00
1.75
1.50
1.25
a 1.00
E 0.75
0.50
0.25
0.00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Figure F-5
2.00
1.75
1.50
1.25
g 1.00
t 0.75
0.50
0.25
0.00
2.00
1.75
1.50
1.25
1.00
E 0.75
0.50
0.25
0.00
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.00
2.00
1.75
1.50
1.25
c 1.00
E 0.75
0.50
0.25
0.00
2.00
1.75
1.50
1.25
1.00
E 0.75
0.50
0.25
0.00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River - Station BFI B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River - Station BF4B
70,
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Surface - i- -Bottom
Monthly trends in total nitrogen at Station BFB2 in Blevvett Falls Lake, Stations
BFOB, BF113, BF213, BF313, and BF4B in Reach 2 below the Blewett Falls
Hydroelectric Plant during generation flows in 2004.
Appendix F - 5
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
1.75
1.50
1.25
1.00
E 0.75
0.50
0.25
0.00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Figure F-6
1.75
1.50
1.25
ci 1.00
0.75
0.50
0.25
0.00
1.75
1.50
1.25
-4 1.00
E 0.75
0.50
0.25
0.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.00
1.75
1.50
1.25
-4 1.00
E 0.75
0.50
0.25
0.00
Blewett Falls Lake - Station BFB2

r

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River - Station BFI B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
-0-Surface - i- - Bottom
Monthly trends in nitrate + nitrite-nitrogen at Station BFB2 in Blewett Falls
Lake, Stations BFOB, BF1B, BF213, BF313, and BF413 in Reach 2 below the
Blewett Falls Hydroelectric Plant during generation flows in 2004.
Appendix F - 6
0.25
0.20
0.15
E 0.10
0.05
0.00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Figure F-7
0.25
0.20
0 15
of
E 0.10
0.05
0.00
0.25
0.20
0 15
m
E 0.10
0.05
0.00
0.25
0.20
0.15
m
E 0 10
0.05
0.00
0.25
0.20
0.15
m
E 0 10
0.05
0.00
0.25
0.20
0.15
rn
E 0.10
0.05
0.00
Blewett Falls Lake - Station BFB2
s ¦
Pee Dee River - Station BFOB
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River -Station BFI B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River - Station BF4B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
1-0-Surface - -- -Bottom
Monthly trends in ammonia-nitrogen at Station BFB2 in Blewett Falls Lake,
Stations BFOB, BF1B, BF213, BF313, and BF413 in Reach 2 below the Blewett
Falls Hydroelectric Plant during generation flows in 2004.
Appendix F - 7
0.50
0.40
0.30
E 0.20
0.10
0.00
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Figure F-8
0.50
0.40
-? 0.30
0.20
0.10
0.00
0.50
0.40
0.30
a
E 0.20
0.10
0.00
0.50
0.40
0.30
0.20
0.10
0.00
0.50
0.40
0.30
a?
E 0.20
0.10
0.00
0.50
0.40
0.30
a
E 0.20
0.10
0.00
Blewett Falls Lake - Station BFB2
4 4P
Pee Dee River - Station BFOB
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River -Station BFI B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River - Station BF2B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
1--+--Surface - -- -Bottom
Monthly trends in total phosphorus at Station BFB2 in Blewett Falls Lake,
Stations BFOB, BF1B, BF213, BF313, and BF413 in Reach 2 below the Blewett
Falls Hydroelectric Plant during generation flows in 2004.
Appendix F - 8
12.0
10.0
8.0
J
`af 6.0
E 4.0
Figure F-9
2.0
0.0
12.0
10.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
8.0
J
6.0
4.0
2.0
0.0
12.0
10.0
J 8.0
'?m 6.0
E 4.0
2.0
0.0
12.0
10.0
8.0
J
6.0
4.0
2.0
0.0
12.0
10.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River -Station BFI B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
Pee Dee River - Station BF2B
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
J 8.0
% 6.0
E 4.0
2.0
0.0
12.0
10.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
8.0
J
6.0
4.0
2.0
0.0
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Month
1-0-Surface - ?- - Bottom
Monthly trends in total organic carbon at Station BFB2 in Blelvett Falls Lake,
Stations BFOB, BF1B, BF213, BF313, and BF413 in Reach 2 below the Ble-%vett
Falls Hydroelectric Plant during generation flows in 2004.
Appendix F - 9