HomeMy WebLinkAbout20091002 Ver 1_Emails_20091001RE: DWQ 09-1002 W Kerr Scott Hydro Power Project (Wilkes) Page 1 of 1
RE: DWQ 09-1002 W Kerr Scott Hydro Power Project (Wilkes)
Dennison, Laurie
Sent: Thursday, October 01, 2009 8:32 AM
To: kevindedwards@gmail.com
Kevin -
Received your correspondence and CD for Application for License for the above reference project. DWQ will
require another CD as the one supplied was cracked upon arrival.
You may also wish to contact John Dorney about the FERC licensing. He can be reached at (919) 733-1786.
Thank you,
Laurie
Laurie Dennison
401 Oversight and Express Permits Unit
Wetlands & Stormwater Branch
NCDENR - Division of Water Quality
Main Line: (919) 733-1786
Website: http://h20.enr.state.nc.us/ncwetlands
Note updated email address: laurie_.j den nison@ncden.r.,_gov
Email correspondence to and from this address may be subject to the North Carolina Public Records Law and may
be disclosed to third parties.
https://mail.nc.gov/owa/?ae=Item&t=IPM.Note&id=RgAAAACChSeOTRSCT5TN0706x... 10/1/2009
December 5, 2009
Wilkesboro
Hydroelectric
Company, LLC
Hydro Development
P.O Box 143
Mayodan, NC 27027
336 589-6138
ph@piedmonthydropower.com
RE: DWQ# 09-1002
Wilkes County
W. Kerr Scott Hydropower Project Section 401 Permit Application
Sue Homewood
North Carolina Division of Water Quality
Winston-Salem Regional Office
585 Waughtown St.
Winston-Salem, NC 27107
Ian McMillan
North Carolina Division of Water Quality
Wetlands/401 Certification Unit
1650 Mail Service Center
Raleigh, NC 27699-1650
Ms. Homewood,
!� um � L� L��ti!
J
u E C 1 1 2909
DENR • WATER QUALITY
WETLANDS AND STCRNTWATER BRANCH
Please find attached an updated Pre -construction Notification Form and several drawings that better show
how the project will interface with the existing river. These drawings show the addition of a rock and earth fill
cofferdam with a sheet pile reinforcement. Also, the drainage culvert that replaces the current culvert is also
shown in greater clarity. Please make sure that drawings that we provide showing structures of the dam and
proposed powerhouse are not available to the public.
The Yadkin River in the area where the powerhouse will discharge into the river appears to be man made
from the dam's existing discharge basin to the point where Fish Dam creek joins the river several hundred feet
downstream. The original riverbed lies approximately 100 feet north of where the river is today. Due to this,
the banks of the river where the powerhouse will discharge into the river are steep and covered in large riprap
and have no wetland characteristics. Therefore this project will not be excavating or filling any wetlands area.
However, a temporary rock and earth cofferdam will be installed along 130 feet of the riverbank to allow the
safe dewatering of the powerhouse site. The cofferdam will move the point where the river meets the bank
outwards 20 feet. The total amount of rock and earth used in this construction cofferdam will be 659 cubic
yards. The total area of uplands that will be disturbed by this project is less than 0.5 acre and the use of silt
fences and seeding will be used to minimize any erosion that might occur from entering the river. The
powerhouse will be built on uplands, and only when the plant is ready to be connected to the river will the
cofferdam be removed and the discharge channel excavated. A proper silt curtain will be used during this
excavation to minimize the sediment from entering the river. The use of filter cloth and a heavy blanket of
large riprap prior to the silt curtain being removed will protect the area excavated from erosion.
We found the meeting with you on December 2, 2009 to be very helpful in identifying issues pertaining to
construction of this project on the Yadkin River.
ectfu I ly,
r
Dean Edwards
Wilkesboro Hydroelectric Company
PO Box 143
Mayodan, NC 27027
/,
Rock faced rock
and earth fill
cofferdam
Temporary
Existing Public public use path
use path
Shoreline prior to
excavating
Public
parking lot
Existing road
Temporary public
use path
Powerhouse
Existing culverts that
drain water from
existing ditch and
will be removed
New drainage culvert to
carry water from
existing ditch
Site plan showing modification to riverbank
[ geipnc n leer
Gcnerolor 7
1 erhine 7
Jell lehc 7
cic llerl leihrd 6 lril
60 1—
Existing bank
1 on 2 slope
Sheet piling used
during powerhouse
construction
Temporary public
use path during
construction
Temporary rock
riprap faced
,20 earth and rock fill
cofferdam
240
I.
60 Surface of river
!l at 963'
Bottom of completed Existing bottom
discharge channel of Yadkin River
with large riprap and at -955'
filter cloth after
excavation
Side elevation showing modifications to riverbank
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1a t0 ti t0 16 Sherti8a Fmd • WILKESE30RO HYCROELECTRIO COMPANY LLC
o� u1
10 a;;a'rVC;I *a r2 ertdl -
Maiden W, KERR SCOTT HYDROPOWER PROJECT
Seca twill�'�!
VICINITY MAP
rigure Al - Project Location and Vicinity Map
Project
Boundary
Figure A2 — Project Boundary
Water Quality Channel
and Trashrack
\Intake
Tower
Existing Concrete
Discharge Conduit
12.25' Dia,
Earth and Rock Fill
\Impermeable Core
,—Earth and Rock Fill
Stilling Basin
L—Seepoge Conduit Gate
Collars (4) at end of Conduit
Steel Liner
Extends 580' inside Conduit
Wilkesboro Hydroelectric Company, LLC
W. K Scott Dam
Discharge Conduit Section View
rlgure H4- rroject urawing — bide view
Trail Stilling •�
basin
i
Howell- ,# •x / ``i� Parking
Bunger type �•�
Discharge Substation
r �
conduit gate
Power house
Discharge
• sr
conduit
Y 4q /•
A h \
A /
h�
( i
` •"• 252'-0.00"
1001-0.00" 150'-0.00" `� \
Figure A5 — Project Drawing — Project Boundary
Fishing
pier
Roof Deck 1102.5' MSL
Existing
Emergency Gate
D
O
1033' Deck
II II II II II II II II II II II II III II II II IiI II 1111111 1111111111111111111
111111111111111111111111 III II II iilll Trashrack rcrcrcrc «rcrcrcrcrc««rcr
1030' Normal
111111111111111111111111 111111111111
111111111111111111111111111111111111 2.5" Spacing
Pool
111111111111111111111111 111111111111 111111111 II11111111111111111
II1111111111111111111111 Iil 111111111 II 1111111 1111111111111111111
23'-0" ii 11 11 11 11 11 11 11 11 11 11 li 111 11 11 11 111
rcrcrcrc rcrcrcrcrc«««rcf
unnnnnuuuulln nluullul unuul nnnuununul
II II11111111111111111111111111111111 Flower 111111111 1111111111111111111
unulnuunnnnrn unnuull rcrcrcrc rcrclrrcrcrcrrrc«r
wnuuunnnrnun unnwlll nunul uuuuuuuuul
°°II111111111111111111111111111111 rc««« rf ffrcrcrcrcrc««r
ii 1111111111111111111111111111111111 II 1111111 II11111111111111111
Il II1111111111111111 ii it 111111111111 111111111 II11111111111111111
II II II II II II II II II II II II III II II II 111 «rcrcrc ««rc«rcrcrcrcrcr
II II II111111111111111111111111111111 111111111 II II II II II II II II III
111111111111II II II ii II II 1111111 ii III rcrcrcrc rcrcrcrcrcrcrcrcrcr�
Flo w
l
Flo w
Intake Inert
23-$^ ❑❑ New Intake
El F-1 _ Grate
❑F-1 Flower
=FJH
465' Floor
New Intake Slide Gates (shown closed
Existing Intake Grate---//
Wilkesboro Hydroelectric
Company LLC
W.K. Scott Dam
Intake Tower Modifications
A9 Red multi level intake gate in upper position. Water withdrawn from —10'
down to —30'.
A10 Red multi level intake gate in lower position. Bottom intake gate open. Bottom
trash rack in lower position. Water can flow from all levels. 5
A11 Red multi level intake gate in lower position. Bottom intake gate
open. Bottom trash rack in upper position. Flood flows can pass without
restriction of trash racks.
OF W A rFR
0 QG
P
Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.3 Dec 10 2008
Page 1 of 14
PCN Form — Version 1.3 December 10, 2008 Version
Pre -Construction Notification PCN Form
A. Applicant Information
1.
Processing
1 a.
Type(s) of approval sought from the
Corps:
®Section 404 Permit E] Section 10 Permit
1 b.
Specify Nationwide Permit (NWP) number: NW -17 or General Permit (GP) number:
1c.
Has the NWP or GP number been verified by the Corps?
❑ Yes
® 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
because written approval is not required?
For the record only for DWQ 401
Certification:
❑ Yes ® No
For the record only for Corps Permit:
❑ Yes ® No
1f.
Is payment into a mitigation bank or in -lieu fee program proposed for mitigation
of impacts? If so, attach the acceptance letter from mitigation bank or in -lieu
fee program.
El Yes
®No
1 g.
Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below.
❑ Yes
® No
1 h.
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes
❑ No
2.
Project Information
2a.
Name of project:
W. Kerr Scott Hydropower Project
2b.
County:
Wilkes
2c.
Nearest municipality / town:
Wilkesboro
2d.
Subdivision name:
N/A
2e.
NCDOT only, T.I.P. or state
project no:
N/A
3.
Owner Information
3a.
Name(s) on Recorded Deed:
United States of America
3b.
Deed Book and Page No.
Parcel ID 1101130
3c.
Responsible Party (for LLC if
applicable):
Army Corps of Engineers
3d.
Street address:
69 Darlington Ave
3e.
City, state, zip:
Wilmington, NC 28403
3f.
Telephone no.:
910-251-4625
3g.
Fax no.:
3h.
Email address:
Page 1 of 14
PCN Form — Version 1.3 December 10, 2008 Version
4.
Applicant Information (if different from owner)
4a.
Applicant is:
❑ Agent ❑ Other, specify:
4b.
Name:
Kevin Edwards
4c.
Business name
(if applicable):
Wilkesboro Hydropower, LLC
4d.
Street address:
P.O. Box 143
4e.
City, state, zip:
Mayodan, NC 27027
4f.
Telephone no.:
336 589-6138
4g.
Fax no.:
N/A
4h.
Email address:
kevindedwards@gmail.com
5.
Agent/Consultant Information (if applicable)
5a.
Name:
N/A
5b.
Business name
(if applicable):
5c.
Street address:
5d.
City, state, zip:
5e.
Telephone no.:
5f.
Fax no.:
5g.
Email address:
Page 2 of 14
PCN Form — Version 1.3 December 10, 2008 Version
B.
Project Information and Prior Project History
1.
Property Identification
1a.
Property identification no. (tax PIN or parcel ID):
1101130
1 b.
Site coordinates (in decimal degrees):
Latitude: 36.135153 Longitude: - 81.22426
(DD.DDDDDD) (-DD.DDDDDD)
1 c.
Property size:
3.5 acres
2.
Surface Waters
2a.
Name of nearest body of water (stream, river, etc.) to
proposed project:
Yadkin River
2b.
Water Quality Classification of nearest receiving water:
WS IV
2c.
River basin:
Pee Dee River
Page 3 of 14
PCN Form — Version 1.3 December 10, 2008 Version
3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
The project area is in the foothills of the Blue Ridge Mountains. The topography of the area is generally hilly, with hills on
both sides of the river and the dam being the most dominant features in the immediate area. Along the river there are
many different types of indigenous trees, such as oak and pine. The area downstream from the site has been developed
into an industrial park and farther downstream is the town of Wilkesboro. There are no wetlands in the vicinity of the
project. The banks of the river rise steeply from the water surface for 7-10 feet as this portion of the river down to where
Fish Dam Creek joins the river was excavated from the right bank of the river during construction of the dam. The
vegetative cover of the site consists of native grasses and weeds. No other plant life will be disturbed by this project.
The land use in the vicinity of the project is mainly recreational, although the dams main purpose is for flood control and
water storage. The project will use the existing W. Kerr Scott Dam, which was built in 1962. The dam has two gates in
the intake tower that regulate flow through the discharge conduit into the Yadkin River below the project and thereby
regulate water levels in the impoundment. The dam is an earth and rockfill dam. The top width of the dam is 28 feet at
elevation 1107.5 feet msl, 148 feet above the riverbed elevation. The length is 1740 feet along the crest. A heavy rock
blanket is provided on the upstream slope. The total volume of earth and rock in the dam is more than two million cubic
yards. Upstream slopes are 1 on 3 in rock and 1 on 2.3 in earth. The downstream slope is 1 on 3. A service road 22 feet
wide crosses the dam.
There currently exists two culverts that carry water through an existing bridge and discharge the water approxmatly 15
feet away from and two feet above the normal shoreline of the river. The proposed project will be built where these
existing culverts are and therefore a new culvert will be installed on the west end of the building that will pick up this water
from the same location that the existing culverts are and transport the water to the river into water that is over 8 feet deep.
The invert of the discharge end of the new culvert will be two feet above normal river elevation.
A temporary earth and rockfill cofferdam will be used to keep the river water from the powerhouse excavation. A siltation
curtain will be used during the installation and removal of the cofferdam to prevent silt to enter the river. A filter cloth and
riprap face will be used on the cofferdam to prevent erosion. The total volume of material used in the cofferdam will be
569 cubic yards. Sheet piling will be used to reinforce this cofferdam where needed.
3b. List the total estimated acreage of all existing wetlands on the property:
0.0
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
220' included in property to be leased from the corps, both sides of river.
3d. Explain the purpose of the proposed project:
Wilkesboro Hydroelectric Company, LLC, (WHC) proposes to install electrical generation at the existing W. Kerr Scott
Dam, which passes the flow of the Yadkin River through its outlet structure near Wilkesboro, North Carolina. The project
will generate "green energy" for up to 4,000 homes and use existing facilities to minimize or eliminate additional
environmental impacts. The project will make use of the existing W. Kerr Scott Dam intake tower and discharge conduit
through the dam. The dam is presently and will continue to be owned by the Federal Government with the needed land
for the project to be leased from the Federal Government. Proposed project facilities and components include an intake
structure with trashrack; a new powerhouse with two turbine/generators; lining 580 feet of the existing discharge conduit
with an 11 foot diameter steel liner; penstock; discharge channel; sub -station; and a re-conductored existing transmission
line. The project will use "run -of -the -river" operations or as otherwise directed by the COE.
Page 4 of 14
PCN Form — Version 1.3 December 10, 2008 Version
3e. Describe the overall project in detail, including the type of equipment to be used:
Description of the project and the proposed mode of operation:
The powerhouse will be located below the dam on the south side of the existing discharge stilling basin. The powerhouse
will be 80 feet long by 30 feet wide and 20 feet high above ground level. The two 8' penstocks will carry the water flow
into each turbine's pressure case. Both turbines will be of the typical vertical shaft design with water passing through
wicket gates, and then exiting the runner from the bottom. After the water passes through each turbine it will enter a draft
tube, which will then carry the decelerated water back into the river. Both draft tubes will be equipped with air injection
rings designed to improve the dissolved oxygen levels downstream from the dam when needed to assure that the
discharged water meets North Carolina State standards for dissolved oxygen. A public information kiosk will be attached
to the side of the powerhouse that will describe the operation of the project. Efforts will be made to make the powerhouse
aesthetically pleasing and to minimize visual impacts. There are no plans for future turbines/generators.
There will be no need for potable water or sewer for this project.
The project proposes to maintain the same flow rate of water out of the reservoir following the COE's operation plan.
Currently when lake elevation is above 1030' flows are made to keep the lake at 1030' unless there is the need to store
water to prevent downstream flooding. When the lake is below 1030' the following low flow operation plan is used:
1029.0' msl & above - 400 cfs, 1028.00 - 1028.99 - 350 cfs, 1027.00'- 1027.99'- 300 cfs, 1026.00'- 1026.99'- 250
cfs, 1024.00' - 1025.99' - 200 cfs, 1023.00' - 1023.99' - 150 cfs, 1000.00' - 1022.99' - 125 cfs
In response to severe drought conditions the Corps has on occasion temporarily reduced releases below 125 cfs.
Otherwise, minimum discharge from Scott should not be less than 125 cfs at any time, except during inspection and
maintenance periods. Recently, while experiencing drought conditions, the COE has released 125 cfs whenever the lake
elevation is below 1030'. An operator will live within 15 minutes' travel time and when not at the plant the operator will be
on call. The turbines will pass the amount of water determined by the U.S. Army Corps of Engineers. There will be no
change in operation during low (adverse), mean or high flow year.
Each penstock as it enters the powerhouse will also have a spill gate, which can flow up to 400 cfs, which will allow water
to bypass the turbine and discharge directly into the powerhouse draft tube. Each spill gate will open when its respective
turbine shuts down to maintain a constant flow into the river. When the turbine starts back up the spill gate will slowly
close again, maintaining constant flow. If more than the capacity of the two turbines, 800 cfs, needs to be released, a
fixed cone valve in the conduit gate will also be used to pass flows from 800 cfs to 2000 cfs. When flows above 2000 cfs
need to be released the turbines will be shut down, the service gates closed, the conduit gate opened, the intake slide
gates opened and then the COE's existing service gates will control the flow of water.
A trashrack with a bottom elevation of 1000 feet MSL up to 1033 feet MSL will be attached to the top of the water quality
channel to remove trash and to prevent the entrainment or impingement of fish. Maximum average approach velocity to
the trashrack will be 1.5 feet per second at a point 6 inches in front of the trashrack. The maximum approach velocity at
any one point will be 2 feet per second at a point 6 inches in front of the trashrack. The spacing between trashrack bars
will be 2.5 inches or less. The trashrack will have an area in excess of 1400 square feet to allow flows up to 2000 cfs to
pass while the project is generating. The intake water quality structure will have a multi-level intake gate system that will
control the elevation from which water is withdrawn.
The existing 749 foot long reinforced concrete water conduit, which is 12.25 feet in diameter, will be lined for the last 580
feet to the outlet at the stilling basin with an 11 foot diameter % inch thick steel liner to prevent water under pressure from
passing through the walls of the conduit into the earth fill dam itself. The conduit liner will continue on past the penstock
bifurcation to where a conduit gate will divert the flows to the powerhouse when the turbines are operating. The conduit
gate will be located at the end of the conduit liner and at the beginning of the stilling basin and will be used only in the
fully open or fully closed position; the gate itself will not be used for throttling flow. There will be a Howell-Bunger ring -jet
type fixed cone valve installed in this conduit gate that will control total project flows between 800 cfs and 2000 cfs. When
the conduit gate is open the intake tower service gates will control the flow of water and there will be no generation.
The water as it exits the draft tube will enter a discharge channel that will be 80 feet wide and 30 feet long, curving back
until it joins the river at the downstream end of the stilling basin. Water levels and flow rates in the river below the stilling
basin will remain the same as they are now. For the first 20 feet from the powerhouse the tailrace wing walls will be of
concrete. For the remainder the walls will be lined with large riprap over filter cloth to dissipate any wave action and
eliminate erosion.
An area next to the powerhouse will be used for the substation.
The project's 12.470 kV volt transmission line will begin at the project's substation and go underground to the closest
existing utility pole approximately one hundred feet to the south of the powerhouse. The existing 12.470 kV three-phase
line into the site runs east along the access road 3600 feet to a Duke Energy substation. This line into the site may have
to be reconductored to carry the output of the plant. As this existing line runs along a road, no trees will need to be
removed and there will be minimal disturbance to the environment. This power line uses standard wood poles.
Page 5 of 14
PCN Form — Version 1.3 December 10, 2008 Version
4.
Jurisdictional Determinations
4a.
Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
El Yes El No ®Unknown
project (including all prior phases) in the past?
Comments:
4b.
If the Corps made the jurisdictional determination, what type
El Preliminary ❑Final
of determination was made?
4c.
If yes, who delineated the jurisdictional areas?
Agency/Consultant Company:
Name (if known):
Other:
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
❑ Yes ® No ❑ Unknown
this project (including all prior phases) in the past?
5b.
If yes, explain in detail according to "help file" instructions.
6.
Future Project Plans
6a.
Is this a phased project?
❑ Yes ® No
6b.
If yes, explain.
Page 6 of 14
PCN Form — Version 1.3 December 10, 2008 Version
C. Proposed Impacts Inventory
1. Impacts Summary
1a. Which sections were completed below for your project (check all that apply):
❑ Wetlands ® Streams - tributaries ❑ Buffers
® Open Waters ❑ Pond Construction
Page 7 of 14
PCN Form — Version 1.3 December 10, 2008 Version
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a.
2b.
2c.
2d.
2e.
2f.
Wetland impact
Type of jurisdiction
number —
Type of impact
Type of wetland
Forested
(Corps - 404, 10
Area of impact
Permanent (P) or
(if known)
DWQ — non -404, other)
(acres)
Temporary T
W1 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W2 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W3 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W4 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W5 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W6 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
2g. Total wetland impacts
2h. Comments:
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a.
3b.
3c.
3d.
3e.
3f.
3g.
Stream impact
Type of impact
Stream name
Perennial
Type of jurisdiction
Average
Impact
number -
(PER) or
(Corps - 404, 10
stream
length
Permanent (P) or
intermittent
DWQ — non -404,
width
(linear
Temporary (T)
(INT)?
other)
(feet)
feet)
S1 ®P [-IT
Connection. of
plant discharge to
Yadkin River
❑ PER
® Corps
100'
80'
the river
®INT
®DWQ
Construction of
S2 ❑ P ® T
hydropower plant
Yadkin River
❑ PER
® Corps
100'
80'
on south bank of
® INT
® DWQ
river
Excavation of
S3 ❑ P ®T
discharge channel
Yadkin River
❑ PER
® Corps
100'
80'
between power
® INT
® DWQ
house and river
S4 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
S5 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
S6 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
3h. Total stream and tributary impacts
3i. Comments: The impacts to the river consist of possible sediments entering the river during construction of the powerhouse
on the south bank of the river. The powerhouse will be constructed in the dry with water pumped from the excavation being
sent to a settling basin before it returns to the river. Proper used of sediment fences and seeding disturbed areas will be used.
The use of a sediment curtain will be used when the temporary cofferdam is built and when the discharge channel is
excavated between the powerhouse and the river to prevent sediment from entering the river.
Page 8 of 14
PCN Form — Version 1.3 December 10, 2008 Version
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
Temporary T
W. Kerr Scott
Installation of the multilevel
01 ®P ❑ T
water quality intake to the exiting
Reservoir
.1
reservoir
intake tower
02 ❑P❑T
03 ❑P❑T
04 ❑P❑T
4f. Total open water impacts
4g. Comments: This will consist of installing a prefabricated steel intake structure to the face of the existing intake tower so
that the project can draw water from nearer the surface of the resevoir where the D/O levels are consistantly above state
standards. The intake structure will also have the intake racks attached to remove debris and keep large fish from being
entrained in the turbines. There will be minimal construction work done on site, mainly the drilling of several holes in the
concrete intake structure to attach the steel intake structure. Efforts will be made to eliminate as much as possible the dust
and debris from the drilling and other instalation activities from entering the waters of the reservoir. This intake structure will
sit on an existing concrete floor at the base of the existing intake tower.
5. Pond or Lake Construction
If pond or lake construction proposed, then complete the chart below.
5a.
5b.
5c.
5d.
5e.
Wetland Impacts (acres)
Stream Impacts (feet)
Upland
Pond ID
Proposed use or purpose
(acres)
number
of pond
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
P1
P2
5f. Total
5g. Comments:
5h. Is a dam high hazard permit required?
❑ Yes ❑ No If yes, permit ID no:
5i. Expected pond surface area (acres).-
acres):5j.
5j.Size of pond watershed (acres):
5k. Method of construction:
Page 9 of 14
PCN Form — Version 1.3 December 10, 2008 Version
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
number —
Reason
Buffer
Zone 1 impact
Zone 2 impact
Permanent (P) or
for
Stream name
mitigation
(square feet)
(square feet)
Temporary T
impact
required.
61 ❑P❑T
El Yes
❑ No
B2 ❑ P ❑ T
❑ Yes
❑ No
B3 ❑P❑T
EI Yes
❑ No
6h. Total buffer impacts
6i. Comments:
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
❑ Yes ❑ No
impacts to Waters of the U.S. or Waters of the State?
2b. If yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
❑ Mitigation bank
2c. If yes, which mitigation option will be used for this
El Payment to in -lieu fee program
project?
❑ Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank:
3b. Credits Purchased (attach receipt and letter)
Type
Quantity
Page 10 of 14
PCN Form — Version 1.3 December 10, 2008 Version
3c. Comments:
4. Complete if Making a Payment to In -lieu Fee Program
4a. Approval letter from in -lieu fee program is attached.
❑ Yes
4b. Stream mitigation requested:
linear feet
4c. If using stream mitigation, stream temperature:
❑ warm ❑ cool ❑cold
4d. Buffer mitigation requested (DWQ only):
square feet
4e. Riparian wetland mitigation requested:
acres
4f. Non -riparian wetland mitigation requested:
acres
4g. Coastal (tidal) wetland mitigation requested:
acres
4h. Comments:
5. Complete if Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires
buffer mitigation?
❑ Yes ❑ No
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.
Zone
6c.
Reason for impact
6d.
Total impact
(square feet)
Multiplier
6e.
Required mitigation
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
1.5
6f. Total buffer mitigation required:
6g. 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).
6h. Comments:
Page 11 of 14
PCN Form — Version 1.3 December 10, 2008 Version
E.
Stormwater Management and Diffuse Flow Plan (required by DWQ)
1.
Diffuse Flow Plan
1a.
Does the project include or is it adjacent to protected riparian buffers identified
El Yes No
within one of the NC Riparian Buffer Protection Rules?
1 b.
If yes, then is a diffuse flow plan included? If no, explain why.
Comments:
EI Yes El No
2.
Stormwater Management Plan
2a.
What is the overall percent imperviousness of this project?
1.67%
2b.
Does this project require a Stormwater Management Plan?
❑ Yes ® No
2c.
If this project DOES NOT require a Stormwater Management Plan, explain why: The
project has an inpervious
less than 3000 square feet and construction will disturb less than 1/2 acre of land.
area of
2d.
If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
❑ Certified Local Government
2e.
Who will be responsible for the review of the Stormwater Management Plan?
❑ DWQ Stormwater Program
❑ DWQ 401 Unit
3.
Certified Local Government Stormwater Review
3a.
In which local government's jurisdiction is this project?
❑ Phase II
3b.
Which of the following locally-implemented stormwater management programs
❑ NSW
apply (check all that apply):
❑ USMP
❑ Water Supply Watershed
❑ Other:
3c.
Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ❑ No
attached?
4.
DWQ Stormwater Program Review
❑ Coastal counties
4a.
Which of the following state-implemented stormwater management programs apply
El HQW
EJ ORW
(check all that apply):
❑ Session Law 2006-246
❑ Other:
4b.
Has the approved Stormwater Management Plan with proof of approval been
attached?
❑ Yes ❑ No
5. DWQ 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
Page 12 of 14
PCN Form — Version 1.3 December 10, 2008 Version
F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1a. 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
letter.)
❑ Yes ❑ No
Comments:
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):
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in
El Yes ®No
additional development, which could impact nearby downstream water quality?
3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
4. Sewage Disposal (DWQ 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.
There will be no wastewater generated by this project when it is in operation. Portable toilets will be provided during
constuction.
Page 13 of 14
PCN Form — Version 1.3 December 10, 2008 Version
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or
❑ Yes ® No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act
® Yes ❑ No
impacts?
5c. If yes, indicate the USFWS Field Office you have contacted.
El Raleigh
® Asheville
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
WHC hired fish & mussel study
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?
WHC hired fish & mussel study
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
El Yes ®No
status (e.g., National Historic Trust 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?
Internet search and letters to agencies
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain?
® Yes ❑ No
8b. If yes, explain how project meets FEMA requirements: In order to operate powerhouse has to be in the flood plain. It is
designed to withstand the 100 year flood without damage.
8c. What source(s) did you use to make the floodplain determination? FEMA map
Kevin Edwards.
9/15/2009
Applicant/Agent's Printed Name
Date
Applicant/Agent's Signature
(Agent's signature is valid only if an authorization letter from the applicant
is provided.)
Page 14 of 14
PCN Form — Version 1.3 December 10, 2008 Version