20030179 Ver 6_Monitoring Report_20110610 (2)

Pk Duke
Lnergye
Carolinas
June 8, 2011
Mr. John Dorney
NC Division of Water Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
HYDRO STRATEGY & LICENSING
Duke Energy Carolinas, LLC
EC12Y/526 South Church Street
Charlotte, NC 28202-1802
Mailing Address:
EC12Y/P.O. Box 1006
Charlotte, NC 28201-1006
I I C? [ N 0W[ DO
JUN ? 0 7011
DENR - WATE?2 iRL
Subject: 2010-2011 Dillsboro Hydroelectric Project's Post-Dam Removal Monitoring
Reports
Mr. Dorney:
Enclosed are three additional monitoring reports for the first year of post-dam removal
monitoring associated with the Dillsboro Project. These reports are provided as required by the
401 Water Quality Certification with Additional Comments-SECOND MODIFICATION dated
April 13, 2010, and by the "Dillsboro Dam and Powerhouse Removal Project (FERC #2602)
Water Quality and Environmental Monitoring Programs" (Duke Energy, July 2008). These
reports are in addition to the earlier biological monitoring reports (e.g., fish and macrobenthos)
submitted on February 28, 2011. If you have questions or concerns regarding these reports,
please do not hesitate to give me a call at 704/382-0805.
Sincerely,
?. lLe_ "
D. Hugh Barwick
Senior Environmental Resource Manager
Enclosures: Water Quality, Pebble Counts/Nickel, and Sediment monitoring reports
cc: Susan Wilson, NCDWQ
Kevin Barnett, NCDWQ
Roger Edwards, NCDWQ
Mark Cantrell, USFWS
Chris Goudreau, NCWRC
Phil Fragapane, Duke
DILLSBORO HYDROELECTRIC PROJECT
(FERC No. 2602)
PRE- AND POST-DAM REMOVAL
SEDIMENT MONITORING REPORT
Prepared for:
DUKE ENERGY CAROLINAS, LLC
Charlotte, North Carolina
Prepared by:
HDR ENGINEERING, INC. OF THE CAROLINAS
Charlotte, North Carolina
MAY 2011
DO 'A
DILLSBORO HYDROELECTRIC PROJECT (FERC No. 2602)
PRE- AND POST-DAM REMOVAL
SEDIMENT MONITORING REPORT
TABLE OF CONTENTS
Section Title Pate No.
EXECUTIVE SUMMARY ............................................................................................. I
1 INTRODUCTION ................................................................................................3
2 STUDY METHODOLOGY ....................................................................................5
2.1 Cross Sections and Substrate Mapping ......................................................................5
2.2 Sediment Sampling ...................................................................................................6
2.3 Bedload ....................................................................................................................7
2.4 Hydrology ................................................................................................................ 8
3 RESULTS AND DISCUSSION .............................................................................10
3.1 Pre-Removal Monitoring ........................................................................................10
3.1.1 Cross Sections and Substrate Mapping ........................................................10
3.1.2 Sediment Sampling .....................................................................................12
3.1.3 Bedload Sampling .......................................................................................13
3.2 Post-Removal Monitoring .......................................................................................14
3.2.1 Cross Sections and Substrate Mapping ........................................................14
3.2.2 Sediment Sampling .....................................................................................16
3.2.3 Bedload Sampling .......................................................................................16
4 CONCLUSIONS ................................................................................................18
5 REFERENCES ..................................................................................................19
APPENDICES
APPENDIX A - MAP OF SEDIMENT MONITORING LOCATIONS
APPENDIX B - PHOTOS
APPENDIX C - SEDIMENT MONITORING TRANSECTS AND SUBSTRATE MAPPING
APPENDIX D - SEDIMENT SAMPLE RESULTS
APPENDIX E - BEDLOAD SAMPLE RESULTS
APPENDIX F - FLOWS
i
DILLSBORO HYDROELECTRIC PROJECT (FERC No. 2602)
PRE- AND POST-DAM REMOVAL
SEDIMENT MONITORING REPORT
LIST OF TABLES
Table Title Pate No.
1 PRE- AND POST-DAM REMOVAL SEDIMENT MONITORING SCHEDULE ...............4
2 SUBSTRATE SIZE CLASSIFICATION AND CODES ......................................................6
3 DAM REMOVAL PHASE BEDLOAD RESULTS FROM FIRST QUARTER 2010 ........13
4 POST-REMOVAL PHASE YEAR 1 BEDLOAD RESULTS FOR FIRST QUARTER
2011 ...................................................................................................................................17
11
Executive Summary
This report details the quarterly sediment monitoring results at the now-decommissioned
Dillsboro Hydroelectric Project (FERC No. 2602) (the Project) for the Pre-Dam Removal Phase
and first year of Post-Removal Phase monitoring. The sediment investigation included cross-
sectional surveys, substrate mapping, and sediment grab sample analysis on a quarterly basis.
Seventeen (17) sediment monitoring transects on the Tuckasegee River were included in this
study.
The Pre-Removal Phase data collected during each of the four quarters in 2008 and during the
first quarter of 2010 documented seasonal fluctuations in scour/deposition patterns and sediment
composition on the Tuckasegee River. Cross-sectional surveys and substrate mapping were
performed at each transect on five separate occasions. Generally, Pre-Removal Phase data
indicated that the minimum and maximum cross-sectional profiles were typically within 6 inches
of each other.
As a result of dredging activities which took place in the former impoundment from July through
December 2009, Transects 14 and 15 show significant cross-sectional changes between 2008 and
the first quarter of 2010 (see Figures CPre-14 and CPre-15). These changes were expected
Cross-sectional profiles developed for comparison between the Pre- and Post-Removal Phase
document slight changes in river bed elevations at Transects 1 through 10 and Transect 17.
Generally, the surveys at these transects showed only minor changes that were typically within a
few inches of the minimum and maximum elevations recorded during the Pre-Removal Phase.
The profiles for Transects 11, 12, 14, and 15 showed the most significant changes in bed
elevation between the first and second quarters of 2010 (immediately following the removal of
Dillsboro Dam).
Changes at Transects 11 and 12 (immediately below Dillsboro Dam) are the result of new flow
distribution patterns that established after the removal of Dillsboro Dam and Powerhouse. Areas
that once had slower moving water immediately downstream from the non-functioning
1
Executive Summary
Powerhouse experienced scouring of finer sand and silt particles. At the same time, areas near
the center of the channel that had previously experienced higher concentrated flows which had
resulted in scouring of the bed, now have less concentrated flows which resulted in some
deposition of finer materials in low spots (i.e., shallow pools) along each transect.
Dredging activities immediately before dam removal uncovered a submerged natural rock ledge
that extended across the entire width of the channel approximately 100 yards upstream from
Dillsboro Dam. Once the dam was removed, the rock ledge became the predominant hydraulic
control in the area creating a natural pool on the upstream side. Transects 14 and 15 are located
upstream from the rock ledge in this `new' pool. Prior to dam removal, the finer sediments had
been removed at these two transects via dredging activities. Once the dam was removed, the
rock ledge created a backwater condition, and new sediments quickly deposited on Transects 14
and 15 bringing the bed elevation back up close to where it was before dredging took place.
Since the initial post-dam removal changes at these four transects, changes during the remainder
of the first post-removal year were relatively minor and reflective of pre-removal changes.
Prior to dam-removal, it was expected that there would be a significant drop in the water surface
elevation of the impoundment once the 12-foot-tall Dillsboro Dam was removed. However, the
presence of the natural rock ledge just upstream from the dam dampened this effect. At Transect
15 (the middle transect in the former impoundment), the difference in pre- versus post-removal
water surface elevation is six feet.
A representative sediment grab sample was also collected at each sediment monitoring transect
during the Pre-Removal Phase quarterly sampling trips to gain a better understanding of the
seasonal variability of the Tuckasegee River bed composition and compare to Post-Removal
Phase data. These data generally showed that the post-removal data were within the range
documented by the pre-removal data and have not been significantly altered by removal of
Dillsboro Dam.
2
Section 1
Introduction
The Dillsboro Hydroelectric Project (the Project), located in southwestern North Carolina on the
Tuckasegee River in Jackson County, previously included a dam, reservoir, and powerhouse at
approximately River Mile (RM) 31.6. During preparation of the Project relicensing application,
a considerable amount of information was obtained on environmental resources within the
Project. Since that time, a License Surrender Application was submitted to the FERC by Duke
Energy Carolinas, LLC (Duke Energy). The environmental resource information gathered for
the relicensing application was used by Duke Energy and HDR Engineering, Inc. of the
Carolinas (HDRIDTA) to develop a sediment monitoring program that was implemented as part
of the Dillsboro Dam removal project.
The Dillsboro Dam removal project includes a three-phase environmental monitoring effort. The
Pre-Removal Phase was used to gather baseline information on the variability of physical,
chemical, and biological processes in the Tuckasegee River prior to dam removal. To capture
seasonal effects, this phase was designed to occur the year prior to dam removal. The Pre-
Removal Phase included the relocation of downstream mussel populations to areas above the
Project with known mussel populations. Dam Removal Phase monitoring took place during the
actual dam demolition and removal period, and included water quality monitoring to document
compliance with state water quality standards during active removal operations. Post-Dam
Removal Phase monitoring was established to assess specific physical, chemical, and biological
changes in the Project area to determine when the river system has returned to background
ambient conditions.
Pre-removal monitoring began in the first quarter of 2008 when dam removal was scheduled for
the first quarter of 2009. An entire year of pre-removal data was collected before a one-year
delay in the dam removal schedule occurred. Since Duke Energy was only required to collect
one year of data prior to dam removal, sediment monitoring ceased until the final dam removal
schedule was set. Sediment monitoring resumed during the first quarter of 2010 to update
baseline data immediately prior to dam removal, which occurred from February through March
2010.
3
Section 1
Introduction
Post-removal monitoring began during the second quarter of 2010 and will continue through the
first quarter of 2013. The complete sediment monitoring schedule for the Dillsboro Dam
removal project is provided in Table 1.
TABLE 1
PRE- AND POST-DAM REMOVAL SEDIMENT MONITORING SCHEDULE
Monitorin!" Schedule

Quarter
2008' 2009 2010''3 2011 2012 2013
1 Pre -- Pre Post Post Post
(YI) (Y2) (Y3)
2 Pre Post Post Post --
('I) ('2) ('3)
3 Pre Post Post Post --
('I) ('2) ('3)
4 Pre Post Post Post --
('I) ('2) ('3)
'Pre indicates pre-dam removal monitoring.
2 Post indicates post-dam removal monitoring.
s YI, Y2, and Y3 indicates monitoring year.
This report details the sediment monitoring portion of the overall environmental monitoring
program for (1) the entire Pre-Removal Phase and (2) the first year of Post-Removal Phase. The
sediment investigation includes cross-sectional surveys, substrate mapping, and sediment grab
sample analysis on a quarterly basis, and bedload sampling on an annual basis.
4
Section 2
Studv Methodolo
2.1 Cross Sections and Substrate Mapping
This study included 17 sediment monitoring locations (transects) on the Tuckasegee River
between RM 12.2 and 32.8 (see Figure A-1 in Appendix A). The transect locations were
selected based on previous instream flow study locations, known mussel population locations,
and aquatic characterization (i.e., pool and riffle/run type aquatic habitats) including those areas
where sediment deposition would likely occur. HDRIDTA paired pool transects with riffle/run
transects to examine sediment changes and scour/deposition patterns on a seasonal basis
throughout the downstream reach. The pool transects were primarily used to document
scour/deposition patterns; whereas the riffle/run transects were located in areas typical of where
the endangered Appalachian elk toe mussel (Alasmidonta raveneliana) was found. By pairing
these two transect types, scour/deposition patterns could be readily identified and any
corresponding changes to the riffle/run transects noted. Transect 17 was selected as a control
location since Dillsboro Dam and Pond had no hydraulic impact on this upstream riverine reach.
This transect contained both pool and riffle/run elements across its cross-sectional profile.
Photos of each cross section are included in Appendix B. The numbering convention for each
photo corresponds to the sections given below (e.g., photos beginning with B3.1 were taken
during the Pre-Removal Phase and those beginning with B3.2 were taken during year one of
Post-Removal Phase).
After the 17 study locations were identified, transects were set up to establish semi-permanent
sediment monitoring locations using headpins and tailpins installed on the river bank. This
involved driving rebar or wood stakes into the bank, or nails into the base of trees. Permanent
benchmarks were also established at each transect to ensure vertical survey control. During data
collection activities, a Kevlar tag-line was strung between the bank pins to record horizontal
distance. Bank and stream bed elevations were surveyed at 2-foot horizontal increments using a
total station or auto-level. Water surface elevations (WSEs) were also measured at several
locations to capture the water surface gradient across each transect. All elevations referenced the
local benchmark that was established at each transect during setup activities. Plots of cross-
sectional profiles can be found in Appendix C.
5
Section 2
Study Methodology
Dominant substrate type along each transect was recorded at 2-foot horizontal increments during
each quarterly monitoring event using visual and/or tactile techniques. Classification was in
accordance with the substrate size classification system previously approved by the North
Carolina Department of Environment and Natural Resources (Table 2). Attempts were made to
conduct monitoring under the lowest flow conditions possible to provide the safest wading
conditions and highest visibility for identifying substrate. Many of the deeper pools were not
wadeable even under the lowest flow conditions. In these cases, substrate was identified and
recorded using an inflatable kayak and telescoping probe.
TABLE 2
SUBSTRATE SIZE CLASSIFICATION AND CODES
Description Inches
Organic Detritus N/A
Silt, Clay <0.1
Sand <0.1
Small Gravel 0.1-0.5
Medium Gravel 0.5-1.5
Large Gravel 1.5-3.0
Small Cobble 3.0-6.0
Large Cobble 6.0-12.0
Small Boulder 12.0-36.0
Large Boulder >36.0
Smooth Bedrock N/A
Irregular Bedrock N/A
2.2 Sediment Sampling
A representative sediment grab sample was collected at each of the 17 transects during most of
the Pre-Removal Phase quarterly sampling trips. Samples were collected in an attempt to
quantify smaller particle sizes (<3 in) across each transect. The grab samples were collected
from the surface of the riverbed and analyzed by Summit Laboratories, an AASHTO R18
accredited geotechnical laboratory located in Fort Mill, South Carolina. The sediment grab
6
Section 2 Study Methodology
samples were tested in accordance with ASTM D 422 (without hydrometer) to obtain a particle
size distribution. Particle size distribution graphs and fractional components charts for the 17
transects are located in Appendix D.
2.3 Bedload
Bedload (i.e., the particles of sediment that are transported along the bottom of a streambed) was
sampled using a Helley-Smith hand-held sediment sampler with a 3-inch by 3-inch opening and
3.22 expansion ratio chamber (Rickly 2009). The bedload sampling method was taken from the
USGS, "Field Methods for Measurement of Fluvial Sediment". The Single Equal Width
Increment (SEWI) methodology was the chosen sampling technique for this field effort because
this is the method that the USGS recommends for capturing varying bedload transport rates
along a cross-sectional profile (Edwards and Glysson 1999).
Three transects were chosen for bedload sampling: two downstream from Dillsboro Dam and
one upstream of the dam. Bedload monitoring location 1 (BL-1, see Figure A-1) was set up
immediately below the confluence of Scott's Creek and the Tuckasegee River. BL-1 was chosen
to measure sediment input from Scott's Creek in addition to the mainstem of the Tuckasegee
River. BL-2 was established at sediment monitoring Transect 12. BL-3 was located upstream
from the dam at sediment monitoring Transect 17. The upstream transect served as a control to
document background bedload transport rates.
Each transect was divided into approximately 20 equal sections (verticals). The center of each
vertical was sampled for an equal length of time across the transect yielding 20 sampling points
per transect per pass. All sample points were combined, creating a composite sample for each
transect pass. Two consecutive sampling passes were conducted on each transect, yielding two
independent bedload monitoring samples. Each bedload sample had the dry weight and sieve
analysis performed by Summit Engineering, Inc. Particle size distribution was determined using
a standard sieve analysis (similar to that used on the sediment grab samples). Bedload data is
located in Appendix E.
7
Section 2
Study Methodology
The dry weight of each sample was used to calculate the tons of bedload sediment transported
across the cross-section in tons per day (tpd). Because bedload sediment transport rate is not
consistent over time, results from the two replicate samples at each transect were combined to
determine a mean sediment transport rate for each transect. The equation for determining
transport rate is as follows:
QB = K(WT/tT)MT
Where:
QB = bedload transport in tons per day
K = conversion factor used to convert grams per second per foot into tons per day per
foot and based on the width of the bedload sampler nozzle
WT = total width of the transect
tT = total time the sampler is on the bed
MT = the total weight in grams per transect pass.
2.4 Hydrology
Flows in the Tuckasegee River play a significant role in the transport of sediment. Knowing
when high flow events occur between quarterly sampling trips provides an understanding of the
seasonal variability. The daily flows during the Pre-Removal Phase and the first year of the
Post-Removal Phase were recorded at several U. S. Geological Survey stream flow measuring
gauges. These stream gauges include:
¦ USGS Gauge 03508050 Tuckasegee River at SR 1172 near Cullowhee, NC;
¦ USGS Gauge 03510577 Tuckasegee River at Barker's Creek, NC;
¦ USGS Gauge 03512000 Oconaluftee River at Birdtown, NC; and
¦ USGS Gauge 03513000 Tuckasegee River at Bryson City, NC.
Graphs of flow versus time for the Pre-Removal Phase at the four gauges used in this study are
shown in Figures F3.1-1 through F3.14 in Appendix F. The Post-Removal Phase flows at these
8
Section 2
Study Methodology
gauges are presented by years in Figures F3.2.1-1 through F3.2.1-4. The dates of monitoring are
displayed with a red marker along the x-axis.
9
Section 3
Results and Discussion
3.1 Pre-Removal Monitoring
3.1.1 Cross Sections and Substrate Mapping
The Pre-Removal Phase provides baseline data that will be used to compare with similar data
collected during the Post-Removal Phase. This comparison will be used to identify any effects
stemming from the removal of Dillsboro Dam on scour/deposition and sediment composition in
the Tuckasegee River.
Data collected during each of the four quarters in 2008 Pre-Removal Phase document seasonal
fluctuations in cross-sectional profiles and sediment composition on the Tuckasegee River.
Once the dam removal schedule was set, a final pre-removal set of data was collected during the
first quarter of 2010 to compare with the natural seasonal variability established by the 2008
data.
High flow conditions and cold temperatures during the first quarter of 2010 created safety
concerns that resulted in data collection at only 11 of the original 17 transects. In addition,
during dam removal preparations, Transect 13 (lower Dillsboro Pond) was permanently
disturbed and not re-established for the Post-Removal Phase.
Cross-sectional surveys and substrate mapping were performed on five separate occasions during
the Pre-Removal Phase. These cross-sectional profiles are summarized in Figures CPre-1
through CPre-17 in Appendix C. The solid line on these charts illustrate the cross-sectional
profiles with substrate identification from the fourth quarter of 2008 for Transects 1, 2, 3, 4, 7,
and 13. The fourth quarter of 2008 was the last time that these six transects were surveyed
during the Pre-Removal Phase because of safety concerns with data collection during the first
quarter of 2010. The solid line on the charts which correspond to Transects 5, 6, 8, 9, 10, 11, 12,
14, 15, 16, and 17 illustrates the cross-sectional profiles and substrate identification from the first
quarter of 2010 (the last monitoring performed during the Pre-Removal Phase). Each chart also
includes the range of minimum and maximum depth from the four quarters of 2008 data.
10
Section 3 Results and Discussion
The variations in the cross-sectional profiles document only slight changes in riverbed elevation
at most transects. Generally, Pre-Removal Phase data shows that the minimum and maximum
profiles are typically within 6 inches of each other. This variability indicates that most points
along the individual transects are consistent across seasons. For transects with angular bedrock
substrate that must be surveyed using a boat, elevation differences of up to two feet can result
from being slightly upstream or downstream of the exact cross section stationing. These
differences are incorporated into the minimum and maximum range of the Pre-Removal Phase
cross-sectional profiles.
Transects 5, 9, 10, and 11 each contain portions of the cross section where the bed elevation
changes by as much as 2 feet due to scour and/or deposition. These transects are mostly in pools
or just downstream of the dam. Transect 5 has an eddy that creates a deposition zone along the
right ascending bank. A vegetated sand deposit has increased the left ascending bank at Transect
9 by 2 feet between the fourth quarter of 2008 and the first quarter of 2010. The inside bend (left
ascending bank) at Transect 10 has shown both deposition and scour during the Pre-Removal
Phase as a result of normal seasonal fluctuations.
Only minor changes were observed for transects in Dillsboro Pond during 2008. In preparation
for the dam removal, dredging occurred in the reservoir from July through December 2009. The
first quarter 2010 profile for Transects 14 and 15 (lower middle and upper middle Dillsboro
Pond) showed a maximum depth approximately 8 feet lower than any profile during 2008.
Figures CPre-14 and CPre-15 illustrate the effect of dredging on the Dillsboro Pond bed
elevation.
Transect 17, which serves as the upstream control monitoring location, has a sandbar near the
middle portion of the transect that has undergone both scour and deposition during the Pre-
Removal Phase (see Figure CPre-17). This transect contains both riffle/run and shallow pool
habitat and changes in scour and deposition at this monitoring location are indicative of normal
variations due to seasonal and flow fluctuations. As such, it provides a good reference to
compare with changes in the downstream sediment monitoring transects.
II
Section 3 Results and Discussion
3.1.2 Sediment Sampling
The Pre-Removal Phase monitoring included grab samples at each transect for the four quarters
in 2008. Grab samples for the first quarter of 2010 were collected at all transects except
Transects 1, 2, 3, 4, 7, 13, and 14 due to high flow conditions and cold temperatures. The pre-
removal data provides the baseline for Post-Removal Phase monitoring data comparison. Data
from the five Pre-Removal Phase sampling trips have been included as Figures DPre-1 through
DPre-34 in Appendix D.
During the Pre-Removal Phase, pool transects typically contained a high percentage of medium-
and fine-grained sand. The sediment from Transects 13 through 16 (Dillsboro Pond) had a
balanced mix of gravel and sands at the upper transect (16) and a high percentage of fine sand
with silt and clay just upstream from the dam (13). This pattern is typical of sediment deposition
behind dams, where larger particles fall out in the upper end of the impoundment as velocities
first start to decrease.
Prior to the removal of Dillsboro Dam, dredging removed more than 58,000 cubic yards of
material. The impact of dredging can best be seen at Transect 15 on Figure DPre-30, which
shows less fine sands and fines (silts and clays) in the first quarter of 2010 compared to the
fourth quarter of 2008. Dredging removed the smaller sized sediment particles and exposed the
larger sediment below, changing the fractional component distribution of both T-15 and T-16.
Pool transects downstream of Dillsboro Dam generally had a similar particle size distribution
with slight variation between the seasons throughout the Pre-Removal Phase. Transects 3, 5, 8,
and 10 contained mostly medium and fine sands. Transects 2 and 12 had higher percentages of
coarse and fine gravel, and lower percentages of fine sand than the other pool transects.
Riffle/run transects can be divided into two different groups: one where the proportion of gravels
and sands are approximately equal and the other where sand is the dominant substrate type with a
smaller proportion of gravel. The Pre-Removal Phase sediment samples collected at Transects 1,
12
Section 3 Results and Discussion
6, 7, and 9 had an approximately equal percentage of gravels and sands. Whereas, sediment
samples from Transects 4, 11, and 17 were primarily sands with some gravel.
3.1.3 Bedload Sampling
Bedload sampling occurred on two different days during the final stages of Dillsboro Dam
removal activities. Bedload Monitoring Location 2 (BL-2) was sampled on February 26, 2010.
Bedload Monitoring Locations 1 and 3 (BL-1 and BL-3) were sampled on March 5, 2010. Table
3 provides bedload sampling results made at the three bedload monitoring locations and
corresponding flow from the time of the bedload monitoring. The flow recorded at USGS Gage
3510577 Tuckasegee River at Barker's Creek, NC (drainage area = 360 square miles) was
prorated upstream to the former Dillsboro Dam (drainage are = 290 square miles) based on a
ratio of the two drainage areas. The prorated flows at the times of bedload monitoring are shown
in Table 3. Daily sediment transport rates were calculated for each pass and averaged for
comparison because of the variability between the two samples collected.
TABLE 3
DAM REMOVAL PHASE BEDLOAD RESULTS FROM FIRST QUARTER 2010
Prorated Flmi
Transect (pass)
[Sediment Transectl
Sample Wei!-ht (!?) Sediment Transport
Rate (tp(1) Mean Transport
Rate (tp(1) at former
Dillsboro Dam
(cfs)
BL-1 (A) 347.0 35.2
28
4 1
170
. ,
BL-1 (B) 211.5 21.5
BL-2 (A) [T-12] 250.3 17.5
30
9 570
.
BL-2 (B) [T-12] 635.3 44.4
BL-3 (A) (control) [T-17] 138.4 19.8
19
0 1
160
. ,
BL-3 (B) (control) [T-17] 128.4 18.3
During dam removal activities, it appears that downstream sediment transport rates were greater
than that measured at the upstream control. The downstream sediment transport rates during this
period were not only a function of river flow, but also daily dam removal activities and any
residual sediment that may have been left in the pond after dredging activities ceased. This
13
Section 3 Results and Discussion
could explain why the downstream sediment transport rate at a flow of 570 cfs was similar to
that at a flow of 1,170 cfs. In the absence of dam removal activities and residual sediment, one
would expect that the transport rate would decrease as flow decreases. The results from the
bedload samples in 2010 are plotted with the post-removal bedload sample results in Figure
E3.2.1-1 through E3.2.1-6 in Appendix E. Medium and fine sands were the dominant sediment
types collected at all three transects. Coarse sand and fine gravel were present in the samples in
small percentages. Silt and clay did not makeup a large portion of the samples due to the size of
the standard mesh collection bag (250 microns).
3.2 Post-Removal Monitoring
3.2.1 Cross Sections and Substrate Mapping
Data was collected quarterly at each cross section during the first year of the Post-Removal
Phase and has been plotted as Figures CPost.Q2.2010-1 through CPost.Q1.2011-16 in Appendix
C. The numbering convention for each figure corresponds to the phase of the project and the
quarter and year collected (e.g., figures beginning with CPost.Q2.2010 correspond to data
collected during the second quarter 2010 and those beginning with CPost.Q3.2010 correspond to
data collected during the third quarter of 2010). For comparison, these plots also include the
minimum and maximum composite cross-sectional profiles collected during the Pre-Removal
Phase.
Post-removal cross-sectional profiles show small seasonal changes in river bed elevations at
most transects. The exceptions to this are Transects 2 and 7 in which the variability in bed
elevation is due to surveying difficulties at cross sections which contain large boulders and/or
irregular bedrock. This makes surveys difficult to repeat as the placement of the survey rod just
a few inches to the left or right of a particular station interval could cause up to a 2 foot change
in elevation depending the size and shape of the substrate. Generally, the surveys show that
changes are typically within a few inches of the pre-removal minimum and maximum elevations.
Low flows were observed during most of the second, third, and fourth quarters of 2010,
allowing sediment to build up along several transects until the next high flow event scoured the
14
Section 3 Results and Discussion
profile to the pre-removal levels. Variability in the cross-sectional profiles at Transects 1
through 10 remained mostly within the pre-removal ranges.
The cross-sectional profiles at Transects 11, 12, 14, and 15 show changes in bed elevation
between the first and second quarters of 2010 (immediately following the removal of Dillsboro
Dam). Changes at Transects 11 and 12 (immediately below Dillsboro Dam) are the result of new
flow distribution patterns that established after the removal of Dillsboro Dam and Powerhouse.
Areas that once had slower moving water immediately downstream of the non-functioning
Powerhouse experienced scouring of finer sand and silt particles. At the same time, areas near
the center of the channel that had previously experienced higher concentrated flows resulting in
scour, now have less concentrated flows which resulted in some deposition of finer materials in
low spots (i.e., shallow pools) along each transect.
The profiles for Transects 14 and 15 (former Dillsboro Pond) depict deposition up to 7 feet on
the second quarter 2010 plots. A rock ledge exposed after the dam removal created a backwater
condition that filled in the dredged area in the former impoundment. The elevation of the bed is
close to where it was before the dredging took place.
Transect 15 was the only cross section that showed noticeable change from the second quarter of
2010 to first quarter of 2011. The right half of the transect which consisted of gravel and sand
scoured approximately 1 foot between the fourth quarter of 2010 and first quarter of 2011. This
is the most significant change that has occurred in the former Dillsboro Pond since the initial
changes observed immediately following dam removal. The other profile data for these cross
sections indicates that differences were within a few inches of the previous quarter.
Transect 17 experienced seasonal, flow-related scour and deposition patterns at the center
channel sandbar similar to that experienced during the Pre-Removal Phase. The cobble/gravel
area on the left ascending bank and bedrock section on the right ascending bank remain within
the narrow pre-removal range.
15
Section 3 Results and Discussion
3.2.2 Sediment Sampling
Particle size distribution graphs and fractional component charts for each of the 16 current
transects monitored during the first year of Post-Removal Phase are Figures DPost.Q2.2010-1
through DPost.Q1.2011-32 located in Appendix D. The minimum and maximum data from the
Pre-Removal Phase has been included in these figures for comparison. In addition, the fractional
component charts have the previous quarter data on all but the second quarter 2010 charts.
The sediment distribution for Transect 17 remained within the pre-removal levels for the entire
first year of post-removal monitoring. The former Dillsboro Pond generally had larger-sized
sediment particles compared to before the dam was removed. While Transect 16 remained
within the pre-removal levels, sample distributions for Transects 14 and 15 had increased
percentages of fine gravel, coarse sand, and medium sand (and smaller amounts of fine sand).
Post-removal sediment distributions below the former dam location (Transects 1 through 12)
typically remained within the pre-removal levels. Seasonal flows (i.e. large runoff events and
long periods of low flow) on the Tuckasegee River typically only affected the percentage of
smaller particle sizes at each of the downstream transects. Whenever this happened, the overall
sediment distribution usually returned to pre-removal levels by the following quarter. Since the
control transect and the downstream transects only exhibited minor sediment composition
changes that were within the pre-removal bounds, the changes were more likely the result of
natural seasonal variation and not caused by the removal of Dillsboro Dam.
3.2.3 Bedload Sampling
Post-removal bedload sampling occurred during the first quarter of 2011 on March 24. Table 3
provides bedload sampling results from the three monitoring locations and corresponding
prorated flows from USGS Gage 3510577 Tuckasegee River at Barker's Creek, NC. Daily
sediment transport rates were calculated for each pass and averaged for comparison as done for
pre-removal data.
16
Section 3 Results and Discussion
TABLE 4
POST-REMOVAL PHASE YEAR 1 BEDLOAD RESULTS FOR FIRST QUARTER 2011
Prorated Flmi at
Transect (Pass) Sample weight Sediment Transport Mean Transport Former
[Sediment Transectl O Rate (tp(1) Rate (tp(1) Dillshoro Dam
(cfs)
BL-1 (A) 289.6 18.4
12
0 420
.
BL-1 (B) 87.7 5.6
BL-2 (A) [T-12] 149.8 13.8
21
6 420
.
BL-2 (B) [T-12] 319.8 29.4
BL-3 (A) (control) [T-17] 143.9 13.5
11
2 450
.
BL-3 (B) (control) [T-17] 96.0 9.0
In general, the first year post-removal bedload transport rates are lower than those during the
active removal period. This is due, at least in part, to the lower overall flow rate during the post-
removal sampling period (420 - 450 cfs post-removal versus 570 - 1,170 cfs during active
removal). Sediment transport rates immediately below the Dillsboro Dam location (BL-2) are
still higher than at the control location. This may be indicative of residual sediments still making
their way out of the former impoundment, or it could be due to sampling variability between the
monitoring locations. Future monitoring efforts may shed some light on the differences in
transport rates between the control and downstream monitoring locations. The results from the
sieve analyses of dam removal samples in 2010 and 2011 are plotted as Figure E3.2.1-1 through
E3.2.1-6 in Appendix E. Medium and fine sands remained the dominant sediment types
collected at all three transects in 2011. Samples did show variation between individual transect
passes within sediment classifications as expected. Mean particle size distributions for BL-1 and
BL-2 showed a shift towards smaller grain sizes in 2011, while the Sample 3 mean particle size
distribution was relatively similar between years.
17
Section 4
Conclusions
The pre- and post-dam removal sediment monitoring revealed that the most significant changes
in channel characteristics due to dam removal activities occurred in the former Dillsboro Pond
and the reach just below the former Dillsboro Dam. Bed elevations in the former Dillsboro Pond
decreased up to eight feet during dredging activities in preparation for dam removal. Following
dam removal, the sediment deposited in the dredged area was more than expected due to the
exposed rock ledge. The rock ledge created a pool in the former impoundment where sediment
deposition had returned the bed to near pre-removal levels. The rock ledge also appears to be the
cause of the water surface elevation in the former Dillsboro Pond dropping only about six feet at
Transect 15 after Dillsboro Dam was removed.
The removal of Dillsboro Dam and Powerhouse changed the flow distribution patterns
immediately below the dam. Areas that once had slower moving water immediately downstream
of from the non-functioning Powerhouse experienced scouring of finer sand and silt particles.
Areas near the center of the channel that previously experienced higher concentrated flows now
have less concentrated flow which resulted in the deposition of finer materials in low lying
regions along each transect.
Sediment grab sample results indicated that transects in the former impoundment have more
gravel in the upper layer of the bed than observed during the Pre-Removal Phase. The control
and downstream transects exhibited minor sediment composition changes that were within the
pre-removal bounds. Hence, the changes were more likely the result of natural seasonal
variation and not caused by the removal of Dillsboro Dam.
Bedload transport rates were lower during post-removal sampling, partially due to lower river
flows. Higher sediment transport rates immediately below the Dillsboro Dam location (BL-2)
may be indicative of residual sediments from the former impoundment or sampling variability
between the monitoring locations. Additional data from 2012 sampling may shed some light on
the differences in transport rates between the control and downstream monitoring locations.
18
Section 5
References
Edwards, T. K. and G. D. Glysson. 1999. USGS Field Methods for Measurement of Fluvial
Sediment. USGS, Reston, Virginia. pp 97.
Rickly Hydrological Company. 2009. "Sediment Sampling." [Online] URL:
http://www.rickly.com/ss/sediment_sampling.htm (Accessed October 22, 2010).
19
APPENDICES
APPENDIX A
MAP OF SEDIMENT MONITORING LOCATIONS
DUKE ENERGY
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ill aro Dam

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APPENDIX B
PHOTOS
PRE-REMOVAL MONITORING
Appendix B - I

Appendix B - 2

,V,

x .

Photo B3.1-4: Transect 4
Appendix B - 3

Photo B3.1-3: Transect 3
a s Wit` ??. «? "F
Photo B3.1-5: Transect 5
Photo B3.1-6: Transect 6

Appendix B - 4

Photo B3.1-8: Transect 8
Appendix B - 5

F

Photo B3.1-9: Transect 9

F«
il»
0
Photo B3.1-10: Transect 10
Appendix B - 6

3
? .:
4 moo. ?F .n $ ?_

Photo B3.1-11: Transect 11

Photo B3.1-12: Transect 12

Appendix B - 7

h4
Appendix B - 8

Photo B3.1-16: Transect 16
Appendix B - 9

i
'-'sane r :.

4

,

V
%07?
i

Photo B3.1-17: Transect 17
Appendix B - 10
POST-REMOVAL MONITORING
YEAR ONE
Appendix B - I I
Photo B3.2-1: Transect 1
tea.::..: ? F ? •..
Photo B3.2-2: Transect 2

Appendix B - 12

Photo B3.2-4: Transect 4
Appendix B - 13
Photo B3.2-5: Transect 5
Photo B3.2-6: Transect 6

Appendix B - 14
Photo B3.2-8: Transect 8

Appendix B - 15
Photo B3.2-9: Transect 9

Photo B3.2-10: Transect 10
Appendix B - 16
x M
..x tae. ... .. •£
7F
Photo B3.2-12: Transect 12
Appendix B - 17

Photo B3.2-13: Transect 14

Photo B3.2-14: Transect 15
Appendix B - 18

Photo B3.2-15: Transect 16

F-I - 'nos 4 ...
Photo B3.2-16: Transect 17

Appendix B - 19
APPENDIX C
SEDIMENT MONITORING TRANSECTS AND SUBSTRATE MAPPING
PRE-REMOVAL MONITORING
Appendix C - I
FIGURE CPRE-1
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-1 Bryson City Riffle
89
88
87
86
m
85
d
ca
L 84
C
83
ca
d
w 82
81
80
79
Appendix C - 2
0 20 40 60 80 100 120 140 160 180 200 220 240 260
Distance (ft)
FIGURE CPRE-2
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-2 Bryson City Pool
97
96
95
94
93
m 92
0
d 91
ca
m 90
c 89
0
ca
88
w
87
86
85
84
83
0
20 40 60 80 100 120
Distance (ft)
140 160 180 200 220 240
Appendix C - 3
FIGURE CPRE-3
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-3 Ferguson Field Pool
101
100
99
98
97
m 96
0
95
Z
ca
L 94
c 93
}0
ca
'
d 92
w
91
90
89
88
87
0
Appendix C - 4
20 40 60 80 100 120 140 160 180 200 220 240
Distance (ft)
FIGURE CPRE-4
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-4 Cherokee Riffle
100
99
98
97
96
2
m
95
d
Z 94
ca
m
93
c
0
92
d
w 91
90
89
88
87
------------------------------------------------------------------------------------------------- ------------------------------------- --------------------
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal
1 ?
I
1 1
I

0 15 30 45 60 75 90
Distance (ft)
105 120 135 150 165
Appendix C - 5
FIGURE CPRE-5
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-5 Barker's Creek Pool
100
99
98
97
E
CO 96
0
95
L
tF
94
0
c?
93
w
92
91
90
89
0
10 20 30 40 50 60 70
Distance (ft)
80 90 100 110 120 130
Appendix C - 6
FIGURE CPRE-6
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-6 Barkers Creek Riffle
101
100
99
m
98
0
d
a
L
0
a
d
97
96
w
95
94

Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min 2008
a
,
,
,

,
,
,
,
,
,
,

0 20 40 60 80 100 120
Distance (ft)
140 160 180
Appendix C - 7
FIGURE CPRE-7
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-7 Gorge Riffle
99
98
97
96
m
0
95
0 94
iu
w 93
92
91
90
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal -
f,
I
I
I
1II I
,1 I
I
I
I, , I
I
I
I
, I
,
I,
I,
II I,
,
0 20 40 60 80 100 120 140
Distance (ft)
Appendix C - 8
FIGURE CPRE-8
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-8 Gorge Pool
99
98
97
96
95
94
CO 93
0
92
91
L
t90
c
0 89
w 88
87
86
85
84
83
82
Appendix C - 9
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Distance (ft)
FIGURE CPRE-9
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-9 Hotel Riffle
101

Boulder/Bed rock
Cobble

100 Gravel
Sand
a Silt/Organic
99 Water Surface
Max/Min 2008
--
98

CO
97

>
M
96
L 1 ? 1 1
? , 1 1
c
95
0
;
+
r
> 1
w 94

93
,

-
92

91
1

90
0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 10
FIGURE CPRE-10
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-10 Hotel Pool
101
100
99
98
97
m 96
0
95
c?
94
c
0 93
c?
w 92
91
90
89
88
87
0
Appendix C - 11
10 20 30 40 50 60 70 80 90 100 110 120
Distance (ft)
FIGURE CPRE-11
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-11 Pool Below Dillsboro Dam
102
101
100
99
2
m
98
d
ca
L 97
c
° 96
ca
d
w 95
94
93
92
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min 2008
0 20 40 60 80 100
Distance (ft)
120 140 160 180 200
Appendix C - 12
FIGURE CPRE-12
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-12 Riffle Below Dillsboro Dam
102
101
100
99
2
m
98
d
ca
L 97
96
a
w
95
94
93
92
- --------------------------------------------------------------------------------------------------------------------------------------------------------- -------------------------------------- ------------------------------------------------------------------------ ----------------------------------------------
I
Boulder/Bedrock
Cobble

Gravel
Sand
° Silt/Organic
Water Surface
Max/Min 2008
I
I

0 20 40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 13
FIGURE CPRE-13
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-13 Lower Pond
98
97
96
95
94
93
co
0
92
f° 91
90
c
0
89
w 88
87
86
85
84
83
........ ........ ......... ......... .. ....... ......... ......... ......... ......... ......... ......... ......... Boulder/Bedrock

Cobble
G
l .........
.......................
rave
Sand
Silt/Organic

Water Surface
Max/Min Pre-Removal ;
;

41 /1

0 20 40 60 80 100 120
Distance (ft)
140 160 180
Appendix C - 14
FIGURE CPRE-14
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-14 Lower Middle Pond
95
94
93
92
91
E 90
co
89
ca 88
m
L
87
0
M 86
iu
w 85
84
83
82
81
80
- Boulder/Bedrock
Cobble
Gravel
'

" Sand

Silt/Organic
„
- Water Surface
Unknown
Max/Min 2008 „

i

0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 15
FIGURE CPRE-15
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-15 Upper Middle Pond
95
94
93
92
91
90
m
0
89
0
88
L
t-- 87
0
ca 86
0
w 85
84
83
82
81
80
0

Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic ;
Water Surface
m Max/Min 2008
20
40
60 80 100 120 140 160
Distance (ft)
Appendix C - 16
FIGURE CPRE-16
Tuckasegee River
Pre-Dam Removal Monitoring
Transect T-16 Upper Pond
97
96
95
94
93
m 92
0
91
90
L
r 89
0
> 88
2
w
87
86
85
84
83

Boulder/Bedrock

' Cobble
Gravel
S
d
an
Silt/Organic
Water Surface
Max/Min 2008
4
5

I

- - - - - - - - - - - -

0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 17
FIGURE CPRE-17
Tuckasegee River
Pre-Dam Removal Monitoring
TransectT-17 Uppermost Riffle
99
98
97
F 96
m
0
> 95
a
L
$ 94
O
w 93
92
91
90
- --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------- ----------------------------
Boulder/Bedrock
- - Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min 2008

11

0 25 50 75 100 125 150
Distance (ft)
175 200 225 250
Appendix C - 18
POST-REMOVAL MONITORING
YEAR ONE
SECOND QUARTER 2010
Appendix C - 19
FIGURE CPOST.Q2.2010-1
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-1 Bryson City Riffle
89
88
87
86
m
85
d
ca
L 84
C
83
ca
d
w
82
81
80
79
Appendix C - 20
0 20 40 60 80 100 120 140 160 180 200 220 240 260
Distance (ft)
FIGURE CPOST.Q2.2010-2
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-2 Bryson City Pool
97
96
95
94
93
m 92
0
d 91
ca
m 90
c 89
0
ca
88
w
87
86
85
84
83
0
20 40 60 80 100 120
Distance (ft)
140 160 180 200 220 240
Appendix C - 21
FIGURE CPOST.Q2.2010-3
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-3 Ferguson Field Pool
101
100
99
98
97

CO 96
0
95
M
94
0 93
c?
w 92
91
90
89
88
87
0
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------- ---------------------------------------

- Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal

it
it

,

20 40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 22
FIGURE CPOST.Q2.2010-4
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-4 Cherokee Riffle
100
99
98
97
96
2
m
0 95
d
94
ca
m
93
c
0
92
d
w 91
90
89
88
87
--------------- --------------------------------------------------------------------------------- ----------------------------------- ----------------------
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal
,

0 15 30 45 60 75 90
Distance (ft)
105 120 135 150 165
Appendix C - 23
FIGURE CPOST.Q2.2010-5
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-5 Barker's Creek Pool
100
99
98
97
E
CO 96
0
95
L
tF
94
0
c?
w 93
92
91
90
89
0
10 20 30 40 50 60 70
Distance (ft)
80 90 100 110 120 130
Appendix C - 24
FIGURE CPOST.Q2.2010-6
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-6 Barkers Creek Riffle
101
100
99
m
98
0
d
a
m
L
0
ca
d
97
96
w
95
94
---------------------------------------------------------------------------------------------------- ------------------------------------ ------------------
Boulder/Bedrock
Cobble
Gravel
Sand

Silt/Organic
Water Surface ;
n Max/Min Pre-Removal

II
I
I
I
I
I
1
I ,

too
0 20 40 60 80 100 120
Distance (ft)
140 160 180
Appendix C - 25
FIGURE CPOST.Q2.2010-7
0 20 40 60 80 100 120 140
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-7 Gorge Riffle
99
98
97
96
m
0
1 `
1 `
95 -
f4 ` 1
1 1
L ` 1
IH 1 ` I
0 94
c?
w 93 -
92 y
91
90
Distance (ft)
Appendix C - 26
FIGURE CPOST.Q2.2010-8
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-8 Gorge Pool
99
98
97
96
95
94
Co 93
0
92
91
L
t90
c
0 89
w 88
87
86
85
84
83
82
Boulder/Bedrock
Cobble
..........I Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Distance (ft)
Appendix C - 27
FIGURE CPOST.Q2.2010-9
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-9 Hotel Riffle
101 ....................................................................................................................................................................................................................................................................................................................................................................... ................................... ............................................................................................................................................... ......................................................................
Boulder/Bedrock
Cobble

100
M ------ Gravel
Sand
Silt/Organic
99 Water Surface
Max/Min Pre-Removal
-
98

CO -
97

>
96
L
1
,
c
95
o - ,
-
2 94
w
- ? 1
93
92 ----- -
'
1

91

90
0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 28
FIGURE CPOST.Q2.2010-10
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-10 Hotel Pool
101
100
99
98
97
m 96
0
d 95
ca
L 94
c 93
}0
ca
'
d 92
w
91
90
89
88
87
0
Appendix C - 29
10 20 30 40 50 60 70 80 90 100 110 120
Distance (ft)
FIGURE CPOST.Q2.2010-11
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-11 Dillsboro Dam Pool
102
101
100
99
2
m
98
d
ca
L 97
c
96
a
d
w 95
94
93
92 +
0
Boulder/Bedrock
Cobble
--Gravel
"Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal
,
20 40 60 80 100 120 140 160 180 200
Distance (ft)
Appendix C - 30
FIGURE CPOST.Q2.2010-12
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-12 Dillsboro Dam Riffle
102
101
100
99
m
98
97
c
0
ca 96
iu
w
95
94
93
92
0

Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
% Max/Min Pre-Removal

20 40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 31
FIGURE CPOST.Q2.2010-13
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-14 Lower Middle Pond
95
94
93
92
91
E 90
M
89
ca 88
m
L
t87
0
ca 86
a)
U' 85
84
83
82
81
80
Distance (ft)
Appendix C - 32
0 20 40 60 80 100 120 140 160
FIGURE CPOST.Q2.2010-14
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-15 Upper Middle Pond
95
94
93
92
91
E 90
CO
0 89
88
L
t-- 87
0
ca 86
U' 85
84
83
82
81
80
Appendix C - 33
0 20 40 60 80 100 120 140 160
Distance (ft)
FIGURE CPOST.Q2.2010-15
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-16 U pper Pond
97
96
95
94
93
m 92
0
91
90
L
r 89
0
> 88
d
w
87
86
85
84
83 +
0
Appendix C - 34
20 40 60 80 100 120 140 160
Distance (ft)
FIGURE CPOST.Q2.2010-16
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-17 Uppermost Riffle
99
98
97
F 96
m
0
> 95
a
I 1
94
0
>
93 _
w
92
91
,
90
0 25 50 75 100
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
--K Max/Min Pre-Removal
,
I \,
,
rt '
,
,

,
125
Distance (ft)
Appendix C - 35
\
\
150 175 200 225 250
POST-REMOVAL MONITORING
YEAR ONE
THIRD QUARTER 2010
Appendix C - 36
FIGURE CPOST.Q3.2010-1
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-1 Bryson City Riffle
89
88
87
86
m
85
d
ca
L 84
c
° 83
ca
d
w
82
81
80
79
Appendix C - 37
0 20 40 60 80 100 120 140 160 180 200 220 240 260
Distance (ft)
FIGURE CPOST.Q3.2010-2
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-2 Bryson City Pool
97
96
95
94
93
m 92
0
d 91
ca
m 90
c 89
0
ca
88
w
87
86
85
84
83
0
20 40 60 80 100 120
Distance (ft)
140 160 180 200 220 240
Appendix C - 38
FIGURE CPOST.Q3.2010-3
Tuckasegee River
Post-Dam Removal Monitoring
TransectT-3 Ferguson Field Pool
101
100
99
98
97
m 96
0
> 95
M
94
c
0 93
c?
iu
w 92
91
90
89
88
87
0
20
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal
. All
40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 39
FIGURE CPOST.Q3.2010-4
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-4 Cherokee Riffle
100
99
98
97
2
CO
96
0 95
d
94
ca
L
$_ 93
c
0
92
d
w 91
90
89
88
87
Appendix C - 40
0 15 30 45 60 75 90 105 120 135 150 165
Distance (ft)
FIGURE CPOST.Q3.2010-5
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-5 Barker's Creek Pool
100
99
98
97
E
CO 96
0
95
L
tF
94
0
c?
w 93
92
91
90
89
0
10 20 30 40 50 60 70
Distance (ft)
80 90 100 110 120 130
Appendix C - 41
FIGURE CPOST.Q3.2010-6
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-6 Barkers Creek Riffle
101
100
99
m
d
a
L
0
ca
d
98
97
96
w
95
94

Boulder/Bedrock
Cobble
Gravel
S
d
an
Silt/Organic
Water Surface ;
Max/Min Pre-Removal "

1
1
I
1 I
1 I
1 I
I 1

I

1 1
1 I
I
I
1 I

?
I
1 ,

20 40 60 80 100 120
Distance (ft)
140 160 180
Appendix C - 42
FIGURE CPOST.Q3.2010-7
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-7 Gorge Riffle
99
98
97
96
m
0
95
L
tF
0 94
c?
w 93
92
91
90
Distance (ft)
Appendix C - 43
0 20 40 60 80 100 120 140
FIGURE CPOST.Q3.2010-8
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-8 Gorge Pool
99
98
97
96
95
94
CO 93
0
92
91
L
t90
c
0 89
w 88
87
86
85
84
83
82
Appendix C - 44
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Distance (ft)
FIGURE CPOST.Q3.2010-9
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-9 Hotel Riffle
101
100
99
98

m 97
0
96
L
4-
95
0
c?
94
w
93
92
91
90
Distance (ft)
Appendix C - 45
0 20 40 60 80 100 120 140 160
FIGURE CPOST.Q3.2010-10
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-10 Hotel Pool
101
100
99
98
97
m 96
0
95
c?
94
c
0 93
c?
w 92
91
90
89
88
87
0
Appendix C - 46
10 20 30 40 50 60 70 80 90 100 110 120
Distance (ft)
FIGURE CPOST.Q3.2010-11
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-11 Dillsboro Dam Pool
102
101
100
99
2
m
98
d
a
97
c
96
ca
w 95
94
93
92

Boulder/Bedrock
Cobble
- Gravel
Sand
Silt/Organic
Water Surface
n Max/Min Pre-Removal

1 '
_ V -

0 20 40 60 80 100 120
Distance (ft)
140 160 180 200
Appendix C - 47
FIGURE CPOST.Q3.2010-12
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-12 Dillsboro Dam Riffle
102
101
100
m
0 98
M
97
c
0
ca 96
0
w
95
94
93
92
-------------------------------------------------------------------- ---------------------------------------------------------------------------------------
Boulder/Bedrock
Cobble
-- Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal
I
I

99
0 20 40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 48
FIGURE CPOST.Q3.2010-13
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-14 Lower Middle Pond
95
94
93
92
91
90
m
89
ca 88
a)
L
t/
87
0
ca 86
iu
U' 85
84
83
82
81
80

Boulder/Bedrock

a Cobble
Gravel
S
d
an
Silt/Organic
Water Surface /
n Max/Min Pre-Removal

II ?
'I

---
- II

__ - ---
I

I
I

I
0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 49
FIGURE CPOST.Q3.2010-14
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-15 Upper Middle Pond
95
94
93
92
91
E 90
co
0 89
88
87
c
0
ca 86
iu
w 85
84
83
82
81
80
Boulder/Bedrock
'Cobble
Gravel
Sand
Silt/Organic
Water Surface

;
Max/Min Pre-Removal

-------- ------------------------

0 20 40 60 80 100
Distance (ft)
120 140 160
Appendix C - 50
FIGURE CPOST.Q3.2010-15
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-16 Upper Pond
97
96
95
94
93
m 92
91
90
L
r 89
0
> 88
2
w
87
86
85
84
83
-- --------------------------------------------------------------------------------------------- ----------------------------------- ---------------------
Boulder/Bedrock
C
bbl
o
e
Gravel
"Sand
Silt/Organic
Water Surface
„
v Max/Min Pre-Removal

„ u
n n
n u
„
u
i
„

0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 51
FIGURE CPOST.Q3.2010-16
Tuckasegee River
Post-Dam Removal Monitoring
TransectT-17 Uppermost Riffle
99
98
97
96
m
0
95
c?
0 94
w 93
92
91
90
Boulder/Bedrock
-------------------------------------------------------------------------------------------------- ----------------------------------------------------
Cobble
-- Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal
I
I
I
a
0 25 50 75 100 125 150 175 200 225 250
Distance (ft)
Appendix C - 52
POST-REMOVAL MONITORING
YEAR ONE
FOURTH QUARTER 2010
Appendix C - 53
FIGURE CPOST.Q4.2010-1
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-1 Bryson City Riffle
89
88
87
86
m
85
d
ca
L 84
c
83
ca
d
w
82
81
80
79
Appendix C - 54
0 20 40 60 80 100 120 140 160 180 200 220 240 260
Distance (ft)
FIGURE CPOST.Q4.2010-2
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-2 Bryson City Pool
97
96
95
94
93
m 92
0
d 91
ca
L 90
c 89
}0
ca
'
d 88
w
87
86
85
84
83
Appendix C - 55
0 20 40 60 80 100 120 140 160 180 200 220 240
Distance (ft)
FIGURE CPOST.Q4.2010-3
Tuckasegee River
Post-Dam Removal Monitoring
TransectT-3 Ferguson Field Pool
101
100
99
98
97
m 96
0
> 95
M
94
0 93
c?
iu
w 92
91
90
89
88
87
0

Boulder/Bedrock
Cobble
............ Gravel
Sand
Silt/Organic
Water Surface
% Max/Min Pre-Removal
I
I
I
I
I
I
I
I

20 40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 56
FIGURE CPOST.Q4.2010-4
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-4 Cherokee Riffle
100
99
98
97
2
m
0 95
d
94
ca
L
_ 93
c
0
92
d
w 91
90
89
88
87
- --------------- -------------------------------------------------------------------------------- ------------------------------------ ----------------------
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal

?
I
Af,

96
0 15 30 45 60 75 90
Distance (ft)
105 120 135 150 165
Appendix C - 57
FIGURE CPOST.Q4.2010-5
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-5 Barker's Creek Pool
100
99
98
97
E
CO 96
0
95
L
tF
94
0
c?
w 93
92
91
90
89
0
10 20 30 40 50 60 70
Distance (ft)
80 90 100 110 120 130
Appendix C - 58
FIGURE CPOST.Q4.2010-6
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-6 Barkers Creek Riffle
101
100
99
m
d
Z
ca
L
0
ca
d
98
97
96
w
95
94

Boulder/Bedrock
Cobble
Gravel
Sand

Silt/Organic
Water Surface
Max/Min Pre-Removal

?I 1
II
I ?
I
I
I
I
1 ;
I I

0 20 40 60 80 100 120
Distance (ft)
140 160 180
Appendix C - 59
FIGURE CPOST.Q4.2010-7
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-7 Gorge Riffle
99
98
97
96
m
0
95
L
tF
0 94
c?
w 93
92
91
90
Distance (ft)
Appendix C - 60
0 20 40 60 80 100 120 140
FIGURE CPOST.Q4.2010-8
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-8 Gorge Pool
99
98
97
96
95
94
CO 93
0
92
91
L
t90
c
0 89
w 88
87
86
85
84
83
82
Appendix C - 61
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Distance (ft)
FIGURE CPOST.Q4.2010-9
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-9 Hotel Riffle
101
100
99
98

m 97
0
96
L
4-
95
0
c?
94
w
93
92
91
90
Distance (ft)
Appendix C - 62
0 20 40 60 80 100 120 140 160
FIGURE CPOST.Q4.2010-10
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-10 Hotel Pool
101
100
99
98
97
m 96
0
95
c?
94
c
0 93
c?
w 92
91
90
89
88
87
0
Appendix C - 63
10 20 30 40 50 60 70 80 90 100 110 120
Distance (ft)
FIGURE CPOST.Q4.2010-11
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-11 Dillsboro Dam Pool
102
101
100
99
2
m
98
d
+,
m 97
L
0 96 .
a
d
w 95
94
93
92

Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal

'
1
1 '
1
1
1
1
1
1 '
I
,
1

,

0 20 40 60 80 100 120
Distance (ft)
140 160 180 200
Appendix C - 64
FIGURE CPOST.Q4.2010-12
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-12 Dillsboro Dam Riffle
102
101
100
m
0 98
M
97
c
0
ca 96
0
w
95
94
93
92
-------------------------------------------------------------------- ----------------------------- ------------------------------------ ----------------------
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal

I
I
I
I

99
0 20 40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 65
FIGURE CPOST.Q4.2010-13
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-14 Lower Middle Pond
95
94
93
92
91
90
m
89
ca 88
a)
L
t/
87
0
ca 86
iu
U' 85
84
83
82
81
80

Boulder/Bedrock
C
bbl
o
e
Gravel
Sand
Silt/Organic
Water Surface
;
Max/Min Pre-Removal

--__
1 /
/ f
"
I

I
I

I
0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 66
FIGURE CPOST.Q4.2010-14
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-15 Upper Middle Pond
95
94
93
92
91
E 90
co
0 89
88
L
tl
-- 87
O
ca 86
iu
w 85
84
83
82
81
80
11 ?
Boulder/Bedrock
Cobble
Gravel
Sand '
Silt/Organic
Water Surface
n Max/Min Pre-Removal
- --- //'
------ - ------------------- 1
1 ?
1 ?
1
I
0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 67
FIGURE CPOST.Q4.2010-15
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-16 Upper Pond
97
96
95
94
93
m 92
0
91
Z
90
L
89
0
> 88
2
w
87
86
85
84
83
-- ---------------------------------------------------------------------------------------------- ------------------------------------ --------------------
Boulder/Bedrock

Cobble
" Gravel
Sand

Silt/Organic
Water Surface

n Max/Min Pre-Removal

,

--- -------------

0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 68
FIGURE CPOST.Q4.2010-16
Tuckasegee River
Post-Dam Removal Monitoring
TransectT-17 Uppermost Riffle
99
98
97
96
m
0
95
M
0 94
w 93
92
91
90

------------------------------------------------------------------------------------------------
----
------- I
---------------------
Boulder/Bedrock
-
Cobble

- Gravel
Sand
Silt/Organic
Water Surface
ry Max/Min Pre-Removal

I
I
I

VIII ?

0 25 50 75 100 125 150 175 200 225 250
Distance (ft)
Appendix C - 69
POST-REMOVAL MONITORING
YEAR ONE
FIRST QUARTER 2011
Appendix C - 70
FIGURE CPOST.Q1.2011-1
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-1 Bryson City Riffle
89
88
87
86
m
85
d
ca
L 84
c
83
ca
d
w
82
81
80
79
Appendix C - 71
0 20 40 60 80 100 120 140 160 180 200 220 240 260
Distance (ft)
FIGURE CPOST.Q1.2011-2
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-2 Bryson City Pool
97
96
95
94
93
m 92
0
d 91
ca
L 90
c 89
i0
s
d 88
w
87
86
85
84
83
----------------------------------------------------------------------------------------------- ------------------------------------
Boulder/Bedrock
Cobble ----------------------x
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal

1

1 /
1

/
17
'NNW
0 20 40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 72
FIGURE CPOST.Q1.2011-3
Tuckasegee River
Post-Dam Removal Monitoring
TransectT-3 Ferguson Field Pool
101
100
99
98
97
m 96
0
> 95
M
94
O 93
c?
iu
w 92
91
90
89
88
87
0

' Boulder/Bedrock
Cobble
............ Gravel
Sand
Silt/Organic
Water Surface
% Max/Min Pre-Removal !

I
I
I
I

„
„

20 40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 73
FIGURE CPOST.Q1.2011-4
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-4 Cherokee Riffle
100
99
98
97
2
CO
96
0 95
d
94
ca
m
L
_ 93
c
0
92
d
u, 91
90
89
88
87
Appendix C - 74
0 15 30 45 60 75 90 105 120 135 150 165
Distance (ft)
FIGURE CPOST.Q1.2011-5
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-5 Barker's Creek Pool
100
99
98
97
E
CO 96
0
95
L
tF
94
0
c?
w 93
92
91
90
89
0
10 20 30 40 50 60 70
Distance (ft)
80 90 100 110 120 130
Appendix C - 75
FIGURE CPOST.Q1.2011-6
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-6 Barkers Creek Riffle
101
Boulder/Bedrock
Cobble
Gravel
100 Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal
99

m

d 98

\ `
ca ,
d
L
i
1
c
97
c

,
w
96

,
95 _
94
------
0 20 40 60 80 100
Distance (ft)
120 140 160 180
Appendix C - 76
FIGURE CPOST.Q1.2011-7
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-7 Gorge Riffle
99
98
97
96
m
0
95
L
tF
0 94
c?
w 93
92
91
90
Distance (ft)
Appendix C - 77
0 20 40 60 80 100 120 140
FIGURE CPOST.Q1.2011-8
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-8 Gorge Pool
99
98
97
96
95
94
CO 93
0
92
91
L
t90
c
0 89
w 88
87
86
85
84
83
82
Appendix C - 78
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Distance (ft)
FIGURE CPOST.Q1.2011-9
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-9 Hotel Riffle
101
100
99
98

m 97
0
96
4-
95
0
94
w
93
92
91
90
0
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
T? Water Surface
Max/Min Pre-Removal
,
11
20 40 60 80
Distance (ft)
100 120 140 160
Appendix C - 79
FIGURE CPOST.Q1.2011-10
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-10 Hotel Pool
101
100
99
98
97
m 96
0
95
c?
94
c
0 93
c?
w 92
91
90
89
88
87
0
Appendix C - 80
10 20 30 40 50 60 70 80 90 100 110 120
Distance (ft)
FIGURE CPOST.Q1.2011-11
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-11 Dillsboro Dam Pool
102
101
100
99
2
m
98
d
m 97
L
0 96 .
a
d
w 95
94
93
92

Boulder/Bedrock
Cobble

Gravel
Sand
Silt/Organic
Water Surface

1 Max/Min Pre-Removal

1
1• 1 ?

1 '
\ I

T
1 C?
I
1 / 1 1 - / I
, I 1
'w
1

0 20 40 60 80 100 120
Distance (ft)
140 160 180 200
Appendix C - 81
FIGURE CPOST.Q1.2011-12
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-12 Dillsboro Dam Riffle
102
101
100
m
0 98
97
c
0
ca 96
0
w
95
94
93
92
-------------------------------------------------------------------- ------------------ ---------------------------------------------------------------------
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
Max/Min Pre-Removal
I

L
A ?? -

99
0 20 40 60 80 100 120 140
Distance (ft)
160 180 200 220 240
Appendix C - 82
FIGURE CPOST.Q1.2011-13
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-14 Lower Middle Pond
95
94
93
92
91
90
m
89
ca 88
a)
L
t/
87
0
ca 86
iu
U' 85
84
83
82
81
80

Boulder/Bedrock
C
bbl

a i o
e
Gravel
Sand
ti Silt/Organic
Water Surface ;
Max/Min Pre-Removal

\

--------------------%
---

I

I
I

I
I
0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 83
FIGURE CPOST.Q1.2011-14
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-15 Upper Middle Pond
95
94
93
92
91
E 90
co
0 89
88
87
c
0
ca 86
iu
w 85
84
83
82
81
80

Boulder/Bedrock
Cobble
Gravel
Sand
0
°
Silt/Organic
Water Surface .;
n Max/Min Pre-Removal

--- --- '
------------------
"---------- ----------------------

0 0 20 40 60 80 100
Distance (ft)
120 140 160
Appendix C - 84
FIGURE CPOST.Q1.2011-15
Tuckasegee River
Post-Dam Removal Monitoring
Transect T-16 Upper Pond
97
96
95
94
93
m 92
0
91
Z
90
L
89
0
> 88
0
w
87
86
85
84
83
----------------------------------------------------------------------------------------------- ------------------------------------ --------------------
Boulder/Bedrock
Cobble
-Gravel
°.. Sand
Silt/Organic
Water Surface
n Max/Min Pre-Removal
„

„
1

0 20 40 60 80 100 120 140 160
Distance (ft)
Appendix C - 85
FIGURE CPOST.Q1.2011-16
Tuckasegee River
Post-Dam Removal Monitoring
TransectT-17 Uppermost Riffle
99
m
0
M
L
t.
,F
0
c?
iu
w
98
97
96
95
94
93
92
91
90
Boulder/Bedrock
Cobble
Gravel
Sand
Silt/Organic
Water Surface
---- Max/Min Pre-Removal
"A :1 K
25 50 75 100 125 150 175 200 225 250
Distance (ft)
Appendix C - 86
APPENDIX D
SEDIMENT SAMPLE RESULTS
PRE-REMOVAL MONITORING
Appendix D - I
FIGURE DPRE-1
Particle Size Distribution T-1
100
90
80
70
60
0
?Z 50
v
A; 40
30
20
10
1st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 t 4th Quarter 2008
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 2
FIGURE DPRE-2
Fractional Components T-1
10
90
80
70
60
v
'04' 50
00
40
30
20
10
1 stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008

Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 3
FIGURE DPRE-3
Particle Size Distribution T-2
100
90
80
70
60
0
?Z 50
v
A; 40
30
20
10
1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 4th Quarter 2008
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 4
FIGURE DPRE-4
Fractional Components T-2
1 st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008
100
90
80
70
60
v
50
p,
40
30
20
10
Sediment Classification
Appendix D - 5
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-5
Particle Size Distribution T-3
100
90
80
70
60
0
50
v
A; 40
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 6
FIGURE DPRE-6
Fractional Components T-3
1 1 st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008
100
90
80
70
60
v
50
p,
40
30
20
10
Sediment Classification
Appendix D - 7
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-7
Particle Size Distribution T-4
100
90
80
70
60
0
50
v
A; 40
30
20
10
0
1st Quarter 2008 - 2nd Quarter 2008 3rd Quarter 2008 f 4th Quarter 2008
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 8
FIGURE DPRE-8
Fractional Components T-4
1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 04th Quarter 2008 1
100
90
80
70
60
v
50
p,
40
30
20
10
Sediment Classification
Appendix D - 9
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-9
Particle Size Distribution T-5
100
90
80
70
60
0
50
v
A; 40
30
20
10
I IN 1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 4th Quarter 2008 - -1st Quarter 2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 10
FIGURE DPRE-10
Fractional Components T-5
1 st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008 ® 1st Quarter 2010
100
90
80
70
60
v
50
p,
40
30
20
10
Sediment Classification
Appendix D - 11
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-11
Particle Size Distribution T-6
1st Quarter 2008 - 2nd Quarter 2008 - 3rd Quarter 2008 -01- 4th Quarter 2008 1 st Quarter 2010
100
90
80
70
60
0
50
v
A; 40
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 12
FIGURE DPRE-12
Fractional Components T-6
1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦4thQuarter 2008 01st Quarter 2010
100
90
80
70
60
v
50
p,
40
30
20
10
Sediment Classification
Appendix D - 13
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-13
Particle Size Distribution T-7
100
90
80
70
60
0
?Z 50
v
A; 40
30
20
10
0
1st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 4th Quarter 2008
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 14
FIGURE DPRE-14
Fractional Components T-7
I IN 1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 04th Quarter 2008
100
90
80
70
60
v
50
p,
40
30
20
10
Appendix D - 15
FIGURE DPRE-15
Particle Size Distribution T-8
100
90
80
70
60
0
50
v
A; 40
30
20
10
1st Quarter 2008 - 2nd Quarter 2008 - 3rd Quarter 2008 -M- 4th Quarter 2008 -1 st Quarter 2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 16
FIGURE DPRE-16
Fractional Components T-8
1 10 1 st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008 ® 1 st Quarter 2010
100
90
80
70
60
v
A; 50
40
30
20
10
Sediment Classification
Appendix D - 17
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-17
Particle Size Distribution T-9
1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 -f-4th Quarter 2008 1stQuarter 2010
100
90
80
70
60
0
s,
?Z 50
u
s,
a 40
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 18
FIGURE DPRE-18
Fractional Components T-9
1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦4th Quarter 2008 ® 1stQuarter 2010
100
90
80
70
60
v
A; 50
40
30
20
10
Sediment Classification
Appendix D - 19
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-19
Particle Size Distribution T-10
100
90
80
70
60
50
A; 40
30
20
10
1st Quarter 2008 - 2nd Quarter 2008 - 3rd Quarter 2008 -0- 4th Quarter 2008 1 st Quarter 2010
1
1
y
1
1
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 20
FIGURE DPRE-20
Fractional Components T-10
1 st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008 ® 1st Quarter 2010
100
90
80
70
60
v
A; 50
40
30
20
10
Sediment Classification
Appendix D - 21
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-21
Particle Size Distribution T-11
100
90
80
70
60
0
?Z 50
v
A; 40
30
20
10
0
1st Quarter 2008 - 2nd Quarter 2008 - 3rd Quarter 2008 -M 4th Quarter 2008 - 1st Quarter 2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 22
FIGURE DPRE-22
Fractional Components T-11
1 st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008 ® 1st Quarter 2010
100
90
80
70
60
v
A; 50
40
30
20
10
Sediment Classification
Appendix D - 23
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-23
Particle Size Distribution T-12
1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 4th Quarter 2008 -1st Quarter 2010
100
90
80
70
60
0
50
v
A; 40
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 24
FIGURE DPRE-24
Fractional Components T-12
1 st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008 ® 1st Quarter 2010
100
90
80
70
60
v
A; 50
40
30
20
10
Appendix D - 25
FIGURE DPRE-25
Particle Size Distribution T-13
100
90
80
70
60
0
?Z 50
v
A; 40
30
20
10
1stQuarter 2008 - 2nd Quarter 2008 3rd Quarter 2008 f 4th Quarter 2008
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 26
FIGURE DPRE-26
Fractional Components T-13
1stQuarter 2008 2nd Quarter 2008 '3rd Quarter 2008 ¦4thQuarter2008
100
90
80
70
60
v
A; 50
40
30
20
10
Sediment Classification
Appendix D - 27
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-27
Particle Size Distribution T-14
100
90
80
70
60
0
s,
?Z 50
u
s,
a 40
30
20
10
0
1 11 1 stQuarter 2008 2nd Quarter 2008 m 3rd Quarter 2008 t 4th Quarter 2008
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 28
FIGURE DPRE-28
Fractional Components T-14
1 st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008
100
90
80
70
60
v
A; 50
40
30
20
10
Sediment Classification
Appendix D - 29
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-29
Particle Size Distribution T-15
100
90
80
70
60
0
50
v
A; 40
30
20
10
1st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 4th Quarter 2008 1 st Quarter 2010
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 30
FIGURE DPRE-30
Fractional Components T-15
1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦4thQuarter 2008 ® 1stQuarter 2010
100
90
80
70
60
v
A; 50
40
30
20
10
Sediment Classification
Appendix D - 31
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-31
Particle Size Distribution T-16
100
90
80
70
60
0
i.
50
C.
U
i.
A; 40
30
20
10
1st Quarter 2008 - 2nd Quarter 2008 - 3rd Quarter 2008 -?- 4th Quarter 2008 1 st Quarter 2010
T
it
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 32
FIGURE DPRE-32
Fractional Components T-16
I NO 1 st Quarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦ 4th Quarter 2008 ® 1st Quarter 2010
100
90
80
70
60
v
A; 50
40
30
20
10
Sediment Classification
Appendix D - 33
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE DPRE-33
Particle Size Distribution T-17
1st Quarter 2008 - 2nd Quarter 2008 - 3rd Quarter 2008 -M 4th Quarter 2008 - 1st Quarter 2010
100
90
80
70
60
0
50
v
A; 40
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 34
FIGURE DPRE-34
Fractional Components T-17
I IN 1stQuarter 2008 2nd Quarter 2008 3rd Quarter 2008 ¦4th Quarter 2008 ® 1stQuarter 2010
100
90
80
70
60
v
50
p,
40
30
20
10
Sediment Classification
Appendix D - 35
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
POST-REMOVAL MONITORING
YEAR ONE
SECOND QUARTER 2010
Appendix D - 36
FIGURE DPOST.Q2.2010-1
Particle Size Distribution T-1
Pre-Removal Max - . Pre-Removal Min 2nd Quarter 2010
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 37
FIGURE DPOST.Q2.2010-2
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-1
2nd Quarter2010 Pre-Removal High OPre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 38
FIGURE DPOST.Q2.2010-3
Particle Size Distribution T-2
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 39
FIGURE DPOST.Q2.2010-4
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-2
2nd Quarter 2010 Pre-Removal High APre-Rem oval Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 40
FIGURE DPOST.Q2.2010-5
Particle Size Distribution T-3
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 41
100
90
80
70
60
0
50
U
i.
Q0
40
30
20
10
0
FIGURE DPOST.Q2.2010-6
Fractional Component T-3
2nd Quarter 2010 Pre-Rem oval High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 42
FIGURE DPOST.Q2.2010-7
Particle Size Distribution T-4
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 43
FIGURE DPOST.Q2.2010-8
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-4
2nd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 44
FIGURE DPOST.Q2.2010-9
Particle Size Distribution T-5
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 45
FIGURE DPOST.Q2.2010-10
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-5
2nd Quarter2010 09 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 46
FIGURE DPOST.Q2.2010-11
Particle Size Distribution T-6
100
90
80
70
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010
N

60
0
w 50
U
a W
a
30
20
10
0
100

10 1 0.1 0.01
Grain Size (mm)
Appendix D - 47
FIGURE DPOST.Q2.2010-12
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-6
2nd Quarter2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 48
FIGURE DPOST.Q2.2010-13
Particle Size Distribution T-7
100
90
80
70
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010
I?

60
0
w 50
U
a 40
a
30
20
10
0
100

10 1 0.1 0.01
Grain Size (mm)
Appendix D - 49
FIGURE DPOST.Q2.2010-14
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-7
2nd Quarter2010 Pre-Removal High APre-Rem oval Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 50
FIGURE DPOST.Q2.2010-15
Particle Size Distribution T-8
100
90
80
70
60
0
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010

w 50
U
a 40
a
30
20
10
0
100

10 1 0.1 0.01
Grain Size (mm)
Appendix D - 51
FIGURE DPOST.Q2.2010-16
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-8
2nd Quarter2010 Pre-Rem oval High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 52
FIGURE DPOST.Q2.2010-17
Particle Size Distribution T-9
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 53
FIGURE DPOST.Q2.2010-18
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-9
2nd Quarter2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 54
FIGURE DPOST.Q2.2010-19
Particle Size Distribution T-10
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 55
FIGURE DPOST.Q2.2010-20
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-10
2nd Quarter 2010 Pre-Removal High APre-RemovalLow
4
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 56
FIGURE DPOST.Q2.2010-21
Particle Size Distribution T-11
100
90
80
70
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010

60
0
w 50
U
a 40
a
30
20
10
0

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 57
FIGURE DPOST.Q2.2010-22
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-11
2nd Quarter 2010 Pre-Removal High A Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 58
FIGURE DPOST.Q2.2010-23
Particle Size Distribution T-12
100
90
80
70
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010

60
0
w 50
U
a 40
a
30
20
10
0

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 59
FIGURE DPOST.Q2.2010-24
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-12
2nd Quarter2010 Pre-Removal High OPre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 60
FIGURE DPOST.Q2.2010-25
Particle Size Distribution T-14
100
90
80
70
60
0
w 50
U
a 40
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 61
FIGURE DPOST.Q2.2010-26
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-14
2nd Quarter2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 62
FIGURE DPOST.Q2.2010-27
Particle Size Distribution T-15
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 63
FIGURE DPOST.Q2.2010-28
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-15
2nd Quarter2010 09 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 64
FIGURE DPOST.Q2.2010-29
Particle Size Distribution T-16
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 65
FIGURE DPOST.Q2.2010-30
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-16
2nd Quarter2010 Pre-Rem ovaIHigh APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 66
FIGURE DPOST.Q2.2010-31
Particle Size Distribution T-17
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 2nd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 67
FIGURE DPOST.Q2.2010-32
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-17
2nd Quarter2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 68
POST-REMOVAL MONITORING
YEAR ONE
THIRD QUARTER 2010
Appendix D - 69
FIGURE DPOST.Q3.2010-1
Particle Size Distribution T-1
Pre-RemovalMax - Pre-RemovalMin 3rd Quarter 2010
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 70
FIGURE DPOST.Q3.2010-2
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-1
3rd Quarter 2010 42nd Quarter2010 Pre-Removal High OPre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 71
FIGURE DPOST.Q3.2010-3
Particle Size Distribution T-2
Pre-RemovalMax - Pre-RemovalMin 3rd Quarter 2010
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 72
FIGURE DPOST.Q3.2010-4
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-2
3rd Quarter 2010 42nd Quarter2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 73
FIGURE DPOST.Q3.2010-5
Particle Size Distribution T-3
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin 3rd Quarter 2010
1

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 74
FIGURE DPOST.Q3.2010-6
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-3
3rd Quarter 2010 4 2nd Quarter2010 Pre-Removal High o Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 75
FIGURE DPOST.Q3.2010-7
Particle Size Distribution T-4
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin 3rd Quarter 2010

N

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 76
FIGURE DPOST.Q3.2010-8
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-4
3rd Quarter 2010 4 2nd Quarter2010 Pre-Removal High OPre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 77
FIGURE DPOST.Q3.2010-9
Particle Size Distribution T-5
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - Pre-RemovalMin 3rd Quarter 2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 78
FIGURE DPOST.Q3.2010-10
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-5
3rd Quarter 2010 ® 2nd Quarter2010 Pre-Removal High OPre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 79
FIGURE DPOST.Q3.2010-11
Particle Size Distribution T-6
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - Pre-RemovalMin 3rd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 80
FIGURE DPOST.Q3.2010-12
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-6
3rd Quarter 2010 42nd Quarter2010 Pre-Removal High OPre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 81
FIGURE DPOST.Q3.2010-13
Particle Size Distribution T-7
100
90
80
70
Pre-RemovalMax - Pre-RemovalMin 3rd Quarter 2010

60
0
w 50
U
a 40
a
30
20
10
0

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 82
FIGURE DPOST.Q3.2010-14
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-7
3rd Quarter 2010 02nd Quarter2010 Pre-Removal High OPre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 83
FIGURE DPOST.Q3.2010-15
Particle Size Distribution T-8
100
90
80
70
60
0
Pre-RemovalMax - Pre-RemovalMin 3rd Quarter 2010
rt
w 50
U
a 40
a
30
20
10
0
100

10 1 0.1 0.01
Grain Size (mm)
Appendix D - 84
FIGURE DPOST.Q3.2010-16
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-8
3rd Quarter 2010 42nd Quarter2010 09 Pre-Removal High o Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 85
FIGURE DPOST.Q3.2010-17
Particle Size Distribution T-9
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin 3rd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 86
FIGURE DPOST.Q3.2010-18
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-9
3rd Quarter 2010 4 2nd Quarter2010 Pre-Removal High o Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 87
FIGURE DPOST.Q3.2010-19
Particle Size Distribution T-10
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin 3rd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 88
FIGURE DPOST.Q3.2010-20
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-10
3rd Quarter 2010 42nd Quarter2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 89
FIGURE DPOST.Q3.2010-21
Particle Size Distribution T-11
100
90
80
70
Pre-Removal Max - Pre-Removal Min 3rd Quarter 2010

.N.-

60
0
w 50
U
a 40
a
30
20
10
0

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 90
FIGURE DPOST.Q3.2010-22
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-11
3rd Quarter 2010 02nd Quarter2010 Pre-Removal High o Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 91
FIGURE DPOST.Q3.2010-23
Particle Size Distribution T-12
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin 3rd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 92
FIGURE DPOST.Q3.2010-24
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-12
3rd Quarter 2010 42nd Quarter2010 09 Pre-Removal High o Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 93
FIGURE DPOST.Q3.2010-25
Particle Size Distribution T-14
100
90
80
70
60
0
w 50
U
a 40
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin 3rd Quarter 2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 94
FIGURE DPOST.Q3.2010-26
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-14
3rd Quarter 2010 ®2nd Quarter2010 Pre-Removal High ©Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 95
FIGURE DPOST.Q3.2010-27
Particle Size Distribution T-15
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
• Pre-Removal Max - -Pre-Removal Min 3rd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 96
FIGURE DPOST.Q3.2010-28
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-15
3rd Quarter 2010 4 2nd Quarter2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 97
FIGURE DPOST.Q3.2010-29
Particle Size Distribution T-16
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin 3rd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 98
FIGURE DPOST.Q3.2010-30
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-16
3rd Quarter2010 42nd Quarter2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 99
FIGURE DPOST.Q3.2010-31
Particle Size Distribution T-17
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin 3rd Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 100
FIGURE DPOST.Q3.2010-32
Fractional Component T-17
3rd Quarter 2010 4 2nd Quarter2010 Pre-Removal High APre-RemovalLow
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Sediment Classification
Appendix D - 101
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
POST-REMOVAL MONITORING
YEAR ONE
FOURTH QUARTER 2010
Appendix D - 102
FIGURE DPOST.Q4.2010-1
Particle Size Distribution T-1
100
90
80
70
60
0
w 50
U
a 40
30
20
10
0
• Pre-RemovalMax - Pre-RemovalMin f 4th Quarter2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 103
FIGURE DPOST.Q4.2010-2
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-1
04th Quarter2010 ® 3rd Quarter 2010 Pre-Removal High ©Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 104
FIGURE DPOST.Q4.2010-3
Particle Size Distribution T-2
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - •Pre-RemovalMin -M 4thQuarter2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 105
FIGURE DPOST.Q4.2010-4
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-2
04th Quarter2010 ® 3rd Quarter 2010 Pre-Rem oval High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 106
FIGURE DPOST.Q4.2010-5
Particle Size Distribution T-3
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin -0 4thQuarter2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 107
FIGURE DPOST.Q4.2010-6
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-3
04th Quarter2010 03rd Quarter 2010 Pre-Removal High ©Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 108
FIGURE DPOST.Q4.2010-7
Particle Size Distribution T-4
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - Pre-RemovalMin -M 4thQuarter2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 109
FIGURE DPOST.Q4.2010-8
Fractional Component T-4
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
04th Quarter2010 03rd Quarter 2010 Pre-Removal High ©Pre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 110
FIGURE DPOST.Q4.2010-9
Particle Size Distribution T-5
100
90
80
70
60
0
w 50
U
a 40
Pre-RemovalMax - Pre-RemovalMin -¦- 4th Quarter2010

30
20
10
0
100

10 1 0.1 0.01
Grain Size (mm)
Appendix D - 111
FIGURE DPOST.Q4.2010-10
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-5
04th Quarter2010 ® 3rd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 112
FIGURE DPOST.Q4.2010-11
Particle Size Distribution T-6
Pre-RemovalMax - Pre-RemovalMin -M 4thQuarter2010
100

90

80

70

60
0
Z
w 50
U
a 40
a
30
20
10
0
100

10 1 0.1 0.01
Grain Size (mm)
Appendix D - 113
FIGURE DPOST.Q4.2010-12
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-6
04th Quarter2010 03rd Quarter 2010 Pre-Removal High OPre-RemovalLow
P
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 114
FIGURE DPOST.Q4.2010-13
Particle Size Distribution T-7
100
90
80
70
Pre-RemovalMax - -Pre-RemovalMin -M 4thQuarter2010

60
0
w 50
U
a 40
a
30
20
10
0

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 115
FIGURE DPOST.Q4.2010-14
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-7
04th Quarter2010 0 3rd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 116
FIGURE DPOST.Q4.2010-15
Particle Size Distribution T-8
100
90
80
70
60
0
Pre-RemovalMax - Pre-RemovalMin -M 4thQuarter2010
50
Z w
U
a 40
a
30
20
10
0
100

10 1 0.1 0.01
Grain Size (mm)
Appendix D - 117
FIGURE DPOST.Q4.2010-16
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-8
04th Quarter2010 ® 3rd Quarter 2010 09 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 118
FIGURE DPOST.Q4.2010-17
Particle Size Distribution T-9
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - •Pre-RemovalMin -M 4thQuarter2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 119
FIGURE DPOST.Q4.2010-18
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-9
04th Quarter2010 03rd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 120
FIGURE DPOST.Q4.2010-19
Particle Size Distribution T-10
100
90
80
70
60
0
Z
w 50
U
a 40
a
Pre-RemovalMax - -Pre-RemovalMin -0 4thQuarter2010

30
20
10
0
100

10 1 0.1 0.01
Grain Size (mm)
Appendix D - 121
FIGURE DPOST.Q4.2010-20
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-10
04th Quarter2010 03rd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 122
FIGURE DPOST.Q4.2010-21
Particle Size Distribution T-11
100
90
80
70
Pre-RemovalMax - -Pre-RemovalMin -0 4thQuarter2010
N

60
0
w 50
U
a 40
a
30
20
10
0

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 123
FIGURE DPOST.Q4.2010-22
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-11
04th Quarter2010 ® 3rd Quarter 2010 Pre-Removal High OPre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 124
FIGURE DPOST.Q4.2010-23
Particle Size Distribution T-12
100
90
80
70
60
0
Z
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - -Pre-RemovalMin -l- 4th Quarter2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 125
FIGURE DPOST.Q4.2010-24
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-12
04th Quarter2010 03rd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 126
FIGURE DPOST.Q4.2010-25
Particle Size Distribution T-14
100
90
80
70
60
0
w 50
U
a 40
30
20
10
0
Pre-RemovalMax - •Pre-RemovalMin -M 4thQuarter2010

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 127
FIGURE DPOST.Q4.2010-26
Fractional Component T-14
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
04th Quarter2010 ® 3rd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 128
FIGURE DPOST.Q4.2010-27
Particle Size Distribution T-15
100
90
80
70
60
0
Z
w 50
U
a 40
a
Pre-RemovalMax - Pre-RemovalMin -M 4thQuarter2010

30
20
10
0
100

10 1 0.1 0.01
Grain Size (mm)
Appendix D - 129
FIGURE DPOST.Q4.2010-28
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-15
04th Quarter2010 ® 3rd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 130
FIGURE DPOST.Q4.2010-29
Particle Size Distribution T-16
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-RemovalMax - Pre-RemovalMin -f-4th Quarter 2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 131
FIGURE DPOST.Q4.2010-30
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-16
04th Quarter2010 03rd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 132
FIGURE DPOST.Q4.2010-31
Particle Size Distribution T-17
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
•Pre-RemovalMax - -Pre-RemovalMin -0-4thQuarter2010
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 133
FIGURE DPOST.Q4.2010-32
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-17
04th Quarter2010 03rd Quarter 2010 Pre-Removal High APre-RemovalLow
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 134
POST-REMOVAL MONITORING
YEAR ONE
FIRST QUARTER 2011
Appendix D - 135
FIGURE DPOST.Q1.2011-1
Particle Size Distribution T-1
Pre-Removal Max - -Pre-Removal Min - - 1stQuarter 2011
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 136
FIGURE DPOST.Q1.2011-2
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-1
AstQuarter 2011 ?4th Quarter 2010 Pre-Removal High APre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 137
FIGURE DPOST.Q1.2011-3
Particle Size Distribution T-2
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - .Pre-Removal Min -40- 1stQuarter 2011
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 138
FIGURE DPOST.Q1.2011-4
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-2
t stQuarter 2011 ? 4th Quarter 2010 ® Pre-Removal High A Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 139
FIGURE DPOST.Q1.2011-5
Particle Size Distribution T-3
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 1stQuarter 2011
1

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 140
FIGURE DPOST.Q1.2011-6
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-3
lstQuarter 2011 ?4th Quarter 2010 ®Pre-Removal High ©Pre-Removal Low

Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 141
FIGURE DPOST.Q1.2011-7
Particle Size Distribution T-4
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - Pre-Removal Min -40- 1stQuarter 2011
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 142
FIGURE DPOST.Q1.2011-8
Fractional Component T-4
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
I 1stQuarter 2011 ?4th Quarter 2010 Pre-Removal High ©Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 143
FIGURE DPOST.Q1.2011-9
Particle Size Distribution T-5
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - .Pre-Removal Min -40- 1stQuarter 2011
WZ.

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 144
FIGURE DPOST.Q1.2011-10
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-5
lstQuarter 2011 ?4th Quarter 2010 ®Pre-Removal High A Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 145
FIGURE DPOST.Q1.2011-11
Particle Size Distribution T-6
100
90
80
70
Pre-Removal Max - .Pre-Removal Min -40- 1stQuarter 2011

60
0
w 50
U
a 40
a
30
20
10
0

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 146
100
90
80
70
60
0
50
U
i.
Q0
40
30
20
10
0
FIGURE DPOST.Q1.2011-12
Fractional Component T-6
1 st Quarter 2011 ? 4th Quarter 2010 Pre-Removal High © Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 147
FIGURE DPOST.Q1.2011-13
Particle Size Distribution T-7
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - .Pre-Removal Min -40- 1stQuarter 2011
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 148
FIGURE DPOST.Q1.2011-14
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-7
t st Quarter 2011 ? 4th Quarter 2010 Pre-Removal High © Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 149
FIGURE DPOST.Q1.2011-15
Particle Size Distribution T-8
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - .Pre-Removal Min -40- 1stQuarter 2011

100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 150
FIGURE DPOST.Q1.2011-16
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-8
1 stQuarter 2011 ? 4th Quarter 2010 Pre-Removal High © Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 151
FIGURE DPOST.Q1.2011-17
Particle Size Distribution T-9
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - .Pre-Removal Min -40- 1stQuarter 2011
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 152
FIGURE DPOST.Q1.2011-18
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-9
1 st Quarter 2011 ? 4th Quarter 2010 ® Pre-Removal High A Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 153
FIGURE DPOST.Q1.2011-19
Particle Size Distribution T-10
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - -Pre-Removal Min 1stQuarter 2011
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 154
FIGURE DPOST.Q1.2011-20
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-10
1 st Quarter 2011 ? 4th Quarter 2010 ® Pre-Removal High © Pre-Removal Low

Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 155
FIGURE DPOST.Q1.2011-21
Particle Size Distribution T-11
Pre-Removal Max - .Pre-Removal Min 1stQuarter 2011
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 156
FIGURE DPOST.Q1.2011-22
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-11
tstQuarter 2011 ?4th Quarter 2010 Pre-Removal High OPre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 157
FIGURE DPOST.Q1.2011-23
Particle Size Distribution T-12
Pre-Removal Max - Pre-Removal Min 1stQuarter 2011
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 158
FIGURE DPOST.Q1.2011-24
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-12
1stQuarter 2011 ?4th Quarter 2010 ®Pre-Removal High A Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 159
FIGURE DPOST.Q1.2011-25
Particle Size Distribution T-14
100
90
80
70
60
0
w 50
U
a 40
30
20
10
0
Pre-Removal Max - .Pre-Removal Min -40- 1stQuarter 2011

100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 160
FIGURE DPOST.Q1.2011-26
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-14
1 stQuarter 2011 ? 4th Quarter 2010 Pre-Removal High © Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 161
FIGURE DPOST.Q1.2011-27
Particle Size Distribution T-15
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
0
Pre-Removal Max - .Pre-Removal Min -40- 1stQuarter 2011
100
10
1
Grain Size (mm)
0.1
0.01
Appendix D - 162
FIGURE DPOST.Q1.2011-28
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-15
1 stQuarter 2011 ? 4th Quarter 2010 Pre-Removal High © Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 163
FIGURE DPOST.Q1.2011-29
Particle Size Distribution T-16
Pre-Removal Max - -Pre-Removal Min -41- 1stQuarter 2011
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 164
FIGURE DPOST.Q1.2011-30
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
0
Fractional Component T-16
1 st Quarter 2011 ? 4th Quarter 2010 ® Pre-Removal High © Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand
Sediment Classification
Fine Sand Silt and Clay
Appendix D - 165
FIGURE DPOST.Q1.2011-31
Particle Size Distribution T-17
Pre-Removal Max - -Pre-Removal Min 1stQuarter 2011
100
90
80
70
60
0
w 50
U
a 40
a
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix D - 166
FIGURE DPOST.Q1.2011-32
100
90
80
70
60
0
50
U
i.
a
40
30
20
10
Fractional Component T-17
1stQuarter 2011 ?4th Quarter 2010 ®Pre-Removal High A Pre-Removal Low
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix D - 167
APPENDIX E
BEDLOAD SAMPLE RESULTS
FIGURE E3.2.1-1
Particle Size Distribution below Scotts Creek
100
90
80
70
60
0
50
w
v
40
p,
30
20
10
100 10 1 0.1 0.01
Grain Size (mm)
Appendix E - 1
FIGURE E3.2.1-2
Fractional Components below Scotts Creek
I ®Removal Max (2010) ®Removal Min (2010) ®Sample 1-A (2011) ®Sample 1-B (2011)
100
90
80
70
60
0
sue. 50
p,
40
30
20
10
Sediment Classification
Appendix E - 2
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
FIGURE E3.2.1-3
Particle Size Distribution at T-12
100
90
80
70
60
0
50
w
v
40
p,
30
20
10
Removal Max (2010) -Removal Min (2010) Sample 2-A (2011) Sample 2-13 (2011)
? 7?H
l
i
IN
100 10 1 0.1 0.01
Grain Size (mm)
Appendix E - 3
FIGURE E3.2.1-4
Fractional Components at T-12
100
90
80
70
60
0
50
p,
40
30
20
10
I ® Removal Max (2010) ®Removal Min (2010) ® Sample 2-A (2011) *Sample 2-13 (2011)
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix E - 4
FIGURE E3.2.1-5
100
90
80
70
60
0
50
w
v
40
p,
Particle Size Distribution at T-17
Removal Max (2010) •Removal Min (2010) Sample 3-A (2011) Sample 3-13 (2011)

30
20
10
0
100

NN.

10 1 0.1 0.01
Grain Size (mm)
Appendix E - 5
FIGURE E3.2.1-6
Fractional Components at T-17
100
90
80
70
60
0
sue. 50
A;
40
30
20
10
I Removal Max (2010) ARemoval Min (2010) ® Sample 3-A (2011) ® Sample 3-B (2011)
Coarse Gravel Fine Gravel Coarse Sand Medium Sand Fine Sand Silt and Clay
Sediment Classification
Appendix E - 6
APPENDIX F
FLOWS
PRE-REMOVAL MONITORING
Appendix F - I
FIGURE F3.1-1
USGS Gage 03508050 Tuckasegee River at SR 1172 near Cullowhee, NC
I t Flow at Cullowhee gage Cross-sectional survey sampling dates Water Quality sampling dates x Removal dates
3000
2500
2000
to 1500
3
0
WO
1000
500
0
Jan-08 Apr-08 Jul-08 Oct-08 Jan-09 Apr-09 Jul-09 Oct-09 Jan-10
Date
Appendix F - 2
FIGURE F3.1-2
USGS Gage 03510577 Tuckasegee River at Barker's Creek, NC
tFlow at Barker's Creek gage Cross-sectional survey sampling dates Water Quality sampling dates 0 Removal dates
5000
4500
4000
3500
3000
2500
3
0
w 2000
1500
1000
500
0
Jan-08 Apr-08 Jul-08 Oct-08 Jan-09 Apr-09 Jul-09 Oct-09 Jan-10
Date
Appendix F - 3
FIGURE F3.1-3
USGS Gage 03512000 Oconaluftee River at Birdtown, NC
-?- Flow at Oconaluftee gage Cross-sectional survey sampling dates Water Quality sampling dates a Removal dates
5000
4500
4000
3500
3000
2500
3
_o
w 2000
1500
1000
500
0
------------------------------- ------------------------------- ------------------------------- -------------------------------- ------------------------------- --------------------------- ----------- ----------------- - --------
Dillsboro Dam
Removal
2/3 to 3/1/2010
-h!1111M Ie A It
LM
-- -- 4 -?,
Jan-08 Apr-08 Jul-08 Oct-08 Jan-09 Apr-09 Jul-09 Oct-09 Jan-10
Date
Appendix F - 4
FIGURE F3.14
USGS Gage 03513000 Tuckasegee River at Bryson City, NC
--Flow at Bryson City gage Cross-sectional survey sampling dates Water Quality sampling dates u Removal dates
11000
10000
9000
8000
7000
6000
a..
U
5000
0
WO
4000
3000
2000
1000
0
Jan-08 Apr-08 Jul-08 Oct-08 Jan-09 Apr-09 Jul-09 Oct-09 Jan-10
Date
Appendix F - 5
POST-REMOVAL MONITORING
YEAR ONE
Appendix F - 6
FIGURE F3.2.1-1
USGS Gage 03508050 Tuckasegee River at SR 1172 near Cullowhee, NC
I t Flow at Cullowhee gage Cross-sectional survey sampling dates Water Quality sampling dates x Removal dates
3000
2500
2000
1500
3
0
w
1000
500
0
Jan-10
Apr-10
Jul-10 Oct-10
Date
Appendix F - 7
Jan-11
Apr-11
FIGURE F3.2.1-2
a..
U
O
w
USGS Gage 03510577 Tuckasegee River at Barker's Creek, NC
tFlow at Barker's Creek gage Cross-sectional survey sampling dates Water Quality sampling dates 0 Removal dates
5000 ..................................................
Dillsboro Dam
Removal
4500 2/3 to 3/1/2010
4000
3500
3000
2500
2000
1500
1000
500 ywi
0
Jan-10
Apr-10
Jul-10 Oct-10
Date
Appendix F - 8
Jan-11
Apr-11
FIGURE F3.2.1-3
a..
U
O
WO
USGS Gage 03512000 Oconaluftee River at Birdtown, NC
-?- Flow at Oconaluftee gage Cross-sectional survey sampling dates Water Quality sampling dates a Removal dates
5000
Dillsboro Dam
Removal
4500 2/3 to 3/1/2010
4000
3500
3000
2500
2000
1500
1000
500
0
Jan-10
Apr-10
Jul-10 Oct-10
Date
Appendix F - 9
Jan-11
Apr-11
FIGURE F3.2.1-4
USGS Gage 03513000 Tuckasegee River at Bryson City, NC
--Flow at Bryson City gage Cross-sectional survey sampling dates Water Quality sampling dates n Removal dates
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .::.
11000.. ................................................................................................................... ...... .......................................................................................................... ..
Dillsboro Dam
10000 Removal
2/3 to 3/1/2010
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
a..
U
0
WO
Jan-10
Apr-10
Jul-10 Oct-10
Date
Appendix F - 10
Jan-11
Apr-11