20070410 Ver 1_Individual_20070305

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sources
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of Greensboro
0 7 04 1 0
P~YM ENT
RECEIVED
A
~`~a city
IN ASSOCIATION WITH
SCHNABEL ENGINEERING AND
GOLDSTEIN AND ASSOCIATES

5410 Trinity Road
Palisades II, Suite 320
Raleigh, NC 27607
Tel: [phone]
Fax: [phone]
March 5, 2007
Mr. Ian McMillan
Division of Water Quality
Mail Service Center 1650
Raleigh, North Carolina 27699-1650
Subject: City of Greensboro Lake Townsend Dam Spillway Replacement
Major 401 Water Quality Certification
Dear Mr. McMillan:
131514/005
The City of Greensboro is requesting issuance of a Major 401 Water Quality Certification for
impacts associated with the replacement of Lake Townsend Dam. Lake Townsend Dam was
constructed on Reedy Fork Creek in 1968 and serves as the City of Greensboro's primary water
supply. The spillway, intake, and pump station are deteriorating due to Alkali Silicate Reaction
(ASR) causing severe cracks in the concrete, and must be replaced to prevent failure of the dam
and loss of the City's principal raw water supply.
Despite avoidance and minimization efforts, the project requires temporary and permanent
impacts to waters of the U.S. (WOUS), including wetlands. Temporary impacts to 0.75 acre
WOUS are required for the installation of the intake pipes. Pre-construction contours will be
re-established upon completion of pipe installation. Permanent impacts to 0.8 acre of WOUS,
including 0.20 acre of jurisdictional wetland and 0.60 acre (2401inear feet) of perennial stream
channel, are required for the construction of the new spillway. Efforts are underway to identify
onsite opportunities for mitigation. If onsite mitigation is not available, then WOUS impacts
will most likely be provided in the form of in-lieu fee payments to the NC Ecosystem
Enhancement Program.
Therefore, on behalf of the applicant, Brown and Caldwell is submitting seven copies of the
attached permit application and supporting information for your review and approval of a
Major 401 Water Quality Certification. Also, attached is the required fee of $475.00. Feel free
to contact me should you have any questions or require additional information.
Very truly yours,
BROWN AND CALDWELL
Shearin Overton Dramby
Regulatory Specialist
JSO:vb
Enclosure
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cc: Andy Williams, Corps; Melinda King, City of Greensboro; Robert Canon, Schnabel
Engineering
P:\Greensboro\Townsend Dam-130603\Permitting\Individual Pemdt\DWQ Cover Letter.doc
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r~i ,~
RECEIVED
E n v i r o n m e n t a l E n g i n e e r s eT' C o n s u l t a n t s

LAKE TOWNSEND DAM REPLACEMENT
i INDIVIDUAL 404/401 PERMIT APPLICATION AND SUPPORT DOCUMENT
Prepared for
City of Greensboro, Greensboro, North Carolina
March 1, 2007
•
5410 Trini Road
Palisades II, Suite 320
Raleigh, North Carolina 27607
•

0 7 04 i 0 _
APPLICATION FOR DEPARTMENT OF THE ARMY PERMIT OMB APPROVAL NO, 0710-0003
(33 CFR 325/ Expires December 31 2004
The Public burden for this collection of information is sastimated to average 10 hours per response, although the majority of applications should require
5 hours or less. This includes the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and
mpleting and reviewing the collection of information. Send commetKS regarding this burden estimate or any other aspect of this collection of
ormation, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Service Directorate of Information
rations and Reports, 1215 Jefferson Davis Highway, Suits 1204, Arlington, VA 22202-4302; and to the Office of Management and Budget,
Paperwork Reduction Project (0710.0003-, Washington, DC 20503. Responderrts should be aware that notwithstanding any other provision of law,
no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control
number. Please DO NOT RETURN your form to either of those addresses. Completed applications must be submitted to the District Engineer having
jurisdiction over the location of the proposed activity.
PRIVACY ACT STATEMENT
Authorities: Rivers and Harbors Act, Section 10, 33 USC 403; Clean Water Act, Section 404, 33 USC 1344; Marine Protection ,Research and
Sanctuaries Act, 33 USC 1413, Secton 103. Principal Purpose: Information provided on this form will bs used in evaluating the application for a
permit. Routine Uses: This information may be shared with the Department of Justice and other federal, state, and local government agencies.
Submission of requested information is voluntary, however, if information is not provided the permit application cannot be evaluated nor can a permit
be issued.
Ons set of original drawings or good reproducible copies which show the location and character of the proposed activity must be attached to this
application (see sample drawings and instructbnsl and be submitted to the District Engineer having jurisdiction over the k>cation of the proposed
activity. An application that is not completed in full will bs returned.
7TENfS f THRC/ 4 TO BE F/LLED BY THE C
1. APPLICATION NO. 2. FIELD OFFICE CODE 3. OATE RECEIVED 4. DATE APPLICATION COMPLETED
lTE BELOW TO BE F/LL BY AAP AN
5. APPLICANT'S NAME 8. AUTHORIZED AGENT'S NAME AND TITLE !en mlent is not requirerJl
City of Greensboro Brown and Caldwell Attn: Shearin Dramby, Regulatory Specialist
6. APPLICANT'S ADDRESS 9. AGENT'S ADDRESS
2602 South Elm-Eugene Street, Greensboro, NC 27406 5410 Trinity Road, Palisades II, Suite 320, Raleigh, NC 27607
?.. APPLICANT'S PHONE NOS. W/AREA CODE 10. AGENT'S PHONE NOS. W/AREA CODE
s. Residence a. Residence
b. Business 336-412-6314 I b. Business 919-233-9178
11. STATEMENT OF AUTHORIZATION
I hereby authorize, N/A to act in my behalf as my agent in the processing of this application and to
furnish, upon request, supplemental information in support of this permit application.
r ~Yr~EIVT
NSA RECEIVED
APPLICANT'S SIGNATURE DATE
NAME, LOCATION AND DESCRIPTION OF PROJECT OR ACTIVITY
12. PROJECT NAME OR TITLE isee inn~uc2ions:
Lake Townsend Dam Replacement
13. NAME OF WATERBODY, IF KNOWN rt evr+~*~1 14. PROJECT STREET ADDRESS rt eppric»G~e!
Lake Townsend and Reedy Fork Creek Lake Townsend Dam is located adjacent to the WTP. The address
for the WTP is:
15. LOCATION OF PROJECT
Guilford County North Cazolina 6268 Bryan Pazk Road
COUNTY STATE Brown Summit, NC 27214-9755
i6. OTHER LOCATION DESCRIPTIONS, IF KNOWN, !seefnstructionsl
The latitude and longitude of the project site is 36.189, -79.732
17. DIRECTIONS TO THE SITE
• The site can be accessed by taking the US Highway 29 ~ exit from Interstate-40. Travel for approximately 8 miles and turn onto
Summit Avenue. Travel approximately 0.6 miles south and turn right onto Bryan Park Road. Travel approximately 0.6 miles and turn
right onto Lake Townsend Road. Travel approximately 0.7 miles to the Lake Townsend WTP and Dam.
R u 7 EDITION OF FEB 94 IS OBSOLETE. (Proponent: CECW-OR)

18. Nature of ACtlVlty (Oescriprion of project, include ad features/
The applicant, the City of Greensboro, proposes to replace the Lake Townsend Dam concrete spillway, raw water intake structure, and pump station
on Reedy Fork Creek in northeastern Guilford County (Figures 1 and 2). Despite avoidance and minimization, temporary impacts to 0.75 acre WOUS
are required for the installation of the intake pipes. Permanent impacts to 0.8 acre of WOUS, including 0.20 acre of jurisdictional wetland and 0.60
acre (240 linear feet) of perennial stream channel, are required for the construction of the new spillway. Efforts are underway to identify onsite
0 ortunities for mitigtion. If onsite mitigation is not available, then VVOUS impacts will most likely be provided in the form of in-lieu fee payments
NC Ecosystem Enhancement Program. Please see sections 2, 4, and 6 of the Permit Support Document for additional information.
19. PfOJCCt PUrpOSe (Describe the reason or purpose of the project, see instructions/
The spillway, intake, and pump station are deteriorating due to Alkali Silicate Reaction (ASR) causing severe cracks in the concrete,
and must be replaced to prevent failure and loss of the City's principal raw water supply. Please see sections 2.2 and 3 of the Permit
Support Document for additional information.
USE BLOCKS 20-22 IF DREDGED AND/OR FILL MATERIAL IS TO BE DISCHARGED
20. Reasonfs) for Discharge
Permanent impacts to WOUS are required for the construction of a new dam and spillway. Temporary impacts to WOUS are required
for the installation of pipes for a new intakke and pumpstation. Please see the Permit Support Document for additional information.
21. Type(s) of Material Being Discharged and the Amount of Each Type in Cubic Yards The new intake will require dredging a trench to place 320 feet of pipe
in Lake Townsend, temporarily impacting 0.6 acre of the lake bed and 15,000 cubic yards. The trench will be backfilled with rock and standard upland soils for stability with
the top layer backfilled with native dredge material. The new spillway and dam embankments will require fill of 4,000 cubic yards in Reedy Fork Creek and 7,000 cubic yards
in the floodplain, impacting 0.6 acre of the stream bed and 0.2 acre of adjacent wetlands. Permanent fill will consist of standard upland soils from onsite borrow areas.
22. Surface Area in Acres of Wetlands or Other Waters Filled (seeinsrrucrionsl
Despite avoidance and minimization, temporary impacts to 0.75 acre WOUS are required for the installation of the intake pipes. Permanent impacts to
0.8 acre of WOUS, including 0.20 acre of jurisdictional wetland and 0.60 acre (240 linear feet) of perennial stream channel, are required for the
construction of the new spillway. Please see sections 4.3 and 4.4 for more information on construction techniques and erosion and sediment controls.
23. Is Any Portion of the Work Already Complete? Yes No X IF YES, DESCRIBE THE COMPLETED WORK
2~ddresses of Adjoining Property Owners, Lessees, Etc., Whose Property Adjoins the Waterbody (lf more than can be entered here,
lease attach a supplemental list).
Please see Appendix A for adjacent property owner information.
25. List of Other Certifications or Approvals/Denials Received from other Federal, State or Local Agencies for Work Described in This Application.
AGENCY TYPE APPROVAL" IDENTIFICATION NUMBER DATE APPLIED DATE APPROVED DATE DENIED
,~
Corps Jurisdictional Unknown at this February 15, In process
Determination time 2007
ould include but is not restricted to zoning, building and flood plain permits
26. Application is hereby made for a permit or permits to authorize the work described in this application. I certify that the information in this
application is complete and accurate. I further certify that I possess the authority to undertake the work described herein or am acting as the
duly authorized agent of the applicant.
F ~ ~ ~~ 7
,J SIGNATURE F APPLIC T DATE SIGNATURE OF AGENT DATE
The application must be signed by the person who desires to undertake the proposed activity /applicant) or it may be signed by a duly
authorized agent if the statement in block 1 1 has been filled out and signed.
U.S.C. Section 1001 provides that: Whoever, in any manner within the jurisdiction of any department or agency of the United States
ingly and willfully falsifies, conceals, or covers up any trick, scheme, or disguises a material fact or makes any false, fictitious or
r udulent statements or representations or makes or uses any false writing or document knowing same to contain any false, fictitious or
fraudulent statements or entry, shall be fined not more than $10,000 or imprisoned not more than five years or both.

• TABLE OF CONTENTS
LIST OF FIGURES ....................................................................................................................................................... III
LIST OF TABLES ......................................................................................................................................................... III
LIST OF ACRONYMS ...................................................................................................................................................IV
EXECUTIVE SUMMARY ......................................................................................................................................... ES-1
1. PROJECT LOCATION ............................................................................................................................................1-1
1.1 Directions to the Site ....................................................................................................................................1-1
1.2 Adjacent Property Owners ............................................................................................................................1-1
2. PROJECT DESCRIPTION ......................................................................................................................................1-1
2.1 Project History ..............................................................................................................................................2-1
2.2 Structural Integrity and Intake Operational Issues ........................................................................................2-1
2.3 Project Purpose and Need ...........................................................................................................................2-2
2.4 Project Scope ...............................................................................................................................................2-3
3. ALTERNATIVES ANALYSIS ..................................................................................................................................3-1
3.1 Raw Water Intake Replacement Alternatives ...............................................................................................3-1
3.1.1 Alternative 1: Tower Intake ...............................................................................................................3-1
3.1.2 Alternative 2: Shoreline Intake Near Deep Water .............................................................................3-2
3.1.3 Alternative 3: Preferred Alternative -Shoreline Intake with Multilevel Pipeline .................................3-3
3.2 Spillway Replacement Alternatives ..............................................................................................................3-4
3.2.1 Alternative 1: New Spillway Generally within Footprint .....................................................................3-4
3.2.2 Alternative 2 -Preferred Alternative -New Spillway Downstream of Existing Structure ..................3-7
4. AVOIDANCE AND MINIMIZATION ........................................................................................................................4-1
5. CONSTRUCTION TECHNIQUES ..........................................................................................................................5-1
5.1 Intake and Pumpstation ................................................................................................................................5-1
5.2 Spillway ........................................................................................................................................................5-1
6. JURISDICATIONAL IMPACTS ...............................................................................................................................6-1
6.1 Direct Impacts ...............................................................................................................................................6-1
6.2 Secondary and Cumulative ..........................................................................................................................6-1
7. COMPENSATORY MITIGATION PLAN .................................................................................................................7-1
7.1 Mitigation for Direct Impacts .........................................................................................................................7-1
7.2 Mitigation for Indirect and Cumulative Impacts .............................................................................................7-1
8. ENVIRONMENTAL INFORMATION .......................................................................................................................7-1
8.1 Environmental Documentation .....................................................................................................................8-1
8.2 Wetland Delineation .....................................................................................................................................8-1
8.3 Stream Assessment .....................................................................................................................................8-2
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Table of Contents Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
8.4 Wildlife ..........................................................................................................................................................8-3
8.5 Threatened and Endangered Species ..........................................................................................................8-3
8.5.1 Protected Species Known from Guilford County ..............................................................................8-3
8.5.2 Protected Species Habitat Descriptions and Potential Impacts ........................................................8-4
8.6 Cultural and Historic Resources ...........:........................................................................... ......8-5
......................
8.7 FEMA ...........................................................................................................................................................8-5
9. LIST OF ADDITIONAL ENVIRONMENTAL PERMITS ...................................................................................... .....9-1
APPENDIX A ......................................................................................................................................................... ........A
Adjacent Property Owners ............................................................................................................................... ........A
APPENDIX B ......................................................................................................................................................... ........B
Agency Scoping Comments ............................................................................................................................. ........B
APPENDIX C ......................................................................................................................................................... ....... C
Wetland Delineation Data Sheets .................................................................................................................... ....... C
REFERENCES ...................................................................................................................................................... REF-1
•
•
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Table of Contents Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
• LIST OF FIGURES
FIGURES ARE LOCATED BEHIND FIGURE TAB, UNLESS OTHERWISE NOTED
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6A
Figure 66
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 11a
Figure 11b
Figure 12
Figure 13
Location Map
Vicinity Map
FEMAmap
Guilford County Soil Map
Adjacent Property Owners (Appendix A)
USGS Topo of Reedy Fork
USGS Topo of Reedy Fork
Wetland Delineaton Map
Intake Alternative 1
Intake Alternative 2
Intake Alternative 3
Intake Alternative 4, Preferred Alternative
Intake Preferred Alternative, Plan View
Intake Preferred Alternative, Profile View
Spillway Alternative 1 a
Spillway Alternative 1 b
Figure 14 Spillway Alternative 1c
Figure 15 Spillway Alternative 1d
Figure 16 Spillway Alternative 2, Preferred Alternative
LIST OF TABLES
Table 3.1 Alternative 1 Configurations .................................................................................................................3-5
Table 3.2 Alternative 2 Configurations .................................................................................................................3-5
iii
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Tab-e of Contents Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document

•
•
LIST OF ACRONYMS
DEH Division of Environmental Health
DLR Division of Land Resources
DWQ Division of Water Quality
PWS Public Water Supply Section
ASR Alkali Silicate Reaction
WTP Water Treatment Plant
WOUS waters of the U.S.
SEF secondary ettringite formation
SDF Spillway Design Flood
PMP Probable Maximum Precipitation
MGD million gallons per day
ACB articulated concrete blocks
RCC roller compacted concrete
EA Environmental Assessment
SEPA North Carolina State Environmental Policy Act
FONSI Finding of No Significant Impact
iv
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LAKE TOWNSEND DAM REPLACEMENT
INDIVIDUAL 404/401 PERMIT APPLICATION AND SUPPORT DOCUMENT
EXECUTIVE SUMMARY
The City of Greensboro proposes to replace the Lake Townsend Dam concrete spillway, raw water intake
structure, and pump station on Reedy Fork Creek in northeastern Guilford County (Figures 1 and 2). The
spillway, intake, and pump station are deteriorating due to Alkali Silicate Reaction (ASR) causing severe cracks
in the concrete, and must be replaced to prevent failure of the dam and loss of the City's principal raw water
supply. Since the raw water intake and pump station, which convey raw water to the Townsend Water
Treatment Plant (WIT'), are integral to the dam, they must be replaced prior to the removal of the concrete
spillway. The replacement raw water intake and pump station must be built fast, stnictturally separate from
the dam to avoid interruption in the City's potable water supply during dam reconstruction. Next, a
construction access road must be installed from Doggett Road to the north end of the dam to provide access
for construction machinery. Then, a new fixed-crest labyrinth spillway must be built immediately
downstream of the deteriorating one, and tied into the existing earthen embankments at each end. The space
between the old and new spillways will be filled with water and the old spillway crest will be partially
demolished. The new labyrinth spillway along with embankment armoring will also enable the dam to meet
current NC Dam SafetyProgram standards.
Despite avoidance and minim;7ation efforts, the project requires temporary and permanent impacts to waters
of the U S. (WOLiS), including wetlands. Temporary impacts to 0.75 acre WOUS are required for the
installation of the intake pipes. Pre-construction contours will be re-established upon completion of pipe
installation. Permanent impacts to 0.8 acre of WOUS, including 0.20 acre of jurisdictional wetland and 0.60
acre (2401inear feet) of perennial stream channel, are required for the construction of the new spillway.
Efforts are underway to identifyonsite opportunities for mitigtion. If onsite mitigation is not available, then
WOUS impacts will most likely be provided in the form of in-lieu fee payments to the NC Ecosystem
Enhancement Program. Additional impacts from construction activities will be m;n;m;~Pd through the use of
an approved Division of Land Resources (DLR) Erosion and Sedimentation Control plan and construction of
Best Management Practices (HMI's).
This project is an in-kind replacement and will not affect the normal water surface elevation, volume, or safe
yield of Lake Townsend, flow in Reedy Fork Creek, or the City's raw water intake and treatment plant
capacities. Procedures will be implemented during construction to ensure maintenance of downstream flows
and facilities will be incorporated into the design to enable release of required m;n;mum flows. The project is
intended onlyto mitigate the ongoing risks regarding dam safety, water supplysafety, public safety, flood
passage, and environmental effects from a potential uncontrollable release of water resulting from dam
failure. It is not agrowth-inducing project, as no additional water supplycapacitywill be added, and thus this
project has no secondaryimpacts. The following sections provide a detailed description of the project.
ES-1
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LAKE TOWNSEND DAM REPLACEMENT
INDIVIDUAL 404/4Q1 PERMIT APPLICATION AND SUPPORT DOCUMENT
PROJECT LOCATION
The Cit~s Lake Townsend Dam project is located within Guilford County, North Carolina (Figure 1) and the
Haw River watershed in Hydrologic Unit Code 03030002 (Figure 2). Lake Townsend is a 1,635 acre
impoundment built on Reedy Fork Creek in 1968, with a drainage basin area of 105 square miles and normal
pool capacity of 6.6 billion gallons. It is the City's primary water supply reservoir, and is classified WS-III-CA
NSW. The existing dam, spillway, intake structure, and pump station are located along the northeastern
boundary of Lake Townsend. The reservoir discharges into Reedy Fork Creek in northeastern Guilford
County, North Carolina and serves as the City's primarysource of potable water, currentlyproviding 70
percent of the Cit~s water supply.
1.1 Directions to the Site
The site can be accessed by taking the IJS I~ighway 29 (1~ exit from Interstate-40. Travel for approximately
8 miles and turn onto Summit Avenue. Travel approximately 0.6 miles south and turn right onto Bryan Park
Road. Travel approximately 0.6 miles and turn right onto Lake Townsend Road. Travel approximately 0.7
miles to the Lake Townsend WIT' and Dam
1.2 Adjacent Property Owners
• Properties surrounding Lake Townsend include a mixt~ue of residential, agricultural, recreational, and
wooded land. All property directly adjoing Lake Townsend is owned by the City of Greensboro and/or
Guilford County. A graphic depicting adjacent property owners and a table of names and addresses are
located in Appendix A.

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LAKE TOWNSEND DAM REPLACEMENT
INDIVIDUAL 404/401 PERMIT APPLIGATION AND SUPPORT DOCUMENT
2. PROJECT DESCRIPTION
2.1 Project History
The City of Greensboro (City) owns and operates the Lake Townsend Dam, a class C high hazard dam, and
Townsend Water Treatment Plant (WTP) on Reedy Fork Creek in northeastern Guilford County (Figures 1
and 2). The dam, which is an earth embankment with a gated concrete spillway along with a water intake
structure and spillway, was constructed in 1968 during a time when testing of concrete aggregates for
potential Alkali Silicate Reaction (ASR) was not common. The dam became operational in 1968 and has
exhibited signs of significant deterioration from ASR for the past 25 years. Investigations and subsequent
reports prepared by Jewell Engineering Consultants, PC in 2005 include extensive investigations documenting
the ASR damage. The Jewell report indicated that deterioration of the concrete occurred more rapidly than
previously expected. The findings of these reports indicate that in-situ repair of the structures is infeasible
and complete or substantial replacement of the concrete structures is recommended.
The continuing degradation of the existing facilities and the potential for structural failure of one or more
components of this high hazard dam makes the project an urgent need. Recent inspections of the upstream
face of the spillway indicatedsigmficant cracks in the structure. Due to stability concerns, the City has
lowered the reservoir level approximately 2 feet to reduce uplift pressures on possible open joints or cracks in
the structure. In addition, spillway structural modifications including the installation of post tensioned
anchors are underway to improve the stability of the structure and allow the City to raise the reservoir level
back to normal pool to maintain this critical water supply.
2.2 Structural Integrity and Intake Operational Issues
Spillway -The existing spillway consists of a concrete, ogee-shaped weir divided into nine 25-feet wide bays
and one 15-feet wide bay. Ten feet high vertical lift gates are located atop the concrete spillway in each of the
25-feet wide bays, and a skimmer gate is located in the 15-feet wide bay. A 200-feet wide excavated earthen
emergency spillway is located through the north abutment.
Hydrologic and hydraulic analyses indicate that the existing spillwayhydraulic capacity is inadequate to pass
the state mandated 3/a PMP (Probable Maximum Precipitation) spillway design flood (SDF). Based on the
hydrologic and hydraulic analysis accepted by North Carolina Department of Environment and Natural
Resources (NC DENR), the existing dam would overtop by at least 2.0 feet and the duration of overtopping
would be 5.7 hours or more for the SDF, which would likelycause failure of the existing embankment,
resulting in an uncontrolled release of reservoir storage and loss of the water supply reservoir. In addition, all
three dams located upstream of Lake Townsend (Lake Jeanette, Lake Brandt, and Lake I Irggins) would
overtop for the 3/a PMP, likely causing failure of these structures and increased inflow to Lake Townsend.
The two cityowned dams, Lake Brandt and Lake I Tiggins, are classified as "high hazard" structures with a
SDF equal to the 3/a PMP. Based on discussion with NC DENR, it maybe possible to justify a reduction in
the SDF for these dams, provided the upgrade of Lake Townsend considers their failure for the SDF.
Incorporating the abilityto safelypass the 3/a PMP including the failure of the upstream dams into the Lake
Townsend spillway replacement could likely eliminate the future requirement to upgrade Lake Brandt and
Lake I-iiggins dams to meet NC DENR spillway capacity criteria. This could result insubstantial cost savings

2-1
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2: Project Description Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
• to the City and reduce environmental impacts associated with spillway capacity upgrades to these other two
dams. This strategy has been discussed with NC DENR and they have verbally concurred with the approach.
Emergency Spillway -The existing emergency spillway, located about 1,000 feet north of the dam, consists
of a 200-foot wide excavated earthen channel with a concrete cutoff wall at the upstream end of the control
section that extends 4 feet below the existing ground surface. The control section is three feet above normal
pool, or EL 718.5. Schnabel Engineering estimated the hydraulic capacity of the spillwayto be 9,600 cfs at
top of dam (EL 725.5), and if the primary spillway gates are operated to maintain normal pool until they are
completely opened, the annual probability of emergency spillway operation is less than 1 percent.
Based on a seismic refraction survey of the existing emergency spillway, Schnabel Engineering estimated the
depth to bedrock in this area to be generally 15 to 25 feet below the ground surface. A preliminary stability
and integrity analysis of the Lake Townsend Dam emergency spillway was completed by Schnabel
Engineering using the SITES computer program. Spillway material properties were based on soils data from
the Soil Survey of Guilford County (December 1977) and data collected during the seismic refraction survey
of the spillway. The soil parameters used in the analysis were based on average values for the soil types
shown in the soil survey. The SITES analysis indicates that for the design event, vegetal cover failure would
occur within 0.3 to 4.3 hours from the start of flow through the spillway, dependent on location in the
spillway. Headcut began at the downstream end of the control section and progressed to the upstream end of
the control section with a final height of 4.5 feet. The results of the SITES analysis indicates the emergency
spillway configuration and soils are not suitable for use in passage of the SDF and that erosion failure of this
spillway is likely for this event, resulting in an uncontrolled release of reservoir storage and potential loss of
the water supply reservoir.
Intake and Pump Station -The existing intake structure and pump station are located at the south end of
the concrete spillway section of the dam Water is presently drawn through one of four sluice gates at various
• levels and pumped to the WIT'. A fifth low level gate is available at a depth of approximately 30 feet but is
seldom, if ever, used. A single traveling screen is used intermittently to remove debris from the raw water.
The current intake does not provide for exclusion of fish and other aquatic species and was not designed to
maintain low intake velocities sufficient for the escape of aquatic species.
As part of the existing dam, the intake and pump station also exhibit structural damage due to ASR
Additionally, there are operational issues with the lower sluice gates due to infrequent use and silt build-up.
2.3 Project Purpose and Need
Lake Townsend is the City's and surrounding residents' primarysource of potable water, currentlyproviding
approximately 70 percent of the City's water supply. It also serves as a public recreational lake offering
fishing, pleasure boating, and sailing. In order to protect life and private property, protect the City's primary
water supply reservoir, protect the public's recreational use of the lake, and prevent degradation to
surrounding and downstream wetland and stream resources, the City must replace the dam spillway, intake,
and pump station. The continuing degradation of the existing facilities and the potential of structural failure
of one or more components, or the need to lower the reservoir to prevent structural failure makes the project
an urgent need to prevent flooding, loss of wildlife and aquatic habitat, and to protect the City's principal
water supply.
'T'herefore, the purpose of this project is to replace approximately 1,300 feet of Lake Townsend Dam
including the primary spillway, raw water intake, and pump station, which are deteriorating. Due to the
advanced degradation of the spillway, raw water pumping station and intake structure, and in order to protect
public health, private property, and lake and dowstream ecological habitat, the applicant has determined it is
imperative that a new pump station and intake structure be constructed within the shortest possible schedule
with no loss of service. Since the raw water intake and pump station, which convey raw water to the WTP,
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2: Project Description Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
. are integral to the dam, they must be replaced prior to the removal of the current spillway to avoid
internrpting Greensboro's potable water supply. Due to the urgent need for the project, the schedule for
construction is proposed for Ju1y2007, pending permit approvals.
In addition to the stability and safety issues, hydrologic and hydraulic analyses indicate that the hydraulic
capacity of the existing spillway is inadequate to pass the state mandated 3/a PMP SDF. The excessive damage
caused by ASR and the need f or additional spillway capacity makes permanent rehabilitation or repair of the
existing structure infeasible; therefore, the objective of the proposed project is to replace the concrete
spillway, water supply intake, and pump station in a timely manner.
The proposed dam replacement and new intake and pump station will have no significant effect on Lake
Townsend's water surface elevation or area, volume, safe yield, pumping capacity, or instream flow in Reedy
Fork Creek This project is not an expansion of water resource capacity; it is intended only to address safety
and operational issues, especially the risk of dam failure and the ability to pass major storm events with
minimum risk of property loss or danger to WTP staff and the public.
2.4 Project Scope
The project is proposed to bean "in-kind" replacement of the existing facilities with no change in operational
capacity. As proposed, the replacement raw water intake and pump station will be built first, structurally
separate from the dam to avoid interruption in the City's potable water supply during dam reconstruction. A
combination of variable and fixed speed pumps will be used to supply raw water to meet the existing average
daily flow range of 16 to 23 million gallons per day (MGD) with a f irm pumping capacity of 30 MGD. An
existing 500 HP, 30 MGD vertical turbine pump will be used as 100 percent backup capacity for the new
station. All other components for the intake and the pump station will be new.
• A construction access road must be installed from Doggett Road to the north end of the dam to provide
access for construction equipment. Then, a new spillway consisting of a fixed-crest labyrinth in conjunction
with a gated structure (to be used primarily for stream diversion during construction and drawdown of the
lake) will be built downstream of the deteriorating spillway, and tied into the existing dam with earthen
embankments at each end. The space between the old and new spillways will be filled with water and the old
spillway and dam will be partially demolished as necessary to achieve the proposed hydraulic capacity of the
new spillway. The new spillway will increase the dam's flood passage capacity to meet current NC Dam
Safety Program standards, without relying upon the existing earthen emergencyspillway.

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LAKE TOWNSEND DAM REPLACEMENT
IND1VlDUAL 404/401 PERMIT APPLICATION AND SUPPORT DOCUMENT
3. ALTERNATIVES ANALYSIS
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To address the ASR, spillway capacity, and stability concerns at Lake Townsend Dam, concepts were
developed for rehabilitating the existing structure along with several replacement alternatives. Project
alternatives were analyzed using the following constraints:
^ The reservoir shall be maintained at or near normal pool throughout construction and the City must have
uninterrupted supply to the water treatment plant.
^ The proposed modifications shall include provisions to draw down the reservoir in a reasonable amount
of time.
^ Site access for the dam construction shall be from Doggett Road, to the north of the dam.
Additional considerations in evaluating alternatives include:
^ avoiding and minim;~.ing environmental impacts,
^ completing the replacement of the structure in a timely manner due to the continuing deterioration from
ASR,
^ reducing spillway maintenance and operating costs, and
^ providing a cost effective solution with a focus on the value of constructed features.
Although repair or rehabilitation of the degraded structures would be the least environmentally damaging
alternative, engineering evaluations concluded that the only practicable alternative that meets the long term
needs of the City and its residents is to replace the existing dam and associated intake and spillway structures
outside of the footprint of the existing structures. The structures cannot be replaced within the original
footprint because water supplywould be disrupted. Since Lake Townsend is the Cit~s primarywatersupply,
this would be an infeasible alternative. Due to the excessive damage caused by ASR and the need for
additional spillway capacity, permanent rehabilitation or repair of the existing structure is not feasible;
therefore, the objective of the proposed project is to replace the concrete spillway, water supply intake, and
pump station in a timely manner. Each of the alternatives considered, which are discussed below, propose
minirnal environmental impacts.
3.1 Raw Water Intake Replacement Alternatives
Three intake design concepts were identified: tower intake in the lake separate from the pump station;
shoreline intake integral to the pump station with a deep water channel near the shoreline; and shoreline
intake integral to the pump station with multiple level pipe intakes extending into the lake. Consensus was
reached that the onshore alternatives offer the greatest benefit with least environmental impacts at lower cost.
The benefits and drawbacks of each alternative are discussed below.
3.1.1 Alternative 1: Tower Intake
Alternative 1 is an independent "island" intake in the middle of the lake (shown in Figure 8). The structure
would be approximately 20 feet by20 feet by40 feet deep and would require permanent impacts to the lake
bottom Water would enter the tower through large sluice gates which would have coarse screening to
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3: Alternatives Analysis Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
prevent floating sticks and debris from entering. The inlets would be located at three levels to allow access to
different strata within the lake. 'The structure would rest on the lake bottom and water would be conveyed
back to a shoreline pump station through a 60-inch tunnel. Mechanical and electrical equipment would be
minimal on the intake tower, and fine screening would occur on-shore to manage safety and accessibility
issues. One of the primaryreasons for considering an island intake is because it m;n;m;~PS the potential for
turbidity and offers the greatest flexibility in access to cleaner water, particularly during the dam
reconstruction. However, there are several drawbacks. Construction would be difficult and expensive as the
intake must be constructed "in the wet" using the caisson method or a cofferdam. After construction, access
would be by boat or by pedestrian bridge. A bridge would be expensive, but safer than boat access. On
windy days boat access could prove difficult and on precipitation days the access ladder could be slippery or
frozen. Other challenges that must be dealt with include security, varying water levels, and preventing public
access. Long term, an island intake would be the most complex and most costly to maintain. Furthermore,
additional geotechnical studies were completed to determine suitability of the soils for a tunnel. The presence
of fragmented rock and poor soil conditions prevents tunneling; therefore, this alternative is not an option.
3.1.2 Alternative 2: Shoreline Intake Near Deep Water
The raw water intake could be situated on the shoreline where the banks are steep and adequate depth is
achieved close to the shoreline. This configuration would be similar to the tower intake in that it would
provide immediate access to the various lake levels, but it would not have the complexities of construction
"in the wet". The intake structure would be an integral part of the onshore pump station. Water would enter
the structure directly through the outer wall of the intake. Large sluice gates would be mounted at various
levels for water intake. Vertical screens would be installed ahead of the pump pit to facilitate the removal of
any trash or debris that might enter the intake. The screens would be designed with a 3/8-inch wire mesh to
exclude aquatic species and would be sized to maintain maximum velocities of less than 50 feet per minute.
There are several locations for this type of intake, but none of them are close or easily accessible to the
existing WTP.
One option (Alternative 2A) shows a potential location near the golf course at a steep embankment (Figure
9). From this location water would be conveyed back to the existing WTI' through a 36-inch under-lake
tunnel. Access to this site would be difficult as operators would have to leave the WTP and access it through
the golf course f or operations and maintenance. This remote location would increase security issues and the
required building height would be an aesthetic challenge. In addition, it would require construction of a large
raw water pipeline to the WTP with additional impacts to jurisdicational waters, impacts to the forested lake
buffer, and temporary closure of the marina whereas the other alternatives considered would not. All other
alternatives evaluated propose the pumpstation location on existing impervious area. Furthermore, the
control of erosion and sedimentation during construction would be more of a challenge at this location due
to the steepness of the embankment and it would be more expensive to install power supply, instnunentation
and control wiring at this location.
A second option (Alternative 2B) would provide the benefit of full lake depth at the shore by building the
structure near the W'IT' and dredging a deep water channel. The dredging option (shown in Figure 10) would
m;nim;~e many of the maintenance and accessibility issues listed in Alternative 2A above and would be less
costly than laying pipe to remote locations; however, raw water quality in the channel would be less suitable
than from a natural deep embankment or from the center of the reservoir and permanent impacts to the lake
bottom are required for such a channel. This option requires the largest volume of lake dredging and
permanent impacts to jurisdictional waters of all of the considered options. Additionally, periodic dredging
of the channel could potentially be required to remove built-up sediments, resulting in disturbance of aquatic
habitat and recreational values of the lake.
•
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3: Alternatives Analysis Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
3.1.3 Alternative 3: Preferred Alternative -Shoreline Intake with
Multilevel Pipeline
A shoreline intake with pipelines to draw water at varying depths was proposed as a third alternative (shown
in Figures 11,11-A, and 11-B). The pipes, would be direct-buried into the bank of the lake and would extend
to reach the various water levels desired for operation. The low level intake would need to be extended
approximately 350 feet or less into the reservoir. Due to the long lengths of piping and operating velocities,
the ends of the pipe would have to be protected with "exclusionary" screening. Exclusionaryscreens will
have minimum openings of 3/8 inch in width and sized to limit velocities to 0.5 feet per second or less to
protect aquatic species. Each pipe is sized to handle the peak flow and if additional pipes are utilized the
intake velocities will. be reduced even further. These screens will require an air purging or hydraulic cleaning
system to maintain the intakes. The screens would, however, eliminate the need for the vertical traveling
screens and would significantly reduce the footprint of the concrete intake structure. This alternative could
be constructed close to the treatment plant, minimising power, accessibility, and security issues. Short-term
mitigation f or turbidity created by dam construction will be implemented, such as requiring a polyethylene
curtain to protect the existing intake and installing silt curtains for all underwater construction to preserve
water quality and to minimi~P turbidity. This solution appears to address the project's critical objectives most
effectively.
To min;mi~P the disruption of the lake bottom, the pipelines will be stacked vertically in a trench and
supported every40 to 50 feet between two piles. In order to avoid permanent impacts to the lake bottom, the
pipelines will be partially buried in the lake bottom and partially exposed in the reservoir, depending on
relative lake bottom and pipe elevations. The invert of the lowest pipe will rest a minimum of 3 feet above the
lake bottom. The end of each pipe will support a 48-inch tee with an exclusionary screen up to 216-inches
long and abuilt-in air purging system.
A trench will be hydraulically dredged or dug "in the wet" to lay the intake pipelines. Support piles will be
driven to firm embedment as determined by soil characteristics and the rock elevation. Horizontal beams
between piles will support saddles or cradles for each pipe. Pipe will be secured to the piles and beams by
strapping. After each pipe is installed, the trench will be backfilled with a mixture of gravel and/or native
soils to the top of the pipe. Once the top pipe is installed the existing grade will be restored with a backfill
mixture including native soils. Additional protection of exposed pipe will be considered.
It should be noted that the area could be protected by a cofferdam and constructed in the dry. However, due
to the depth of water, size of support piling and sheeting, dewatering costs, and construction inhibited by
cross supports between the sheet piling walls, the intake piping most likelywill be constructed in the wet.
Spoils from the dredging operation will be dewatered and stored inside erosion controls on the existing
emergency spillway. Some or all of the spoils will be reused as backfill. Any remaining spoils will be
permanently seeded on the spillway for erosion control.
Intake piping will be supplemented with provisions for air/water cleaning feed lines, sample lines, and
chemical addition lines, either for pre-disinfection or for invasive species (e.g. zebra mussel) control. These
lines will be installed as one unit along the top intake pipe and routed to each pipe inlet. 'The lake end of
sample lines would ternnate outside the inlets, and those for potential chemical addition would terminate
inside the inlets. The wet-well ends of all support piping would bypass the inlet gates. The intakes would be
protected f rom the boating public by a series of buoys connected with floating ropes or warning devices.
Based on the criteria considered, Alternative 3 is the best practical alternative, with a pumping station located
between the dam and the marina, which draws water from multiple lake levels through pipes extending into
the higher grralitywater area of the lake. The inlet pipelines will extend through the lakeside wall to three
depths in the lake and will be controlled by mechanical gates and valves at the pump station. No permanent
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3: Alternatives Analysis Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
impacts to jurisdictional waters are required for this alternative and aquatic habitat will be protected through
the use of exclusionary screening and intake velocities not exceeding 0.50 feet per second.
3.2 Spillway Replacement Alternatives
Two general spillway replacement alternatives were considered, with several spillway configurations within
each alternative. The two general alternatives are: construct new spillwaywithin or as close as practical to the
existing structure's footprint; and construct new spillway immediately downstream of the existing spillway.
3.2.1 Alternative 1: New Spillway Generally within Footprint
To construct a new spillway generally within the footprint of the existing spillway and dam and demolish the
existing structure, an extensive cofferdam and diversion facilities would be required.
Based on the site constraints, project goals, environmental impacts, and construction costs, the following
configurations were developed:
a) Construct a new spillway capable of passing the SDF at the existing top of dam (EL 725.5).
b) Constrict a new primary spillway and a labyrinth spillway within the existing emergency spillway to pass
the SDF at EL 725.5.
c) Construct a new primary spillway and armor the embankment to protect against overtopping failure.
d) Construct a new primary spillway and raise the top of dam to pass the SDF without overtopping.
Each design alternative with the exception of 1a requires the same impacts to WOUS. Configuration 1a
requires significant re-grading to Reedy Fork Creek at the structure outlet to convey flow f rom the spillway to
the stream For Alternatives 1a, 1c, and 1d, an embankment is proposed to prevent flow through the
emergency spillway due to concerns with erosion of the existing soil causing an uncontrolled release of
reservoir storage, as indicated in Schnabel's SITES analysis. In addition, the emergency spillway does not
provide significant additional spillway capacity relative to the computed SDF. Finally, if a fixed crest spillway
is used to replace the existing gated spillway, the emergency spillway would flow more frequently.
Various spillwayconfigurations (labyrinth, gated, or combination) could be used for each alternative. The
ability to pass the SDF, including the f ailure of upstream dams, was included in the evaluation of each
alternative. The four design alternatives are described in more detail below.
Spillway Alternative Configuration 1a -Alternative 1a (Single Spillway, Maintain Top of Dam) consists of
new spillway capable of passing the SDF without overtopping the existing embankment. The structure could
be a labyrinth weir, gated spillway, or a combination of these structures. Preliminaryhydraulic analyses were
performed to size both a gated and labyrinth spillway. Both the non-failure and failure of all three upstream
dams (see Section 2.1 for discussion) were evaluated for this alternative. These configurations are
summarized in Table 3.1.
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3: Alternatives Analysis Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
•
.~
Consider
Structure Type Upstream Structure Width (ft)' Description
Breaches
Labyrinth No 420 20 ft high weir, 10 cycles
Labyrinth Yes 560 20 ft high weir, 14 cycles
Gated No 275 12 ft high gates
Gated Yes 275 16 ft high gates
Labyrinth/ Gated Yes 530 20 ft high weir, 12 cycles
50 ft by 15 ft high gates
'measured along axis of dam -existing spillway length is approximately 280 ff.
The labyrinth spillway with a structure width of 560 feet is shown in Figure 12. Other configurations for
Alternative 1a would have a similar layout, with the.gated options within the lateral limits of the existing
spillway. If the structure is significantly wider than the existing spillway (280 ft ±), re-grading of Reedy Fork
Creek would be required at the structure outlet to convey flow f rom the spillway to the stream. This would
require permanent impacts to WOUS. The fully gated option within the lateral limits of the existing spillway
would require significantlymore maintenance than a fixed crest labyrinth. In addition, as evidenced by review
of the stream gage data for Reedy Fork Creek downstream of Lake Townsend, stream flow fluctuates
significantly during runoff events as a result of gate operations. Alternative 1a would require pern~anent
impacts to WOLiS and it is believed to be among the most costly of the configurations evaluated.
Spillway Alternative Configuration 1b -Alternative lb (Two Spillways, Maintain Top of Dam) includes
replacing the spillway with a new primary spillway (labyrinth, gated, or combination) and an auxiliary labyrinth
spillway in the existing emergency spillway to pass the SDF without overtopping the embankment. To avoid
additional environmental impacts regarding more frequent flow in the emergency spillway channel, the
primaryspillwaywould be sized to provide hydraulic capacitysimilar to that of the existing structure at the
onset of flow in the auxiliaryspillway. Hydraulic analyses were performed to design both structures
considering scenarios that include both the breach and non-breach of upstream dams. A primary
gated labyrinth spillway with a width of 280 feet and an auxiliary labyrinth spillway having a width of 200 feet
were assumed for both scenarios. The configurations evaluated are shown in Table 3.2.
Consider
Upstream
Primary Spillway Description Structure
Width (ft)'
Auxiliary Labyrinth Description
Breaches
No Labyrinth: 20 ft high weir, 5 cycles 290 10 ft high weir, 10 cycles
Gated: 80 ft by 15 ft high

Yes Labyrinth: 20 ft high weir, 5 cycles
290
12.5 ft high weir, 8 cycles

Gated: 80 ft by 20 ft high .
•
The second configuration (considering upstream breaches) is shown in Figure 13. This configuration is not
entirely within the footprint of the existing dam and it would require temporary and permanent impacts to
WOL1S. In addition, there are potential temporary and permanent impacts to WOUS associated with the
excavation of an outlet channel downstream of the auxiliary labyrinth spillway. There is also potential for
damage to WOUS resulting f rom flow through the auxiliary spillway during more extreme flood events.
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3: Alternatives Analysis Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
• Significant excavation would be required upstream and downstream of the auxiliary labyrinth. The
excavation upstream has potential for creating sediment and turbidity in the lake during construction. In
addition to required permanent and temporary impacts to WOUS, this alternative is also believed to be
among the more costlyconfigurations evaluated.
Spillway Alternative Configuration 1c -For Alternative 1c (Single Spillway, Armor Embankment)
presented in Figure 14, the primary spillway would be replaced by a spillway with hydraulic capacity similar to
the existing spillway. Since the earthen embankment would be overtopped during the SDF, it would be
armored to protect against failure caused by overtopping. Common armoring materials for this application
are articulated concrete blocks (ACB) and roller compacted concrete (RCG~. ACB are currently the
anticipated method for protecting the dam. In addition to protecting the dam, the ACB could extend to
below the water line on the upstream slope to provide wave protection. City personnel have indicated that
removal of vegetation within the current riprap is difficult and the use of ACB would provide for easier
maintenance.
Alternative 1c impacts to WOUS are essentially the same as Alternative 1b. The anticipated construction cost
of Alternative 1c is likely on the order of 20 to 30 percent less than for Alternatives 1a and 1b. One other
significant advantage of this option is that the increase in construction cost to pass the SDF including the
impacts from the failure of upstream dams is negligible. This could reduce the need for spillway capacity
upgrades to the upstream dams, providing significant cost savings and reduced environmental impacts that
could result from these upgrades.
Alternative 1d -For Alternative 1d (Single Spillway, Raise Top of Dam) as shown on Figure 15, the primary
spillway configuration would be similar to that of Alternative 1c; however, the top of the embankment would
be raised as necessaryto provide additional flood storage and prevent overtopping for the SDF. Raising the
dam embankment could be accomplished using earthfill and/or a parapet. A height increase of about 3 feet
• would be required to pass the SDF not considering upstream dam failures, while a height increase of nearly 6
feet would be necessary to pass the SDF including flow from upstream dam breaches. This alternative is
considered comparable in cost and impacts to WOUS to Alternative 1c; however, the incremental increase in
cost to pass the SDF considering the upstream breaches is more significant than for Alternative 1c.
Preferred ConfigurationAlternative -Based on engineering evaluations, the spillway configuration of
Alternative 1c is the recommended replacement strategy for the Lake Townsend Dam However, the
location within the existing footprint is not the recommended location. The Alternative 1c configuration is
believed to be among the least costly configuration evaluated, provides passage of the SDF including the
failure of upstream dams, and offers more long-term stability and protection to public health and safety.
As mentioned above, the location of the new spillway is not recommended within the existing footprint of
the dam Although permanent impacts to WOLJS would be less if constructed within the existing footprint,
the potential for disruption in public water supply is greater. To prevent disruptions in water supply for
Alternative 1, the use of the Randleman WTP and the Haw River Plant was considered and subsequently
determined to be an infeasible option. Currently, the Haw River Intake discharges into Lake Townsend,
which if drained or disrupted, would not provide additional water supply. Randleman will onlyprovide 25
mgd which is less than what Lake Townsend currentlyprovides; therefore, Randleman cannot substitute for
Townsend's water supply needs. Furthermore, Randleman WTP is not scheduled to be constructed until
2013. To prevent loss of water supply and dam failure at Lake Townsend, construction of the new intake and
pumpstation must begin in July 2007.
Other disadvantages of Alternative 1 are primarily related to impacts and stability concerns during
construction, protection of the Cit~s primary water supplythroughout construction, and cost. Because the
lake cannot be drained, this alternative would require a significant cofferdam constructed in the lake,
upstream of the existing spillway. This would not only increase the construction cost by as much as 20-30
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3: Alternatives Analysis Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
percent over the preferred alternative, but could create turbidity and water qualityproblems for the
construction of the cofferdam and other facilities in the lake. In addition, it is likely that disruptions in public
water supplywithdrawals will be necessaryto coordinate the construction of the cofferdam and diversion
facilities. Disruptions in public water supply does not meet the project's purpose and need. Furthermore,
given the size of the watershed, stream diversion through this cofferdam would also be more complex than
for Alternative 2, increasing construction cost and the potential for flooding of the construction site.
3.2.2 Alternative 2 -Preferred Alternative -New Spillway Downstream
of Existing Structure
As presented in Figure 16, Alternative 2 is similar to Alternative 1c except that the new spillway will be
constructed just downstream of the existing spillway. The existing dam and spillway is proposed to be used
as a cofferdam during construction of the new spillway. Any of the approaches for passing the SDF
(alternative designs a through d) presented in Alternative 1 could be utilized for Alternative 2; however, based
on the findings presented above, spillway replacement in conjunction with embankment armoring and
construction of an earthen dike across the emergency spillway (similar to Alternative 1c) is the preferred
configuration for Alternative 2. In addition to the replacement spillway, new earth embankments will be
constructed and tied into the existing dam and/or abutments at each side of the spillway.
The primary advantage of this alternative is disruptions in water supply withdrawals are not proposed and less
disturbances in the lake due to construction activity will be m;n;m;~~d. Another primary advantage of this
alternative is that the construction cost and complexity will be significantly less than for Alternative 1 since
the existing spillway can be used as the cofferdam during construction. It is believed that the construction
cost will be at least 20 to 30 percent less than for Alternative 1.
Since the new spillway and embankments will be outside of the existing footprint, the Army Corps of
Engineers has indicated that it will require an Individua1404 Permit and 401 Water Quality Certification.
There are approximately 0.80 acres of permanent impacts to WOUS under this alternative. However,
construction phase impacts will be easier to manage as the construction will occur completely in the "dr~'
with less oppomuuty to create turbidity or other adverse impacts in the Lake or downstream waters.
Impacts to the recreational use of Lake Townsend during construction are also m;n;m;~~d. Finally, because
diversion facilities are less complex, there is less potential for flooding of the construction site, which could
cause contamination of Reedy Fork Creek with soil, concrete, and other construction materials.
•
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• LAKE TOWNSEND DAM REPLACEMENT
INDIVIDUAL 4041401 PERMIT APPLICATfON AND SUPPORT DOCUMENT
4. AVOIDANCE AND MINIMIZATION
As described in the alternatives anlaysis, the applicant evaluated several design options for replacement of the
current deterioating structures in an attempt to avoid and minimi7P impacts to WOUS to the maximum
extent practicable. Based on engineering evaluations, environmental impacts, and costs, the preferred
alternative for the spillway, intake, and pumpstation is the least environmentally damaging praticable
alternative that meets the projects purpose of replacing the existing failing structures without disruption in
public water supply.
In order to m;n;m;7~ impacts to WOUS, the applicant will implement a strict erosion and sediment control
plan that includes installation of silt fencing, temporary silt traps, diversions, sediment basins, and rock check
dams, maintaining undisturbed vegetative buffets, and immediate soil and slope stabilization using temporary
and permanent vegetation. Reedy Fork Creek will be protected bya series of gabion baskets filled with straw
and stone and faced with geotextile fabric arranged around the work area to prevent cement from entering
the stream during dam construction. During the installation of the intake pipes, silt curtains will be used
within the reservoir to prevent silt and other materials from entering the water supply intake. During this
period, flow will only be released through the plant and backwash ponds to prevent this material from
entering the Reedy Fork Creek watercourse.
To minimi~P the disruption of the lake bottom, the three intake pipelines will be stacked vertically in one
• trench and supported every 40 to 50 feet between two piles. In order to avoid permanent impacts to the lake
bottom, the pipelines will be partially buried in the lake bottom and partially exposed in the reservoir,
depending on relative lake bottom and pipe elevations. The invert of the lowest pipe will rest a minimum of 3
feet above the lake bottom The end of each pipe will support a 48-inch tee with an exclusionaryscreen up to
216-inches long and abuilt-in air purging system.
Furthermore, the applicant proposes to avoid impacts to dowstream habitat by mainatining established
minimum flow requirements during and after construction. The replacement spillway will be designed to meet
these existing target minimum flows of 7.0 cfs when the lake is at or above full pool and 2.0 cfs when the lake
is below full pool, as described in section 4.8.4. The temperature of discharged water is not proposed to
change. However, in order to m;n;mi~P impacts to downstream habitats, the spillwaywill be desgined to
release colder and more oxygenated water, if necessary.
•
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LAKE TOWNSEND DAM REPLACEMENT
INDIVIDUAL 404/401 PERMIT APPLICATION AND SUPPORT DOCUMENT
5. CONSTRUCTION TECHNIQUES
5.1 Intake and Pump Station
A trench will be hydraulically dredged or dug "in the wet" to lay the intake pipelines. Support piles will be
driven to firm embedment as determined by soil characteristics and the rock elevation. Horizontal beams
between piles will support saddles or cradles for each pipe. Pipe will be secured to the piles and beams by
strapping. After each pipe is installed, the trench will be backfilled with a mixture of gravel andlor native
soils to the top of the pipe. Once the top pipe is installed the existing grade will be restored with a backfill
mixture including native soils. Additional protection of exposed pipe will be considered.
It should be noted that the area could be protected by a cofferdam and constructed in the dry. However, due
to the depth of water, size of support piling and sheeting, dewatering costs, and construction inhibited by
cross supports between the sheet piling walls, the intake piping most likely will be constructed in the wet.
Spoils from the dredging operation will be dewatered and stored inside erosion control measures on the
existing emergencyspillway. Some or all of the spoils will be reused as backfill. Any remaining spoils on the
emergency spillway will be graded and permanently stabilized by seeding f or erosion control.
5.2 Spillway
A 5,000 foot long construction access road is proposed to be constructed from Doggett Road, which will
require regrading approximately 4,000 feet of existing access road along a pipeline and power line easement.
The remaining 1,000 ft of road will be constructed through wooded areas with portions of the road alignment
along existing trails. A construction staging area is proposed on the south side of ReedyFork Creek between
the proposed toe of the dam and the existing roadway on the east side of the backwash ponds. The area will
be protected using a sediment basin, diversions, silt fence, gravel, and temporaryvegetation during
construction. The area not used for access road will be returned to grass after construction is complete.
The borrow area south of the emergencyspillwaywill be utilized fast and the borrow area north of the
spillway will be used if needed. Erosion and sediment control measures will include temporarysilt traps,
diversions, silt fences, undisturbed vegetative buffers, and temporary and permanent vegetation. All borrow
areas will be re-vegetated with hardwoods.
The existing emergencyspillwaywill be closed using an earthen dike or embankment constructed to the
planned top of dam elevation. 'This area will be protected using silt fence and permanent turf.
The existing dam will be used as a cofferdam during construction of the new spillway. Constrution sequence
will be generallyas follows:
^ Erosion, sediment and pollution control measures are proposed to be installed along ReedyFork Creek
and around limits of construction, including sediment basins, diversion dikes and ditches, silt fence, and
rock check dams.
^ Stream flow is proposed to be diverted through the gates at the south end of the existing spillway into the
stream while the northern portion of the new spillway is constructed. The construction area will be
protected with diversion dikes and cofferdams as necessary.
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5: Construction Techniques Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
The new north embankment will be constructed to tie into the existing dam and embankment armoring
. on the north side will be installed.
^ Once the northern portion of the spillway is constructed, flow is proposed to be diverted through the
gates at the north end of the existing spillway and through the newly constructed structure (either through
sluice gate(s), gated sections, or over concrete slabs through unconstructed portions of the labyrinth weir).
The construction area will be protected with diversion dikes and cofferdams as necessary.
• The new south embankment will be constructed to tie into the existing dam and embankment armoring
on the south side will be installed.
The gates on the new spillway structure are proposed to be closed and impounding between the existing
and new spillways will begin.
^ Silt curtains will be installed in the reservoir around the existing spillway and portions of the embankments
will be removed.
^ Portions of the existing dam and spillway impeding hydraulic capacity of new spillway are proposed to be
removed. During demolition and excavation, base flow will be released through the plant, backwash
ponds, and sediment basins to prevent debris and concrete materials from entering the Reedy Fork Creek
watercourse.
Given the anticipated construction period of one to two years, normally a contractor would provide for
diversion facilities to protect the work for storms up to the 10 year storm event. All erosion and sediment
control measures utilized during construction will be included in a plan that is approved by State and Local
agencies. All measures will be designed in accordance with the latest North Carolina Erosion and Sediment
Control Manual.
Material including cleared and grubbed timber, construction debris, materials removed during demolition, and
excavated soils not used in the new construction will be disposed of in approved on-site or off-site locations
in accordance with local and state requirements.
• ---
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~ p 4 1
LAKE TOWNSEND DAM REPLACEMENT
INDIVIDUAL 404/401 PERMIT APPLICATItJN AND SUPPORT DOCUMENT
6. JURISDICATIONAL IMPACTS
6.1 Direct Impacts
The new intake will require placement of 320 feet of pipe in Lake Townsend, temporarily impacting 0.6 acre
(15,000 cubic yards) of the lake bed. The new spillway and dam embankments will require f ill of 4,000 cubic
yards in ReedyFork Creek, impacting 0.6 acre of the stream bed and 0.2 acre of adjacent wetlands. These
proposed impacts represent the minimum feasible impact to meet the projects purpose and need. Since the
total impact to jurisdictional waters is greater than 0.5 acre and the structures are being constructed outside of
the existing footprint, the project will require an Individual Section 404 Permit and 401 Major Water Quality
Certification.
6.2 Secondary and Cumulative
The proposed intake and spillway replacement will not affect the water elevation, volume, safe yield of Lake
Townsend, or Greensboro's potable water production capacity. The project is intended only to mitigate the
ongoing risks of dam safety, water supply safety, and flood passage. It is not agrowth-inducing project, as no
additional water supply capacity is added, and thus this project has no indirect and cumulative (secondary)
impacts of induced growth.
•
•
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oz•oa 10
LAKE TOWNSEND DAM REPLACEMENT
INDIVIDUAL 404/4Q1 PERMIT APPLICATION AND SUPPORT DOCUMENT
7. COMPENSATORY MITIGATION PLAN
7.1 Mitigation for Direct Impacts
Mitigative measures have been incorporated into this project throughout the alternative selection and design
process, and further measures will be implemented during project construction and long-term operation. The
proposed labyrinth spillway design will place the new spillway immediately downstream of the existing
deteriorating spillway, thus m;n;r„;~;ng the length of stream to be impounded and the amount of clearing and
fill required for dam tie-in embankments. It will also eliminate the need for the auxiliary spillway, which will
no longer need to be maintained and will be left to regenerate as natural forest. Efforts are underwayto
identifyonsite oppomxnities for WOUS mitigtion. If onsite mitigation is not available, then permanent
WOUS impacts will most likely be provided in the form of in-lieu fee payments to the NC Ecosystem
Enhancement Program.
7.2 Mitigation for Indirect and Cumulative Impacts
This project will not affect the water elevation, volume, safe yield of Lake Townsend, or the City:s raw water
intake and treatment plant capacities. The project is replacement in-kind, intended only to mitigate the
ongoing risks of dam safety, water supply safety, and flood passage. It is not agrowth-inducing project, as no
additional water supply capacity is added, and thus this project has no secondary and cumulative impacts
related to growth.

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o~t•o~7o
LAKE TOWNSEND DAM REPLACEMENT
INDIVIDUAL X04/401 PERMIT APPLICATION AND SUPPORT DOCUMENT
8. ENVIRONMENTAL INFORMATION
8.1 Environmental Documentation
The Lake Townsend Dam Replacement project is required to obtain a Finding of No Significant Impact
through the North Carolina State Environmental Policy Act (SEPA). A scoping letter was submitted to the
State Clearinghouse on December 18, 2006 to obtain initial agency comments and concerns regarding the
project. Minor comments, which are located in Appendix B, were received and subsequently addressed in an
environmental assessment (EA). The EA was completed and submitted to Jim McRight, the project's SEPA
Coordinator, for inter-agency review on February 12, 2007. Based on the extent of the inter-agency review
period, it is anticipated that the Final Draft EA will be submitted to the State Clearinghouse in March and a
FONSI issued in May 2007.
8.2 Wetland Delineation
RJG&A biologists Gerald Pottern, Jessi ONeal and Sean Doig surveyed for jurisdictional wetlands and
waters in all proposed construction areas including the intake and spillway areas, Reedy Fork Creek floodplain
below the dam, access road and borrow pit areas during August to September 2006 and January 2007.
Jurisdictional boundaries were identified based on the USAGE Wetlands Delineation Manual (Environmental
Laboratory, 1987) and supplementarytechrucal literature for hydrophytic vegetation, hydric soils (Figure 4),
and hydrology indicators. These boundaries were delineated, marked with sequentially numbered flags, and
mapped using a Trimble GeoXT GPS unit with sub-meter accuracy and ArcView software. RJG&A is
currently coordinating with the USAGE to confirm the jurisdictional delineation. The wetland delineation
data sheets are located in Appendix C.
Jurisdictional wetlands occur on the ReedyFork Creek floodplain north and south of the creek North of the
creek an tunnamed tributary is impounded by several beaver dams, forming an extensive complex of alluvial
hardwood forest, shrub/scrub, marsh, and open water extending northward to the auxiliaryspillwayoutlet and
beyand (Figure 7). This wetland is contiguous with Reedy Fork Creek, and its soil is mapped as Chewacla sandy
loam Hydrology is maintained bya combination of surface flowfromthe tributaryand seepage from adjacent
uplands. Floodwaters from Reedy Fork Creek may enter this wetland during major storms, but this source is
probably not important to maintaining wetland hydrology. Predominant trees in the forested portions include
sweetgum (Lzquidambar styraciflua), tulip poplar (Liriodendron tul pifera), synamore (Platanus occidentalis), red maple
(Ater rubrum), green ash (Fraxinus pennsylvanica), American elm (Ulmus americana), willow oak (,Quercus phellos), water
oak (Quercus pigra), swamp chestnut oak (,Quercus michauxiz), shagbark hickory (Carya ovata), and loblolly pine
(Pinus taeda). Understory trees and shnrbs include southern sugar maple (Ater floridanum), boxelder (Ater negundo),
musclewood (Carpinus caroliniana), silkydogwood (Corpus ammomum), spicebush (Llndera ben~oin), Chinese privet
(Ligustrum sinense), and autumn olive (Eleagnus umbellata). Japanese honeysuckle (Lonicera japonica), poison ivy
(Toxicodendron radians), greenbriers (Smilax spp.), false nettle (Boehmeria cylindrica), jewelweed (Impatiens capensis),
giant cane (Arundinariagigantea), and Christmas fern (Polystichum acrostichoides) comprise the groundcover layer.
The scrub and marsh areas beneath the powerline and areas deforested by beavers are dominated by cattail
(Typha latifolia), wooly bulnuh (Scirpus cyperinus), soft rush (]uncus effusus), sedges (Carer and Cyperus spp.),
knotweeds (Polygonum spp), stilt grass (Microstegium vimineum), water primrose (Ludp~igia spp), Asian dewflower
•
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8: Environmental Information Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
(Murdannia keisak), buttonbush (Cephalanthus occidentalis), tag alder (Alms serrulata), and saplings and stump
sprouts of canopytrees.
Two additional wetlands occur south of the creek near the WTP backwash settling pond, but these are well
beyond the proposed construction areas (Figure 7). No wetland occurs in the vicinity of the proposed intake
and pump station, where the lake shoreline is rather steep. Likewise, no wetland or stream crossing was found
along the construction access road corridor or the borrow pit areas.
ReedyFork Creek and Lake Townsend are non-wetland jurisdictional waters. At the foot of the stilling basin
wall ReedyFork Creek is 250 feet wide, and abruptly narrows to an average 50 feet wide just downstream
There are two areas of herb/scrub vegetation growing in a mix of rock fill material with accumulated sand and
soil on either side of ReedyFork Creek just below the stilling basin wall. Theses two areas are within the "normal
high water'' of Reedy Fork Creek, and are thus part of the non wetland stream channel, rather than wetlands.
Reedy Fork Creek is shallow (1 to 3 feet) with a sand and cobble bed for about 200 feet beyond the stilling
basin, then becomes deep (4 feet plus) due to multiple beaver impoundments and log jams downstream The
next two miles of Reedy Fork Creek is a wide system of braided channels through marsh and scrub habitat
maintained by beavers, ending in the open marshypool of HardyMillpond. The next ten miles of Reedy Fork
Creek from below HardyMillpond to its confluence with Buffalo Creek is a typical free-flowing Piedmont
stream, mostly35 to 50-feet wide, with varying substrata including bedrock, cobble, gravel, sand, silt, and clay.
8.3 Stream Assessment
Free-flowing reaches of Reedy Fork Creek between HardyMillpond Dam and Buffalo Creek support a
diverse assemblage of typical Piedmont region warmwater stream fishes including redfin pickerel (Esox
americanus), bluehead chub (Nocomis leptocephalus), creek chub. (Semotilus atromaculatus), rosyside dace (Clinostomus
funduloides), white shiner (Luxilus albeolus), sandbar shiner (Notropis scepticus), satinfin shiner (Cyprinella analostana),
golden shiner (Notemigonus crysoleucas), creek chubsucker (Erimy~on oblongus), silver redhorse (Moxostoma collapsum),
brown bullhead (Ameiurus nebulosus), margined madtom (Noturus insignis), eastern mosquitofish (Gambusia
holbrooka), speckled killifish (Fundulus rathbuna), redbreast sunfish (Lepomis auritus), green sunfish (Lepomis cyanellus),
bluegill (Lepomis macrochirus), pumpkinseed ~Lepomisgibbosus), black crappie (Pomoxis nigromaculatus), largemouth
bass (Micropterus salmoides), piedmont darter (Percina crassa), and tesselated darter (Etheostoma olmsteda), based on
Menhinick (1991), NGDWQ fish surveys, and staff observations during our field survey.
Abundant mussel populations were noted in several segments along Reedy Fork Creek (Figures 6a and 6b),
especiallywithin the first mile downstream of HardyMill Dam These populations show a wide range of age
classes from young to old, indicating good survival and reproduction. River mussels observed infree-flowing
segments below Handy Mill Dam include eastern elliprio (Elliptio complanata complex), variable spike (Elliptio
icterina complex), paper pondshell (Utterbackia imbecilis), triangle floater (Alusmidonta undulata), notched rainbow
(Villosa constricta), and eastern creekshell (Villosa delumbis). The triangle floater and notched rainbow mussels are
state protected as threatened and special concern, respectively. NC Natural Heritage Program (NHP) did not
have previous records of these rare species in ReedyFork Creek or Guilford Countyprior to our data
submission. Other mollusks observed include the Asian clam (Corbicula fluminea) and the snails Elimia Proxima,
Leptoxis carinata, and Campeloma decisum.
The impressive success of mussels in this reach is presumably due to high levels of food production in the
marshes above Hardy Mill Dam, and perhaps low flow maintenance afforded by seepage from this old stone
dam during droughts. The owner of Hardy Mill Dam told staff that a local biological supply company
collected several buckets of mussels a few times each year from this site. The severe drought of 2002
apparently did not adversely affect these mussels, as the age of the mussels indicates their presence prior to
that drought year. Between June and August 2002 the USGS gage near Gibsonville several miles downstream
recorded 62 days when daily mean flow was less than 3.0 cfs, including 13 days when flow was less than 1.0
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S: Environmental Information Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
cfs. Prior to 2002, a daily mean flow less than 1.0 cfs was last recorded at this gage in 1955. The aquatic
community of Reedy Fork Creek thus appears well adapted to periodic drought conditions.
8.4 Wildlife
The project site contains a diversity of habitats for wildlife. Scrub habitats may harbor diverse wildlife, including
Fowler's toad (Bufo 2voodhousea), black racer (Coluber constrictor), rough green snake (Opheodrys aestiva), copperhead
(Agkistrodon contortrix), fence lizard (Sceloporus undulatus), bobwhite (Colinus vi~inianus), towhee (Pipilio
erythrophthalmus), junco (Junco hyemalis), white throated sparrow (Zonotrichia albicollis), Carolina wren (Thryothorzrs
ludovicianus), short-tailed shrew (Blaring carolinensis), white-footed mouse (Peromyscus leucopus), cotton rat (Sigmodon
hispidus), woodland vole (Microtuspinetorum), and red fox (Vulpes vulpes).
Upland hardwood and pine/hardwood forests support diverse animal communities. Typical amphibians and
reptiles include the spotted salamander (Ambystoma maculatum), slimysalamander (Plethodonglutinosus), gray
treefrog (Hyla chrysoscelis), American toad (Bufo americanus), box turtle (Terrapene caroling), five-lined skink (Eumeces
fasciatus), fence lizard (Sceloporus undulatus), black rat snake (Elaphe obsoleta), black racer (Coluber constrictor), garter
snake (Thamnophis sirtalis), copperhead (Agkistrodon contortrix), and kingsnakes (Lampropeltis spp.). Birds of upland
Piedmont forests include sharp-shinned hawk (Accipiterstriatus), downywoodpecker (Picoides pubescens), sapsucker
(.Sphyrapicus varius), rub crowned kinglet (Regulus calendula), manywarblers (Parulidae), and manyfinch and
sparrow species (Fringillidae). Upland forest mammals likelyto occur in the project area include the raccoon
(Procyon lotor), opossum (Didelphis virginiana), graysquirrel (Sciurus carolinensis), white-footed mouse (Peromyscus
leucopus), red bat (Lasiurus borealis), evening bat (Nycticeius humeralis), short-tailed shrew (Blaring carolinensis),
southern flying squirrel (Glaucomys volans), woodchuck (Marmota monax), white-tailed deer (Odocoileus virginianus),
and bobcat (Felis rufus).
Alluvial forest and scrub habitats generallyhave high biological productivityand support diverse animal
communities. Amphibians may include brook salamanders (Eurycea spp.), marbled salamander (Ambystoma
opacum), cricket frog (Acris crepitans), upland chonu frog (Pseudacris triseriata), and many other frog and toad
species (Rana, Hyla, and Bufo spp.). Alluvial forest reptiles in the project area include most of the upland species
previously listed, plus the ringneck snake (Diadophus punctatus) and ribbon snake (Thamnophis sauritus). Many birds
depend on floodplains, including the yellow billed cuckoo (Coay~us americanus), barred owl (Stria varia), wood
thrush (Hylocichla mustelina), red-shouldered hawk (Buteo lineatus), warblers (I'atulidae), turkey (Meleagrisgallopavo),
and woodcock (Scolopax minor). Typical floodplain mammals include many of the upland species and semi-
aquatic species previouslylisted, plus the grayfox (Urocyon cinereoargenteus), golden mouse (Ochrotomys nuttalla), and
silver-haired bat (L.asionycteris noctivagans).
8.5 Threatened and Endangered Species
Of the numerous threatened and endangered wildlife species known to occur in North Carolina, no federally
listed threatened or endangered species have been reported in the project area. The following sections
discuss protected species known to occur in Guilford County, their habitats, and whether habitat is sufficient
for these species on the project site.
8.5.1 Protected Species Known from Guilford County
The N G Natural Heritage Program (NHP) has records of 15 rare plant or animal species reported from
Guilford County, of which five are protected byfederal or state laws. One, the bald eagle (Haliaeetus leucocephalus)
is federallylisted as T-PD (threatened, proposed for de-listing) and state listed as threatened (I~. Four Guilford
Countyspecies are state listed as special concern (SG): the mole salamander (Ambystoma talpoideum), Greensboro
burrowing crayfish (Cambarus catagius), Carolina darter (F_theostoma Collis), and loggerhead shrike (L~cnius

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8: Environmental Information Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
ludovicianus). The remauung ten rare species known from Guilford County are plants designated byNHP as
significantlyrare (SR), and are not legallyprotected.
NHI' has no records of these rare species on the Browns Sumrnit USGS topographic quadrangle where the
project is located (NHP website: http://ils.unc.edu/parkproject/nhp/index.html). The onlyrare species
reported byNHP on the Browns Summit quadrangle are four-toed salamander (Hemidactylium scutatum, State SG)
and Carolina ladle crayfish (Cambarus davidi, State SR) both of which are reported in Rockingham Countyseveral
miles north of Lake Townsend. Neither is known from Guilford County, according to NHI'.
RJG&A biologists Gerald Pottern and Jessi O'Neal surveyed the dam and intake construction areas, access road
corridor, and borrow pit areas during August to September 2006 and January 2007 for protected species and
their potential habitats. Habitat requirements and surveyresults for each protected species are reported below.
During stream habitat investigations downstream of Lake Townsend, three rare species of river mussels not
previouslyreported from Guilford Countywere encountered, two of which are state protected: triangle floater
(Alasmidonta undulata, State T), notched rainbow (Villosa constricta, State SG), and eastern creekshell (Villosa
delumbis, State SR). Since min;mum flow will be maintained, no impacts to these are proposed.
8.5.2 Protected Species Habitat Descriptions and Potential Impacts
Bald Eagle (h'aliaeetus leucocephalus) -Federal Threatened (Proposed Delisting); State Threatened -
The bald eagle requires large rivers, lakes, or estuaries for feeding, and stands of mature trees near the water for
roosting and nesting (Potter et a1.,1980). Bald eagles frequentlynest and roost at Lake Townsend, but no
roosting or nesting areas are reported in the immediate vicinity of the dam or northeastern shoreline (NHI'
records). No evidence of eagle roosting or nesting was observed during our field reconnaissance of the dam
and access road area, and the trees that will be removed for construction of the dam, road, and borrow pits are
generally too small to serve as good roosting and nesting habitat for eagles. Bald eagles will probably avoid the
dam area during construction activities, but otherwise no adverse impacts to the lake's eagle population is likely.
Loggerhead Shrike (Lanius ludozicranus) - Federal No Status; State Special Concern -The loggerhead
shrike prefers open fields with short vegetation and scattered small trees, fences, or utilitywires that serve as
perches for hunting small animals. It occurs throughout the year in Guilford County, and nests 8 to 15 feet
above the ground in dense, often thorny shrubs or small trees adjacent to fields during March and April (Potter
et x1.,1980). Suitable nesting and foraging habitat for the loggerhead shrike occurs along the powerline and gas
line corridors near Doggett Road, the emergency spillway, and the WTT' area, but no shrikes, nests, or evidence
of shrike feeding were observed. No nesting sites are known in the project vicinity (NHI' records).
Construction disturbance to shrike habitat will be minor and temporary. Following construction, the disturbed
areas will continue to provide suitable habitat, and no long-term impacts are expected.
Mole Salamander (Ambystomatalpordeum) - Federal No Status; State Special Concern -Adult mole
salamanders live in burrows under logs and boulders in forested areas, and breed during winter and earlyspring
in nearbyfish-free vernal pools (Martof et x1.,1980). The breeding pools maybe floodplain depressions, seeps,
or upland depressions. The bush gilled larvae feed on aquatic invertebrates and metamorphose in summer and
earlyfall at a length of 55 to 70 mm Some individuals may overwinter as larvae and transform the following
spring. The wetlands northeast of Lake Townsend Dam are impounded by beavers and contain abundant
mosquitofish and pickerel, making these waters unsuitable for mole salamander breeding. No suitable breeding
pool habitat occurs in the project construction area, and without breeding habitat adults are unlikely to occur
here. Consequently, no adverse impact to the mole salamanders is expected.
Carolina Darter (Etheostomacollis) - Federal No Status; State Special Concern -The Carolina darter
inhabits backwater areas near the banks of small to medium size free-flowing streams with mixed substrata of
sand, mud, and cobble, usually with deposits of leaves, branches, or roots, and a light layEr of silt. The Carolina
darter is known from the upper Haw River in northwestern Guilford County and Haw River tributaries in
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8: Environmental Information Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
Alamance and Cluatham Counties; there is no Guilford Countyrecord of this fish in ReedyFork Creek or its
tributaries (Menhinick and Braswell,1997; NHP records). The stream segment between Lake Townsend Dam
and HardyMillpond Dam two miles downstream is mostlyimpounded and not free-flowing, and probablynot
suitable for the Carolina darter. No sampling for Carolina darters was conducted. Unknown populations may
occur in Reedy Fork Creek downstream of Hardy Millpond, but are unlikely to be affected by this project.
Greensboro Burrowing Crayfish (Cambanss c<rtagius) - Federal No Status; State Special Concern -The
Greensboro burrowing crayfish occurs on floodplains, which maybe forested, scrub, or even lawn. It remains
in burrows most of the time, emerging to feed at night during wet weather. Due to its cryptic behavior, it is
difficult to conduct surveys to assess the presence or absence of this crayfish. NHP has no record of this animal
on the Browns Summit quadrangle, but unknown populations could occur here, possibly including the Reedy
Fork Creek floodplain in the proposed spillway construction area. Potential project impacts to this crayfish are
unknown, but potential habitat for this species is abundant along the remainder of ReedyFork Creek and
tributaries downstream
RiverMussels (Alasmla'ontaundulataand Uallosaconstrict~ - Federal No Status; State T and SC -The
triangle floater (Alasmidonta undulata, State Threatened), notched rainbow (Villosa constricta, State Special
Concern) are river mussels not previouslyreported from Guilford Countyuntil our stream habitat surveyfor
this project in August 2006. These species and the eastern creekshell (Villosa delumbis, State SR) were found at
several sites between the NG29 bridge (immediately downstream of HardyMillpond) and the confluence with
Buffalo Creek ten miles downstream All three require free-flowing streams with mixed substrata of sand, gravel,
and cobble (Adams et a1.,1990). The stream segment between Lake Townsend Dam and HandyMillpond Dam
two miles downstream is mostly impounded and not free-flowing, and probably not suitable for these mussels.
No river mussels were seen in the segment of ReedyFork Creek where the new spillwaywill be constructed.
Based on lack of suitable habitat, these species are unlikelyto occur here. The populations downstream of
HardyMillpond are unlikelyto be affected bythis project.
• 8.6 Cultural and Historic Resources
A scoping letter describing the project and a map depicting the proposed intake and dam improvements,
construction access road, and borrow pit areas was submitted to the State I~istoric Preservation C-ffice
(SHPO) for project review and comment. SHI'O has no record of significant archaeological or historic
resources in the immediate project vicinity, and did not request a survey for cultural resources. The scoping
response letter from SHPO is included in Appendix B.
8.7 FEMA
The Federal Emergency Management Agency (FEMA) Flood Insurance Rate Maps (FIRM)) for Guilford
County dated June 4, 1980 (Community Panel Number 370111 0065B) was reviewed for 100-year floodplain
locations in relation to the project. A 100-year floodplain exists within the project area (Figure 3).

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LAKE TOWNSEND DAM REPLACEMENT
INDIVIDUAL 404/401 PERMIT APPLICATION AND SUPPORT DOCUMENT
9. LIST OF ADDITIONAL ENVIRONMENTAL PERMITS
The following permits or approvals will be required prior to the implementation of the Project.
Authorization to Construct Permit (ATC) - An ATC permit application will be submitted to the NC
Division of Environmental Health, Public Water SupplySection for review and approval.
Erosion and Sediment Control Pernut - Prior to land disturbing activities, plans and specifications will be
submitted to the NC Department of Land Resources (DLR) for review and approval of an Erosion and
Sediment Control Permit.
Dam Safety Permit - An application will be submitted to the NC Department of Environmental and
Natural Resources (ENR) for approval of a Dam SafetyPermit.
401 Major Water Quality Certification - A 401 permit application will be submitted to the NC Department
of Water Quality (DWQ) for review and approval.
Guilford County Permits -The pump station design plans will be submitted to the Guilford County
Planning Department to obtain final site plan approval. In addition, design plans will be submitted to the
Executive C-fficer for review and approval of a building permit, grading permit, and floodplain permit.
Asbestos Demolition Notification -The applicant will coordinate with the Asbestos Program (919) 707-
5950 prior to demolition of any asbestos containing materials.
Any additional permits required for demolition, construction, clearing and/or burning will be obtained by the
appropraite regulatory authority.

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•
FIGURES
•
•

~fi'~'0 4 1 0
Lake Townsend N
_r~, Proposed Construction Access Road
' ~"~i ' Limits of disturbance for borrow areas to obtain
Lake Townsend ~ - 0 fill for new embankments
Dam
- Limits of disturbance for embankment through
Guilford County i ~ -emergency spillway
Limits of disturbance for dam and spillway removal and
® reconstruction, including construction staging areas
f CY ~~ 1.
• ~ i ~ -I .. 'y 4T ~ F ,_„~ - ,~ ~.s.•u~" r ~4'.r ~ - Kiryf~-"lr'..-
~~~ 1~ ~ , ~~_~-1 ,~g/~ IIII~t'~ {etY J.i ~ i ~• I~l' ~'~f . r"'-~ ~r +I"' - _
'~,: Doggett Road I 1 ~ ~ ~~t j -x-~ - ; ~. -
"'~` ~. i,- `.\~ }` _ ~4. ~~ l~ ~~ti fffr 4 fr,~ Jr ~ •~~ •'~1^,r~'.p I Jf~ ~ r - -~ ,
I `~T ~.. y-.ice, `, E ~ . ~ /, ~,; T~
~~~,, E 'J 4~ i1 ~`.-'. ``--~1 _~, 'M tJJ~ New Intake ~ ~ ~' •~,
_ ,.
,~ ~ ,ti... _ `` y', ~', Structure `' ~,
,~( ,
'r , ~ f ~:` Lake Townsend -, ~~.~'
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REENS64~ Greensboro, NC 27406 Lr~KE "I'O~~':~]SEND DAi11 REPL.ACEb1ENT PROJECT

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J Greensboro, NC 27406 L.~1KE TO~~'I~ISEND DA~i REPI.ACE~tENT PROJECT

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Water Resources Department^ Creek from Lake Townsend Dam to
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2602 S. Elm-Eugene Street^
Greensboro, NC 27406 Lr1KE TOWNSEND DAM REPLACEMENT PROJECT

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Greensboro, NC 27406 Lr1KE TOWNSEND DAl~1 REPLACEMENT PROJECT

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N560R0 Greensboro, NC 27406 LAKE TOl~1VSEND D~1bi REPL~1CEb-LENT PRL•JECT

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PUMPING
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................................................................................................................................................. i............................................... .............................................................,................ ..........................................................o............
48' INTAKE PIPE
sl I I 48' INTAKE PIPE
E
3 ..............................................._................................................_................................................:.................................................:......................................................._.._................................_...:...........................;.......690......, `a'~ ~`,°`, ao
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SCALE'. HOAR. 1'=20' VERT. 1'-0'
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3
o City of Greensboro Preferred Alternative 3: Shoreline Intake Multilevel Pipeline, Profile View
o Water Resources Department Figure 11B
s 2602 S. Elm-Eugene Street LAKE TOWNSEND DAM REPLACEMENT PROJECT
Greensboro, NC 27406

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Vi~ater Resources Departtnent
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Ureenshoro,'VC 2740(
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LABYRINTH SPILLWAY

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Figure 12
LAkE TOWi~SENb I)1~4 REPLACEMEI\T PROJECT
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r City of (7reenshoro
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Ureenshoro, VC 2?40(
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Figure 13
LAKF. TOWI~SENI) DA~1~i RF;PLAC;FMEa~`T l'RU~E;GT
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SPILLWAY
i r City of Greens}xxo
Water Resource; Department
2602 S. E:lm-E:u~ene Street
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LAKE TUI~TSE1\'ll llANI REPLACENIET\T PK()JEGT
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Figure 14

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P City of Greensboro
Water Resources Department
I 2602 5. E:lrn-Hugene Street
Greensboro, VG Z?40G
llam and Spillway Alternative 1 d: Sin~~lc Spillway, Raise Top of llam
LAKE TOWI~SENI) l)A~4 RE~I'LACEMEIN'T PROJ1~:CT
07.0410
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ATED T EITHER END OF SPILLWAY)
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EXISTING SPILLWAY AND DAM TO BE USED AS l
COFFERDAM DURING CONSTRUCTION OF I
REPLACEMENT DAM AND SPILLWAY. TO BE
DEMOLISHED AS NECESSARY TO FACILITATE
HYDRAULIC PERFORMANCE OF NEW SPILLWAY
I
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City of Greenslxiru
Water Resource; Department
2fiQ2 S. Film-fiu~ene Street
Greensboro, VC 2?40h
0 4oa
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1
1)am and Spillway Alternative 2: (Preferred} Single Spillwa~~, Amcor Embankmcnt,1)ownstream Location
LAKE TO't~rSEND DAM REPLAGE1~~fEI~'T PROJE(;'C
Figure 16
d

Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
•
APPENDIX A
Adjacent Property Owners
•
•
_~ __
P:\GreensborolTownsend Dam-130603\Permittingllndividual Permit\Individual Permit Support Documentv4.doc

Gregory & Sharen Thompson G-T Gateway Llc Reedy Fork Associates LLC
or Current Resident or Current Resident C/O Starmount Company
or Current Resident
19 Snowgoose Cove 1325 Ivy Ave 600 Green Valley Rd Suite 300
~sboro, NC 27455-1361 Winston Salem, NC 27105-0000 Greensboro, NC 27408-0000
Reedy Fork Associates LLC Cone Denim LLC Carolyn & Dorothy Mcnairy Family
C/O Starmount Company C/O Wl Ross & Co Llc Limited Partnership
or Current Resident or Current Resident or Current Resident
600 Green Valley Rd Suite 300 101 East 52Nd St 19Th Floor 5225 Church St
Greensboro, NC 27408-0000 New York, NY 10033-0000 Greensboro, NC 27455-0000
Carolyn & Dorothy Mcnairy Family Carrolland Corporation Storrington Homeowners Assoc.
Limited Partnership C/O Old South Home Co
or Current Resident or Current Resident or Current Resident
PO Box 9846
5225 Church St Greensboro, NC 27429-0000 PO Box 9846
Greensboro, NC 27455-0000 Greensboro, NC 27429-0000
Storrington Homeowners Assoc. Lakeshore Village Homeowners Mr. Major S. Jr. & Oza H Sanders
C/O Old South Home Co Association Inc
or Current Resident or Current Resident or Current Resident
PO Box 9846 PO Box 26565 7451 Doggett Rd
Greensboro, NC 27429-0000 Greensboro, NC 27415-6560 Browns Summit, NC 27214-9655
Loyce Phillips Ellis & Paula June Bates Mr. Russell L & Michelle P Ingold Mr. Stephen A & Lisa C Sherman
or Current Resident or Current Resident or Current Resident
& Steven Marion Ellis 6602 Lismore Dr 5431 Doggett Rd
Browns Summit, NC 27214-9636 Brown Summit, NC 27214-0000 Browns Summit, NC 27214-0000

Mr: Raymond L & Carolyn W Flowers Wedgewood Investment Corp Mr. Curtis Ray & Clara B Holmes
or Current Resident or Current Resident or Current Resident
5014 Yanceyville Rd PO Box 14215 1104 Dover Rd
Browns Summit, NC 27214-9635 Greensboro, NC 27415-4215 Greensboro, NC 27408-7314
Salvatore Pelligra & Edith V Gilmore Mr. Joseph Clay Smith Mr. David J & Trina P Thompson
or Current Resident or Current Resident or Current Resident
213 E Avondale Dr 1800 Northbay Dr 1718 Northbay Dr
Greensboro, NC 27403-1045 Browns Summit, NC 27214-0000 Browns Summit, NC 27214-9680
Mr. Gregory U & Lauren J H Twyman Mr. Carl C Iris Bush Mr. William Joseph V Welborn
or Current Resident or Current Resident or Current Resident
108 Arcaro Dr 6389 Lowe Dr 3405 Green Needle Dr
Greensboro, NC 27455-0925 Randleman, NC 27317-8053 Greensboro, NC 27405-0000
Cape Wedgewood Inc Cape Wedgewood Inc Ms. Brenda W Liles
C/O C B Sperry or Current Resident or Current Resident
or Current Resident PO Box 14215 5008 Yanceyville Rd
PO Box 14215 Greensboro, NC 27415-4215 Brown Summit, NC 27214-0000
Greensboro, NC 27415-4215
l~pseph G Stuffs & Joseph C Mathes Mr. Timothy J & Ronda W Campbell Mr. Mohamad Keshavarz & Fariba Shahri
ent Resident or Current Resident or Current Resident
155 Wolfetrail Rd 4921 Yanceyville Rd 6077 Windsor Farme Rd
Greensboro, NC 27406-9258 Browns Summit, NC 27214-9209 Summerfield, NC 27358-0000

Mr. Dorothy R Wyrick Mr. Joseph G Stuffs & Joseph C Mathes Mr. and Mrs. W C & Arabadella Allen
or Current Resident or Current Resident or Current Resident
4900 Yanceyville Rd 155 Wolfetrail Rd 4610 Yanceyville Rd
~s Summit, NC 27214-9209 Greensboro, NC 27406-9258 Browns Summit, NC 27214-9625
Mr. and Mrs. Paul Jr & Mary L Foulks
or Current Resident
4304 Summit Ave
Greensboro, NC 27405-0000
Cape Wedgewood Association Inc
C/O Marvin L Borum
or Current Resident
405 Parkway Dr # D
Greensboro, NC 27401-0000
Cape Wedgewood Inc
C/O C P Sperry
or Current Resident
PO Box 14215
Greensboro, NC 27415-4215
Mr. John Calvin Matthews
or Current Resident
417 Archergate Rd
Browns Summit, NC 27214-9630
Nancy Archer Chrismon
or Current Resident
502 Archergate Rd
Browns Summit, NC 27214-9630
Ms. Rachel G Heirs Norton
C/O Peter B Norton Exec
or Current Resident
4829 Nc 150 East
Browns Summit, NC 27214-9623
A J Heirs Summers
or Current Resident
5416 N Church St
Greensboro, NC 27455-1359
Mr. Charles G & Karen L Sims
or Current Resident
7709 Beckett Rd #B
Browns Summit, NC 27214-9656
Hidden Lake Farm Homeowners Assoc Inc Mr. William Joseph Cudworth
or Current Resident or Current Resident
2400 Farm Gate Rd 6211 Bards Lane
Browns Summit, NC 27214-0000 Brown Summit, NC 27214-0000
Mr. Clarence B & Mildred G Sperry
or Current Resident
6328 Cape Wedgewood Cir
Browns Summit, NC 27214-9692
Mr. Harold M & Linda A Nash
or Current Resident
PO Box 14184
Greensboro, NC 27415-4184
Mr. Robert P & Sarah S Correll
or Current Resident
4503 Blue Violet Dr
Greensboro, NC 27410-8863
Mr. Robin G & Annis H Henning
or Current Resident
205 Ariel Farm Rd
Greensboro, NC 27455-0000
Ms. Mrytle L Beane
or Current Resident
214 Meadowood Rd
Greensboro, NC 27409-2304
Ms. Ann S Hilliard & Gladys S Bowman
or Current Resident
2725 Minden Rd
Pleasant Garden, NC 27313-9233
Mr. and Mrs. Herbert B & Lorine J Archer Reedy Fork Baptist Church
or Current Resident or Current Resident
406 Archergate Rd 4709 Yanceyville Rd
Browns Summit, NC 27214-9630 Browns Summit, NC 27214-9208
Reedy Fork Baptist Church
or Current Resident
4709 Yanceyville Rd
Browns Summit, NC 27214-9208
Mr. Johnnie P & Nettie E Allgood
or Current Resident
4 Pence Ct
Greensboro, NC 27455-2820
Duke Power Co Tax Dept-PbOSB
or Current Resident
422 S Church St
Charlotte, NC 28242-0001
Mr. Robert Carl Jr & Bobbie P Dunn
or Current Resident
7516 Oak Valley Ln
Brown Summit, NC 27214-0000
W O Doggett
or Current Resident
2452 Oxford Rd
Raleigh, NC 27608-1538
Morgan Holdings LLC
or Current Resident
1200 Thetford Ct
Colfax, NC 27235-0000
~ms Development Inc Mr. Donald E & Ann B Richmond Mr. Samuel E Bridges & Leisa Kay
ent Resident or Current Resident or Current Resident
PO Box 711 2801 Brookledge Ct 370 Air Harbor Rd
Summerfield, NC 27358-0711 Browns Summit, NC 27214-9659 Greensboro, NC 27455-0000

Marlene H Cato Trustee Mr. Edward M Sharp Lake Brandt Properties LLC
or Current Resident or Current Resident or Current Resident
358 Air Harbor Rd 342 Air Harbor Rd 701 Green Valley Road Ste 300
~sboro, NC 27455-9280 Greensboro, NC 27455-0000 Greensboro, NC 27408-0000
Mr. Willard E Thomas Mr. and Mrs. James Gourley Mr. John William Easton Trust
or Current Resident or Current Resident or Current Resident
1911 Shepherds Way 1911 Trosper Road 22800 S W 156Th Ave
Greensboro, NC 27410-2494 Greensboro, NC 27455-0000 Miami, FL 33170-0000
Leve13 Comunications LLC Mr. Cecil Miles Buchanan Ms. Sara Cooper Yancey
Attn:Property Tax or Current Resident or Current Resident
or Current Resident 1589 Curfman Rd 1812 Trosper Rd
1025 Eldorado Blvd Greensboro, NC 27455-1201 Greensboro, NC 27455-1218
Broomfield, CO 80021-0000
Ms. Patricia Nussbaum Mr. John P Rountree Mr. Patricia Nussbaum
or Current Resident or Current Resident or Current Resident
1720 Trosper Rd 1604 Trosper Rd 1720 Trosper Rd
Greensboro, NC 27455-0000 Greensboro, NC 27455-1214 Greensboro, NC 27455-0000
Mr. James Harry Weisner & Wanda Lynn Mr. Richard G III Etal Smith Mr. Michael R & Eva K Cooke
or Current Resident Trustees For L Richardson Jr or Current Resident
4618 Lawndale Dr Unit A or Current Resident 6043 Lake Brandt Rd
Greensboro, NC 27455-2036 P•O. Box 20124 Greensboro
NC 27455-0000
Greensboro, NC 27420-0124 ,
~
O
Richardson Farms Joint Venture Ms. Helen R Mcneely James Edward III Easley
or Current Resident or Current Resident or Current Resident
C/O George House 5243 N Church St Po Box 39133
Greensboro, NC 27455-8238 Greensboro, NC 27455-1357 Greensboro, NC 27438-0000
Ms. Lacy E Jr Boger Mr. George L Jr & Marlene F Jones Duke Energy Corp
or Current Resident or Current Resident or Current Resident
5335 Church St 5405 Church St PO Box 1007
Greensboro, NC 27455-1358 Greensboro, NC 27455-0000 Charlotte, NC 28242-0000
Guilford Lakes Aviation LLC Mr. Joseph William & Beverly C Scott Mr. John Eric & Donna E Moll
or Current Resident or Current Resident or Current Resident
150 Air Harbor Rd 5906 Stoneleigh P1 6307 Tamannary Dr
Greensboro, NC 27455-0000 Greensboro, NC 27455-0000 Greensboro, NC 27455-9240
Mr. Kenneth E & Wanda K Bell
or Current Resident
5143 N Church St
Greensboro, NC 27455-0000
•

Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
C
APPENDIX B
Agency Scoping Comments
r~
•
P:\Greensboro\Townsend Dam-130603\Permitting\Individual Permit\Individual Permit Support Documentv4.doc

Apa ~~~~
~~. , ~ 7` y 0 ~. 1 0
~ ~..
.,~,w~±a,,.
l~torth. C~'~trolina
Department of ~drninistratian
-liclxael F. Easley, Crovernor Britt Cahb, Secretary
~9s, ~l~:linda King
C'it~- of'C~reenshoro
c/o 13r<:s~vn ~'i C'ald~~e.ll.
2602 S. F~:l_m-1~;ugene `titreet
Circensboro, NC 27~fJ6
l:)ear lti~1s. King:
Re: SCI~I File #~ 07-E-~~t)0-02:0; Scoping, Coy}structi.on of a replacement spillway, eater intake
structure, are{i pump stati~~>n at the City of C~lrecr~sboro's bake Totivnsend 1Jam in C~uiiford County.
The ahe~e-e rc;fererzced en~~irnr~snenCal impact irlfc~rrnatiail has lacc~n rcvietived through the stat4
C;learin~,house Under the provisions of the North Carolina Cne°ir©nmet~tc~.t Policy :pct.
<~ttached to this letter are comnient4 ~t~ade by agencies reviewing this document which identify issues to
be ~~ddressecl in the ~;nviro.n.me7~tal rer,=iew cloc~un~ent. ~1~lae appropriate rloc~~tmer.~t should be 1~orti~~arcieci to
the State Clearinghouse for compliance; with State ~nviron~nental Policy rect. Should you have, any
questions, please cio not hesitate to call nee at 807-225,
Sincerely,
"cif ~.~~ %'~~ ~.`rG~!` ~ :~ C~
~1s. C`hrys I3ag,gett
~r~virr~tun~:ntal 1'ol~icy r'1ct Coordinator
rltt~zc;hmettl:s
C4: ~`.~~lE~il ~I

T'~'„
«.`..r.`..""...'."'
~~~~~~
~vrt~ Carc~~na (~epartrnent c~# Environment and Nature! ~esc~urces
-,~~ r c
~~wF<ae ~~~ey +.~r~~r

V~lI'sc~i"i ~7. R~JSS Ji.; v2t`tF3~c3CV
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•
~: ~Tarth a~ra~~na ~i~dl~e :~.~saurces ~aa~~issian ~=-~
Ri,:har;! ~. Nn~taihott, ~~cectiive D"uecior
l t3: ~e°l~a !~Ic~. En~~runr.:~:rstai C:~rrdi~tor
~~f wea>,i tative snd intergovesntnentai At"ta3rs
FROM; lrar+ L, ~Ty81?,~, P moat itt$ion Ca7c:rdinatat
l~abitst C~~*ttsorvatiost Program
DATE: 3ti Ianuarv 2~tJ~
U~i;IFC T: :Scalarnt; Ccx ?araiCt `Tc+wvnsettd i,~ant, Spillway, Water lntakb, and Ptmsp Statit~rt
Ke~alacement Project, City c~A"Greensboro, Cuilforci bounty, DENR Pro}trct ',*~v. ~_~l'Z~,
£~ioiogist~ with the tith Garc~iitia 4Vitdiio R~;oures~ C+ammssic~n ~G WRG} have rtvie-+al tht
• strbjerc dvc:utntnt and. wt ar+c fenxiiiar +~ ith th4 habitat values of the area. VVe met w'sth tier pro}act's
crs~stsliartts or; 24 3sryc~xy ZU~t7 trs dis`u~s the prvpt~ed project. C.?ar oamrrretxts art pt+cavided in
a~rdan+ct with provxions ofthr Fish and Wi!dtift Coordi;ttation Act (4$ Stat. 4Qt, as smen~cicxt; 16
U.S.C. ~t et seq.j,'~c~r'th Gart~eiitta Envtronsnental Paiiry Act (G.S. l l3A-i tl~argh t i3A-If?; t ivCAC
25}, and %ottitt Cwr~+litsa Generat St~ttutcs {ci.S. 1 la-l3l tt st+q.}.
The tr rty ~f {xreensbaro primes to r~lace tht spiiiwway, water intt•Ice structtme, xtsd pump staiitxl
at Lakt T'ownsetsd. The current concrete farititirs art expariertcittg structural dtter'toratiotf due to aikali
silica reaction. Rehabilitation or re~aair ~~f ti-e axisting structaae is not ft~ible due to the excessive
damagt and the existing spill~v~y ins itusrlv~uate h~tc~auDic rapacity to paves the starts mar~datzad spillway
rlasEgzt Eio~. Thr proj~t includes runs ~'uvti~an cif a now concreto spillway dowrtvtrestnt aaf the existing
dam, rtmoval ~f t3te earistirtg sr iliwati•, earth embankment tie-acts, s repiacemccttt pump station with thn
ssttte pvxztptng cspaety a.4 the txistittg pump station, ar>d a ropiacostsrttt raw water irrtaka strecteu+e in t,lte
reservoir The C:isy prca~see to rraairtain the reservcair st tar sae~r raorss~al pram throcrghutrt constnrction.
Atl intake structures wilt have the apprapriatt maximum intake velocities and exciusicntary srrreening.
t aka "Townsersd iq an impou~~dment cif Retdy Fork Ct+~e in tht gape Fesr River basin. The
t+esotvair sttppctrtc a diverse l`ithcry including sunfish (Le~xsnais spp.}, crappie {iaantuzis spp 1. cat ash
{Ictulurtgr sp,}, 9~r~;e'nAUtit trans {.'t~7crc~ptxrars a~u!-rrardes}, strd E3odie bass or striped isess's}bttids f:4fnror~
sazatitts z M ~ ~rry°sc;cash. Ca+tstrueti~~rt and ~aperat~t of t~to prsrpcsstd prrajt*.ct has tht potrntial to direr;tly
tnpsaCt aquatic and tetrestrai wildlife resources withirx and dowtrstreern ttf the reservoir. Serondarv a~
cutztulative impacts rasuitinl; frtam acir3#it+nsi brrcawtls within t.°st service sass art trot arttici~-atted sinrt the
project ~4~11 sect incre~sc caster treatment capaa'rty,

T'sge 2
29 tanuary 30'7
Scxtping-Lake'fc~wnserd I~aR!
~r,}ect t~Tc+,. Q?-~1?2Q
l~~,trtkCCUCa
T'ne applicii;it proposes to constn:et s ta<~ ~r .; : ~e truct~re cortststtng of foetr, Q.~-iych liit5y ~ ith
a 2-inch (~5 ctn~ seen en the resczwoir end c;f each pipe anti an in#akea velocity of {T.83 fc~ pcx second
fps). A 3/ll-inch ~ l cm) screen would tae instolted at tho pump s:atitxt end of the pipe. l~ar picdrttartt
rexvoirse tfte',*~1~::~,~rlta;. r~:n;r ~~ .'- 1 ~ s:re~:n std ~. £r~s tti zstir~itrtiaa iris tc aquatic resources.
1'Ve are i~rrcerned abcaut fish er~rairunent a~ mor#atity in tht intake :strtscti~re pipes sad pump
s#atiutt with the proposedl target screening and !iigher itttate; velocity, Socause ttte proposed scra;etiing
and intake vc:ioc~ies e:~c+eed our recommendations, we cieetii to tharoughi~r undexs~rsd the intake structure
design and c7peratton tc~ detercreirte dir~cct irrtpacts to aquatic resozu~ces. For ~ to fully evaluate the
proposed de:sigri, lira Envirc>nm.cntal AssesBement (lA} should iticiuda the following:
The reasc~tz(s) a ! ens screen Arid C3.5 fps intake ~relaei'ty is not feasible at the reservoir end pf
~:ach pipe, lz is sear ursderstauadinlg zti is conf gtaratian wtattld incress~e tttatiritenancc, but it is
unclear the degree to which it woulduzcrt^ase rna.intestancex T'Irase describe tfie; tape and
fx'esquency of fnsintezriastce requires! fir a 2-inch and a 3~`8-invh (1 cart} screen on the reservoir
end of thr pipe.
+ It is ctzr urtderstaszdi.ng #c+ lawn the intake velocity, the rtsarvair end of the pipe would need to
be enlarged. T'lease describe the site (e.g., diameter) that the t~+xvoir end of eectt pipe would
need to ~?a h'a ac;hiave a maxisnusm t~,5 fps intalza velocity. If screen sire (l. e., 7-lrch vs. 3I8-
i~h) a#f`ects the pii a diarncter. then {tl+~sa imcludet the pipe diatnettr ttecaded for both screen
• 9i~es.
* i3ased ~ ttie diagttana sulsmtted with the sc~aing documextt, it sppetars ttie four irNake pipes
wotatd be of varwi.ng le~gtba artd depths. Please include: details on fire itstake structure design,
including the ititalca depth fra:«rrt the: water surface, distance from the sbcxalinC (at naartrsl
pool}, atxt ttta propt}zed arperetion for each of the; intakt pipes. 1~`a arc ittte:t'risted i;t +xhc~thex
one pipe ur more than otw pipe vrauld be operating at a time. Also, wa are imtreste;d in the
i:ipa'a depth below thaw 4vatet^ surface and diststttce fratn the shoreline: what tapereting. Pipes
nee: the stiwralirse, act uscci frequently, ctr octet that suddarzly be>c+otna crparatittnal have a
greater eliancc of entraining fish with the proposrxl ?-itzch swatting and fl.8a fps intake
velocity. Distance frrm shoreline:, depth below water' surface, sttd time ref yeas the pipe is
+i~paw~rational also can after the chance of fish etitrainm$ttt.
r~ schematic that sh~aws the profile or stele vtaw of tht prapc~ed water tRlake stnlcS~re pipes IR
relation io site pump st8tican and the contours of the; rese~tvaair bottom. ~a are inicrested in
whrthcr the ;pipes will be irestallcscl c~ri the surface of the rese~voix bottom (angled j or wl~thar
these uvi! 1 be buried in the reservoir b+xtaarrt (straigla} with onl}' a section cxf the intake
sttructurrµ pipe :xpoaed psi the reservoir bottom. P;eas+a includes details fur wet ati~! dry
construction snettiods, saccftrr:rnt arn# erasion control, and an}' pertnarsant changes to rc>etrvnir
ca~t~tours car ag4a#ic habitat {e.$,, rrsrior<sl of tr+ec stumps, aquatic vegvcaticin, car lsg crces~ that
may tuft from irncaiTatitra of the pipes. If treratxs gill be dug to install the pipes, we
rega:est teat natural materials {;a.g„ rocky gravel, and rand} one used to back fist rho trrttch.
Letxi's ctn the 3t8-inch {! cm~ screetringstructure at tl~ pump statir~ and pf tht pipe. It is czar
understanding t;-~.is is prapesed to bet a travalirtg screen, tsleasa lttcludc details un the design
and c~feratican of the traveling screen and whether it is feasible fbr fcsh to surcivt if they come
in coaiact with this screen. Tftha fish can survive coming in contact with tho traveling screen,
p!e<sse describe whether it',~'ciuld bet fessiblc for the pump statia~n to be dasigxted zo rwlease fsh
•
i'`d S?9G't;bi.'9t;s1- quQR~~ t,~rx+:~9 dRb ~~fl LO OE uv~

• ~~1~4 3
~~ iaoauuy;.tlt;7
Scoping - Lxlte't'•~~wssenJ t3am
Atrc~t Ida, Q7-t3m~ti
d~X:~cti~ back t~~ the reseraoitr rr ~.~ nether s", ~ Te41r€ cc~tte~;t~# etXiKi releas~,I to ti~w r~ervcair.
P(est~ datait'tclw r~:;reattl;c;ti c ~:. ~z , .: ~<a t.,~ters ?~i(( (~~ ale-rtexi tc~ tle'~~:tiuts oaf :te uxt;~°
intake Structure.
Trrfa~rm;ttian can §ite~ture ar stuctiE-x ~i$t ~Y~L(t~tC ~tC{~T10Itt rCSC1'V~plt' fi5iit Ct7IF81ClIi3ClTi 1X1 l4StCi
isatake stru+ctt.tres anei tisb mcx'.a.tty in rctatian to tttaake scxeett mesh siz~os and ti~ctacities wauld
facilitate our r~icw of the Arced intalte strucitu-e design (2-ituele scrcect; x.83 cps irstalce
verityl• A(sa, a cazrtl?arisor `at dt+: prxrpcasesd intake strttcxttrrz design with these of earner
pieclrnarti w~atex sttppty t~cscrvair in North +Carctelirsa that are: similar deaigtt stud have been
c~ttstructed r~itltir. ~~ last 1!?-15 ytars arse r~°~id faa~ilitx~ a-u rcrieo~°-
'`~_~11?. ~...~,.w arw+'~SllCcar~et
In Jttnuar}~. 1993, rhea N~ W 1tG ce~ncurred with the is3uastcee of a 1'tttding of rue sigrt6cant impact
fear ttte expansion of the City of Greensbara°s water ts~eatmettt plant ptxtvided a minimum re(glse of 7. (
cutsic fed pex se~;and (cfs) was rc~itutained w#tatt+aw*ec Lake Ta~rnsednd is adt ttiorstual pavi {71?.0lruxll car
ttiglte7'. w hews ~e tsr~,~cair was txtaw sxxtttal ,pool, tt minimum rt:eane of at ealst : cfs ~ to be
t9lAirttSix2i~, '"IuC 2 cis re:I~axe cCktld teas m2~la u'P from averflnox fire tl'e flte~ backwash water lagorrns.
Tkte EA shcsuld incJ~~de the fallowing:
+ Lktai°s regarc~tittg lcacatrxt ref nev~~ spil(walr r;lativ~ to the :xisting spillK~y.
• + iw~timateci str~easxt artd ~4etlasx! impacts and rzteast,stcs to avoid and rninimi.ze im~.;s tc> ttese
€miurat reaaurcea.
s '.41bi1ase•rtattce eaftlue rrquirec? davrrratr~m tnitaitrnsm tTaw during aRer prrtEcx;t canstructicxs.
• ~ surrsmarr of the test taxrce years water lever elesvatians irtclttdirsg ntrmbcr of days at ar above
sxxrltat pawl (717 rrssl} and below rtcarsrsat PaoL.
• (Measures tee Xnirtitniz:: lead-;aectt and erasiatt ttttt'rtb constrt~tiati phase;.
In addition to addressirt~ tba ca:tcerns auttitscd shave, the EA altttttld itxlude a det.3itcd
asscastrte:rst of txisting natural resxsuXt:es witlstt tF.e projeea stet and sbautd disctas3 the gatcntial of
tnitigatimg impacts to wetlands, waters, and high quality upland halritai To facilitate our review of
proposed pmject impacts an aquatic atxi tcn-gstrial wild~fer rtR{~titCel, we regttcst the fallowing
ittfarx~attian lrc ic~iuccd ~ ~e lrA. Please Hatt tlsis gettexal fist fear all scarping decttrn.caxts sad some of the
itsf+~xFnatian, requests sad cattxmcnts shay neat be applicahle to :his pmjtct. tt is de~igyncd to assist in the
pr~iau of an 1~A chat addresses i:npacs to aquaria and tezzsestrial wiidlit$c resaurGes.
i. lncludt deseriptans ofuquuti~ and terrestrial wildlife resauzces within the pmjcct area, and a ii~ing
of federally nr smote designated tttrtiatcrurd, estdange~ed ar special caetcern species. A l~stistg of
desigtL'tted species tar. be found an the ~.~. ;++(utstrat I~ie~itage P'regrsm's websiic a=
2. 5urvesyy 3hciulct 6c can~tcted by bialagists with heath sr3te and fedt~al enciatsgssred spe:Cits pex€rtits.
3. Include 11es'cri~+ti{)rts tat any st~ean~ ar wCtlandS aff'c+cted by the projaGt.
•

. t ~~G ~ ,
~~ Ian~tary ~!C~~?'
Se~ct~ing -take Tt7w~nawnd t3am
~. P:ttsltrde pr~-~;ect maps identifying wetland areas. ldeniificatian crf wetlands mte} be acrt;orrpiished
thrc:ugtt eocmiira~tti~sx7 ~~~ith t:~e t.3.5.:~rmy Crarps of En~,iut+trs (~C~E}. Iftha ~Uf? is n~~t consuhed, ttte
pet^s~n det;r.~tin}~ `.v~'tlands shc~~ld bs i+~e~ified and criteria iistecl.
5. 1?rovidr infortttatic~n ~n existing, pfatutcd, sad pro}etted sewer ar~d water infrastructure sc~ruic-c
thmughtrut the service area. A trsap showing the focatictn of the exisiittg and pr+7jtsctesd lines and areas
containing spcciaf resources hnuld be itx:fuded
6, I3efitte the stn ice arcs fac the ~rct}act, rachuc~ng azty ~"7'Js {actrr~-tcxrit+~riai jtuisdictiat}, arxi provide
a snap ufthe ;sxvice areas. 'ffpa map aced dcscriptic~tt sltouid pravi~a etc 14 digit hydrologic unit c~xiea
~HETC} i:~CEudcrl n the service area.
7. presvide x ci.rip:ic~ of project s~ctivities that will occur within weaiartds, such as i>E1 ~ ch;r.nne;
alieratior,. ~1cr~age ~,f wettatxis itnp.rcte~! f?y afterrtativa project designs shratld be fisted.
~. t'~rovs+~e a alaS+:rr`ptiort and a c€,, er type trap skxtwing acreagt: of upland wiiailife habitat ±rnpected by
the prc~j+~s:t.
~. Discuss t;:e ext~:nt to r~ inch the israjc~:t wif; result in Pass, degradatittrt or fxagtrtertatic>n ai wildlife
habitat ~wrtianQs and 4tpiatndxl.
24, Buss any tnesutures prpp~~s€rci tc> avoid or rc~fttce irnpacLq of tf'te projxt or td trtitigato urrrvotdablc
}sab{tat losses.
! t. Discuss tl'~ cu*nulatvC imparts ofserr~ndary deuefttprnertt facilitated by the proposed project. Such
• dfscussiisn sf~ttxald s~~e:igh the e~rts?trti~: ber~fits <af such gru~vth agsirtst the cxrsts of as;~~:iatrd
c€tyirc~tmentaE degradati~tts.
(a} tt~cftzttc specit'x: rrtr~tsurr Ce.g.. l~rcal sartlitsar} tfrat will be used to addrASS stortnwetes attd
seciimrrrtati+~n at ttte sc~urcc. lnclu~ft 9p4cific t~uit'ettlexttx fs~r bah residential and cvmrn+ercia~t
deti~eft7:ptnents and Heat ~tattagernent Ptactice8 (BMPs} ~ wilt be t~equired.
{bj fttcfucie specific measures {e,g,, iacal <uciinattccx} that witl be used to protect stream corrid+nts,
riparitan halsitat, artd a rt2inirnum of the lAtl-ye~.r fSt+vciplain firorn fllirtg aid develcypm~t.
C''4rrtrtt'stments by the prtmtxt spmnscxs ter protext area streams witt- ri~ian f,uffers tltmu~~r
purchase Lr coats~~s~vatiora ctrfent are of pacticuletr iattcrest.
I2. trtclude s fist G~f ticrcumern preps that shows h indivaduai's prufessicxtal backg~rnd atxl
ytsali~~caticrts.
At efts time, the informat4:t provided is nth suE~eierrt fc>r our staff to make dtsftnitiaFe
eetroztrnezzdatic%res or ct~t~clusiotts centernirag this ~oject. T'ttautk you fix the apppcrrttutity to pr~,uide i:rput
to the early Flaixrstng st:~res for this ~arve+el. If sti~t cart be of xurthcr assistance„ pltast contact our s~t~i~ce at
('3~6~ ~4-"6~5
e~C; Sarah '~~citac:, *i Hf'

-.W...r.r...
N kh r
~~ ~Ilrt~ D~~~rtl~~l'~t ~f Erl~lrrlm~rlt end natural R~s~ur~s
~'}14i{}t~ ~~ L~++~CE:t' Rc'SC~i.I~C~'S
~,:m ~, Rn~S ~, ~e~r~ta°y
Januery ~E~C} t'' .Iv~'f' '"~rf S, ~?"=;'Mft^"
MEMtJRANQUM
TCa: ittlelt~a McGee
,,
l"RC}M: John Sutherlan
~'~
l~BJI~,~T: pity of Grey: Ursa oc~pincJ l~t~cur~sent
Lake Townsend Clas°n and 1rater l're~#rnent F'larst Project
Prsaject Numb~:r t~7-C~2Q
The E3ivision c~f'~'ater Resources {1~V~1Rj provides the following cornmer~ts after revi~:w oaf the scopincJ
;,document for preparatirsn oaf an ersvironmen#al ~sssms~nt {~A~ d0umertt ft~r the pity of
Greenl~orc~'s pr~ps~aed prejet #~ replace dam and °~ater treatment plant appus~tertan~e~ located at
Lake Tsawrsser~d, a tivter s~spply imposxrsds~nen# lecated on Reedy F~arkr a trilautt~ry cif the Naw River.
s~tcatth cif Greenslacsrra.
• 1. .The pity ref Creen~baro sht~uld cc~r~ltnate Frith the ~3ivision~ cif V~tater Resources rid mater
dual"sty ar~d the ltl,G, Xlllildlife Resources ~orr~missir~n to determine the flow requirerr~er§ts tc
main#ain ~cua#ic habitat in reedy ~or#~ dr~xr~nstrearrs t~f the Towrssend loam and the watr:r
#rea#ent plant. Tlae F._A shQ~sld provide e#hads, results, o'onolusions and oorrespondenc~
used tr determine flow requirements, Qocumesata#ion of the e~i~#ing flow requirement fear the
Townsend darn is a#tached to t#'s rnes?aca.
~. 'l"he ~A should present rtiscusiors of r~secl~sanisms ~sncl pmtocols to release, monitor and
dcumerst ar~y c~ras~trearn €lows tha# r'nay be required frc~rr~ the praject.
°i'he flow req~siremer~ts, release r~aeci?~snism, and saaonitc~ring sy#ern determi^ed during
preparati~sn ei` the ,*zi will be provided to the l~ivisi~trt of l..and Resdurces° Qam safety Pre~gram
for inclusion irs the dam safs~ty permit for the s#s`~tt~ture.
Thank you fc~r the cappcattunity tit ccarnment. If yc~u have additional questions or ccsrrsrrsents, please
ce~ntact Fred Tar°~ter at g 1/"l ~ 5-4~2 or at frect,#<arvv~~ ~ ~ t*,r7~aai1 ne~#.
~~ttachrnent
cc: mood y Yc~nts, Fred Tarver, ~~`~FR
Shari l~ryen#, V~fRC
Der a Ksar:l~en, Ql~l~i

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C~~par-~rnE~rt~ c:~f rtverc,t~rx?c:c, ~~~~~~: ~~~cf ~tctr°~! ~~c~t.~rcc:ti
t.. JiY1~k:an t3~ -.". ~'z'F ."~s.: +(?EfTY,:.'L:S
~1? `~3r~rth `9aiisbury Screw ~ ~' ,'~>_ :'~c~r-,E~ t;.<~sr~Ena 2~~st?
,lames C;, l~tartin, t;,c~vern~~r
~~/illiam W. Obey, Jr., Se~:.retary
~e~tember i7, 199?
ty9EMt~FZAI3 i~'~-~*i
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~'~t~M= ~'~n :'~tlttzt~t'l~~nclr
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f~~ ._. .._a~"?C,p Z; E~~'> ~. ~~e"'C.~y'l,.e"ip~{~'.['~ ~w~~:Y 'jL., /~~l ~1 "~'~~ .:~~" .. j_~. .. Ayw.`sq'i'I~l~~i~#4.. 'f .5 ~i ,.+ty t;Yr T
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~. 3:~tkrvf~ ~rl`;. ~~..~.: '.^! ''}(~i~?? ,.. 3.?<`.:?? L7~ f:r`?~.' ~I;1 E~~ ~.:t,»~t R:.~,r~s. ~.~ c: >:..,,,:i~ ~<"~
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c.c: .7ess1Ca Mips
Steve Reed

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iv`ith.tc.. i.F, €Y ,,, 1r.. 5 ~rc~7:
j~''~ ~~, ti,•;th ~:u~?sssa ~~astrtrcrN c,t "n~rrrrif •ar aro-:f V~tfirat ?2csc•ur.'.
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I~7tpartznenc of Erzvirt?nazlent r9rzct tiarur.~l R~atJUrcc~t
FR.(~h°1: ~~~z~€za~t `~ta~tirt- ~ ~
t~i~ri~ii~za r~#° ... ;_; t~u~slity,y~ `'
~11~1~C"'S'. ~tailfard Caurtty
~'ity of Grterib~aro's Lake Tt~~~c~4end [~atzl
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~k~ ~, ` 2: Sil,~. ;~+1~1, 3~~:~'C><rL~~~aa. ;.t ' ?`~t ~ . ,.11 ~`;al, _ `~ > > ~ ,,s. ~%~::i~?I~£~ t~3et 1~IR; '~'TI~~T1C
cammunity wrti aci~~e.r~ely iri~pacitci by tc~w c~i5sc~tvec~ ~axygen retet~ses t'rc~rrz La~~: A'rtt~ ~i~.,~rtcl.
duff during rirought eont3itians. Reedy Park (.=~t.,~~ I5-11-(9_-<i_') i~ cR~rrentl~' an the 3C~~(~i}
fiat fc,r imp:~iml bialr~ ,..~I :r~,_ i° t_~ ,.) , :r.~t. ~~'e~I.SC ~~:e tae .at~s~x~:~ ~uhE~asin map.
~. r`1c~c~rdng to t~z~: t}~aa~~.. r >;`,! " ~` ,~ ~".:r~ ... ,~~ ,'~. ~,,:•r~c~ ~~fcft~°r• ~Irralih~ !<trz, :~~ ,!
t?wfl~t;i2~~ !r! Cs'rc't~rz~#}~ C,.: iz:ma ,1 si',,! r.aaaiTl k4 54' e il..i ; .cvY (t~ ~. ~ t:~~:kt ~t,tE~ '' ''i '.,~,
~tipulat.ian t'~r e~p:~c~sit7n ar'the water txr~vtizz~rzt ptatzt ~tti>rri `_'~? tt~ 3f} ~'IGD."
fhttyllh3t~enr~,~atc n~: u~~~~in~,°itie~clc~;tarn~tztel~hF~ntr~~'~~vaterre~ ttrc°.4~ tl!?t,,~,t°~
', Please eantact Frei Tarti~er with the ~Jiuisivn at ti'~rater Re~tiurce~ at {+~1~-i ?~ j-~~3~ ~~C Ott
freci.tarver~? rrua~til.neE.

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°+c:~r~~ents i(;.t i.g~-ta! ~xr;ci tti mill r~:€ttain vntite ~O:t(d) listvf I#npaired waters. ~e~traent It~-
11-t~-I a2 may tie retnoc~rci letam t.h~e list, alth<.sugtr any restUr~dc~n ct~ortsvrT~lt}t_.s #'ur strcagon
t~~ the hiul~~~ical cvrf~murtity tviil tax~et the entire ~+atershed. ['his segment ~°ili rerrkain can the
3Qs~d) list fc~r the rcereatic~n impairment. T~1D~s (Chapter 3~) ~~ill be devett~ped ~'vr identified
stressvrs within if- t 3 ti ~<trs ref listing.
i~'`C11~',~,,(~tPft{~Xj~" ~t~117{7ttt'~'S
~l"he ('ity ofCrernsburo is ~rursuin funr~is7 tc) rehrtbilitate the vastrv~ater callecticsrt :;}stem #c~
;~°,?t~~.r >;~tiltrati~:~r~ ~r~ ~~~fit;~r~~ ~;.~~~r -~~ _., ;.
2.3,E l~eed;-• Cree4c (~.v~ i~-1ti-{1)a urid bj
C.°ur°°rc~rtt .~textu.c
~.~C'(~V' ~rL`e~ti. tiVaS t"~Silt <;- z'~~~t'fire , ,~ ;'~s. ~ - ,. ~ ..t7 '~. i~ ~C?tf t, ;-'~. _ .1'Y'*:2i-! ~;?>.n<ti `~~ , : 6;' ~ `;:,
Reetty Creek [ltd-t'»#,k f~' ,, ~ :t~ ~' 'i ~. , r ~f .r'~"~i73 'r~~ ~c? ~C~ ~ ~. r- i .. :l'1 t.
lrnpaireci fir atluatic.1,:~ ~~.~~., ,.~ ~' ~ r.~sr fish t ~ t_=,;t ,-_ ~-.~i ~. =t Site ~F~~. _i s..:~t
deszc~ada[ivn ryas nc~tec~ b~; er~adin~ screambanks s ;t ;,..,;~ i~, . i~ ar3ci rifles.
?~~(__ ,?,,~~ ~ srrnt rsct rau c
L1WQ wilf continue tct mvnitctr this se~rrtent ;~f Rr:edy t reek to identify stressor #ct the ash
cc~nttnunity, -this portion cat the vvatersheJ could e~:perience ~trow~th in the next fe~ti tiears, Every.
etxc~rt ~+haulc3 tie rnada t<~ minimirc impacts tt~ R~:edy (:`rc*.ek. Further recc~mmenciatic~n to protect
streams in urbanizing, areas and tit restore streat7#s in cxitin~ urban areas are ~liscu~sed in
C'}~apter 3I.
A~.~iS .. if `y '3C 6 t
s# ~ j ~ f ~ § asst y',yk~ Irtypy~~a~rysyt'ec$ ~j~. ayyYcrpsry~ `r ~~il~
j ~ er ^ f S ,-S ~e ~'. t4 d.4.A S .; ~`it :.-t.,, .. ~ ~ ..7 1~ ~'§~! S N NdArs of 14~tiXl~r
2.3.6 Re,~dy; Form {Hays '~iil1 Pond) (.~Q# 16-i 1-{9~a1, a2, sx3 and b]
The 2f?(y4 basin plan reramr ,r... rl~s~# £~'~" ~t$rr#: _,.~.r ~reerf,~~~,rc~ •~, rerisce Sz~s~pac.ts cry ltcedy
~{;)3'~. K',.~: f i ,-.; ~' ` -i t- '~ ~ :tla9!!yv' Supp~): ,.~ :~ t£ ~';i}~ i .'ss7.
~'trrrr?Pt1 ~'t~atrr_s
Reed}~ t~crrk ~16~1 ! _,`~'`~i~ ts°~°s~rt ?.:,fie ttgi~nsrncl loam t ~,~~ ~~ ~ ~'~~ lt',,7 brtilts~ is suppc~rtinu
recrcativn because n,~ criteria ~~ar~; excvL-ded at site. E3A?57, ~tth~augh Autumn l t~res#
Manufactured N~ sus: 4 :'~;~ , F d~'~',~~ 1 f ?:.} ~ .~;nificant vic~9atir~ns t~f fecal euiifc~rrn ba~aeria gem7it
iitttits during tha l~ . ,~~.~> ..~ ~_ ,_,. , ~ ~~ , -;srnent pe°~;:; 1, , t~t~:i}ity` had ~ ~ ,,..~r,~ .~f bacteria
ir~Yf ~€ ~~N ~. - ~:l~ ~r~ '" ,C..~~.' i, w°" <1 atil .{~ ~ ~.~ . ~~'~~ ~',t ~Itt'
i aL_wiil .~aa . f ~~. ~f"1FZ1it
d3Yq_ .
Rcecly Fork [I^~.11-~~1ja2~ t'rcam the C'T at SR ?'82 to 5R X77$ (2.2 mites) i Irttpaired icrr aquatic

;, -;
~i~, t~ .. ~ , ,~ - ~5'~:o?r_ a-:, ;~ ~ Est ~r~~i~~~; ,III, ~F`#e s~:~~'Is ire ~, ,<' ~ ~ ~~~~°eixa?
~?rder ctf e<<nsent ~ SC~Cx `~~l0 ~)j that ::K~ir~:<, iit .tune ?{3t7s. i'he ccliCKals are exper:ted tct be
c~?nneeted ~ ~ `.. e ;~, .'~"„ ..:7~ti. ,'. ~6~,>1!; _w, ., .<<~7i + ~. :~:.~ si4~hari~ng by A~4arch ?~C~3.
`7~~,ttldnt ~ 4 .. t. _' ~*~t,T't; rw ?tlti ,.. '''; t ,._ _~ t ":sC'rT$ ~~'ti;t't." e;~Ceeded iii SEtf: ~r1~$.
i ;~ t' - ~ ~ `~ #?F !? :-:it) .~:~ '':i;X iiC a':It3, i~2°e'~1' ?,~.~t zTt9IL',~~ ]~ IdT1~~3;€I: at` f4`t
recr;ativn because the fecal colif~~rsn bacteria 5:anc~ard cc as vic,l;ttecl :;It site I'3:~w ~. t'A.; ~ . ;~Y~:~nt
i~~~u~~ctrtistg a~~uatic Life t~c~tuse n<< crit~;ria ~~'ari e:~ceedcd at ~€t~ f~.~~>~.
~?~t~carrtmcrrel'tfu;;,;,
U1~`Q c4~il! cr~ntinu~ ~~ rn<tnit~r th ~ se+~~rnent F~f Fte+edv Ftark t~ identify srtres~rs tca the fish
. .
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~ , . It , . ,. , k ,,,~ s~r~,i .,, ~: .=;r <°~C'~nc:~ 5:1'~4Vth Irl t~l~ ~~~ ~" i~~.. t•~tirS° ~.k"~.t'~i'
a;.'a; ~ +..a ~,: t~,.?~fi.` iii i`sis!!il'Zdtt`. ,ditps"tItLS (el `:'~ ;~~5' 47r1C. t~I~VI/ CC~t1d1tCt7n3'~ii `~I ~4`.
rttaintairted betnvr lake ~[~~wns€nd t~ n3inrntire adverse impacts t~ the doc~nsireasn t~:nthic
community (Chapter >?). Dti~'Q reccamn~er.s ; :- ,`'x~; to =.,~ ,gip'<;~~:~-ltcht~ra {:tp~:ri:{ix ~'°s
csantinue to rn~nit;~r water qu~alit~ at sites ~n '.~ ~~°° F"arlt. "ft°±e `3 i'C71:~i ;;ur°npliastce tarcgce~s c4 ill
be used t.~ addrt s the ~ignfieaiit pernit c ic>Iatic~ns n~:?ted °~#F~~>~e. ~urt~~:r cerc~snme;s+,#~tic~ris t~
~';°, '~°. t `, ._ @?"i tiF~°~t2td161~; >st'€„ia't 2t:?Jti~, tC1 ta'.titC3X~: ~t1`a`II'ti~ 7.13 ~°Xt~t1£'ii~ s:rl3iln ~it'4"s'k'~ E"SY°L' ti~,?atii3~`~4~ tR
~'~° ~i?tL'r ` 1.
• ~ ~ °,
~egmenis Ifr~-ti-~, ",-~~ ,c. ; ` a~ldcd tc €he a~„z3{~#, ;: , ~ I;. ~-~,t..w r~t'_.s ~ra~~ l=~i-t 1-{`~~R~~~i~4
remain ran t3xey list because of tvftes~recrceatis~}n iin~airme.~t ~ .: ~;~._ ..~.~ ~'"~~~<=r ~S ~ t~t~;=;»;l~
-~~ 1 (}r. ~~t_ j ~; ~83~ t3 ~,-Y ll~f ~~F~~~~ ma ,. S- it y' , g ~^
s.. - k r .-.~. .A:~~i `ir 'ti i,3'",~. ',bpi, .i?'~~ 4 ~r`4; s'$C3f #~rr
I t's~ ? ,

Nr~ 6'~/N
i7y`~n Creek~cas "~ ..:' :Z f?, . ..s:~;~ # ti:3 ~II~Ib'':'.?_, e, ~,..~,5 tIn {»I'e~~ Y~'t t-#-?-1~ ItttC~t
source t© Svuth #3uffato ~;-reek ~~.^ miles) is currently Irn~ired fdr aquatic life because t3te
turbiditti' standard w'as .°i ~ f ~°sc-~~ ut sit:: i~.'.?S~ in i 4 petxsent of sarllfat>rs. Ryan t"reek is ~Ii~t Rat~if
fc~rrccreatian because f~~isl ~~~!:t;~rsn ~,:~€:teria screening criteria c~ere e;~.ceeE~cd at ste 1~ 0754_
?ftt)S_ R~evtr;nt$7?t~ittrvrss
DWE~ recatnmends that ~ ~ ~ ":,- ~} ~P°ee;~~btYr~3 ~:~?pesadix'~°) ~t~rttinRse tta rtt}nit;~r s~~ter yuiaisty
°~ x~ ; ~~, s., ° ~-~ ~._t~ x;'~~rx; ~ _~~~ ~ ar,t tv p1~1t~. D~Q r~~ill tietrt°mi~ne if itttersive sarnplirtg is °
- . ~ ~~._ . sTc.~: ~~~; ~:~.#°:'~acterizt standard in t3~is creep {"~~p~ndix ~j. Furt~ttier
- , . , + , , ~ .°, t .,,~.: ~„°..~ i;F u~'asmizing areas and t~, resi+~rz str+earns in existing urban
Ryan Gret;k v~itt Ise added to ikte ~!~3~d'} tilt of Impaired craters t^ecause of the tuxbdity
vicaIatipszs. TIe~T?[.s (Chspter ~>>} will ~ uet'eltrped tar identified stressors ccithn g-I~~ years cf
listint¢,

Mate oi'~'orth Carolina
1?ep:arCrnetxt of ~arl~.iror~mcni and 'Ya;turat lticsotrri~s Bc r ==n~c;i ~<-;
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iTrn.;~ X14- ~c)7-5454.

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M~ 4:z=:!r WEiV'{ Ct}dttt`VI (ttYn wSF) rt r°~Y'i~d i ~7n1i (:r m:)+rG atrc5 C~ kfe d.aP.ayct. ate ~~ d M-'7th a~;TIC' R ~+iOrtl) ~_>;1YCC {(..1'iSF t~t,,;+~:ty
~CM.aRbM 1.t !G3YC 30 da':t iR`('prs :rg:nn;,:~9ct94'12V.:ACCC yt$J~Fortiti;S)~Grc and 32~,Cffl:oi csC,tu~~Ci!:!Y!ai 'LCtB Or F13£C tRt:3f
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C?r•c€tG in•,;~GCriG:s ixstat 4;ayty sa'ed f>Irv arth F_h:R AGM amuunr varSry
flu;::rg ;'c, r it ~ >`'eth t~prhmsne and nu:nk~u' df sut~r of xt?"resa~±~ Irnd. Any arc r>kioc~( ~Gat~x
Ssn une acro most be rcrtntslGd. '[fic appacac?are bc~d nuzt 3>e rrccitrod
_....~. ~ t<et'cx'e LiG pcmit s:>'n bs issued.
.. ' \o*t's 1';c.;:nd~a Rumi::a Fe; rr+, r` ~n-~iG in!:F+c~ctitln ~y `;'.4. ;7ktifirsn FtzS~7: ~eN7grl`~es if pGtthi: anGGGdi '# is;~s
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: ~..tEes : <cs~as.x61V L, w-i-h G,rgartic ac+dPt # iat matey a,'~~VCr~d r?Gannk activitzcs ass ir•rolv~t3. dnspecctaea xtra~k+ ~y
• »,.....~~ ~:..{.e~iar: a; Iezsraca;3sys beftxe actata! "ut+2 ix p'snned.'
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.: ~sif} ~ r.,tnrt:un zt aG+:.actjrq eo E`r,2 attp;r.r~:~ p,att3 .'.tay a[w tagstire
6~ '< t;a~tr rwsq;>tt~ calt,ot pc!~2ra.-t. ,trk a ~:~ ;Y^rts httta c;ar}+S cst
^' r.,znsera ht turf-ea:tiort tCscze rt nGCSasar~ ~ ~rscar }iazard l`lass;'i,atias! A
c°r:- ^t ^: fce c'S2€~ r?^ mug >^c+7r.^ ~z~ tke appaica ±r:a •tr> a'j~ti~n~t
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R:~GIU4.r~L glFFTCES
t2uestians regardiiz g these permits should be addressed fa the Regional Offzce rt~arked below.
xlshe~~itie Regional C1ft3ce :~ ~i~atsr~s~°ait~ i~i~,i~;xz~t f:~~irG t:~ 1'~lln;sirsgtau Regional tliTlee
2(330 t35 Highway 7~1 ~;~ fast t° t~t~T:° .! ae, :~ .:e ')1 1~7 C"~rtlirat k~rive ~:~'~~sctn
S~vattnarzaa, NC 2~?7~ ~f=.~csrrsvtlle, ;::' q~i S ~'Viir:~;trrtt, fit; ~'~+~

"~. Fayetteviite Regiartal +C7ffice !::J Raleigh licl;fanal Uf3ice 1T~'ins~ton-Salem Regional OCtice
2?5 Nartlt Green Street, Suite '`? ~ :~~00 Barrett Tlr~°t, Suite lot 85 ~t'nu~htow~n Strccz
1~ayettew~ille, "+IC 283(31 _~t~~3 Raleigh, ~C 27609 'Viri*tstan-Salem. ;~C' 27l t)7
{91U~ X33-;~3t30 ~~19~ ~9I-+~Z~Q (33~~) i"1-5tit~il
~! tiYashngtost Regions! C)fiice
t1~3 '~t,°a5hiz3~ an ~iluartr M311
t4`ashington, ~'C: 21x89
t`24.~.j 94b•6~R

CAROLINA STATE CLEARINGHOUSE ~-
DEPARTMENT OF ADMINISTRATION ~~'~ °~' /~~'u~~t~
INTERGOVERNMENTAL REVIEW
STATE NUMBER;O?-E-4300-0220 fi09
DATE RECEIVED: 12/19/2006
AGENCY RESPONSE: 01/.31/200? •~
REVIEW CLOSED: 02j05J2007 ,,~
MS CARktlic ATKINSON ~~
CLHARIt~GHfRlSE C44AD ~;~
[DEPT pF TRAN9PO~YTATION ~
STXTENI D>r PLANNING - MSC M 15 5 9 ~ ~,~i l
RALEIGH NC ~
~-
REVIE~i DISTRIBUTION ~~-'~'~ ~~';'~ ~~ ~1~~'~
CCiP3 - DL!!, NFIP ~'~`` ~ w, ~, ~
U1~i~tlt LFdaISLATI~TE lilFFAIFIS - ~'~
D>~PT OP AGRICULTURE ~'
CREPT Off' CU3. RESOfiJRCES ~ _ r ~~ ' ,
DT~PT OF TRAN~Pt3RTATIOt1 ~';~ ~~ e
~,,~Y~ - .~~y
PIEt~lONT TRZAD CtKa
i?R4J~CT INFORMATION n
APPLICANT: City of GzeensC~oro _
PEs L~t~ ,~xix' tal C?oi : c"2y. .t; `.
"~;~~~a C t;~•.~ti o! s ~>P~.a, ;:~ - zrrake structure, anc: r-,
art t City cif !~~te~:~~~ ~ '. xke= ~~, ..z ,... Gu~_~.for.ri C<_;unty. ,
~~~'.~ r~ja~~C C*:s n: `:itl:"L".:Ltt::'.'~',cI t:;<:; ~.E. Vii. .. ;" 3-:.E:' .`'.E„-lf`.i_ ~.:~`1:3?.l>w +,~!:;.r
~i~lit ~' al rsrlq~et. P1~a .•.~ : ~~~~ i e;~ ;~rR~~ ~ .~k;:~ .!.: r ~, ~ f:,<: ~ c r ... t>y :ta = <ti~r.;v~
i~.~Yx 3c{ ~'~ t!$ ~'~ ~.~. :.~@.' (c~Tltc;`:r ~.:iC',1~~~1 ~ , (, 'a. ~(!'~ .
J~ Y..L:~~ '~._ A. ~~'R~~"~ ~. .~. E ~ •: ':, T') E c3 :a<c? ., r, fv.a . _ "_.al .~ ~.i ~~2 t ..E, c. , , ~ i ' <n 1 t5' ~.~ 1 ', J .

~1 ~`t 1'tllx ICS I`fi~ }~'f:; ~ tv ^ ~q i`3 >~1€ C~'~ 4:: L`:
NO CCU!€NT
.~ A`I"'S`ACf~ E D

•
~ ~~~
~.
~.~~~~.
STATE C?F NORTH CAKOLC~7A
DCPARTMCNT ~3F TRANSFORTA.`I'IQN
l~t[C(IAEL E. EASL,EY
C iqY I?H N(]Et
l.Ytioo ~[~IPPfiTT
JE:('H( fA1tY
Jarruxtry, '~~ 2~t}7
,~.,
Ta: Cluris f3a ' <:~ J S I ~~ .,,~ .. ,'1
ggett r
Charing House Director _ ' `.,~ ~.,,
< ~~ 3. '/
E'rorn: Michael Abuya, EIT ~ ~~' ` ,~~~' . ; `~ ; ',~
. ~ ~ ~,
Trarrsportation. Engineer `~`._ ~' `~' ~'"~
"1'ran~portation Planning Branch ~~
Srzbjc;ct: Review oE'{)7-E-43{)t)-220
N.C. State Clearinghorrse Review of'Spillway, Water Intake, ~~nd I'r~n~p
Station Iieplaccment Project on Labe Townsend ~Dani in Crre~:nshora, NC'
The larol~osed laro•ject is located less than half a rltile ~crrrthtvest c~fSE22630 I?oggett Koacl, which
is a mirror thoroughfare: in the ZCl~4 Greensboro Urban urea "Chvroughfare Alan.
1lttachmcnt

d ~A ~~ h
+§'•r~ ,
~4
,"t py~y...~Y~
1`~(ort~ C~arollna
Department ~f ~~~ministr~tion
Michael F. 14;asley, Cxovc;rnt~r
E3ritt Cobb, Secretary
Febru4~rti~ ! i, 2t}t17
its. Melinda Iti.inl;
City of Greensboro
cIo f:3roavn c~c Caldw-ell
2602 S, Efrzz-l?ugene Street
Greensboro, I'~IC 274()6
[:)ear N1s. King;
Re. SCH ~"ile ~# 07-E-4w~(}0-Q22~, Scoping; Construc~tiorz ofa replacement spilh~-ay, water intake
structure, and pump station at the City of Cxrecnsboro's Lake Tn~-nsz:nd I~am in Guilfrard C'aunty.
7'he ~iaove referenced en~tironmental impact information has been revie~~~ed through the State
Clearinghouse under the pro~.isians of the~orth Carolina F;z~~~irorznzental Policy ~~ct.
AttL~ched to this letter are; additiz-nal comments mtade by agencies rc~~iewing this d~~cument whit;h
identifiers issues to be addre5secl iz~ the environmental re~~iew dacurnent. "I~he appropriate document
Should l?e tcarwarded to the. State Clearinghouse for compliance a ith State ~nvironnzental Policy r~,ct.
Should you have any questions, please do not he itatc. to call me at'~07-2425.
`sincerely,
r~ttachznents
cc: I~el;ion Ci
~~5. c~llrys ~~ag~ett
Environzn~.rztal Policy Act Coordinator

w,.......,..
N~r~h ~r~lina C~~~a~rt~nt cif ~r~~irt~r~r~ent r~~! Natu~~4 Re~~t~rC~s
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5lrearn t1~~v~~ 13liiSf be maintained t~ar~~t~l~©ut al# pF~~ses ~f"tl~c ~rcajc•r~ ~~~iai~ii:r~~
rtsialta[icyn of the Est- i~~~ivncci <~i~c~>c~rs.
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512 `; ~~-~ Sa~iS'4tit s :?L R.:~h, t~~~h +;:~tCltn3 "'~r:~
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T~~t-~~t~ ~r mt~ ~f tiephorte r-~br (~t9~ 7:33-~57~ s#~~?+~tii yaa~ hwc any c~uesf~c~tts ec~~~~:errsing
fhi~ matter. ~°U ,rk t~rwar~i ti~ r~lc;si~~ir~~ finz3.t deign ~tt~%tit"k1~n"s tzr ti~ciu.
z~incercly, ~. °~
,, ~"~,~
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James T~. Simcan~ E'~, I'
~.~icectar and Sfate f.'fcrtc~~;ist
J tJ~''t~41t:~';'1~'1
~:c: t4is. hrtelinda King, PF, City rsf Greens~soro Watc;r Rcsourrc:s
I~tx, ~1l~tshat! ~I"aylcsr, PE, t"irc~~.~~n end fr;at~itiv~clt
Mz. Robe:rt C'~nr~c~n C'G, Schnib`l ~nc;inerrin~
!4F~Tr..Iirzk i~~1cRi}~ht, t:~H-f'uE~tic tkFat~r 5~~p1}~
twits. H'~nraah''st;~litng:~ 3~~'(:~
~1r.:~teve ~Tecidcr, DV~'C~ Re~~ict~ai c~~~ra„~~r
Ntr. John Sutherlar;~~, C~~t'R
its. C`hry~ ~3aett, I~7.f;..~stati; C'te:~rin~;hnuse

Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document

APPENDIX C
Wetland Delineation Data Sheets
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_-
_'
P:\Greensboro\Townsend Dam-130603\Permitting\Individual Permit\Individual Permit Support Documentv4.doc

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•

DATA FORM 0 ~ t7 4 1 0
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Determination Manual)
GA forested wetland
Project /Site: Lake Townsend Dam Repair, Greensboro Date: 25 Aug 2006
Applicant /Owner: City og Greensboro Utilities County: Guilford
Investigator: Gerald Pottem, Jessi O'Neal, R.J.Goldstein Assoc. State: NC

Do normal circumstances exist on the site? Yes X No Community ID: forest
Is the site significantly disturbed (Atypical situation)? Yes No X Transect ID: GA 1-50,
Is the area a potential problem area? Yes No X GA 100-153
(explain on reverse if needed) Plot ID:
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
1. Pinus taeda tree FAC 9. Arundinaria gigantea herb FACW
2.___ Quercus phellos tree FACW- 10. Lonicera japonica vine FAC-
3. Liquidambar styraciflua tree FAC+ 11. Carex crinita herb FACW+
4. Betula nigra tree FACW 12. Juncus effusus herb FACW+
5. Ulmus americans tree FACW 13.
6. Acer rubrum tree FAC 14.
7. Liriodendron tulipifera tree FAC 15.
8. Smilax rotundifolia vine FAC 16.
Percent of Dominant Species that are OBL, FACW, or FAC excluding FAC-). 92
Remarks: Alluvial forest along Reedy Fork Cr and UT grades downslope into beaver marsh, grades upslope into
dry-mesic pine/oak /mixed hardwood forest and mowed lands. Also mowed scrub in wetlands and uplands beneath
powerline.
HYDROLOGY
Recorded Data (Describe In Remarks): Wetland Hydrology Indicators
Stream, Lake, or Tide Gauge
Aerial Photographs Primary Indicators:
Other Inundated
x Saturated in Upper 12"
_ No Recorded Data Available _ Water Marks
x Drift Lines
Field Observations: X Sediment Deposits
x Drainage Patterns in Wetlands
Depth of Surface Water: (in.) Secondary Indicators:

Depth to Free Water in Pit: 6 - 12 (in.) x Oxidized Roots Channels in Upper 12"
x Water-Stained Leaves

Local Soil Survey Data
Depth to Saturated Soil: 0 - 8 (in.) FAC-Neutral Test
Other (Explain in Remarks)
Remarks: hydrology influenced by multiple, large beaver dams along unnamed trib north of Reedy Fork Creek

•
•
SOILS
GA forested wetland
Map Unit Name
(Series and Phase): Chewacla sandy loam Drainage Class: somewhat Doorlv
Taxonomy (Subgroup): Ch = fluvaquentic dystrochrepts Confirm Mapped Type? Yes_ No
Profile Description:
Depth Matrix Colors Mottle Colors Mottle Texture, Concretions,
(inches) Horizon (Munsell Moist) (Munsell Moist) Abundance/Contrast Structure, etc.
12 B 2.SY 4/2 10YR 5/6 common/ distinct
Hydric Soil Indicators:
Histosol Concretions
Histic Epipedon High Organic Content in Surface Layer in Sandy Soils
Sulfidic Odor Organic Streaking in Sandy Soils
Aquic Moisture Regime Listed On Local Hydric Soils List
Reducing Conditions Listed on National Hydric Soils List
X Gleyed or Low-Chroma Colors Other (Explain in Remarks)
Remarks: soils influenced by multiple, large beaver dams along unnamed trib north of Reedy Fork Cr
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes X No Is the Sampling Point
Wetland Hydrology Present? Yes X No Within a Wetland? Yes X No
Hydric Soils Present? Yes X No
Remarks: The area east of wetland boundary line GA 1-50 and north of GA 100-153 north of Reedy Fork
Creek is classified as a wetland based upon the criteria set forth in the 1987 Army Corps of Engineers Wetlands
Delineation Manual.
•

DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Determination Manual)
r~
~~
•
•
GA marsh wetland
Project /Site: Lake Townsend Dam Repair, Greensboro Date: 25 Aug 2006
Applicant /Owner: City of Greensboro Utilities County: Guilford
Investigator: Gerald Pottem, Jessi O'Neal, R.J.Goldstein Assoc. State: NC

Do normal circumstances exist on the site? Yes X No Community ID: marsh
Is the site significantly disturbed (Atypical situation)? Yes No X Transect: GA 1-50,
Is the area a potential problem area? Yes No X GA 100-153
(explain on reverse if needed) Plot ID:
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
1. Typha latifolia herb obl 9. Cephalanthus occidentalis shrub obl
2. Poly og num punctatum herb facw+ 10. Fraxinus pennsylvanica shrub facw
3. Scirpus cyperinus herb obl 11. Platanus occidentalis shrub facw-
4. Alnus serrulata shrub facw+ 12.
5. Murdannia keisak herb obl 13.
6. Juncus effusus herb facw+ 14.
7. M~~h Ili spicatum herb obl 15.
8. Ilex verticillata shrub facw 16.
Percent of Dominant Species that are OBL, FACW, or FAC excluding FAC-). 100
Remarks: Beaver marsh wetland occurs as large areas and smaller pockets within the forested wetland east of
GA 1-50 anhd north of GA 100 -153 north of Reedy Fork Cr. Mowed wetlands beneath the N-S powerline are
similar.
HYDROLOGY
X Recorded Data (Describe In Remarks): Wetland Hydrology Indicators
_ Stream, Lake, or Tide Gauge
X Aerial Photographs Primary Indicators:
Other x Inundated
X Saturated in Upper 12"
_ No Recorded Data Available Water Marks
X Drift Lines
Field Observations: Sediment Deposits
Drainage Patterns in Wetlands
Depth of Surface Water: 0 - 18 (in.) Secondary Indicators:

Depth to Free Water in Pit: 0 (in.) x Oxidized Roots Channels in Upper 12"
x Water-Stained Leaves
Local Soil Survey Data
Depth to Saturated Soil: 0 (in.) FAC-Neutral Test
Other (Explain in Remarks)
Remarks: Guilford County GIS Dept. aerial photography shows flooded marsh areas. Multiple large beaver
dams strongly influenece hydrology.

L_J
•
SOILS
GA marsh wetland
Map Unit Name
(Series and Phase): Chewacla sandy loam Drainage Class: somewhat poorlX
Taxonomy (Subgroup): Ch = fluvaquentic dystrochrepts Confirm Mapped Type? Yes No
Profile Description:
Depth Matrix Colors Mottle Colors Mottle Texture, Concretions,
inches Horizon (Munsell Moist) (Munsell Moistl Abundance/Contrast Structure, etc.
6 A-B lOYR 4/1 7.SYR 5/4 common/distinct
Hydric Soil Indicators:
Histosol Concretions
Histic Epipedon High Organic Content in Surtace Layer in Sandy Soils
x Sulfidic Odor Organic Streaking in Sandy Soils
Aquic Moisture Regime Listed On Local Hydric Soils List
Reducing Conditions Listed on National Hydric Soils List
X Gleyed or Low-Chroma Colors Other (Explain in Remarks)
Remarks: Chewacla soils have been further reduced due to long-term ponding by beaver dams.
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes X No Is the Sampling Point
Wetland Hydrology Present? Yes X No Within a Wetland? Yes X No
Hydric Soils Present? Yes X No
Remarks: The marsh areas within the forested wetlands east of GA 1-50 anhd north of GA 100-153, north of
Reedy Fork Cr are classified as wetlands based upon the criteria set forth in the 1987 Army Corps of Engineers
Wetlands Delineation Manual.
r 1
~J

DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Determination Manual)
•
r~
U
L~
JB & JC forested wetlands
Project /Site: Lake Townsend Dam Repair, Greensboro Date: 13 Sep 2006
Applicant /Owner: City of Greensboro Utilities County: Guilford
Investigator: Jessi O'Neal, Sean Doi, R.J.Goldstein & Assoc. State: NC
Do normal circumstances exist on the site? Yes X No Community ID: forest
Is the site significantly disturbed (Atypical situation)? Yes No X Transect ID: JB 1-4,
Is the area a potential problem area? Yes No X JC 1-19
(explain on reverse if needed) Plot ID:
VEGETATION
Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator
1. Liquidambar styraciflua tree fac+ 9. Arundinaria gigantea herb facw
2. Fraxinus pennsylvanica tree facw 10. Lonicera~aponica herb fac-
3. Liriodendron tulipifera tree fac 11. Carex crinita herb facw+
4. Ouercus michauxii tree facw- 12. Smilax rotundifolia vine fac
5. Betula nigra tree facw 13.
6. Alnus serrulata shrub facw+ 14.
7. Acer rubrum shrub fac 15.
8. Ilex opaca shrub fac- 16.
Percent of Dominant Species that are OBL, FACW, or FAC excluding FAC-). 83
Remarks: Young alluvial hardwood forest.
HYDROLOGY
Recorded Data (Describe In Remarks): Wetland Hydrology Indicators
_ Stream, Lake, or Tide Gauge
Aerial Photographs Primary Indicators:
_ Other Inundated
x Saturated in Upper 12"
No Recorded Data Available Water Marks
x Drift Lines
Field Observations: Sediment Deposits
x Drainage Patterns in Wetlands
Depth of Surface Water: 0 (in.) Secondary Indicators:
x Oxidized Roots Channels in Upper 12"
Depth to Free Water in Pit: 6 - 18 (in.) x Water-Stained Leaves
Local Soil Survey Data
Depth to Saturated Soil: 3 - 12 (in.) X FAC-Neutral Test
_ Other (Explain in Remarks)
Remarks: Floodplain depressions south of Reedy Fork Creek, hydrology may be influenced by adjacent WTP
backwash settling ponds since 1969.

r ~
LJ
•
SOILS
JB & JC forested wetlands
(Series and Phase): Chewacla sandy loam; Wehadkee silt loam Drainage Class: somewhat poorly, poorly
Taxonomy (Subgroup): Ch = fluvaquentic dystrochrepts Confirm Mapped Type? Yes No
Wh = ty~ic fluvaquents
Profile Description:
Depth Matrix Colors Mottle Colors Mottle Texture, Concretions,
inches Horizon (Munsell Moist) (Munsell Moist) Abundance/Contrast Structure, etc.
10 2.SY 4/2 lOYR 5/5 common/distinct
Hydric Soil Indicators:
Histosol Concretions
Histic Epipedon High Organic Content in SurFace Layer in Sandy Soils
Sulfidic Odor Organic Streaking in Sandy Soils
Aquic Moisture Regime Listed On Local Hydric Soils List
Reducing Conditions Listed on National Hydric Soils List
X Gleyed or Low-Chroma Colors Other (Explain in Remarks)
Remarks:
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes x No Is the Sampling Point
Wetland Hydrology Present? Yes x No Within a Wetland? Yes x No
Hydric Soils Present? Yes x No
Remarks: The area north of wetland boundary line JB 1-4 (bounded by the south bank of Reedy Fork Creek) and
area east of JC l -19 are classified as wetlands based upon the criteria set forth in the l 987 Army Corps of Engineers
Wetlands Delineation Manual.
•

DATA FORM
ROUTINE WETLAND DETERMINATION
(1987 COE Wetlands Determination Manual)
•
•
U
GA, JB, JC uplands
Project /Site: Lake Townsend Dam Repair, Greensboro Date: 25 Aug 2006
Applicant /Owner: City of Greensboro Utilities County: Guilford
Investigator: Gerald Pottern, Jessi O'Neal, R.J.Goldstein & Assoc. State: NC

Do normal circumstances exist on the site? ves X No Community ID: forest
Is the site significantly disturbed (Atypical situation)? ves No X Transect ID: GA I-50,
Is the area a potential problem area? ves No X GA100-153 JBI- JC 19
(explain on reverse if needed) Plot ID:
VEGETATION
Dominant Plant Suedes Stratum Indicator Dominant Plant Suedes Stratum Indicator
1. Liquidambar styraciflua tree fac+ 9. Elea ng us angustifolia shrub fac
2. Ouercus alba tree facu 10. Lonicera japonica herb fac-
3. Liriodendron tulipifera tree fac 11. Rosa multiflora shrub NR
4. Carya cordiformis tree fac 12. Smilax rotundifolia vine fac
5. Fagus grandifolia tree facu 13. Pinus taeda tree fac
6. Quercus nigra tree fac 14. Ligustrum sinense shrub fac
7. Cornus florida shrub facu 15.
8. Ilex opaca shrub fac- 16.
Percent of Dominant Species that are OBL, FACW, or FAC excluding FAC-). 61
Remarks: Non-wetland floodplain and levee forests along Reedy Fork Creek and tributary.
HYDROLOGY
Recorded Data (Describe In Remarks): Wetland Hydrology Indicators
Stream, Lake, or Tide Gauge
_ Aerial Photographs Primary Indicators:
_ Other Inundated
Saturated in Upper 12"
_ No Recorded Data Available Water Marks
Drift Lines
Field Observations: Sediment Deposits
Drainage Patterns in Wetlands
Depth of Surface Water: (in.) Secondary Indicators:

Depth to Free Water in Pit: (in.) Oxidized Roots Channels in Upper 12"
Water-Stained Leaves
Local Soil Survey Data
Depth to Saturated Soil: > 15 (in.) FAC-Neutral Test
Other (Explain in Remarks)
Remarks: No saturation within 12", despite winter season and recent rainfall
SOILS
GA2 - 25 upl

•
Map Unit Name
(Series and Phase): Chewacla sandy loam; Madison sandy loam
Drainage Class: Ch =somewhat poorly; Ma =well drained
Taxonomy (Subgroup): Ma = ty_pic hapludults Confirm Mapped Type? Yes No
Ch = fluvaquentic dystrochrepts
Profile Description:
Depth Matrix Colors Mottle Colors Mottle Texture, Concretions,
(inched Horizon (Munsell Moistl (Munsell Moist) Abundance/Contrast Structure, etc.
12 B lOYR 4/3 7.SYR 5/4 common/ faint
Hydric Soil Indicators:
Histosol Concretions
Histic Epipedon High Organic Content in Surface Layer in Sandy Soils
Sulfidic Odor Organic Streaking in Sandy Soils
Aquic Moisture Regime Listed On Local Hydric Soils List
Reducing Conditions Listed on National Hydric Soils List
Gleyed or Low-Chroma Colors Other (Explain in Remarks)
Remarks: Augusta, Chewacla, Congaree, and Wehadkee soils on Swift Creek floodplain grade into Cecil sandy
loam on adjacent slopes.
WETLAND DETERMINATION
Hydrophytic Vegetation Present? Yes x No Is the Sampling Point
Wetland Hydrology Present? Yes No x Within a Wetland? Yes_ No x
Hydric Soils Present? Yes No x
Remarks: Theses areas west of wetland boundary line GA 1-50, south of GA 100-153, south of JB 1-4, and west
of JC 1-19 are not classified as wetlands based upon the criteria set forth in the 1987 Army Corps of Engineers
Wetlands Delineation Manual.
•

Lake Townsend Dam Replacement Individual 404/401 Permit Application and Support Document
r' 7 /±
REFERENCES
Adams, W F., J.M. Alderman, R.G. Biggins, A.G. Gerberisch, E.P. Keferl, H.J. Porter, and A.S. VanDevender. 1990. A report on
the conservation status of North Carolina's freshwater and terrestrial molluscan fauna. The Scientific Council on Freshwater and
Terrestrial Mollusks, Raleigh, N.C. 246 pp.
Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual, Technical Report Y-87-1. U.S. Army Engineer
Waterways Experiment Station, Vicksburg, Miss. 100 pp. + appendices.
FEMA Flood Insurance Rate Maps. (June 4, 1980). Community Panel Number 37011100658, Guilford County, North Carolina, Downloadable
from http://msc.fema. qov/webapp/wcs/stores/servlebFemaWelcomeView?storeld=10001 &cataloald=10001 &lanald=-1
Lee, D.S., J.B. Funderburg, Jr., and M.K. Clark. 1982. A distributional survey of North Carolina mammals. Occasional Papers of the North
Carolina Biological Survey, 1982-10. 70 pp.
Martof, B.S., W.M. Palmer, J.A. Bailey, and J.R. Harrison III, 1980. Amphibians and reptiles of the Carolinas and Virginia. University of North
Carolina Press, Chapel Hill, N.C. 264 pp.
Menhinick, E.F. 1991. The Freshwater Fishes of North Carolina. N.C. Wildlife Resources Commission, Raleigh, N.C. 227 pp.
Menhinick, E.F. and A.L. Braswell. 1997. Endangered, Threatened, and Aare Fauna of North Carolina, Part IV: A Re-evaluation of the
Freshwater Fishes. N.C. Museum of Natural Sciences, Raleigh, N.C. 106 pp.
N.C. Division of Land Resources. 1985. Geologic map of North Carolina. N.C. Department of Natural Resources and Community
Development -Geological Survey, Raleigh. 1 p.
N.C. Division of Water Quality. 2005. Cape Fear River Basinwide Water Quality Management Plan. Department of Environment and Natural
Resources, Raleigh, NC.
Potter, E.F., J.F. Parnell, and R.P. Teulings. 1980. Birds of the Carolinas. University of North Carolina Press. Chapel Hill, N.C. 408 pp.
Radford, A.E., H.E. Ahles, and C.R. Bell, 1968. Manual of the Vascular Flora of the Carolinas. University of North Carolina Press, Chapel Hill,
N.C. 1,183 pp.
Stephens, R.B. 1977. Soil survey of Guilford County, North Carolina. U.S. Soil Conservation Service. Raleigh, N.C. 77 p. + maps.
Webster, W.D., J.F. Parnell, and W.C. Biggs, Jr. 1985. Mammals of the Carolinas, Virginia, and Maryland. University of North Carolina Press,
Chapel Hill, N.C. 255 pp.
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REF-7
P:\Greensboro\Townsend Dam-130603\Permitting\Individual Permit\Individual Permit Support Documentv4.doc