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HomeMy WebLinkAbout20080067 Ver 4_More Info Received_20120112WITHERS &' RAVENEL ENGINEERS I PLANNERS I SURVEYORS 1410 COMMONWEALTH DRIVE SUITE io1 WILMINGTON NORTH CAROLINA 28403 (910) 256 9277 FAX (910) 256 2584 TO NC Division of Water Quality — 401 Wetlands Unit 512 N Salisbury Street Stn Floor Raleigh NC 276o4 WE ARE SENDING YOU ❑ Shop Drawings ❑ Copy of Letter LETTET, a�uF Y AN MST QL DATE 1/9/12 6 02100349 00 ATTENTION Ms Karen Higgins PHONE # RE Alston Pond — On Hold Letter Response DWQ Project #o8 oo67 Ver 02100349 00 Alston Pond On Hold Letter Response 1 1/9/12 0210034900 ® Attached ❑ Under separate cover via ❑ Prints ❑ Plans ❑ Samples ❑ Change order ❑ Diskette ❑ the following items ❑ Specifications COPIES DATE NO DESCRIPTION 1/9/12 02100349 00 Alston Pond On Hold Letter Response 1 1/9/12 0210034900 CD of On Hold Response THESE ARE TRANSMITTED as checked below ® For approval ❑ Approved as submitted ❑ Resubmit copies for approval ❑ For your use ❑ Approved as noted ❑ Submit copies for distribution ❑ As requested ❑ Returned for corrections ❑ Return corrected prints ❑ For review and comment ❑ ❑ FOR BIDS DUE 20 ❑ PRINTS RETURNED AFTER LOAN TO US REMARKS Karen — Please note that I have provided a copy of the enclosed response directly to Lauren Witherspoon _ COPY TO Fi le SIGNED Troy Beasley If enclosures are not as noted kindly notify us at once urryK WATER QUALITY KS DS AND STORMWATER BRANCH WITHERS &- RAVENEL ENGINEERS 1 PLANNERS I SURVEYORS January 9 2012 NC Division of Water Quality Attn Ms Lauren Witherspoon C/O Ms Karen Higgins 1650 Mail Service Center V J� Raleigh NC 27699 1650 SAN ® Re Alston Pond Subdivision N,� DWQ # 08 006 DWQ On Hold Letter dated January 6 2012 `"NDSANDST pR Dq(JTi 7 4 ERB%Ctj Dear Ms Witherspoon This letter is in response to the On Hold Letter issued by NC DWQ on January 6 2012 Please see below for responses to the items addressed in your letter 1) Page 2 of the cover letterand Plan Sheet #i propose 23 If of temporary stream impacts However the PCN apphcation proposes 27 if of temporary stream impacts Please explain the discrepancy and revise and resubmit accurate and consistentmformation The 27 if of temporary stream impacts documented Section C 3 was a typographical error The proposed temporary stream impacts are 23 if and Section C 3 has been revised in the attached PCN 2) Page 2 of the cover letter and Plan Sheet #1 propose 24 63o sq ft of Zone i buffer impacts However the PCN application proposed 34 63o sq ft ofZone i bufferimpacts Please explain the discrepancy and revise and resubmit accurate and consistent Information Please note that per DWQ s request the design of the culvert for the Hilltop Needmore Road extension has been revised As a result of the revision the new buffer impacts for this crossing consist of 18 839 sq ft of permanent impacts to Zone 1 and 9 242 sq ft of permanent impacts to Zone 2 The revised PCN is attached to this letter 3) Section C 61 is not an accurate statement Please revise and resubmit Page 7 of 12 of the PCN application with more accurate Information Section C 61 of the PCN has been revised to Include the following statement Because buffer impacts for the northern road crossing (Sheet B) are less than 1/3 of an acre and grading within zone 2 sewer lines less than 40 if and stormwater conveyances are considered an allowable uses the applicant is not proposing buffer mitigation for these buffer impacts Since buffer impacts for the Hilltop Needmore Road Extension (Sheet A) are greater than 1/3 acre buffer mitigation will be required and is proposed as documented in Section C 3b & 6f The revised PCN and revised Impact Plans are attached to this letter 4) This office does not believe that the permanent impacts to the stream (Impact #3) as depicted on SheetA were quantified correctly The two stream segments that seem to be incorrect are directly adjacent to the termini of the proposed impact where the existing stream is within the area of the proposed reconnection Please explain why these segments would not be considered a pennanent impact iii MacKenan Drive I Cary NC 275111 tel 919 469 3340 I fax 919 467 6008 I www withersravenel com 1410 Commonwealth Drive I Suite 1o1 I Wilmington NC 28403 I tel 910 256 9277 I fax 910 256 2584 416 D Gallimore Dairy Road I Greensboro NC 27409 1 tel 336 993 5504 I fax 919 4676008 N C Engineering Board No C o832 WITHERS &- RAVENEL ENGINEERS I PLANNERS I SURVEYORS Please note that the culvert design has been revised per your request to use a junction box and culvert extension to connect the stream into the culvert beneath the Hilltop Needmore Road crossing Due to site and design constraints the downstream end of the culvert could not be designed to discharge into the northern terminus of the section of stream below the road crossing Specifically the culvert was installed per the original design which was authorized by the previously issued 401 WQC (DWQ Project #o8 oo67 Ver 3) In order to discharge into the northern terminus of the stream below Hilltop Needmore Road the discharge channel would have to run along the toe of slope of the road fill This would result in the a severe go* angle in the channel as it exists the culvert which would increase the chances of significant erosion or even failure during heavy rain events Also this would result in a perpendicular connection to the stream Per item #5 of the On Hold letter NC DWQ believes that perpendicular connections could have adverse affects on the stream channel Therefore there is not an effective design alternative to the proposed design The proposed design will have a greater angle of connection to the stream resulting in a more gradual transition from the culvert to the stream and avoiding adverse impacts to the stream 5) Please explain how additional impacts to the buffer are not warranted at the locations where np rap on the stream bank is proposed at both ends of the proposed stream connection Will a contractor be able to place np rap on the stream bank at these locations without impacting additional bufferbeyond the footpnnt of the np rap The stream in question is relatively narrow ( ±5 in width) Therefore the contractor will be able to place the proposed rip rap on the western bank of the stream by accessing the stream from the eastern side within the proposed impact area and reach across the stream with the construction equipment (i a front end loader excavator etc) for placement of the rip rap Final placement of the rip rap will be completed by hand to avoid disturbance of the stream bed A note has been added to the plans to notify the contractor of the construction methods for the proposed rip rap Therefore there will be no additional buffer impacts to the western stream bank will occur from the placement of rip rap on the western bank of the stream 6) Please explain how the neargoI tum and the perpendicular reconnection from the proposed pipe to the stream at the termini of the proposed impact will not have adverse affects on the stream channel Please provide np rap specifications for the termini of the proposed pipe Please note that the culvert design has been revised per your request to use a junction box and culvert extension to connect the stream into the culvert beneath the Hilltop Needmore Road crossing The proposed design has alleviated the 90 and perpendicular connections to the stream and provides a greater angle of the connections The revised impact plans along with the revised PCN are attached to this letter 7) Item E(2d) of the PCN form for this project states "The Stormwater Management Plan has been provided as an Appendix " However the stormwatermanagementplan was notprovided Please provide a complete stormwater management plan including the completed BMP Supplement Form for each proposed BMP as well as all of the required items listed m the form Failure to provide a complete stormwater management plan in the next submittal will result in a return of this application The stormwater management plan for this project was approved under the previously issued 401 WQC for the Alston Pond project (DWQ Project #o8 oo67 Ver 3) The revisions to the Hilltop Needmore Road crossing did not result in a modification to the previously approved stormwater management ill MacKenan Drive I Cary NC 275111 tel 919 469 3340 1 fax 919 467 6008 I www withersravenel com 1410 Commonwealth Drive ( Suite 1o1 I Wilmington NC 28403 1 tel 910 256 9277 1 fax 910 256 2584 416 D Gallimore Dairy Road I Greensboro NC 27409 1 tel 336 993 5504 1 fax 919 467 6008 N C Engineering Board No C 0832 WITHERS &' RAVENEL ENGINEERS I PLANNERS I SURVEYORS plan Therefore re submittal of the stormwater management plan is not necessary Section E 2d has been revised in the attached PCN to state The stormwater management plan for this project was approved under the previously issued 401 WQC for the Alston Pond project (DWQ Project # 08 0067 Ver 3) The revisions to the Hilltop Needmore Road crossing did not result in a modification to the previously approved stormwater management plan A copy of the revised PCN is attached to this letter Additional Information Per DWQ s request the culvert design has been revised to use a junction box and culvert extension to connect the stream to the culvert beneath the Hilltop Needmore Road crossing The modification of the culvert design has resulted in revisions to the proposed wetland and buffer impacts The following Impact Table documents the revised impacts as well as the cumulative impacts Alston Pond Revised Impact Table Sheet Impact # Permanent Perennial Stream Impacts Temporary Intermittent Stream Impacts Permanent Zone i Buffer Impacts Permanent Zone 2 Buffer Permanent Wetland Impacts Temporary Wetland Impacts #1 —Impacts 9 242 sf (Revised) #1A o 015 ac (Revised) A #2 18 839 sf (Revised) #3 2971f (Revised) #4 456 sf #5 1 191 sf #6 3 707 sf B #7 2 503 sf #8 0 005 ac C #9 o oil ac #10 4 665 sf D #11 o o14 ac #12 o oo3 ac #13 426 sf #14 1485 sf #15 23 if E #16 668 sf #17 668 sf #18 285 sf #19 61 sf F #20 2 553 sf Totals 297 if 23 if 23 344 sf 23 405 sf o 034 ac o o14 ac 111 MacKenan Drive I Cary NC 275111 tel 919 469 3340 1 fax 919 467 6008 I www withersravenel com 1410 Commonwealth Drive I Suite 101 I Wilmington NC 28403 1 tel 910 256 9277 1 fax 910 256 2584 416 D Gallimore Dairy Road I Greensboro NC 27409 I tel 336 993 5504 I fax 919 467 6008 N C Engineering Board No C 0832 WITHERS & RAVENEL ENGINEERS I PLANNERS I SURVEYORS As a result of the modification of the culvert design the current Permit Modification Request will result In the approval of 297 if of permanent stream impacts 27 if of temporary stream impacts o 034 acres of permanent wetland impacts o 014 acres of temporary wetland impacts 23 344 sq ft of permanent Zone 1 buffer impacts and 23 405 sq ft of permanent Zone 2 buffer Impacts Please feel free to contact me if you have any questions or require additional Information to complete your review of the application Sincerely Troy Beasley Environmental Scientist WITHERS & RAVENEL INC Attachments — 1) Revised PCN Form 2) Revised Overall Site Plan with Impacts 3) Revised Impact Sheet A ill MacKenan Drive I Cary NC 275111 tel 919 469 3340 I fax 919 467 6008 I www withersravenel com 1410 Commonwealth Drive I Suite 1o1 I Wilmington NC 28403 1 tel 910 256 9277 1 fax 910 256 2584 416 D Gallimore Dairy Road I Greensboro NC 27409 I tel 336 993 5504 I fax 919 467 6008 N C Engineering Board No C 0832 O�O� W ATF9OG O < Office Use Only Corps action ID no DWQ project no Form Version 1 3 Dec 10 2008 Page 1 of 12 PCN Form — Version 1 3 December 10 2008 Version Pre - Construction Notification PCN Form A Applicant Information 1 Processing la Type(s) of approval sought from the Corps ®Section 404 Permit El Section 10 Permit lb Specify Nationwide Permit (NWP) number NWP 29 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 [:1401 Water Quality Certification — Express ® Riparian Buffer Authorization le 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 ❑ Yes ® No 1g Is the project located in any of NC s twenty coastal counties If yes answer 1 h below ❑ Yes ® No 1h Is the project located within a NC DCM Area of Environmental Concern (AEC)? ❑ Yes ® No 2 Project Information 2a Name of project Alston Pond Subdivision 2b County Wake 2c Nearest municipality / town Fuquay Vanna 2d Subdivision name 2e NCDOT only T I P or state project no 3 Owner Information 3a Name(s) on Recorded Deed North Broad Street LLC 3b Deed Book and Page No DB 12671 DP 0810 3c Responsible Party (for LLC if applicable) Tim Smith 3d Street address 100 Weston Estates Way 3e City state zip Cary NC 27513 3f Telephone no 919 481 3000 3g Fax no 3h Email address tim @prestondev com Page 1 of 12 PCN Form — Version 1 3 December 10 2008 Version 4 Applicant Information (if different from owner) 4a Applicant is ❑ Agent ❑ Other specify 4b Name 4c Business name (if applicable) 4d Street address 4e City state zip 4f Telephone no 4g Fax no 4h Email address 5 Agent/Consultant Information (if applicable) 5a Name Troy Beasley 5b Business name (if applicable) Withers and Ravenel 5c Street address 1410 Commonwealth Drive Suite 101 5d City state zip Wilmington NC 28403 5e Telephone no 910 256 9277 5f Fax no 9102562 84 5g Email address tbeasley@withersravenel com Page 2 of 12 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) PIN #s 0658523920 0658317536 lb Site coordinates (in decimal degrees) Latitude 35 6262765 Longitude 78 8132158 (DD DDDDDD) ( DD DDDDDD) 1c Property size ±148 acres 2 Surface Waters 2a Name of nearest body of water (stream river etc) to Basal Creek proposed project 2b Water Quality Classification of nearest receiving water B NSW (Stream Index #27 43 15 3 2c River basin Neuse River Basin 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 site is approximately 75% forested and 25% agricultural fields A small residential community is located to the north NC Hwy 55 is located to the west and Basal Creek borders the property to the east 3b List the total estimated acreage of all existing wetlands on the property ±9 62 acres 3c List the total estimated linear feet of all existing streams (intermittent and perennial) on the property ±4 579 If 3d Explain the purpose of the proposed project The purpose of the proposed project is to construct a residential subdivision 3e Describe the overall project in detail including the type of equipment to be used The overall project includes the construction of a residential community Large grading equipment will be used to install the infrastructure (i a roads sewer BMPs) and prepare the site for construction of the residential homes and apartments 4 Jurisdictional Determinations 4a Have jurisdictional wetland or stream determinations by the Corps or State been requested or obtained for this property / ®Yes El No El Unknown project (including all prior phases) in the past Comments 4b If the Corps made the jurisdictional determination what type ❑ Preliminary ® Final of determination was made? 4c If yes who delineated the jurisdictional areas? Agency /Consultant Company Withers and Ravenel Name (if known) Todd Preuninger Other 4d If yes list the dates of the Corps jurisdictional determinations or State determinations and attach documentation Corps JD — 6/13/2008 (AID #200800680) DWQ Buffer Determination — March 20 2007 (Project # NBRRO 07 028) 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 NWP 3 & 29 — issued 6/13/2008 — AID# 200800680 401 WQC and Buffer Authorization — issued 8/26/2008 — DWQ Project # 08 0067 Ver 2 401 WC and Buffer Authorization — issued 4/19/2011 — DWQ Project #08 0067 Ver 3 Page 3 of 12 PCN Form — Version 1 3 December 10 2008 Version �6 Future Project Plans 6a Is this a phased project? ® Yes ❑ No 6b If yes explain The subdivision will be constructed in Phases However the impacts for the entire project are being permitted as a single project Page 4 of 12 PCN Form — Version 1 3 December 10 2008 Version C Proposed Impacts Inventory 1 Impacts Summary 1 a Which sections were completed below for your project (check all that apply) ® Wetlands ® Streams tributaries ® Buffers ❑ Open Waters ❑ Pond Construction 2 Wetland Impacts If there are wetland impacts proposed on the site then complete this question for each wetland area impacted 2a 2b 2c 2d 2e 2f Wetland impact Type of jurisdiction number — Permanent Type of impact Type of wetland Forested (Corps 404 10 Area of impact P or Temporary T if known DWQ —non 404 other acres Impact 1A ® P ❑ T Permanent / Fill Headwater Forest ® Yes ❑ No ® Corps ® DWQ 0 015 ac Impact 8 ® P ❑ T Permanent / Fill Headwater Forest ® Yes ❑ No ® Corps ® DWQ 0 005 ac Impact 9 ® P ❑ T Permanent / Fill Headwater Forest ® Yes ❑ No ® Corps ® DWQ 0 011 ac Impact 11 ❑ P ® T Sewer Construction Headwater Forest ® Yes ❑ No ® Corps ® DWQ 0 014 ac Impact 12 ® P ❑ T Permanent / Fill Headwater Forest ® Yes ❑ No ® Corps ® DWQ 0 003 ac 2g Total wetland impacts 0 048 ac 2h Comments Impacts to wetlands will occur from rehabilitation of an existing dam to meet dam safety requirements 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 Permanent (PER) or (Corps 404 10 stream length (P) or Temporary (T) intermittent DWQ — non 404 width (linear (INT)? other) (feet) feet) Impact 3 ® P ❑ T Fill / Culvert UT to Basal ® PER ® Corps 5 297 If Creek ❑ INT ® DWQ Impact 15 ❑ P ® T Sewer Crossing UT to Basal Creek ❑ PER ® INT ® Corps ® DWQ 3 23 If 3h Total stream and tributary impacts 320 If 31 Comments Page 5 of 12 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 Open water impact number — Permanent P) or Temporary T 4b Name of waterbody if applicable) 4c Type of impact 4d Waterbody type 4e Area of impact (acres) 01 ❑P ❑T 02 ❑P ❑T 03 ❑P ❑T 04 ❑P ❑T 4f Total open water impacts 4g Comments 5 Pond or Lake Construction If pond or lake construction proposed then complete the chart below 5a Pond ID number 5b Proposed use or purpose of pond 5c Wetland Impacts (acres) 5d Stream Impacts (feet) 5e Upland (acres) 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 51 Expected pond surface area (acres) 5j Size of pond watershed (acres) 5k Method of construction Page 6 of 12 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 — Permanent (P) or Reason for Buffer Zone 1 impact Zone 2 impact Temporary (T) impact Stream name mitigation (square feet) (square feet) required? Impact 1 ® P ❑ T C oss rig UT to Basal Creek ®Nos N/A 9 242 sq ft Impact 2 ® P ❑ T C oss rig UT to Basal Creek 839 ® Nos 18 sq ft N/A Impact 4 ® P ❑ T Channel UT to Basal Creek ®Nos 456 sq ft N/A Grading and ❑ Yes Impact 5 ® P ❑ T outfall UT To Basal Creek ® No N/A 1 191 sq ft structure Impact 6 ® P ❑ T C oss rig UT To Basal Creek ® Nos N/A 3 707 sq ft Impact 7 ® P ❑ T C oss rig UT To Basal Creek ®Nos 2 503 sq ft N/A Impact 10 ® P ❑ T Grading UT To Basal Creek ® Yes s N/A 4 665 sq ft Impact 13 ® P ❑ T Cot uction UT To Basal Creek ® Nos N/A 426 sq ft Impact 14 ® P ❑ T Cot uction UT To Basal Creek 485 ®Nos 1 sq ft N/A Impact 16 ® P ❑ T Co ewerion UT To Basal Creek ® Nos N/A 668 sq ft Impact 17 ® P ❑ T Grading UT To Basal Creek ® Yes s N/A 668 sq ft Impact 18 ® P ❑ T Channel UT To Basal Creek No ®Nos 285 sq ft Impact 19 ® P ❑ T Bypass Channel UT To Basal Creek ® Nos 61 sq ft N/A Impact 20 ® P ❑ T Grading UT To Basal Creek ® Nos N/A 2 553 sq ft 6h Total buffer impacts 23 344 sq ft 23 405 sq ft 61 Comments Because buffer impacts for the northern road crossing (Sheet B) are less than 1/3 of an acre and grading within zone 2 sewer lines less than 40 If and stormwater conveyances are considered an allowable uses the applicant is not proposing buffer mitigation for these buffer impacts Since buffer impacts for the Hilltop Needmore Road Extension (Sheet A) is greater than 1/3 acre buffer mitigation will be required and is proposed as documented in Section C 3b & 6f D Impact Justification and Mitigation 1 Avoidance and Minimization 1a Specifically describe measures taken to avoid or minimize the proposed impacts in designing project Prior to site plan development the applicant requested that a detailed wetland delineation be conducted so that impacts to wetlands and waters could be minimized A stream channel bi sects the property and in order to access high ground impacts were unavoidable Impacts from the Hilltop Needmore Road extension crossing were minimized by crossing the channel at a nearly perpendicular angle and utilizing 2 1 back slopes (Sheet A) A headwall was utilized to avoid additional wetland impacts from the northern road (Sheet B) Backslopes to stabilize lot fill were designed at a 2 1 slope to minimize wetland impacts as well The greenway trail was designed to utilized elevated pedestrian bridges at wetland and stream Page 7 of 12 PCN Form — Version 1 3 December 10 2008 Version crossings to further minimize wetland impacts 1b Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques Head walls will be used to stabilize fill at the northern road crossings and pedestrian bridges will be used for greenway crossings Also silt fencing will be installed around all disturbed areas to prevent sediment from escaping the site and entering downstream waters and wetlands 2 Compensatory Mitigation for Impacts to Waters of the U S or Waters of the State 2a Does the project require Compensatory Mitigation for impacts to Waters of the U S or Waters of the State? ® Yes ❑ No 2b If yes mitigation is required by (check all that apply) ® DWQ ® Corps 2c If yes which mitigation option will be used for this project? ® Mitigation bank ❑ Payment to in lieu fee program ❑ Permittee Responsible Mitigation 3 Complete if Using a Mitigation Bank 3a Name of Mitigation Bank Stream Mitigation — EBX EM LLC Buffer Mitigation — Wddlands Neuse River Riparian Buffer & Nutrient Umbrella Mitigation Bank 3b Credits Purchased (attach receipt and letter) Type Stream & Buffer Quantity Stream 594 If Buffer 70 380 sq ft 3c Comments Copies of Letters of Reservation from both mitigation banks are attached as Appendices 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 Page 8 of 12 PCN Form — Version 1 3 December 10 2008 Version 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 ® Yes ❑ No buffer mitigation? 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 6c 6d 6e Zone Reason for impact Total impact Multiplier Required mitigation (square feet) (square feet) Zone 1 Hilltop Needmore Road Crossing 18 839 sq ft 3 (2 for Catawba) 56 517 sq ft Zone 2 Hilltop Needmore Road Crossing 9242 sq ft 1 5 13 863 sq ft 6f Total buffer mitigation required 70 380 sq ft 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) Buffer mitigation will be provided through purchase of riparian buffer mitigation from Wddlands Neuse River Riparian Buffer & Nutrient Umbrella Mitigation Bank A copy of the Letter of Reservation has been provided as an Appendix 6h Comments Page 9 of 12 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 ® 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 ®Yes E] No Comments 2 Stormwater Management Plan 2a What is the overall percent imperviousness of this project? 31 % 2b Does this project require a Stormwater Management Plan? ® Yes ❑ No 2c If this project DOES NOT require a Stormwater Management Plan explain why 2d If this project DOES require a Stormwater Management Plan then provide a brief narrative description of the plan The stormwater management plan for this project was approved under the previously issued 401 WQC for the Alston Pond project (DWQ Project # 08 0067 Ver 3) The revisions to the Hilltop Needmore Road crossing did not result in a modification to the previously approved stormwater management 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 ❑ USMP apply (check all that apply) ❑ 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 ❑ HQW 4a Which of the following state implemented stormwater management programs apply ❑ 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 10 of 12 PCN Form — Version 1 3 December 10 2008 Version F Supplementary Information 1 Environmental Documentation (DWQ Requirement) la Does the project involve an expenditure of public (federal /state /local) funds or the ❑ Yes ® No use of public (federal /state) land? lb 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 ❑ 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 This is a single and complete project with no additional phases proposed at this time 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 Page 11 of 12 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? El Raleigh 5c If yes indicate the USFWS Field Office you have contacted ❑ Asheville 5d What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat? W &R reviewed the NC OneMap Viewer GIS website located at http / /www nconemap net/Default aspx ?tabid =286 to identify if any potential occurrence of endangered species on or near the proposed project The review of the GIS database did not identify any recent occurrences of endangered species or critical habitat on the subject property or within 0 5 miles of the project The previous issuance of NWPs 3 & 29 documents that the proposed project will not impact endangered species or critical habitat It should also be noted that this project was previously permitted which documents that the project will not result in impacts to Endangered Species or Critical Habitat 6 Essential Fish Habitat (Corps Requirement) 6a Will this project occur in or near an area designated as essential fish habitats 7[- Yes ®No 6b What data sources did you use to determine whether your site would impact Essential Fish Habitat? There are no waters designated as EFH in Wake County 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 ❑ 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? There are no historic structures located on the project site 8 Flood Zone Designation (Corps Requirement) 8a Will this project occur in a FEMA designated 100 year floodplain? FEJ es ® No 8b If yes explain how project meets FEMA requirements 8c What source(s) did you use to make the floodplain determination? FEMA FIRM Panel 0658J Troy Beasley Withers and Ravenel 1 /9/12 Applicant/Agent sprinted Name Date Applicant/Agent s Signature (Agents signature is valid only if an authorization letter from the applicant is provided ) Page 12 of 12 PCN Form — Version 1 3 December 10 2008 Version 13VH01p'831313NH3S - Ad *1 :6Z:1 ZIOZ'60 A— ..,'AOp.on - 6MD'L1.11-1T'dryl —.Pu N doln!H \OIOZ SdW1 L3YdN \6.!11!—d PlNJ VOld \GHOd -OISW - -'I "ld- 6K'001 \OKO- 01 \01\%H �1 II •,1 �; a aim wI W i 1.i� .C4u Ee"�!w\r •ix,Ft�— - .l.i�i� _w- xMty I I I I I I I I I I I I IMPACT #1A I I I PER�VIAN�NT I I\ WETANDS+IMPACT �70 S� (0.0 (5 AO \\ \ r Ir ibmww \ .o RIP -RIP STREAM BANK WICLASS 1 r r RIP -RAP, 18" THICK. HAND PLACE I + ONLY TO ENSURE NO STREAM �\ t r r DISTURBANCE - NO RIP RAP SHALL i i PROFOSE91 r I BE PL ACED BELOW THE OHW r I RIP RAP CHi NEI iii II r r i i II k�� TO§STREAM�HIGH i t rr r r r I JF. v FLOW PYPASS , r EP'N ZON 2 IMPACT #1 IMPACT #2 IMPACT #3 IMPACT #4 IMPACT #5 PERMANENTZONE2 PERMANENTZONEI PERMANENT PERENNIAL PERMANENTZONEI PERMANENT ZONE 2 BUFFER IMPACT BUFFERIMPACT STREAM IMPACT BUFFERIMPACT BUFFERIMPACT 9,242 SF (0.212 AC) 18,839 SF (0.432 AC) 297 LF 456 SF (0.010 AC) 1,191 SF (0.027 AC) 1,177 SF 0.027 AC p Jl..1LL. I Illl,ll = 'iU IL. ALSTON POND SHEET A WITHERS &- RAVENEL IMPACTS #1 - #5 ENGINEERS I PLANNERS I SURVEYORS FU UAY- VARINA WAKE COUNTY North Carolina mM�,,.om.a u�x oror., rssn o- - „„