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Home My WebLink AboutNC0004774_Request for 401/Buffering-Comments_20161019 PAT MCCRORY Govsrnor DONALD R. VAN DEI, VAAI,T .r Secre[ni . Hater Resources EN VRONM EN TAL DV ALITY S. JAY ZIMMERMAN Director October 19, 2016 Duke Energy EC13K / P.O. Box 1006 Charlotte, NC 25201-1006 Attention_ Ross Hartfield, Environmental Specialist 2 Subject: Request for DWR 401 and Buffer Permitting Branch comments regarding the Buck Combustion Turbine Combined Cycle Wastewater Diversion Project along the Yadkin River Dear Mr. Hartfield, The Division of Water Resources (DWR) 401 and Buffer Permitting Branch received a request for comments dated September 14, 2016 regarding the Buck Combustion Turbine Combined Cycle (Buck CTCC) Wastewater Diversion Project along the Yadkin River. The request states that Duke Energy is currently planning or implementing decommissioning and closure activities with the ash basin at the subject site. The ash basin consists of three ponds identified as Cell 1, Cell 2 and Cell 3. The request proposes a temporary rerouting of wastewater from the Buck CTCC which is currently discharging into Cell 1 to Outfall 001 until a more permanent outfall is approved. The wastewater will be discharged to the Yadkin River. Please insure that the temporary and permanent outfalls are properly permitted and that they are stable and reinforced to handle any volume of wastewater that is discharged during this process. The proposal also mentions possible impacts to waters including wetland impacts. Any proposed permanent or temporary impacts to these waters may require coverage under an Isolated Waters Permit from the NC Division of Water Resources, or coverage under a 401 Water Quality Certification (WQC) if a permit is required by the US Army Corps of Engineers. The request mentions that a Nationwide 12 Permit will be utilized; however, DWR recommends that you confirm with the USACE on which 404 permit will cover the activities and impacts associated with this project. The type of 404 Permit and the amount of impacts may trigger written concurrence requirements from the NC Division of Water Resources for a 401 WQC. Also, please insure that State of North Carolina I Environmental Quality I Water Resources 1617 Mail service Center I Raleigh,North Carolina 27699-1617 919 807 6300 Buck CTCC Wastewater Diversion Project Page 2 of 2 proper construction and erosion and sedimentation control practices are utilized to prevent sedimentation or other pollutants from entering the Yadkin River. Thank you for allowing the DWR 401 and Buffer Permitting Branch to comment on your proposal. If you have any questions, please contact me at 919-807-6360 or at Karen.hiJqJginsCZDncdenr.F-ov. Sincerely, 1. Karen Higgins DWR 401 & Buffer Permitting Branch Chief CC: DWR 401 & Buffer Permitting Branch — File Copy USACE Asheville Field Office File name:2016-9-14—Duke Energy Buck Combustion Wastewater Diversion Yadkin PAT MCCRORY K, DONALD R. VAN DER VAART Water Resources ENVIRONMENTAL QUALITY S. JAY ZIMMERMAN October 18, 2016 Duke Energy EC13K/ P.O. Box 1006 Charlotte, NC 28201-1006 Attention: Ross Hartfield, Environmental Specialist 2 Subject: Request for DWR 401 and Buffer Permitting Branch comments regarding the Buck Combustion Turbine Combined Cycle Wastewater Diversion Project along the Yadkin River Dear Mr. Hartfield, The Division of Water Resources (DWR) 401 and Buffer Permitting Branch received a request for comments dated September 14, 2016 regarding the Buck Combustion Turbine Combined Cycle (Buck CTCC) Wastewater Diversion Project along the Yadkin River. The request states that Duke Energy is currently planning or implementing decommissioning and closure activities with the ash basin at the subject site. The ash basin consists of three ponds identified as Cell 1, Cell 2 and Cell 3. The request proposes a temporary rerouting of wastewater from the Buck CTCC which is currently discharging into Cell 1 to Outfall f until a more permanent outfall is approved. Once properly permitted,f the wastewater from the outfalls will be discharged to the Yadkin River. Please insure that any outfall that is approved is stable and reinforced to handle any volume of wastewater that is discharged during this process. � c000+114) The proposal also mentions possible impacts to waters including wetland impacts. Any proposed permanent or temporary impacts to these waters may require coverage under an Isolated Waters Permit from the NC Division of Water Resources, or coverage under a 401 Water Quality Certification (WQC) if a permit is required by the US Army_ orp ��gineers. The request 1.mentions that a Nationwide 12 Permit will be utilized but pl ase confirm with the USACE on which 404 permit will cover the activities and impacts associated with this project. The type of 404 Permit and the amount of impacts may trigger written concurrence requirement from the NC Division of Water Resources for a 401 WQC. Also, please insure that proper construction and State of North Carolina I Environmental Quality I Water Resources 1617 Mail service Center I Raleigh,North Carolina 27699-1617 919 807 6300 Buck CTCC Wastewater Diversion Project Page 2 of 2 erosion and sedimentation control practices are utilized to prevent sedimentation or other pollutants from entering the Yadkin River. Thank you for allowing the DWR 401 and Buffer Permitting Branch to comment on your proposal. If you have any questions, please contact me at 919-807-6360 or at Karen.higgins@ncdenr.gov. Sincerely, Karen Higgins DWR 401 & Buffer Permitting Branch Chief CC: DWR 401 & Buffer Permitting Branch—File Copy USACE Asheville Field Office File name:2016-9-14—Duke Energy Buck Combustion Wastewater Diversion—Yadkin PAT MCCRORY DONALD R. VAN DER VAART Water Resources ENVIRONMENTAL QUALITY S. JAY ZIMMERMAN October 18, 2016 Duke Energy EC13K/ P.O. Box 1006 Charlotte, NC 28201-1006 Attention: Ross Hartfield, Environmental Specialist 2 Subject: Request for DWR 401 and Buffer Permitting Branch comments regarding the Buck Combustion Turbine Combined Cycle Wastewater Diversion Project along the Yadkin River lr{es�e to t9 Dear Mr. Hartfield, The Division of Water Resources (DWR) 401 and Buffer Permitting Branch received a request for comments dated September 14, 2016 regarding the Buck Combustion Turbine Combined Cycle (Buck CTCC) Wastewater Diversion Project along the Yadkin River. The request states that Duke Energy is currently planning or implementing decommissioning and closure activities with the ash basin at the subject site. The ash basin consists of three ponds identified as Cell 1, Cell 2 and Cell 3. The request proposes a temmporar`yrerouting of wastewater from the Buck CTCC which is currently discharging into Cell 1 to).0 tfall 1 u�t til a more permanent outfall is approved. The wastewater will be discharged to the Yadkin River. Please insure that any outfall that is approved is stable and reinforced to handle any volume of wastewater that is discharged during this process. , The proposal also mentions possible impacts to waters including wetland impacts. Any proposed permanent or temporary impacts to these waters may require coverage under an Isolated Waters Permit from the NC Division of Water Resources, or coverage under a 401 Water Quality Certification (WQC) if a permit is required by the US Army Corps of Engineers. Please confirm with the USACE on which 404 permit will cover the activities and impacts associated with this project. The type of 404 Permit and the amount of impacts may trigger written concurrence requirement from the NC Division of Water Resources for a 401 WQC. Also, please insure that proper construction and erosion and sedimentation control practices are utilized to prevent sedimentation or other pollutants from entering the Yadkin River. State of North Carolina I Environmental Quality I Water Resources 1617 Mail service Center I Raleigh.North Carolina 27699-1617 919 8076300 Buck CTCC Wastewater Diversion Project Page 2 of 2 Thank you for allowing the DWR 401 and Buffer Permitting Branch to comment on your proposal. If you have any questions, please contact me at 919-807-6360 or at Karen.higgins@ncdenr.gov. Sincerely, Karen Higgins DWR 401 & Buffer Permitting Branch Chief CC: DWR 401 & Buffer Permitting Branch—File Copy USACE Asheville Field Office File name:2016-9-14_DUKE Energy Buck Combustion Turbine—Yadkin fie% DUKE EHS CCP Environmental Programs 10" ENERGY. Duke Energy 526 South Church Street Charlotte, NC 28202 Mailing Address: EC13K/P.O. Box 1006 Charlotte, NC 28201-1006 September 14, 2016 Ms. Karen Higgins North Carolina Department of Environmental Quality O Division of Water Resources Water Quality Permitting Section �OV 401& Buffer Permitting Branch 1617 Mail Service Center SSP 1 Raleigh, NC 27699-1617 4oFQ ��16 a Subject: Buck Combustion Turbine Combined Cycle ��FFFRRF Wastewater Diversion Project �RpFRMi��Fs Agency Consultation Information Package Nc Dear Ms. Higgins, Duke Energy respectfully requests your review of the attached agency consultation information package summarizing a proposed project located along the shoreline of the Yadkin River, which is managed by the Yadkin Division of Alcoa Power Generating Inc., (Yadkin) as part of the Yadkin Hydropower Project (FERC No. 2197). Yadkin requires developers of smaller projects to consult with federal and state resource agencies regarding their proposed projects. The attached information package includes: • A brief description of the proposed facilities or modifications, including maps illustrating boundaries of facilities or modifications in relation to property boundaries and the reservoir shoreline; • A brief description of the anticipated impact on the reservoir and the shoreline within 100 feet of the normal full-pond elevation of the reservoir; • A list of all required federal, state, and local permits/approvals; • A description of any state or local development restrictions that apply to the proposed facilities or modifications; • Pertinent applicant information; and • A cultural resources evaluation assessing the potential impacts to cultural resources located along the shoreline within 100 feet of the normal full-pond reservoir elevation. Please provide written comments within 30 days of receipt. Agency comments will be forwarded to Yadkin as part of the application for approval of the proposed project. If comments are not received by Duke Energy within 30 days of receipt, then Duke Energy will consider the non-response as "no objection". Yadkin will consider agency comments in evaluating and approving the project. Thank you in advance for your timely review. Should you have any questions regarding the enclosed information package, please contact me at(980) 373-6583 or ross.hartfield@duke-energy.com. Sincerely, FossHartfiffeld Environmental Specialist 2 Attachments USPS Tracking: 7013 0600 0000 6876 1827 Combustion Combined Wastewater FN Duke Energy)Buck CTCC Wastewater Diversion �� Agency Consultation Information Package Project Description A brief description of the proposed facilities or modifications, including maps illustrating boundaries of the facilities or modifications in relation to property boundaries and the reservoir shoreline. Maps should clearly indicate the location of any Yadkin-Managed Buffer or adjacent Yadkin-Managed lands. RESPONSE Duke Energy's 620-megawatt Buck Combustion Turbine Combined Cycle Plant(Buck CTCC), a natural gas-fired combustion turbine combined cycle facility located in Rowan County, North Carolina, on the Yadkin River. The Buck CTCC was constructed at the retired Buck Steam Station site and began commercial operations in 2011. The Buck CTCC site has an ash basin consisting of three ash ponds identified as Cell 1, Cell 2, and Cell 3. Duke Energy is currently planning or implementing decommissioning and closure activities associated with the ash basin. As part of this effort, all wastewater streams flowing to the ash basin must be diverted to alternate locations. Diversion of wastewater away from the ash basin will occur in phases beginning with rerouting of wastewater away from Cell 1. This agency consultation information package provides a description of proposed temporary rerouting of wastewater from the Buck CTCC wastewater sump, currently discharging into Cell 1, to Outfall 001 until a more permanent outfall location is approved. The permanent outfall may be designated as Outfall 006. An aerial view of the proposed Buck CTCC wastewater temporary rerouting from Cell 1 to Outfall 001 and then permanently to Outfall 006 is shown in Figure 1. Figure 2 shows the proposed outfall alignments in relation to the Yadkin Hydropower Project(FERC No. 2197) boundary. i Duke Energy] Buck CTCC Wastewater Diversion I1—I Agency Consultation Information Package J OUTFALL 006 JOUTFALL 001 DISCHARGE DISCHARGE ., f � � , T �• Waft UCK STE All S-T,\ri1_;N r ; `' VALVE BOX A. TRANSITION w 1 4 BUCK COMBUSTION TURBINE t COMBINED CYCLE FACILITY (CTCC) 1i .. �u (FI I t TIE IN A A .t' 'CTCC WASTEWATER LLr Figure 1. Buck CTCC Wastewater Sump Flow to Outfall 001 and Outfall 006 2 Duke Energy) Buck CTCC Wastewater Diversion �� Agency Consultation Information Package LEGEND EDD Pow*= Lwn a De E ?EkPTMMT S►T - s r poll Pc 11(W .uat .ftV: �� . x :. ._. -_ o a ' SMII�UrM1� { 1 �.�, �p � 7�UC,'ttlM rMIiAWGE ...i. .. _ . - tt I /*-Gf 4 1,4 �" ; � •- .<. t"' ..: _ q P Ix HIM R aTiQ?. .. _ •_ � _ _ _- .. AMC RANWIS y3� • .._}{^ ' _ y F*KE VANTYY"t x. < ' n. - 6'14YXI/G UWTS 7 asno wil +ram. .. «,.�',..- '/ ♦ _ *` _. _. �- «._ . ' w rs; .....<► -.. +, ._ z a' H�'r'n:". a as'Y' Ou'fiW 001 a ' C ' •." : - .. LSISMIG S.t ftma +3" < �K __ EYSFNG Stow ptAUI" PTA! I a1 �� "My" 011104 da f fiEvJk"% 6.45.1r (UAVM) - E4+'S1 - VAS@1fi EM1AtA _ STEEP 10111AM THIS SEc"M - wt %**V'D 06.107h0 #EU:;r+tY TAK + SE 'A WAT414 a" PA,EII VWW A4AW P/K A�lUIpE1Et' MAT *% NDUIEI OAL OP VIt"CAt ME WO RAVIIA 16 411EA" r,00 3S *AS _.«:M ^ ''' "'•' 4PRP ttAlA?E TEAS 719 PPC 01AAET1iA1 iiG. "M A 14- W PIR_ W IM PPE MUD GAPUS fs 310 rn -'- - .tam 3. VET,t►;µ ,NwP4fTW11 NWT AMV&ftlm Pp# s PIPE mum StA AQNPID . 1. MSTAE4A1W�t OF AbM asom PIPYIG SK4" AYME AY , - FWW IK PUKE AS "OKA" To Pow= FUN DQftm E04"M APID MNINACT" PO&VE A amm s FDDr OPVT N PMAC ALRVd CNT WIM 2"W A IS S Mr,. A OPnMk smom FDS "CIA Gram RM10. M- of soy STME A9 wP Wr S E1TStx1G UpRItGRpNp uAfIMHS OE'.KAtAgD wA"* 11 WCV MDX%f & Iir111fN NIWD To YA F FM K SIAc7N1E, MEY10iE' AS TfiMD h'OR {ISTAI2ATTU1 ff FgpcE IIAN e. EVSUK Abolk ORWI N TEIIWKoIE- HIM re" 1440 SNAU IdAa w 881,Ma "No THE e"TM oc" OF W PETMYAAEpT Ti NW FOM VAN 0* CONNTRACTDP SHWA G" W gYMETty APPRDVAI WICK PbNPA"+l of A+E %W"Mv FGOCE WAN, AM i rs 45woATER M+PgNTENANM htiaR ZONTAL GRAPHIC SCALE iYP{OI a PLw-Ot1 ITT' DUENERSY BUCK STEAM STATION a+°w.c." cTCC WASTEWATER DIVERSION 13� KE PLAN - ALCDA/FERC �e a ol..a w Aw aoe d»r K AgIP{MY AAT MTan{M .....�.. ». Oft I = COMBINED CYCLE eA:Ia-1a 1 K+x a! ,Wt. aP %1 utHl. 1!tlVlr:,a M _�M-12 Figure 2. Proposed outfall alignments in relation to the Yadkin Hydropower Project (FERC No. 2197) boundary 3 1< t 40. 'M„'a I 6UK0C-PC-P-UP.00.PL-07 I OA Duke Energy)Buck CTCC Wastewater Diversion �� Agency Consultation Information Package The proposed wastewater rerouting involves redirecting Buck CTCC wastewater effluent away from Cell 1 to Outfall 001 that directly discharges to the Yadkin River. Rerouting the Buck CTCC wastewater away from Cell 1 will help facilitate overall site dewatering efforts scheduled to start during the Fall 2016 outage. Depending on the timing Buck CTCC wastewater is planned to be rerouted to Outfall 006 three to six months later once the location is approved by the State. Wastewater generated from the Buck CTCC includes: • Cooling tower blowdown; • Treated oil/water separator effluent; • Reverse osmosis reject water; and • Treated sanitary waste effluent. Water analysis for the Buck CTCC wastewater sump is available in NPDES Permit Application #NC0004774, dated February 26, 2016. To provide for various sampling capabilities at Outfall 001 and Outfall 006, a magnetic flow meter and sampling valve will be added to the Buck CTCC wastewater sump pump discharge manifold (Figure 3). It should be noted that no other process or stormwater flows will enter the discharge pipe between the Buck CTCC wastewater sump and the outfalls. 4 Duke Energy] Buck CTCC Wastewater Diversion �� Agency Consultation Information Package Figure 3. Buck CTCC Wastewater Sump and Proposed Flow Meter and Sampling Valve Location Currently the cooling tower blowdown line discharging into the Buck CTCC wastewater sump is chlorinated (Figure 4). The cooling tower blowdown line has an existing sodium bisulfite system that will be commissioned prior to discharge of Buck CTCC wastewater to Outfall 001 or Outfall 006. The addition of sodium bisulfite reduces chlorine to chloride ion, eliminating its oxidation potential. Duke Energy] Buck CTCC Wastewater Diversion �� Agency Consultation Information Package Figure 4. Sodium Bisulfite Addition into Cooling Tower Blowdown Line Wastewater from the Buck CTCC wastewater sump is currently pumped through a manifold located close to Cell 1 into the ash basin. The manifold has been configured with additional piping and valves to allow for connection of new piping to divert flow away from the ash basin. Rerouting of the Buck CTCC wastewater piping to outfalls 001 and 006 will start at the existing manifold and will be installed underground extending to the north (i.e., downhill) toward the retired Buck Steam Station site. The existing manifold where the new piping will start is shown on Figure 5. Figure 6 shows the common underground piping for both outfalls. Figures 7, 8, and 9 are provided as a pictorial reference outlining the flow path and proposed location of Outfall 001. Figures 10, 11, and 12 are provided as a pictorial reference outlining the flow path for Outfall 006. Duke Energy] Buck CTCC Wastewater Diversion �J1� Agency Consultation Information Package VTI_ .0 1W r— ' Figure 5. Existing Manifold Located at Ash Basin Cell 1 Duke Energy] Buck CTCC Wastewater Diversion Agency Consultation Information Package Figure 6. New 14-inch High Density Polyethlene Piping Flowing North (Downhill) ui.I logo= _ 'yam ,► .1:.�7361 I. elm . . loo`- m.y �.�Ii' k .' � y �:-.. Ar: , ; .QILN'�fa .-!ice ��"@2-`r!c� \ _+.. 'c '�C �.. `-. • 'ate Duke Energy] Buck CTCC Wastewater Diversion Agency Consultation Information Package t, .w std Figure 9. Location of Existing and Proposed OutFall 001 M y �tt to t t` i � i+'�� r �,'.f . � ,,�.�'• fir, iFENCE LINE ROUT to t "Kti it �� • W.r - i p - �. Duke Energy] Buck CTCC Wastewater Diversion I �� Agency Consultation Information Package J 7. . FROM FENCE LINE ACROSS as BOAT RAMP ACCESS ROAD NEAR SA - - - _ f ..i i�.J f tom: '•�!! Figure 12. Pipe Routing from Behind Fence Line across Boat Ramp Access Road 13 Duke Energyi Buck CTCC Wastewater Diversion �� Agency Consultation Information Package r Shoreline Impact A brief description of the anticipated impact on the reservoir and the shoreline within 100 feet of the normal full-pond elevation of the reservoir. RESPONSE OUTFALL 001 Duke Energy proposes to divert and temporarily discharge wastewater originating from the Buck CTCC alongside the currently non-operational NPDES Outfall 001 instead of into the three ash ponds that compose the ash basin. This diversion of wastewater is a short-term resolution until the proposed Outfall 006 location is approved by NCDEQ. A 12-inch High Density Polyethylene piping will be installed at top of grade along the inside of Duke Energy's fence line up to the discharge point within 100 feet of the normal full-pond elevation (Figure 13). As necessary, grubbing and clearing of minor surface rubbish will take place to allow for piping to lay flat on grade and to eliminate any potential wear on piping surfaces. Approximately midway along the fence line pipe routing, the piping will cross an existing boat ramp (Figure 14). The pipe crossing in this area will be encased in a larger carbon steel pipe and then covered with approximately 12 inches of gravel to allow for transport of equipment over the pipe. 14 Duke Energy] Buck CTCC Wastewater Diversion Agency Consultation Information Package Vw �� t�.. ��*��t •I �r,.�/��ll� wYsri.r '1� ._- f .-�/. �.+�.: L•�_µ` � a�Et;. 1' � , ` \ �� , , �'• ' Typical areas along pipe routing requiring grubbing and clearing �y `�t�'` ... 1t�'. �..Ct� mod— • a t . `wry � � I'. �L. '.� •l.. + � ,.� LL I• 7'a't'� �.4 1007 4 r I « • ® � n � 1 a'` +f� � ,.� Wit+ / .' « Figure 13. Proposed Piping Location 15 Duke Energy] Buck CTCC Wastewater Diversion �1J� Agency Consultation Information Package Figure 14. Proposed Piping Location near Existing Boat Ramp 16 Duke Energy]Buck CTCC Wastewater Diversion Agency Consultation Information Package OUTFALL 006 Duke Energy proposes to discharge Buck CTCC wastewater through Outfall 006 once this location is approved. A 14-inch High Density Polyethylene piping will be installed at top of grade along the outside of Duke Energy's fence line, will cross an existing boat ramp access road and into the FERC boundary, and then will proceed north to discharge into the Yadkin River. 17 Duke Energy)Buck CTCC Wastewater Diversion 01Agency Consultation Information Package Required Permits A list of all federal, state, and local permits/approvals that will be required. RESPONSE A modification to the NPDES Permit#NC0004774 for discharges through the proposed outfalls will be required by the NCDWR. A Sediment and Erosion Control Plan will be developed for land disturbance activities and submitted to the NCDEQ's Land Quality Section for approval. Once the plan is approved the project will be authorized under a NPDES Stormwater General Permit NCG010000 for construction related activities. Outfall 001 alignment will avoid impacts to jurisdictional waters. Outfall 006 alignment will be open-cut and buried beneath a jurisdictional wetland resulting in temporary impacts of less than 0.04 acres.After the pipe is installed the wetland will be restored to its existing contours. Proposed activities will be authorized under a U.S. Army Corps of Engineers Nationwide Permit (NWP) 12 and the N.C. Division of Water Resources Water Quality Certification (WQC) No. 3884. Since impacts are minimal and activities meet the criteria of the NWP conditions and WQC requirements, no pre-construction notification or written authorization is anticipated. A review of the Federal Emergency Management Agency(FEMA) delineated 100-year flood boundary for the proposed project identified an area within the 100-year flood zone (Figure 15). The outfalls will extend into the 100-year floodplain and require review/consultation with Rowan County Water Resources Department and/or Floodplain Administrator. Therefore, the agency consultation list will include Mr. Ed Muire, Rowan County Planning Manager from the Rowan County Planning and Development Department. Section IV(Activity Permits) of the Stewardship Policy of the Yadkin Hydropower Project's Shoreline Management Plan will apply to this proposed project. Therefore, written authorization is required from Alcoa Power Generating, Inc. to perform the proposed actions. 18 Figure 15. Floodplain Map 19 Duke Energy] Buck CTCC Wastewater Diversion �♦J� Agency Consultation Information Package Duke Energyl Buck CTCC Wastewater Diversion 01Agency Consultation Information Package Shoreline Development Restrictions A description of any state or local development restrictions that apply to the proposed subdivision or facilities, such as any watershed protection, buffer zone or setback requirements and including any provisions of Yadkin's Shoreline Management Plan. RESPONSE As a FERC licensee, Alcoa Power Generating, Inc., through its Yadkin Division, operates and manages the Yadkin Hydropower Project reservoirs (e.g., High Rock, Tuckertown, Narrows, and Falls) in accordance with the terms of its license and applicable FERC rules and regulations. Generally, the Yadkin Hydropower Project boundary follows the normal full-pond elevation of the four Project reservoirs. Any land or water lying within the Project boundary is regulated by FERC and is covered under the Stewardship Policy of the Project's Shoreline Management Plan. In certain areas, Alcoa Power Generating, Inc. owns shoreline property that extends the first 100 feet of shoreline from the normal full-pond elevation, known as Yadkin Managed Lands. Under its FERC license, Alcoa Power Generating, Inc. has the authority to grant permission for certain types of use and occupancy of project lands and water and to convey certain interests in Project lands and waters. Under the Stewardship Policy(Section II General Stewardship Provisions)of the Project's Shoreline Management Plan, Alcoa Power Generating, Inc. considers installation of any permitted facilities or modifications along the shoreline to be temporary. Duke Energy proposes to utilize High Density Polyethylene piping to transport wastewater from the Buck CTCC site to proposed outfalls along the Yadkin River. This would be preferable material that would allow for easy removal and restoration of the natural shoreline. Therefore, no additional permits/approvals are needed from Alcoa Power Generating, Inc. in regards to Section II of the Stewardship Policy. Under the Stewardship Policy(Section IV Activity Permits), written authorization from Alcoa Power Generating, Inc. is required for activities such as construction, shoreline stabilization, shore alteration (excavation and fill), vegetation removal, shoreline clean-up, private irrigation systems, and vegetation plantings. Duke Energy anticipates a written permit will be needed for construction activities related to installing the High Density Polyethylene Piping to transport Buck CTCC site wastewater to the proposed outfalls along the Yadkin River. 20 Duke Energy)Buck CTCC Wastewater Diversion FN Consultation Information Package Applicant Information Name, address, and phone number of the applicant, and a brief description of the background of the applicant. RESPONSE Applicant Name and Address: Duke Energy EHS CCP Compliance and Permitting Ross Hartfield Environmental Scientist 2 526 South Church Street Charlotte, NC 28202 Phone: (980) 373-6583 Email: ross.hartfield(ab-duke-energy.com 21 Duke Energyl Buck CTCC Wastewater Diversion Agency Consultation Information Package 01 Cultural Resource Evaluation For proposed facilities located wholly or partly within High or Medium cultural resource probability zones, as delineated in Yadkin's Shoreline Management Plan (SMP, Appendix C), a cultural resource evaluation will also be required as part of the Agency Consultation Process. The cultural resource evaluation requires an assessment of potential impacts to cultural resources located along the shoreline within 100 feet of the normal full-pool reservoir elevation. RESPONSE Based on a review of the Yadkin Hydropower Project's Shoreline Management Plan maps, the proposed development would occur within a Medium Probability Area for cultural resources. Therefore, a cultural resource evaluation is necessary. CULTURAL RESOURCES ASSESSMENT A desktop review of the surrounding area based on available data resources from the National Register of Historic Places concluded no historic places are located within or near the proposed project. According to the North Carolina Historic Preservation Office, the proposed project lies within the Yadkin River Crossing Historic District Study List Boundary(Figure 16; green boundary line). A Study List Boundary is at best a suggestion of what the boundary would be if a property or district were nominated to the National Register. This boundary is, by definition, tentative or simply indicates there is a potential district within the area. The Yadkin River adjacent to the proposed development is located within the Trading Ford District Determined Eligible Boundary(Figure 16; orange boundary line). Duke Energy anticipates no federal permits are required for the proposed project; however, a copy of this Agency Consultation Information Package will be provided to the North Carolina State Historic Preservation Office for review. FLOODPLAIN ASSESSMENT A review of the FEMA Digital Flood Insurance Rate Map-delineated 100-year flood boundary identified portions of the proposed development adjacent to the Yadkin River located within the regulated 100-year flood zone (Figure 15). RIPARIAN BUFFER ASSESMENT A review of the State of North Carolina Buffer Regulations indicated that the proposed development is not located within a state-regulated buffered river basin and is not subject to state riparian buffer regulations. Based on Section 21-213 Buffer Requirements of the Rowan County Zoning Ordinance, a minimum 30-foot vegetation buffer is required for development activities along all perennial waters indicated on the most recent version of U.S. Geological Survey 1:24,000(7.5-minute) scale topographic maps. The proposed development is not subject to requirements detailed in Section 21-213 of the Rowan County Zoning Ordinance. 22 Duke Energy] Buck CTCC Wastewater Diversion Agency Consultation Information Package J Figure 16. Map of North Carolina Listings in the National Register of Historic Places near the Proposed Development