20140021 Ver 1_401 Application_20131213

1221 Corporation Parkway, Suilc 100
Raleigh, North Carolina 27610
18 December 2013
Robert J. Goldstein and Associates, Inc.
RJG &A ENVIRONMENTAL CONSULTANTS
Since 1985
Ms. Christy Wicker
US Army Corps of Engineers
69 Darlington Ave
Wilmington, NC 28403
20 140 2 r
0 R @1M a Pot
EIE e ff (9'1 8 �2 -1 74
ax: (919) 872- 14
Re: PCN for Ledbetter Lake Dam Repair, Rockingham, Richmond Co (PeeDee River basin).,
Dear Christy,
Attached is the PCN for the proposed repairs to Ledbetter Lake Dam on Hitchcock Creek, three
miles northeast of downtown Rockingham. On Novemeber 18 1 emailed you a brief project
description and figures, and on November 21 you replied, concurring that the work was eligible
for Section 404 permitting using NWP -3 for repair and maintenance.
As documented in the attached PCN, I found no wetlands along the affected lake shoreline,
stream banks below the dam, or off -site borrow area. The receiving stream (Hitchcock Creek)
and the lake are the only jurisdictional waters affected. The lake was drawn down in 2012 as
requested by NC Dam Safety Program (see enclosed figures) and most of the lake bed is
currently dry, except for a small pool just in front of the old spillway gates. Let me know if you'd
like to arrange a site visit to confirm my findings or discuss the project.
The project will include the following much - needed structural and safety improvements to the
dam: 1) demolish the deteriorated upper portion of the primary spillway, outlet gates, training
walls, powerhouse, and penstock; 2) rebuild the primary spillway at the existing crest elevation,
encasing it in a concrete monolith and widening the base to improve structural stability; 3)
rebuild the outlet works and non - overflow dam section (left abutment) between the primary
spillway and the mill building, installing new gates and controls; 4) rebuild the earth
embankment and training wall between the primary spillway and Ledbetter Rd (right abutment)
with a drain system to capture and convey seepage. The project as described herein, designed
by Schnabel Engineering of Greensboro, will include the following unavoidable impacts to the
stream and open waters (lake).
Impacts Perm Temp
Stream (lin.ft)
15.0 lin.ft
92.0 lin.ft
Stream (acre)
0.0413 ac
0.1002 ac
Lake (acre)
0.0174
2.531 ac
The "temporary" lake impacts do include permanent changes to the lake bed elevation
(excavation of Borrow Area 1 north of the dam, and fill, excavation and grading in front of the
NEPA & SEPA Environmental Documents- EA, EIS, CE / Jurisdictional Wetland & Stream Duffer Delineations / 404 - 401 Permits / G1S/GPS Mapping f Water
Quality Studies / Stream & Wetland Mitigation and Restoration I Endangered Species Surveys / Biological Assessments & Conservation Plans / Water Intakes &
Reservoirs / Water Lines & Treatment Plants / Sewerlines & Wastewater Treatment / Insiream Flow Analyses / Interbasin Transfer Certificates / Watershed
Assessment & Management / Archaeological Surveys and Testing / Phase 1 Site Assessments I Parks & Greenways Planning / CWMTF Grant Applications

Robert J. Goldstein and Associates, Inc.
RJG &A ENVIRONMENTAL CONSULTANTS
spillway and embankment) but these changes do not result in loss of waters or impairment of
function, and are thus tallied as temporary impacts.
The State Historic Preservation Office (SHPO) sent a project response letter stating that the
Ledbetter Manufacturing Company mill building might be eligible for listing in the National
Register of Historic Places. However, the deteriorated condition of Ledbetter Dam would make
it a non - contributing element if the mill is proposed for NRHP listing. SHPO concurs that the
proposed dam repair will have no effect on historic properties.
Feel free to email or call me or Rob Indri at Schnabel Engineering if you have any questions
about this project and its impacts to jurisdictional waters or other resources.
Sincerely,
A4�WPN_7
Gerald Pottern, senior biologist
gi)[e-mail]
919- 872 -1174
Copies To: NC Division of Water Quality (5 copies + 401 Review Fee Check)
Schnabel Engineering
ATTACHMENTS
Pre Construction Notification (PCN) Form
Agent Authorization Letter from Frank Parker
SHPO Project Review Letter, 17 Dec 2013
Figure 1. Project Vicinity Map USGS Topographic Quad
Figure 2. USDA Soil Survey Map
Figure 3. Google Earth Aerial Photo of Ledbetter Dam & Mill
Figure 4. Google Earth Aerial Photo of Proposed Borrow Areas
Figure 5. Rockingham County GIS, Property Ownership Map
Figure 6A -B. Ledbetter Dam, Existing Conditions Site Plan
Figure 7A -D. Ledbetter Dam, Proposed Demolition of Structures
Figure 8A -B. Ledbetter Dam, Stage 1 Construction & Cofferdams
Figure 9A -B. Ledbetter Dam, Stage 2 Construction & Cofferdams
Figure 10. Ledbetter Dam, Final Grading and Spillway Buttress
Figure 11. Right Embankment Fill, Riprap, and Drain System
Figure 12. Spillway Improvements, Upstream Face in Lake.
Figure 13A -B. Spillway Stability Buttress Plan and Cross- Section
Figure 14. Proposed Low -Level Outlet and Gate
Figure 13. Embankment and Training Wall Drain System Plan
Page 2
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Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.3 Dec 10 2008
Pre - Construction Notification (PCN) Form
A. Applicant Information
1. Processing
1 a. Type(s) of approval sought from the
Corps:
®Section 404 Permit ❑Section 10 Permit
1 b. Specify Nationwide Permit (NWP) number: NWP -3 or General Permit (GP) number:
1c. Has the NWP or GP number been verified by the Corps?
® Yes: Christy Wicker ❑ No
1 d. Type(s) of approval sought from the DWQ (check all that apply):
® 401 Water Quality Certification — Regular ❑ Non -404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization
1 e. Is this notification solely for the record
For the record only for DWQ 401
For the record only for Corps Permit:
because written approval is not required?
Certification:
NA
project no:
❑ Yes ® No
❑ Yes ® No
1f. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation
❑ Yes ® No
of impacts? If so, attach the acceptance letter from mitigation bank or in -lieu
Dam & Creek Floodplain: Ledbetter Lake Dam Mgmt LLC, c% Frank Parker.
fee program.
Mill Building Property S of Dam: Carolyn's Mill Inc., William & Carolyn Ussery.
1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1h
❑ Yes ® No
below.
Borrow Area W of Ledbetter Rd: Family Dreams LLC, c% James M. Ledbetter 111.
1 h. Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes ® No
2. Project Information
2a. Name of project:
Ledbetter Lake Dam Repair
2b. County:
Richmond
2c. Nearest municipality /town:
Rockingham (Dam is 3 miles NE of downtown, on Ledbetter Rd)
2d. Subdivision name:
NA
2e. NCDOT only, T.I.P. or state
NA
project no:
3. Owner Information
Dam & Creek Floodplain: Ledbetter Lake Dam Mgmt LLC, c% Frank Parker.
3a. Name(s) on Recorded Deeds:
Mill Building Property S of Dam: Carolyn's Mill Inc., William & Carolyn Ussery.
Lake Shoreline N of Dam: Claria H. Alexander.
Borrow Area W of Ledbetter Rd: Family Dreams LLC, c% James M. Ledbetter 111.
)Yc 0
&JRP2
See Figure 5 for Deed Book & Page Numbers, PIN #s, & Owner Addresses
L �t i, d 7 Z0;3
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etlannwa^.ar Sra ncn
Page 1 of 12
PCN Form — Version 1.3, Dec 2008

3c. Responsible Party (for LLC ):
Frank Parker
3d. Street address:
184 Frank Parker Rd, Rockingham NC 28379
3e. Mailing Address:
Ledbetter Lake Dam Mgmt LLC: 184 Frank Parker Rd, Rockingham NC 28379
(See Figure 5 for other owners mailing addresses)
3f. Telephone no.:
910 - 997 -6400
3g. Fax no..
4e. City, state, zip:
3h. Email address:
4f. Telephone no.:
4. Applicant Information (if different from owner)
4a. Applicant is:
❑ Agent ❑ Other, specify:
4b. Name:
Frank Parker
4c. Business name:
Ledbetter Lake Dam Mgmt LLC
4d. Street address:
184 Frank Parker Rd,
4e. City, state, zip:
Rockingham NC 28379
4f. Telephone no.:
910- 997 -6400
4g. Fax no..
gpottern @RJGAcarolina.com
4h. Email address:
5. Agent/Consultant Information (if applicable)
5a. Name:
Gerald Pottern (Environmental Consultant, Permitting Agent)
5b. Business name:
Robert J Goldstein & Associates, Inc.
5c. Street address:
1221 Corporation Pkwy, suite 100
5d. City, state, zip:
Raleigh, NC 27610
5e. Telephone no.:
919 - 872 -1174
5f. Fax no.:
919 - 872 -9214
5g. Email address:
gpottern @RJGAcarolina.com
6a. Name:
Robert Indri, P.E. (Engineering Consultant)
6b. Business name:
Schnabel Engineering
6c. Street address:
11 -A Oak Branch Drive
6d. City, state, zip:
Greensboro, NC 27407
6e. Telephone no.:
336 - 274 -9456
6f. Fax no.:
336- 274 -9486
6g. Email address:
rindri @ schnabel - eng.com
Page 2 of 12
PCN Form — Version 1.3, Dec 2008

B. Project Information and Prior Project History
1. Property Identification
1 a. Property identification no. (tax PIN or parcel ID):
Ledbetter Lake Dam Mgmt LLC: PIN 7485 0450 9246.
(See Figure 5 for other owners & PIN numbers)
1 b. Site coordinates (decimal degrees): (Ledbetter Dam)
Latitude: 34.9845 Longitude: - 79.7146
1 c. Property size:
Dam property = 2.92 acres
(See Figure 5 for other parcel acreages)
2. Surface Waters
2a. Name of nearest body of water (stream, river, etc.):
Ledbetter Lake, Hitchcock Creek
2b. Water Quality Classification of nearest receiving water:
Class WS -III (Rockingham water intake is located on
Roberdel Lake 2 mi downstream of Ledbetter Dam)
2c. River basin:
PeeDee River: DWQ: 03- 07 -16, USGS: 03040201
3. Project Description
3a. Describe the existing conditions on the site and general land use in the vicinity of the project at time of this application:
Ledbetter Dam was built on Hitchcock Creek about 1910, replacing a smaller mill dam built in the 1800s. The dam provided
power for Ledbetter Manufacturing Company, a textile mill that operated until 1979. The existing dam is approximately 35 feet
high with a 120 foot long concrete- masonry primary spillway crest. To the left (south) of the primary spillway is an 80 foot
long concrete- masonry non - overflow segment that connects to the north wall of the old mill building, and includes the
hydroelectric penstock, wet well, turbine and powerhouse. The hydroelectric facility has not been functional for several
decades, and the dam is not regulated by FERC. The right abutment is earth -fill, and extends northward from the primary
spillway about 400 feet toward Ledbetter Rd. The dam's auxiliary (emergency) spillway is 150 feet long and located near the
north end of the right abutment. Flood -stage flow from the auxiliary spillway flows southward parallel to Ledbetter Rd,
entering the north bank of Hitchcock Creek immediately east of Ledbetter Rd (SR- 1442).
Ledbetter Dam has a 73 sq.mi. drainage basin area and is designated a High- Hazard Dam by the NC Dam Safety Program. The
lake serves as an amenity for adjacent property owners, including condominiums in the former mill building, and provides
supplementary water supply storage for the City of Rockingham's intake on Roberdel Lake about 2 miles downstream, which
has far less storage capacity than Ledbetter Lake. Ledbetter Lake was drained in late 2012 to early 2013 following inspection
by NC Dam Safety Program staff that revealed leaks, structural damage and deficiencies that might result in dam failure.
Currently (Fall 2013) the lake level is about 22 feet below normal pool and the lake bed is mostly a dry mudflat, with the
original two stream channels and a few isolated shallow pools remaining. In 2013 the lakefront property owners established an
LLC to purchase the dam from the previous owner (R.E.C., LLC) and to obtain funding to repair the dam.
Hitchcock Creek is 120 feet wide at the toe of the dam, and narrows to 50 feet wide at the Ledbetter Rd bridge about 200 feet
downstream (west) of the dam. Sand and gravel are the predominant stream bed materials, plus some cobble apparently placed
for erosion control along the banks. A powerline parallels the road east of the bridge, and the stream banks between the dam
and the bridge are non - forested except for a few large trees along the south bank, between the powerline and the left abutment.
The flow pathway below the auxiliary spillway is grassed, and follows the powerline southward from the north end of the dam
embankment to the creek. Except for the mill condominiums, the surrounding land is low density rural residential and forest.
The proposed soil borrow site west of Ledbetter Rd is recently clearcut land.
Page 3 of 12
PCN Form — Version 1.3, Dec 2008

3b. List the total estimated acreage of all existing wetlands on the property:
RJG &A biologist Gerald Pottern examined the Ledbetter Dam project area for wetlands and waters on 10 Sept 2013. Neither
the stream nor the lake shoreline was found to have wetlands, other than the typical line of hydrophytic herbs, shrubs, and
saplings that occur along most stream and pond shorelines. The transition from upland to open water (lake) or stream is abrupt
throughout the dam repair construction area. Wetlands occur elsewhere along the lake shoreline, well beyond the project
construction area. The lake bed was mostly dry to a depth of 20 feet below the normal pool elevation at the time of RJG &A's
field visit. Borrow Area 1 is within the drained lake bed and is presently dry, but shall be considered "open waters" for
quantifying impacts. Borrow Area 2 is on cleared uplands west of Ledbetter Rd, across the street from Carolyn's Mill.
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
The only stream in the project area is Hitchcock Creek, which flows 200 feet on the project site from the toe of Ledbetter Dam
to the Ledbetter Rd bridge, and varies in width from 120 feet at the dam to 50 feet at the bridge. It is obviously a perennial
stream, with a sand and gravel dominated substratum and aquatic life including sunfish, darters, crayfish, benthic insects,
salamanders, and tadpoles. This stream is mapped on both the USGS Topographic Quadrangle (Hamlet) and the USDA Soil
Survey of Richmond County (Sheet 8).
3d. Explain the purpose of the proposed project:
NC Dam Safety Inspectors examined Ledbetter Dam during April and July 2012 and issued a Notice of Deficiency (NOD) on
20 July 2012 identifying several problems and maintenance issues that could result in dam failure during high flow events or
seismic activity. Reported problems include cracks and leaks on the left side of the spillway, concrete deterioration, seepage
through the embankment, stability of the embankment, impaired bottom drain operation, and inadequate spillway capacity. The
NOD instructed the owner to prepare an Emergency Action Plan and to drawdown the lake at least five feet until permanent
repairs are completed. During 2013, the lake was drawn down to the lowermost gate to remove accumulated logs and debris, in
preparation for repairs.
The proposed repair work designed by Schnabel Engineering will bring Ledbetter Dam into compliance with current NC Dam
Safety Program structural and hydraulic safety standards for a high- hazard dam. The deteriorated upper portion of the concrete -
masonry spillway will be partially demolished and rebuilt at the existing normal spillway elevation (230.1 feet). The normal -
stage spillway width will be widened from 85 feet to 120 feet by removing the mid -stage steps at each end, thus increasing flood
capacity. The downstream face of the spillway and non - overflow sections will be buttressed with a mass concrete overlay,
widening the dam footprint. The existing penstock and intake will be modified into a dual - purpose low -level outlet and
penstock capable of future hydroelectric use, should the owner decide to rehabilitate the hydroelectric facility at some time.
(Hydroelectric rehabilitation is not part of this proposed project). The new outlet gates will include a trash rack and operating
platform for the gate controls. The right embankment will be raised slightly and the auxiliary spillway improved to provide
hydraulic capacity for 1/3 Probable Maximum Precipitation (PMP) loading conditions without overtopping the dam. A new
stability berm and drain system will be installed to reinforce and collect seepage from the embankment. The rebuilt spillway and
outlet structure will provide non - erosive flow velocity in the receiving stream. The lake's normal pool elevation will remain the
same at 230.1 feet.
3e. Describe the overall project in detail, including the type of equipment to be used:
Stage 1 Construction (Left Side): 1. Install erosion and sediment control features, while maintaining the lake in its current
dewatered condition, about 20 to 22 feet below normal pool. 2. Remove wood, debris and unsuitable soils in front of the dam
using an excavator. 3. Establish haul roads on both sides of the embankment with access from Ledbetter Road at the north end
of the dam. 4. Construct the Stage 1 upstream and downstream cofferdams to isolate the left side of the spillway, using a
combination of earth fill and inflatable "Super Sack" cofferdams. 5. Convey flow through the two existing rectangular low -
level gate openings on the right side of the spillway. 6. Demolish selected upper portions of the existing spillway, left non -
overflow section, generator building, penstock, and ancillary structures identified in Figures 7A -7E. 7. Excavate and prepare the
spillway foundation for the new concrete buttress upstream and downstream, and grade the lake bed to create an approach
channel upstream of the new low -level outlet. 8. Construct the left side of the new primary spillway (elev = 230.1 ft), concrete
buttress, non - overflow wall, and outlet works, including a new 72 -inch diameter steel conduit (invert elev = 208.0 ft). The
outlet gate on the conduit will be installed at end of Stage 2 after NC Dam Safety approves the dam repair work. 9. Remove the
upstream and downstream cofferdams to convey flow through the new 72 -inch outlet.
Page 4 of 12
PCN Form — Version 1.3, Dec 2008

3e. Continued:
Stage 2 Construction (Right Side): 1. Install the Stage 2 upstream and downstream cofferdams (combination of earth fill and
Super Sack cofferdams) to isolate the right side of the spillway, and convey flow through the new 72 -inch conduit on the lel't
side. 2. Excavate and prepare the spillway foundation for the new concrete buttress upstream and downstream, and reconstruct
the right side of the spillway and buttress, sealing off the old gate openings. 3. Excavate lake sediment from borrow area 1 (1.50
acres), and redeposit it adjacent to the right abutment, grading the lake bed to create a stable 3:1 slope. 4. Rebuild the right
spillway training wall with structural concrete and install drain system. 5. Clear and grub borrow area 2 within project limits as
necessary (2.0 acres). 6. Place earth fill, bedding stone and riprap along the upstream embankment wrap - around on the right
side of the spillway, with 3:1 slope. 7. Remove the upstream and downstream cofferdams on the right side of the spillway. 8.
Place earth fill, drain fill, and riprap slope protection on the downstream face of the right embankment. 9. Restore the site, apply
topsoil and re -seed disturbed areas, then remove equipment and temporary erosion control features. 10. Install railings, stairs,
control platform and other improvements on the left side of the spillway. 11. During a period of low flow with favorable
weather forecast, insert stop logs upstream of the 72 -inch outlet pipe and install the steel bulkhead plate and new gate.
Minimum in- stream flow (13 cfs) will be maintained via pump or siphon during gate installation while the outlet pipe is
blocked. 12. Once the gate is installed and approved by the engineer, remove the stop logs to restore flow through the outlet
pine. 13. Obtain aaaroval from NC Dam Safetv Program before closing the gate to refill the lake.
4. Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
❑Yes No ❑Unknown
Corps or State been requested or obtained for this property /
❑ Yes ® No ❑ Unknown
project (including all prior phases) in the past?
❑ Yes ® No
4b. If the Corps made the jurisdictional determination, what type
❑ Preliminary ❑ Final
of determination was made?
4c. If yes, who delineated the jurisdictional areas?
Agency /Consultant Company:
Name (if known): Gerald Pottern (consultant)
Other: Robert J. Goldstein & Assoc (RJG &A)
4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
5. Project History
5a. Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past?
❑Yes No ❑Unknown
5b. If yes, explain in detail according to "help file" instructions NA.
6. Future Project Plans
6a. Is this a phased project?
❑ Yes ® No
6b. If yes, explain.
C. Proposed Impacts Inventory
1. Impacts Summary
1 a. Which sections were completed below for your project (check all that apply):
❑ Wetlands ® Streams - tributaries ❑ Buffers
® Open Waters ❑ Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted. > NONE
2a.
2b.
2c.
2d.
2e.
2f.
Wetland impact #
Type of jurisdiction
Permanent (P) or
Type of impact
Type of wetland
Forested
(Corps - 404, 10
Area of impact
Temporary T
if known
DWO - non -404, other
acres
W1 ❑ P ❑ T
❑ Yes
E] No
❑ Corps
E] DWO
None
2g. Total wetland impacts
None
Page 5 of 12
PCN Form - Version 1.3, Dec 2008

2h. Comments:
3. Stream Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
4b.
3a.
3b.
3c.
3d.
3e.
3f.
3g.
Stream impact
Type of impact
Stream name
Perennial
Type of jurisdiction
Average
Impact
number -
& Figure #
(PER) or
(Corps - 404, 10
stream
length
Permanent (P) or
01 ❑ P ®T
intermittent
DWQ - non -404,
width
(linear
Temporary (T)
Ledbetter Lake
Stage 2 cofferdam in lake
(INT)?
other) + Figure #
(feet)
feet)
S1 []POT
Stage 1 Cofferdam
Hitchcock Creek
® PER
❑ INT
® Corps
❑ DWQ Figure 8A
120 ft
60 ft
S2 ❑ P ®T
Stage 2 Cofferdam
Hitchcock Creek
® PER
[__1 INT
® Corps
❑ DWQ Figure 9A
120 ll
92 I't
S3 ®P E] T
Stability buttress
& outlet works
Hitchcock Creek
® PER
❑ INT
® Corps
❑ DWQ Figure 10
12011
15 ft
06 ❑ P ®T
Ledbetter Lake
Sed fence stone outlets along
Lake, Figure 813
(1.0014 acre
3h. Total stream and tributary impacts
92-ft
3i. Comments: The affected stream area at the toe of the dam is widened and pool -like. The Stage 1 temporary coffer dam will
cover 0.0714 acre of streambed, and the Stage 2 temporary coffer dam will cover 0.0388 acre of streambed, including 0.0100 acre
of overlap. The total temporary cofferdam footprint in the stream is thus 0.1002 acre. The downstream stability buttress
(permanent stream impact) is 15' x 120' = 0.0413 acre Because all
stream impacts will be within the same stream reach at the toe
of the dam, the stream impact lengths are not additive.
0.0174 acre
4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then individually list all open water impacts below.
4a.
4b.
4c.
4d.
4e.
Open water
Name of waterbody
impact number -
(if applicable)
Type of impact
Waterbody type
Area of impact (acres)
Permanent (P) or
& Figure #
Tem orar
01 ❑ P ®T
Ledbetter Lake
Stage 1 cofferdam in lake
Lake, Figure 8A
0.1730 acre
02 ❑ P ® T
Ledbetter Lake
Stage 2 cofferdam in lake
Lake, Figure 9A
0.1144 acre
03 ❑ P ®T
Ledbetter Lake
Excavate, fill and grade for
Lake, Figure 10
0.3018 acre
spillway approach
04 ❑ P ® T
Ledbetter Lake
Fill and grade for right
embankment stabilization
Lake, Figure 10
0.7282 acre
05 []POT
Ledbetter Lake
Excavate borrow area 1 for right
Lake, Figure 4
1.50 acre
embankment fill material
06 ❑ P ®T
Ledbetter Lake
Sed fence stone outlets along
Lake, Figure 813
(1.0014 acre
right embankment grading area
07 ®P ❑ T
Ledbetter Lake
Stability buttress & gates
Lake, Figure 10
0.0174 acre
4f. Total open water impacts
Perm = 0.0174 acre
Temp'= 2.531 acre
Page 6 of 12
PCN Form - Version 1.3, Dec 2008

4g. Comments: Impacts 03, 04 and 05 are permanent changes to the lake bed elevation, but do not result in loss of waters or
change in function, and are thus tallied as temporary impacts (total 2.530 acres). The Stage 1 and Stage 2 temporary cofferdams are
within impact area 03 (grading for spillway approach) and thus their impact areas arc not additive. rill and grading in the lake (03
and 04) are required to widen the dam embankment slope to 3:1 for dam safety purposes, and to prevent shoreline erosion and
slumping in front of the rebuilt spillway. Areas 04 and 05 are already drained and dry, and the remaining wet portions of areas
01, 02 and 03 will be dewatered prior to excavation, filling and grading.
5. Pond or Lake Construction
If Pond or lake construction proposed, then complete the chart below.
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
5a.
5b.
5c.
5d.
5e.
❑ Neuse ❑ Tar - Pamlico
Wetland Impacts (acres)
Stream Impacts (feet)
Upland
Pond ID
Proposed use or purpose of
6b.
6c.
(acres)
number
pond
6g.
Buffer impact #
Permanent (P) or
Reason for impact
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
P1
[Repair Existing Lake]
0
0
0
0
0
0
0
P2
❑ No
5f. Total
6h. Total buffer impacts
NA
NA
5g. Comments: Rehabilitation of existing dam
and spillway.
Pool elevation and area will not change.
5h. Is a dam high hazard permit required?
®Yes [3 No If yes, permit ID no:
Ledbetter Lake Dam is classified by NC Dam
NC Dam Safety NID ID# NC00653, State ID# RICHM -028
Safety Program as a high - hazard dam.
5i. Expected pond surface area (acres):
Approx 300 acres at normal pool (existing lake)
5j. Size of pond watershed (acres):
: Approx 84 sq mi = 53,770 acres
5k. Method of construction:
Earthen embankment, concrete- masonry spillway
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
below. If any impacts require mitigation, then
you MUST fill out Section D of this form.
6a.
❑ Neuse ❑ Tar - Pamlico
❑ Other:
Project is in which protected basin?
❑ Catawba ❑ Randleman
6b.
6c.
6d.
6e.
6f.
6g.
Buffer impact #
Permanent (P) or
Reason for impact
Buffer mitigation
Zone 1 impact
Zone 2 impact
Temporary T
Stream name
required?
(square feet
s uare feet
B1 ❑P ❑T
El Yes
❑ No
6h. Total buffer impacts
NA
6i. Comments:
D. Impact Justification and Mitigation
1. Avoidance and Minimization
Page 7 of 12
PCN Form — Version 1.3, Dec 2008

1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
The spillway and embankment must be stabilized and widened to meet current safety requirements, so it is not possible to avoid
impacts in the stream and lake. The rebuilt structures are designed to occupy the existing dam footprint to the extent practicable,
and the existing normal pool elevation and area will be preserved. The rebuilt outlet will include a minimum flow release pipe, and
both outlets are designed to protect against erosion of the stream channel. Open water impacts within the lake will he mostly
temporary (dewatering, cofferdam, excavation and backfill), relocating lake bed sediment from one area to another. Depths will
change but no loss of lake bed area or function will occure. Required fill material for the downstream embankment improvements
till will be taken from a previously - cleared upland site across the street from the dam.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
Temporary cofferdams in the lake bed and stream will isolate half of the spillway during each stage of construction, keeping the
work area dewatered to minimize erosion, turbidity, and potential concrete toxicity. Flow to the stream will be maintained through
the existing low -level outlet while the left side is repaired, then through the new left side outlet pipe while the right side is repaired.
A siphon or pump will maintain the required minimum flow (13 cfs) while the gate on the new outlet pipe is being installed.
Appropriate DLR- approved erosion and sedimentation controls will be implemented to protect waters and adjacent lands along the
stream, lake shore, and soil borrow areas.
2. Compensatory Mitigation for Impacts to Waters of the U.S, or Waters of the State
a. Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State?
❑ Yes ® No
2b. If yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
c. If yes, which mitigation option will be used for this project?
❑ Mitigation bank
❑ Payment to'in -lieu fee program
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
a. Name of Mitigation Bank: NA
b. Credits Purchased (attach receipt and letter)
�ype (NA)
Quantity (NA)
c. Comments: NA
4. Complete if Making a Payment to In -lieu Fee Program
a. Approval letter from in -lieu fee program is attached.
❑ Yes
b. Stream mitigation requested:
(NA) linear feet
c. If using stream mitigation, stream temperature:
❑ warm ❑ cool ❑cold
d. Buffer mitigation requested (DWQ only):
NA square feet
e. Riparian wetland mitigation requested:
NA acres
f. Non - riparian wetland mitigation requested:
NA acres
g. Coastal (tidal) wetland mitigation requested:
NA acres
h. Comments:
Complete if Using a Permittee Responsible Mitigation Plan
a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
NA
Page 8 of 12
PCN Form — Version 1.3, Dec 2008

6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
a. Will the project result in an impact within a protected riparian buffer that requires
❑ Yes ® No
buffer mitigation?
1 b. If yes, then is a diffuse flow plan included? If no, explain why.
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.
Zon
c.
Reason for impact
d.
Total impact
Multiplier
6e.
Required mitigation
e
2e. Who will be responsible for the review of the Stormwater Management Plan?
(square feet)
(square feet)
Zone 1
NA
NA
3 (2 for Catawba)
NA
Zone 2
NA
NA
1.5
NA
6f. Total buffer mitigation required:
NA
g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund).
NA
h. Comments: NA
E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
la. Does the project include or is it adjacent to protected riparian buffers identified
within one of the NC Riparian Buffer Protection Rules?
❑ Yes ® No
1 b. If yes, then is a diffuse flow plan included? If no, explain why.
❑ Yes ❑ No
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project?
NA
2b. Does this project require a Stormwater Management Plan?
❑ Yes ® No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why:
No new development; just in -kind repair of existing dam.
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
2e. Who will be responsible for the review of the Stormwater Management Plan?
❑ Certified Local Government
❑ DWQ Stormwater Program
❑ DWQ 401 Unit
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project? Richmond County
Page 9 of 12
PCN Form — Version 1.3, Dec 2008

F. Supplementary Information
❑ Phase II
❑ NSW
3b. Which of the following locally - implemented stormwater management programs
❑ USMP
apply (check all that apply):
❑ Water Supply
Watershed
❑ Yes ❑ No
❑ Other:
3c. Has the approved Stormwater Management Plan with proof of approval been
❑ Yes
❑ No
attached?
letter.)
4. DWO Stormwater Program Review
2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards,
❑ Coastal counties
4a. Which of the following state - implemented stormwater management programs apply
❑ HOW
❑ Session
❑ ORW
Law 2006
(check all that apply):
-246
3. Cumulative Impacts (DWQ Requirement)
❑ Other:
❑ Yes ® No
4b. Has the approved Stormwater Management Plan with proof of approval been
❑ Yes
❑ No
attached?
5. DWO 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements?
❑ Yes
❑ No
5b. Have all of the 401 Unit submittal requirements been met?
❑ Yes
❑ No
F. Supplementary Information
1. Environmental Documentation (DWO Requirement)
1 a. Does the project involve an expenditure of public (federal /state /local) funds or the
❑ Yes ® No
use of public (federal /state) land?
1 b. If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State
❑ Yes ❑ No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1c. If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
❑ Yes ❑ No
letter.)
2. Violations (DWQ Requirement)
2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards,
❑ Yes ® No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b. Is this an after - the -fact permit application?
❑ Yes ® No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s): NA
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in
❑ Yes ® No
additional development, which could impact nearby downstream water quality?
Page 10 of 12
PCN Form — Version 1.3, Dec 2008

3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWO policy. If you answered "no," provide a short narrative description.
This project will not increase the lake elevation, volume, impounded area, or developable shoreline. This project is solely for dam
safety compliance, not for growth.
4. Sewage Disposal (DWO Requirement)
4a. Clearly detail the ultimate treatment methods and disposition (non- discharge or discharge) of wastewater generated from
the proposed project, or available capacity of the subject facility.
This project will not generate any new sanitary wastewater. Carolyn's Mill condominiums and single - family homes along the lake
shoreline are served either by public sewer or private septic systems.
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or habitat?
❑ Yes ® No
5b. Have you checked with the USFWS concerning Endangered Species Act impacts?
® Yes ❑ No
5c. If yes, indicate the USFWS Field Office you have contacted.
® Raleigh ❑ Asheville
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
Five federally - listed endangered or threatened species are reported from Richmond County, based on US -FWS and NC -NHP
online databases: Red - cockaded Woodpecker, Shortnose Sturgeon, Schweinitz's Sunflower, Rough -leaf L.00scstrife, and
Michaux's Sumac. No suitable habitat for these species exists in or adjacent to the project area, based on field surveys by
RJG &A in September 2013, and none of these species is likely to be affected (see attached report).
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat?
❑ Yes ® No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat
NC -DMF and NC -WRC have not designated any Essential Fish Habitat in Hitchcock Creek.
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal governments have
designated as having historic or cultural preservation status (e.g., National Historic Trust
® Yes ❑ No
designation or properties significant in North Carolina history and archaeology)?
7b. What data sources did you use to determine whether your site would impact historic or archeological resources
Ledbetter Dam is part of the Ledbetter Manufacturing Company textile mill historic site, as recognized by Richmond County and
the NC State Historic Preservation Office (SHPO site # RH0384). It is not listed on the National Register of Historic Places, but the
mill building may be eligible for listing. In response to a project scoping letter submitted by RJG &A, SHPO stated that the
deteriorated condition of the dam would make it a non - contributing element for NRHP listing, and SHPO concurs that the proposed
dam repair will have no effect on historic properties (SHPO letter 17 Dec 2013 attached). However, SHPO did request copies of
any available documentary materials on the dam for their files, including recent and historic photographs (.jpg files), existing and
proposed site plans, and any elevation drawings of the dam (.pdf or .tif files).
Page 11 of 12
PCN Form — Version 1.3, Dec 2008

8. Flood Zone Designation (Corps Requirement)
Sa. Will this project occur in a FEMA- designated 100 -year floodplain?
® Yes ❑ No
8b. If yes, explain how project meets FEMA requirements:
The rebuilt primary spillway, auxiliary spillway, and dam crest are designed to pass the 1/3 PMP design flow in accordance
with current NC Dam Safety design standards. The repaired dam will provide improved safety and flood protection fir
upstream and downstream properties. Schnabel Engineering has prepared a No -Rise Certification Letter based on I IEC -RAS
modeling which shows a "no- rise" condition.
8c. What source(s) did you use to make the floodplain determination? Richmond County FIRM Panel #7484 (viewed on
www.nclloodmaps.coni) indicates a 100 -yr flood hazard elevation (zone AE) of 238 feet along the lake shoreline near the dam,
and 223 feet at the Ledbetter Rd bridge.
Gerald Pottern
IS December 2013
Applicant/ Agent's Printed Name
Applicant or Agent's Signature
Date
(Agent's signature is valid only if an authorization letter from applicant is provided.)
ATTACHMENTS
Agent Authorization Letter from Frank Parker
SHPO Project Review Letter, 17 Dec 2013
Figure 1. Project Vicinity Map USGS Topographic Quad
Figure 2. USDA Soil Survey Map
Figure 3. Google Earth Aerial Photo of Ledbetter Dam & Mill
Figure 4. Google Earth Aerial Photo of Proposed Borrow Areas
Figure 5. Rockingham County GIS, Property Ownership Map
Figure 6A -B. Ledbetter Dam, Existing Conditions Site Plan
Figure 7A -D. Ledbetter Dam, Proposed Demolition of Structures
Figure 8A -B. Ledbetter Dam, Stage 1 Construction & Cofferdams
Figure 9A -B. Ledbetter Dam, Stage 2 Construction & Cofferdams
Figure 10. Ledbetter Dam, Final Grading and Spillway Buttress
Figure 11. Right Embankment Fill, Riprap, and Drain System
Figure 12. Spillway Improvements, Upstream Face in Lake.
Figure 13A -B. Spillway Stability Buttress Plan and Cross - Section
Figure 14. Proposed Low -Level Outlet and Gate
Figure 13. Embankment and Training Wall Drain System Plan
Page 12 of 12
PCN Form — Version 1.3, Dec 2008

AGENT AUTHORMATION FORM for SK00n 404 -401 POrmN"all
Wr NO. PLAN NO.. 0450
ADDRESS: E- o = Rd. 1g Wft 1 QVOM's M111 &a gnd Gmn Lake ',r
t... 17' 1 • 11 ► .
• • 1 ' • .-�� r.'�i11. .._• \. •. �.• � � V.•. 1•i - :111 -�11. .... � Y•. 1 ,. L=_ 1.\
Property OWM 2:
Tile under*ned, registered property owners of the above tided prope tyr do hereby aWxxlze
(CMUDChor / Agent) (Now of anti fin)
to act on my behalf and take all adkM necessary for the proca tnQ, Issuenoe and acceptance of this
permit or certMotion and any and all standard and spedal condItIms atrac sed.
Property Owner's Address (If ditrent than property above):
Frank Parker. 184 Frank parker Rd, Rocidnaham. NC 28379
Telephone: [phone]
We twee aertKy the above Infornatlon submltbed In this apOicatfon is true and accurate to the best of
our knowle clue.
A Signature 1 Authorlaed Signature 2
Date• �eec • -3 a � 1. Date:

ilV4 � w
i
North Carolina Department of Cultural Resources
State Historic Preservation Office
Ramona M Harros, Admim.,trator
Governor Pat McCrory
Secretary Susan Klutrr
December 17, 2013
Gerald Pottern
Robert). Goldstein & Associates, Inc.
1221 Corporation Parkway, Suite 100
Raleigh, NC: 27610
l Nliu• ul' Archtu. and I lwm%
I)Lpun',ctrct.uy hetm l hory
Re: Ledbetter Lake Dam Rehabilitation, Rockingham, Richmond County, FR 13 -2794
Dear Mr. Pottern:
Thank you for your letter of November 18, 2013, concerning the above project, which proposes the substantial
rehabilitation of the existing dam to correct severe structural deterioration.
As you know, the dam was part of the Ledbetter Manufacturing Company complex, although earlier mills and
their dams occupied the site since the late 18''' century. The dam's original construction date is unknown, but it
was greatly enlarged, from 5 to 27 feet high, when the present mill building was constructed on the south shore
of the lake, circa 1910 -11.' The Ledbetter Manufacturing Company building was identified during the 1999-
2001 Richmond County Architectural Survey, and despite some insensitive alterations when the building was
renovated for residential use, the mill appears to be polenlialy eligible for listing in the National Register of
Historic Places.
When intact, dams are significant contributing resources to historic mill complexes. However, given the
severely deteriorated condition and lack of structural integrity, this dam would be considered a non-
contributing resource. The mill building itself will not be affected by the proposed protect. Therefore, we
concur that the project as proposed will have no fled on historic properties.
We do request that any readily available documentary materials on the dam be submitted to add to Our files.
These materials may include )PEG files of the photographs enclosed with your letter, historic photographs, a
PDF or TIF file of the existing and proposed site plans, and any elevation drawings of the dam.
The above comments arc made pursuant to Section 106 of the National Historic Preservation Act and the
Advisory Council on Historic Preservation's Regulations for Compliance with Section 106 codified at 36 CPR
Part 800
'American Wool and Cotton Reporter (1W XXIV, No. 31). August 4,1910: 32.
Location 11M1 b -t +t June, Street, Raleigh NC 27601 MmLng Address 4617 Mad Semce Center, Raleigh NC 27699 -4017 Telephone /Fax (919) .407- 6 5711/807 -6 5 9 7

Thank you for your cooperation and consideration. If you have questions concerning; the above comment,
contact Renee Gledhill- Earley, environmental review coordinator, at 919 -807 -6579 or rrnec.g; edh►Il-
earle�i:'ncdcr go v. In all future communication concerning; this project, please cite the above referenced
tracking; number.
Sincerely,
�" A, avA-&.�Et
*"l among M. Bartos
cc: John Massey, Jr, Rockingham Historic Preseivation Commission, john @g;orockingham.com

W-
Branch
Figure 1. Ledbetter Lake Dam: Project Vicinity Map, 3 miles northeast of downtown Rockingham,
Richmond County NC, Hamlet and Millstone USGS Topographic Quadrangles.
Figure 2. USDA Soil Survey of Richmond County NC, Sheet 8, Ledbetter Dam Project Area. AcC = Ailey loamy
sand, 8 -15% slope; UwC = Uwharrie clay loam, 8 -15% slope; UwD = Uwharrie clay loam, 15 -25% slope.

Figure 3. Google Earth aerial image of Ledbetter Dam in Feb 2013, partially drained.
Figure 4. Google Earth aerial image of soil borrow areas for embankment fill material. Borrow area 1= 1.50
acre in dry lake bed. Borrow area 2 = 21 acres in upland, but only 2.0 acres will be used for fill material.

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GIS Parcel Viewer
Figure 5. Rockingham County GIS, Tax Parcels in the Ledbetter Lake Dam project area.
A: Mill Building 5 of Dam (PIN# 7485 - 0450 -7080 = 0.42 ac). Deed Book 1108, Page 270.
Owner: Carolyn's Mill Inc., William & Carolyn Ussery. 150 Twin Oaks, Rockingham NC 28379.
B: Ledbetter Dam & Hitchcock Creek Floodplain (PIN# 7485 - 0450 -9246 = 2.92 ac). Deed Book 1623, Page 617.
Owner: Ledbetter Lake Dam Mgmt LLC. c/o Frank Parker, 184 Frank Parker Rd, Rockingham NC 28379.
C, D, E: Lake & Shoreline N of Dam, includes Borrow Area 1. (PIN# 7485- 0460 -1645 = 2.35 ac, 7485 - 0461 -2084 = 1.58 ac,
7485 - 0451 -9550 = 46.7 ac). Deed Book 1581, Page 532.
Owner: Claria H. Alexander, 1528 Canterbury Rd, Raleigh NC 27608.
F: House west of Ledbetter Rd (PIN# 7484 - 0259 -5941 = 1.63 ac). Deed Book 836, Page 233.
Owner: Richmond County, P.O. Box 504, Rockingham NC 28380
G: Borrow Area 2 west of Ledbetter Rd (PIN# 7484 - 0259 -5941 = 204.5 ac). Deed Book 1581, Page 532.
Owner: Family Dreams LLC. c/o James McQueen Ledbetter III, 9712 Elizabeth Townes Ln, Charlotte, NC 28218.

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Figure 6A. Ledbetter Dam, existing conditions site plan (Left Side).
(Schnabel Plan Sheet 3 of 32). Lake pool is currently drained to - 208 feet.
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Figure 6B. Ledbetter Dam, existing conditions site plan (Right Side).
(Schnabel Plan Sheet 3 of 32). Lake pool is currently drained to - 208 feet.

REMOVE GATE STEMS
AND GATES
DOWNSTREAM FACE
RIGHT SIDE OF SPILLWAY
DEMO WALL
REBUILD TO UPSTREAM LIMIT OF WALL
TOP EL 233.0
UPSTREAM LIMIT OF WALL
Figure 7A. Ledbetter Dam, Demolition Plan Photos 1 -2 (Schnabel Plan Sheet 5 of 32).

Cl
DOWNSTREAM FACE
REMOVE STAIRS
RE- INSTALL TO ACCESS
DEMO WALL TO BOTTOM OF CORBEL
AND TO THE LIMITS SHOWN ON THE STRUCTURAL SHEETS
DEMO GENERATOR BUILDING
AND FOUNDATION
REMOVE METAL STAIRS
REINSTALL FOR ACCESS TO TOE BLOCK
APPRO) "'WE LOCATION OF SOITRIM OF OORN&
LEFT ABUTMENT
Figure 76. Ledbetter Dam, Demolition Plan Photos 3 -4 (Schnabel Plan Sheet 5 of 32).

X
REMOVE LADDER AND RAILING FROM WALL
RE4NSTALL AT END OF PROJECT
DEMO TO EL 225A
FLUSH WITH WET WELL WALL
WET WELL WALL
LEFT ABUTMENT
Figure 7C. Ledbetter Dam, Demolition Plan Photos 5 -6 (Schnabel Plan Sheet 5 of 32).

1:1
UPSTREAM FACE, RIGHT SIDE
UPSTREAM FACE
Figure 7D. Ledbetter Dam, Demolition Plan Photos 7 -8 (Schnabel Plan Sheet 5 of 32).

OVER If
ARMOR UoiTREAM AND OOYW MEAM FACE YIIM wit[
NOTES
et STAGE I EROSION & SEDIMENT CONTROL - PLAN
FLOW
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1 ALIMWTE HA"tlAL MhOLUM APPROVALPMOM TIl MWM* 1l AND NODEM CAM SH[IY
Figure 8A. Ledbetter Dam Stage 1 Eros +Sed Ctrl and Construction, Left Side. (Schnabel Sheet 6 of 32).

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Figure 9A. Ledbetter Dam Stage 2 Eros +Sed Ctrl and Construction, Left Side. (Schnabel Sheet 7 of 32).

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Figure 9B. Ledbetter Dam Stage 2 Eros+Sed Ctrl and Construction, Right Side. (Schnabel Sheet 7 of 32).

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NORMAL POOLTARWATER
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CHR EYITOECRAM«RLET •
TNRU TRAMMO WALL —:
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EN
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EL 270.1 ;
X
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CUTOFF WALL ELm 234.
R7PRAP _•�

_1 +00 0+0D 1+00
290
280
270
200
290
240
230
220
210
200
190
290
280
270
260
250
240
230
220
210
2D0
190
0+80 -0+60 -0+40 -0+20 0+00 0+20 0+40 0+60 G+80 1+00
Figure 11. Proposed Right Embankment Improvements, Fill, Riprap, and Drain System, Cross - section.
0+00
1+00
2 +00 2+40
290-_
290
290
280
270
270
NON - OVERFLOW SECTION
PROPOSED TOP OF DAM
2W
TOP OF WALL EL 239.0
EL
238.5
280
PRIMARY SPILLWAY
250
OPERATORS DECK
LOW STAGE
250
TOP EL 232.5
EL 230.1 (NP)
14.50'
MO
UPSTREAM OVERLAY TOP OF RIPRAP EL 227A
,_...
TOP EL 227.1 CLASS B RIPRAP. 18' THK
13
240
230
230
3
067 STONE. 9' THK
220
I
PROPOSED FINAL GRADE I i
220
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r
I I I
2 I
- - - - ---
GEOTEXTILE
210
-
210
MIN 18-W
I I L I
200
LOW LEVEL OUTLET
200
APPROACH CHANNEL
EXTEND 40' UPSTREAM
ESTIMATED ROCK SURFACE
190
AT EL 205.0
EXCAVATE TO ROCK IN FRONT OF SPILLWAY
EXISTING GRADE
190
1BD
180
0+20 0+40 O+60
0+80 1+00 1 +20 1+40
1+90
1+80
2+00
2 +20
2+40
Figure 12. Proposed Spillway Improvements, Upstream Face in Lake.

Figure 13A. Proposed Spillway Stability Buttress and Right Training Wall improvements, Plan View.
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EL 2,,.,
s
i Hitchcock
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APPROVED PO ATMSWMZ
OR OMAL CONCRETE
Figure 13B. Proposed Spillway Stability Buttress, Cross - section.

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Figure 14. Proposed Low -level Outlet Structure and Gate, Upstream Face and Cross - section.
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72" diam main *~W
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Figure 14. Proposed Low -level Outlet Structure and Gate, Upstream Face and Cross - section.

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Ir ........................... DRAlN LAYOUT - PLAN