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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 E Intal Projl Boui . volley 58 ♦ Pi ��y" 1 12 e7 , 12 n+ ae 1t 59 P �' 52 $Matt 4 0 ivi00dl d WgSOn epen noe 9 .v' • 7 V�tlfe 103- 16 03-76 z 7 tier- 83 a Deka 15 6 1a.. 104 .n _ 1} Crumpler Tmd a LoW - Pi 1Vitltlflf �l xFramm G�' 1z d9 1 A : hf2n r xS�1e�j`�"1 27� 113 , hfilm- y�� �.. � oa 2 Ba1111iV- . 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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