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HomeMy WebLinkAbout20061804 Ver 4_401 Application_20120912I p�_ X80 L)q N :•W E'i BURDETTE LAND CONSULTING, INC. 10212 Creedmoor Road - Raleigh, North Carolina 27615 Telephone (919) 841 - 9977— Fax (919) 841 -9909 S This letter requests a buffer authorization only and does not require a WQC fee. September 25, 2012 Mr. Ian McMillan Wetlands, Buffers, Stormwater Compliance and Permitting Unit NC Division of Water Quality 512 N. Salisbury Street Raleigh, North Carolina 27604 RE: Riparian Buffer Authorization Pre - Construction Applicatio Jimpmmm Peachtree Phase Two (1 Clayton, Johnston County, North Carolina J AID #: SAW- 2008 -01712 S EP 2 5 2012 DWQ #: 20061804, V.X K BLC Project #: 11362 ,_OENR --WATER _ Dear Mr. McMillan: Peachtree Phase Two is part of The Village @ Flowers Plantation development. This development received an Individual Permit (IP) on April 23, 2010 from the US Army Corps of Engineers that remains valid until December 31, 2035. NCDWQ issued a 401 Water Quality Certification approval for the project on March 15, 2010. These approvals included stream channel, wetland and riparian buffer impacts for the development's proposed road network. Lennar Carolinas, LLC ( Lennar) purchased Peachtree Phase One in 2008 and developed this phase including providing diffuse flow without impacts to streams, wetlands and riparian buffers. Lennar has copies of the permit issued for the overall project and understands compliance is required. It is important to note that the stream channel impact proposed for the road crossing labeled as Impact #1 in the IP has not been initiated and is not part of the Lennar project. Purchased in 2011, Peachtree Phase Two is 20 acres in size and located on the northwest side of Flowers Parkway approximately 2000 feet southwest of Buffalo Road (SR 1003) east of Clayton, Johnston County, North Carolina. This phase requires three riparian buffer impacts for an aerial sanitary sewer crossing and level spreader bypass channels. Mr. Ian McMillan BLC Project #: 11362 September 25, 2012 Page 2 of 2 Attached is a Pre - construction Application (PCN) requesting buffer authorization for these proposed impacts. Please do not hesitate to call Mr. Kevin Varnell at (252) 459 -8196 if you have any questions about the diffuse flow plans or documentation provided or me for questions about the PCN application. Sincerely, Burdette Land Consulting, Inc. Jennifer A. Burdette Environmental Specialist Attachments PCN Application USGS.Topographic Location Map (Figure 1) JohnstonVounty Soil Survey Map (Figure 2) The Village @ Flowers Plantation Overall Site Plan (C -01) .Buffer Impact Map Revised 8/30/12 (C- ) Flowers Plantation Individual Permit Letter (4/22/10) The Village @ Flowers Plantation 401 WQC Letter (3/15/12)" 'Agent'Authorization Form - Sitework Calculations LS -VFS Supplements (7 -9) O & M Agreement LS Runoff Map Erosion Control Runoff Map Construction Drawings (Cover Sheet, C -1 — C -7 & D -1 — D -5) c: Lennar Carolinas, LLC c/o Doug Radford — JPM South Development Kevin Varnell — Stocks Engineering, PA Thomas Brown — USACE O�OF WAT�c�QG Sr s Y Office Use Only: Corps action ID no. DWQ project no. Form Version 1.3 Dec 10 2008 Pre - Construction Notification (PCN ) Form A. Applicant Information 1. Processing 1 a. Type(s) of approval sought from the Corps: ❑Section 404 Permit ❑Section 10 Permit 1b. Specify Nationwide Permit (NWP) number: 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 ❑ Non404 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. ❑ Yes ® No 1g. Is the project located in any of NC's twenty coastal counties. If yes, answer 1h 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: Peachtree Phase 2 2b. County: Johnston 2c. Nearest municipality / town: Clayton 2d. Subdivision name: Flowers Plantation 2e. NCDOT only, T.I.P. or state project no: NA 3. Owner Information _Z@@!4 � � 3a. Name(s) on Recorded Deed: Lennar Carolinas, LLC DB 03985; PG 0626 Niv UU 3b. Deed Book and Page No. 3c. Responsible Party (for LLC if applicable): Patricia Hanchette 909 Aviation Pkwy Ste 700 Morrisville NC 27560 -6632 2 QU 3d. Street address: 3e. City, state, zip: 3f. Telephone no.: (919) 337 -0241 3g. Fax no.: NA 3h. Email address: trish.hanchette @lennar.com Page 1 of 10 PCN Form — Version 1.3 December 10, 2008 Version 0 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: Jennifer A. Burdette 5b. Business name (if applicable): Burdette Land Consulting, Inc. 5c. Street address: 10212 Creedmoor Road 5d. City, state, zip: Raleigh, NC 2765 5e. Telephone no.: (919) 841 -9977 5f. Fax no.: (919) 841 -9909 5g. Email address: J BurdetteBLC(cDbellsouth. net i Page 2 of 10 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): 169900 -14 -0825 1 b. Site coordinates (in decimal degrees): Latitude: 35.6572456 Longitude: - 78.3582672 (DD.DDDDDD) (- DD.DDDDDD) 1c. Property size: 20.35 acres 2. Surface Waters 2a. Name of nearest body of water (stream, river, etc.) to UT to Mill Creek proposed project: 2b. Water Quality Classification of nearest receiving water: WS -IV; NSW 2c. River basin: Neuse 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 consists of mixed pine /hardwood forest except for areas that have been cleared for subdivision roads. General land use in the vicinity of the project consists of pine forest and residential subdivisions. Please refer to the attached USGS Location Map (Figure 1) and Johnston County Soil Survey Map (Figure 2) for more information on the project setting. 3b. List the total estimated acreage of all existing wetlands on the property: <1 3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property: 3500 3d. Explain the purpose of the proposed project: The purpose of the project is to construct a residential subdivision of single - family homes to serve the residents of the Clayton area. 3e. Describe the overall project in detail, including the type of equipment to be used: Peachtree Phase Two consists of proposed roads, sanitary sewer and level spreaders necessary to develop a single - family residential subdivision. This phase requires three riparian buffer impacts for an aerial sanitary sewer crossing and level spreader bypass channels. Attached is a Buffer Impact Map prepared by Stocks Engineering, PA and labeled by BLC showing the proposed buffer impacts and the proposed sanitary sewer and stormwater crossing designed to avoid impact to a nonbuffered, jurisdictional stream channel. 4. Jurisdictional Determinations 4a. Have jurisdictional wetland or stream determinations by the Corps or State been requested or obtained for this property / project (including all prior phases) in the past? ®Yes [:1 No El Unknown Comments: A jurisdictional determination was completed for the entire property in approximately 2007 prior to the Individual Permit issuance in 2010. 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: Soil & Environmental Name (if known): Consultants, PA Other: 4d. If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation. On August 28, 2012, Mr. Thomas Brown of the USACE confirmed that the jurisdictional determination completed as part of the Individual Permit process remains valid. Page 3 of 10 PCN Form — Version 1.3 December 10, 2008 Version 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. Peachtree Phase 2 is part of The Village @ Flowers Plantation development. This development (SAW- 2008 - 01712) received the attached Individual Permit on April 23, 2010 from the US Army Corps of Engineers that remains valid until December 31, 2035. The NCDWQ issued the attached 401 Water Quality Certification approval for the project (DWQ #20061804) on March 15, 2010. These approvals included stream channel, wetland and riparian buffer impacts for the development's proposed road network. Mr. Kevin Varnell of Stocks Engineering, PA was involved with this permitting and subsequent buffer authorizations in which the areas labeled on the attached The Village @ Flowers Plantation Overall Site Plan Revised 04/1/08 as Existing Development were determined to be grandfathered with respect to the current 401 WQC stormwater treatment requirements. Lennar Carolinas, LLC ( Lennar) purchased Peachtree Phase One in 2008 and developed this phase including providing diffuse flow without impacts to streams, wetlands and riparian buffers. Lennar has copies of the permit issued for the overall project and understands compliance is required. It is important to note that the stream channel impact proposed for the road crossing labeled as Impact #1 in the IP has not been initiated and is not part of Lennar's project. 6. Future Project Plans 6a. Is this a phased project? ❑ Yes ❑ No 6b. If yes, explain. 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 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 [:]PDT ❑ Yes ❑ Corps ❑ No ❑ DWQ 2g. Total wetland impacts 2h. Comments: NA 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 ❑ T ❑ PER ❑ Corps ❑ INT ❑ DWQ 3h. Total stream and tributary impacts 3i. Comments: Impacts to the nonbuffered, jurisdictional stream channel labeled as Impact #2 will be avoided using construction techniques. The sanitary sewer crossing is an aerial crossing that will span the channel, and the stormwater line crossing will be installed by boring under the channel. Page 4 of 10 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 01 ❑ PEI 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. 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 K Total 5g. Comments: 5h. Is a dam high hazard permit required? ❑ Yes ❑ No If yes, permit ID no: 5i. Expected pond surface area (acres): 5j. Size of pond watershed (acres): 5k. Method of construction: 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 for impact Buffer Zone 1 impact Zone 2 impact Permanent (P) or Stream name mitigation (square feet) (square feet) Temporary T required? aerial sanitary B1 ®P ❑ T sewer crossing & LS bypass channel UT to Mill Creek ® Nos 2,864 1,364 (Impact #1) B2 ®P ❑ T LS bypass channel UT to Mill Creek ❑ Yes 669 419 (Impact #3) ® No 6h. Total buffer impacts 3,533 1,783 6i. Comments: The proposed level spreader bypass channels qualify as new drainage ditches, roadside ditches and stormwater outfalls provided that a stormwater management facility is installed to control nitrogen and attenuate flow before the conveyance use that is allowable. The proposed aerial sanitary sewer crossing is a perpendicular crossing that disturbs less than 40 linear feet or riparian buffer, which is an exempt use. Buffer mitigation is not required for exempt and allowable uses. Page 5 of 10 PCN Form — Version 1.3 December 10, 2008 Version D. Impact Justification and Mitigation 1. Avoidance and Minimization 1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project. The aerial sanitary sewer crossing (Impact #1) was aligned to cross the riparian buffer at a perpendicular angle to minimize the proposed impact. Two proposed level spreaders require bypass channels to the receiving stream to prevent erosion within the riparian buffer. 1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques. The proposed sanitary sewer crossing is an aerial crossing that spans the channel, and the stormwater line will be bored under the channel to avoid impacting the stream channel. 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: 3b. Credits Purchased (attach receipt and letter) Type Quantity 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. Page 6 of 10 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 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: E. Stormwater Management and Diffuse Flow Plan (required by DWQ) 1. Diffuse Flow Plan 1 a. 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. Comments: Mr. Kevin Varnell of Stocks Engineering, PA was involved with Individual Permit and 401 WQC for the overall project and subsequent buffer authorizations in which the areas labeled as Existing Development on the attached The Village @ Flowers Plantation Overall Site Plan Revised 04/1/08 were determined to be grandfathered with respect to the current 401 WQC stormwater ® Yes El No treatment requirements, but remain subject to the NRB riparian buffer diffuse flow requirement. Stocks Engineering, PA prepared a diffuse flow plan for the project. Their Sitework Calculations including LS -VFS (7 -10) supplement sheets, O & M agreement and runoff maps for erosion control and the proposed level spreaders are attached. A complete set of the project construction drawings (Cover Sheet, C- 1 — C -7 & D -1 — D -5 ) revised on 8/8/12 are also attached. Page 7 of 10 PCN Form — Version 1.3 December 10, 2008 Version 2. Stormwater Management Plan 2a. What is the overall percent imperviousness of this project? % 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: ❑ 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 8 of 10 PCN Form — Version 1.3 December 10, 2008 Version F. Supplementary Information 1. Environmental Documentation (DWQ Requirement) 1 a. Does the project involve an expenditure of public (federal /state /local) funds or the ❑ Yes ❑ No use of public (federal /state) land? 1 b. If you answered "yes" to the above, does the project require preparation of an environmental document pursuant to the requirements of the National or State ❑ Yes ❑ No (North Carolina) Environmental Policy Act (NEPA/SEPA)? 1c. If you answered "yes" to the above, has the document review been finalized by the State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval 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 PCN application is for level spreader bypass channels and an aerial sanitary sewer crossing in a section of existing development within The Village at Flowers Plantation, which has valid Section 404 and 401 permits. 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 9 of 10 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? ❑ 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? 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? 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? 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: 8c. What source(s) did you use to make the floodplain determination? Jennifer A. Burdette _ /�, 9/25/12 Applic n Wen_s P 'nted Name Date App Agent's ignature (Agent's signature is va only i a orization letter from the applicant is provided.) Page 10 of 10 PCN Form — Version 1.3 December 10, 2008 Version � M aim Mo i MM GRAPHIC SCALE I" = 2000' USGS LOCATION MAP 2000' 0 2000' PEACHTREE AT FLOWERS PLANTATION CLAYTON, JOHNSTON COUNTY, NC DATE: 02-22-12 FLOWERS 2010 BURDETTE LAND CONSULTING, INC. 10212 Creedmoor Road - Raleigh, North Carolina 27615 Telephone (919) 841-9977 — Fax (919) 841-9909 I-wx1jjV-"1FM= ,s GRAPHIC SCALE N 1" = 2000' JOHNSTON COUNTY SOIL SURVEY MAP 2000' 0 2000' PEACHTREE AT FLOWERS PLANTATION .c CLAYTON, JOHNSTON COUNTY, NC N� DATE: 08 -22 -12 SHEET(S):2 RDETTE LAND CONSULTING, INC. DRAWN BY: JAB CHK'DBY: JAB W E BU 10212 Creedmoor Road - Raleigh, North Carolina 27615 _ Telephone (919) 841 -9977— Fax (919) 841 -9909 PROJECT #: 11362 s FIGURE #: 2 1 n O CS NMI M I W S L 'z z z 1 F� W Mz Z z z u■rm■Ilwnsa :aen�msasa ` Q a F b a v n F z z e n z z z z W e. u < It �3 v J d= m � � F gee i Y le z z z � a 3 e a �.n�lu■Inaa�mal� Ism ■Ilwn�rsaesn®IEaarsn�nwa�lt�l � ,IS;Iw ac�lwn � � SSSS� z 4 R u Op O o p o � y rpp5q S � CaW 4 t o 0 o c o c o << b g F 3 � li -. N t•1 `O r 00 O, � � N � V �D 0y0 O, O O O M 0 O LO N O O O N O O ocmm ■ Q m m I I n ■ Nm0 Y�m N ^N ` v0 - VV■". _ 4 z oC < W ZV �JZ F W W ws oN H o< go Z N w �zv ox a� N �e 0 U N Z 1/I R NMI M I W S L 'z z z 1 F� W Mz Z z z u■rm■Ilwnsa :aen�msasa ` Q a F b a v n F z z e n z z z z W e. u < It �3 v J d= m � � F gee i Y le z z z � a 3 e a �.n�lu■Inaa�mal� Ism ■Ilwn�rsaesn®IEaarsn�nwa�lt�l � ,IS;Iw ac�lwn � � SSSS� z 4 R u Op O o p o � y rpp5q S � CaW 4 t o 0 o c o c o << b g F 3 � li -. N t•1 `O r 00 O, � � N � V �D 0y0 O, O O O M 0 O LO N O O O N O O ocmm ■ DEPARTMENT OF THE ARMY WILMINGTON DISTRICT, CORPS OF ENGINEERS 69 DARLINGTON AVENUE WILMINGTON, NORTH CAROLINA 28403 -1343 REPLY TO ATTENTION OF April 22, 2010 Regulatory Division Action ID: SAW- 2008 -01712 Ms. Rebecca Flowers River Dell Company Inc. 4880 NC 42 East Clayton, North Carolina 27527 Dear Ms. Flowers: �o� ply T� . Al In accordance with your written request of May 1, 2008, and the ensuing administrative record, enclosed is a copy of a permit to authorize the proposed permanent placement of fill material into 868 linear feet of important stream, 416 linear feet of unimportant stream and 0.122 acres of non - riparian wetlands, and the temporary placement of fill into 160 linear feet of important stream, 60 linear feet of unimportant stream and 0.005 acres of wetlands, associated with the construction of the infrastructure of a residential and commercial development. The project site is located in all 4 quadrants of the intersection of NC-42, and NCSR 1003 (Buffalo Road), east of Clayton, Johnston County, North Carolina. Any deviation in the authorized work will likely require modification of this permit. If a change in the authorized work is necessary, you should promptly submit revised plans to the Corps showing the proposed changes. You may not undertake the proposed changes until the Corps notifies you that your permit has been modified. Carefully read your permit. The general and special conditions are important. Your failure to comply with these conditions could result in a violation of Federal law. Certain significant general conditions require that: a. You must complete construction before December 31, 2035. b. You must notify this office in advance as to when you intend to commence and complete work. c. You must allow representatives from this office to make periodic visits to your worksite as deemed necessary to assure compliance with permit plans and conditions. You should address all questions regarding this authorization to Mr. Thomas Brown at the Raleigh Regulatory Field Office, telephone (919) 554 -4884 extension 22. -2- Enclosures Copies Furnished (with enclosures): Chief, Source Data Unit NOAA/National Ocean Service ATTN: Sharon Tear N /CS261 1315 East -west Hwy., Rm 7316 Silver Spring, MD 20910 -3282 Copies Furnished with special conditions and plans: U.S. Fish and Wildlife Service Fish and Wildlife Enhancement Post Office Box 33726 Raleigh, North Carolina 27636 -3726 Mr. Ron Sechler National Marine Fisheries Service Pivers Island Beaufort, North 28516 Sincerely, Jefferson M. Ryscavage Colonel, U.S. Army District Commander Mr. Ronald J. Mikulak, Chief Wetlands Protection Section — Region IV Water Management Division U.S. Environmental Protection Agency 61 Forsyth Street Atlanta, Georgia 30303 Mr. Doug Huggett Division of Coastal Management N.C. Department of Environment and Natural Resources 400 Commerce Avenue Morehead City, North Carolina 28557 Mr. David Rackley National Marine Fisheries Service 219 Fort Johnson Road Charleston, South Carolina 29412 -9110 DEPARTMENT OF THE ARMY PERMIT Permittee: MS. REBECCA FLOWERS RIVER DELL COMPANY, INC. Permit No: SAW - 2008 -01712 Issuing Office: USAED, WILMINGTON NOTE: The term "you" and its derivatives, as used in this permit, means the permittee or any future transferee. The term "this office" refers to the appropriate district or division office of the Corps of Engineers having jurisdiction over the permitted activity or the appropriate official of the office acting under the authority of the commanding officer. You are authorized to perform work in the accordance with the terms and conditions specified below. Project Description: The project involves the construction of the infrastructure (i.e. roads) that would support the residential and commercial development of property currently owned by the applicant, Rebecca Flowers of River Dell Company, Inc. The project permanently impacts 868 linear feet of important stream, 416 linear feet of unimportant stream and 0.122 acre of non - riparian wetlands to construct the seventeen (17) road crossings from the placement of culverts and fill material. In addition, 160 linear feet of important stream, 60 linear feet of unimportant stream and 0.005 acre of wetlands will be temporarily impacted with the construction of these road crossings. Project Location: The project site is located on approximately 1200 acres of land within the northwest, northeast, southwest and southeast quadrants of the NC Highway 42 (NC42) and Buffalo Road (SR 1003) intersection, east of Clayton, Johnston County, North Carolina (35.6520° N, - 78.3437 W). The project -- site includes po Ions o I an u a o cree s, severa o their unnamed r' n - wettand — adjacent to these water bodies in the Neuse River Basin (8 -Digit Cataloging Unit 03020201). Permit Conditions: General Conditions: 1. The time Limit for completing the work authorized ends on December 31, 2035. If you rind that you need more time to complete the authorized activity, submit your request for a time extension to this office for consideration at least one month before the above date is reached. 2. You must maintain the activity authorized by this permit in good condition and in conformance with the terms and conditions of this permit. You are not relieved of this requirement if you abandon the permitted activity, although you may make a good faith transfer to a third party in compliance with General Conditions 4 below. Should you wish to cease to maintain the authorized activity or should you desire to abandon it without a good faith transfer, you must obtain a modification of this permit from this office, which may require restoration of the area. 3. If you discover any previously unknown historic or archeological remains while accomplishing the activity authorized by this permit, you must immediately notify this office of what you have found. We will initiate the Federal and state coordination required to determine if the remains warrant a recovery effort or if the site eligible for Iisting in the National Register of Historic Places. ENG Form 1721, Nov 86 EDITIONS OF SEP 82 IS OBSOLETE. (33 DFR 325 (Appendix A)) 4. If you sell the property associated with this permit, you must obtain the signature of the new owner in the space provided and forward a copy of the permit to this office to validate the transfer of this authorization. S. If a conditioned water quality certification has been issued for your project, you must comply with the conditions specified in the certification as special conditions to this permit. For your convenience, a copy of the certification is attached if it contains such conditions. 6. You must allow representatives from this office to inspect the authorized activity at any time deemed necessary to ensure that it is being or has been accomplished in accordance with the terms and conditions of your permit. Special Conditions: *SEE ATTACHED SPECIAL CONDITIONS Further Information: 1. Congressional Authorities: You have been authorized to undertake the activity described above pursuant to: ( ) Section 10 of the Rivers and Harbors Act of 1899 (33 U.S. C. 403). (X) Section 404 of the clean Water Act (33 U.S.C. 1344). ( ) Section 103 of the Marine Protection, Research and Sanctuaries Act of 1972 (33 U.S.C. 1413). 2. Limits of this authorization. a. This permit does not obviate the need to obtain other Federal, state, or local authorizations required by law. b. This permit does not grant any property rights or exclusive privileges. c. This permit does not authorize any injury to the property or rights of others. d. This permit does not authorize interference with any existing or proposed Federal project. 3. Limits of Federal Liability. In issuing this permit, the Federal Government does not assume any liability for the following: a. Damages to the permitted project or uses thereof as a result of other permitted or unpermitted activities or from natural causes. b. Damages to the permitted project or uses thereof as a result of current or future activities undertaken by or on behalf of the United states in the public interest. c. Damages to persons, property, or to other permitted or unpermitted activities or structures caused by the activity authorized by this permit. d. Design or construction deficiencies associated with the permitted work. 2 *U.S. GOVERNMENT PRINTING OFFICE: 1986 - 717 -425 e. Damage claims associated with any future modification, suspension, or revocation of this permit. 4. Reliance on Applicant's Data: The determination of this office that issuance of this permit is not contrary to the public interest was mad in reliance on the information you provided. 5. Reevaluation of Permit Decision. This office may reevaluate its decision on this permit at any time the circumstances warrant. Circumstances that could require a reevaluation include, but are not limited to, the following: a. You fail to comply with the terms and conditions of this permit. b. The information provided by you in support of your permit application proves to have been false, incomplete, or inaccurate (see 4 above). c. Significant new information surfaces which this office did not consider in reaching the original public interest decision. Such a reevaluation may result in a determination that it is appropriate to use the suspension, modification, and revocation procedures contained in 33 CFR 325.7 or enforcement procedures such as those contained in 33CFR 326.4 and 326.5. The referenced enforcement procedures provide for the issuance of an administrative order requiring you to comply with the terms and conditions of your permit and for the initiation of legal action where appropriate. You will be required to pay for any corrective measures ordered by this office, and if you fail to comply with such directive, this office may in certain situations (such as those specified in 33 CFR 209.170) accomplish the corrective measure by contract or otherwise and bill you for the cost. 6. Extensions. General condition 1 establishes a time limit for the completion of the activity authorized by this permit. Unless there are circumstances requiring either a prompt completion of the authorized activity or a reevaluation of the public interest decision, the Corps will normally give favorable consideration to a request for an extension of this time limit. Your signature below, as permittee, indicates that you accept and agree to comply with the terms and conditions of this permit. (PERMIT-FE MS. REBECCA VLOWERS (DATE) RIVER DELL COMPANY, INC. This permit becomes effective when the Feder 1 official, designated to act for the Secretary of the Army, has signed below. If I i (DISTRICT M&Y-IR (Q49--n yt7y1 2 �, Apr ;` Z.c7 o JEFFERSON M. RYSCAVAGE, COLONEL (DATE) When the structures or work authorized by this permit are still in existence at the time the property is transferred, the terms and conditions of this permit will continue to be binding on the new owner(s) of the property. To validate the transfer of this permit and the associated liabilities associated with compliance with its terms and conditions, have the transferee sign and date below. (Transferee) (Date) 3 *U.S. GOVERNMENT PRINTING OFFICE: 1986 — 717-425 SPECIAL CONDITIONS (Action ID SAW - 20080 - 1712) Work Limits a) All work authorized by this permit must be performed in strict compliance with the attached plans (Exhibit A), which are a part of this permit. Any modification to these plans must be approved by the US Army Corps of Engineers (USACE) prior to implementation. b) Except as authorized by this permit or any USACE approved modification to this permit, no excavation, fill or mechanized land- clearing activities shall take place at any time in the construction or maintenance of this project, within waters or wetlands. This permit does not authorize temporary placement or double handling of excavated or fill material within waters or wetlands outside the permitted area. This prohibition applies to all borrow and fill activities connected with this project. C) Except as specified in the plans attached to this permit, no excavation, fill or mechanized land - clearing activities shall take place at any time in the construction or maintenance of this project, in such a manner as to impair normal flows and circulation patterns within waters or wetlands or to reduce the reach of waters or wetlands. Related Laws d) All mechanized equipment will be regularly inspected and maintained to prevent contamination of waters and wetlands from fuels, lubricants, hydraulic fluids, or other toxic materials. In the event of a spill of petroleum products or any other hazardous waste, the permittee shall immediately report it to the N.C. Division of Water Quality at (919) 733 -5083, Ext. 526 or (800) 662 -7956 and provisions of the North Carolina Oil Pollution and Hazardous Substances Control Act will be followed. Project Maintenance C) The permittee shall advise the USACE in writing at least two weeks prior to beginning the work authorized by each phase of this permit and again upon completion of the work authorized by each phase of this permit. Additionally, prior to beginning the work authorized by each phase of this permit, the permittee shall hold a pre - construction meeting with the USACE, Raleigh Regulatory Field Office Project Manager, telephone 919 - 554 -4884, 22, with the USACE and the contractor who will perform the authorized work. f) Unless otherwise authorized by this permit, all fill material placed in waters or wetlands shall be generated from an upland source and will be clean and free of any pollutants except in trace quantities. Metal products, organic materials (including debris from land clearing activities), or unsightly debris will not be used. SPECIAL CONDITIONS (Action ID SAW- 20080 -1712) g) The permittee shall require its contractors and/or agents to comply with the terms and conditions of this permit in the construction and maintenance of this project, and shall provide each of its contractors and /or agents associated with the construction or maintenance of this project with a copy of this permit. A copy of this permit, including all conditions, shall be available at the project site at all times during construction and maintenance of this project. h) The permittee shall employ all sedimentation and erosion control measures necessary to prevent an unacceptable increase in sedimentation or turbidity within waters and wetlands outside the permit area. This shall include, but is not limited to, the immediate installation of silt fencing or similar appropriate devices around all areas subject to soil disturbance or the movement of earthen fill, and the immediate stabilization of all disturbed areas. Additionally, the project must remain in full compliance with all aspects of the Sedimentation Pollution Control Act of 1973 (North Carolina General Statutes Chapter 113A Article 4). i) The permittee, upon receipt of a notice of revocation of this permit, or upon its expiration before completion of the work will, without expense to the United States and in such time and manner as the Secretary of the Army or his authorized representative may direct, restore the water or wetland to its pre - project condition. j) For the installation of culverted stream crossings, the pipe inverts will be buried at least one foot below the surface of the stream for culverts greater than 48 inches in diameter. For culverts 48 inches in diameter or smaller, culverts must be buried below the bed of the surface of the stream to a depth equal to or greater than 20 percent of the diameter of the culvert. A waiver from the depth specifications in this condition may be requested in writing. The waiver will only be issued if it can be demonstrated that the impacts of complying with this condition would result in more adverse impacts to the aquatic environment. Culverts installed in jurisdictional wetlands, with no associated stream crossing are not required to be buried. Enforcement k) Violations of these conditions or violations of Section 404 of the Clean Water Act or Section 10 of the Rivers and Harbors Act must be reported in writing to the Wilmington District U.S. Army Corps of Engineers within 24 hours of the permittee's discovery of the violation. 2 SPECIAL CONDITIONS (Action ID SAW- 20080 -1712) Mitigation 1) In order to compensate for 0.122 acre of permanent impacts to wetlands, 0.005 acre of temporary impacts to wetlands, 868 linear feet of permanent impacts to streams, and 220 linear feet of temporary impacts to streams the permittee shall make payment to the North Carolina Ecosystem Enhancement Program (NC EEP) in the amount determined by the NCEEP, sufficient to perform the restoration of 0.214 acre of non - riparian wetland and 868 linear feet of warm water stream in the Neuse River Basin, Cataloging Unit 03020201. Construction within Jurisdictional areas on the property shall begin only after the permittee has made payments per the below mitigation table to the NCEEP and provided a written confirmation to the Corps that it agrees to accept responsibility for the mitigation work required, in compliance with the MOU between North Carolina Department of Environment and Natural Resources and the United States Army Corps of Engineers, Wilmington District, dated November 4, 1998. The applicant will make phased mitigation payments to the NCEEP as listed in the table below. The cost of credits will be the current price at the time of payment, not the current price at the time the permit was issued. No work on any phase of the project shall begin until the payment for that phase has been issued to the NCEEP. Phase Construction /Mitigation Number Impact Areas Mitigation Required Payment Deadline 1 1 150 LF of stream 12/31/2012 2 2 115 LF of stream - 12/31/2015 98 LF of stream & 0.019 acres of wetland (All 3 5, 12, 18, and 19 wetland mitigation paid 12/31/2019 under the EEP' /a acre minimum 4 3 150 LF of stream 12/31/2021 5 6, 7, 8, 13, and 14 295 LF of stream 12/31/2025 60 LF of stream & 0.007 6 11, 16, 17 acres of wetland 12/31/2027 (wetland paid with phase 3 7 9,10 0.096 acres of wetland 12/31/2029 aid with phase 3 SPECIAL CONDITIONS (Action ID SAW - 20080 -1712) m) In addition to the mitigation outlined above, the permittee shall also preserve 5,839 linear feet of Mill Creek with a 100 ft. undisturbed riparian buffer (13.67 acres) along the east side of Mill Creek, and shall preserve 1,543 linear feet of an unnamed tributary (UT) to Mill Creek with a full 50 ft. undisturbed riparian buffer (2.44 acres) along each side of the UT to Mill Creek by means of Declaration of Restrictions. The Declaration of Restrictions shall be identical to the model Declaration of Restrictions found on the Wilmington District website, unless changes are authorized in writing by the Wilmington District. The Declaration of Restrictions shall be recorded at the Register of Deeds office within 90 days of the issuance of this permit, and a copy of the recorded Declaration shall be provided to the Wilmington District within 30 days of its recordation. The permittee shall take no action inconsistent with the terms of the Declaration before its recordation. 0 PA Exhibit B KNEW North Carolina Department of Environment and Natural Resources Division of Water Quality Beverly Eaves Perdue Coleen H. Sullins Dee Freeman Governor Director Secretary March 15, 2010 RECEIVED Ms. Rebecca Flowers River Dell Company, Inc. MAR w 4880 NC 42 East, Clayton, NC 27527 Regulatory Lyandi Re: The Village At Flowers Plantation, Johnston County DWQ #20061804, Ver.3; USACE Action ID. No. SAW -2008 -01712 Ut to Mill Creek [030402,27-39, WSIV, NSW] Ut to Buffaloe Creek [030406, 27- 57- 16 -(3), C, NSW] APPROVAL of 401 Water Quality Certification with Additional Conditions APPROVAL of 401 Water Quality Certification and Authorization Certificate per the Neuse River Buffer Protection Rules (15A NCAC 2B.0233) with Additional Conditions — REVISED4 Dear Ms. Flowers: Attached hereto is a copy of Certification No. 3766 issued to Ms. Rebecca Flowers and River Dell Company, Inc., dated March 15, 2010. This Certification replaces the Certification issued to you on March 4, 2010. This letter shall also act as your approved Authorization Certificate for impacts to the protected riparian buffers per 15A NCAC 2B .0233. In addition, you should get any other federal, state or local permits before you go ahead with your project including (but not limited to) Solid Waste, Sediment and Erosion Control, Stormwater, Dam Safety, Non - discharge and Water Supply Watershed regulations. If we can be of further assistance, do not hesitate to contact us. Sine ly, oleen H. Sullins CHS /ijm Attachments: Certificate of Completion cc: Becky Fox, EPA Region 4,1307 Firefly Road, Whittier, NC 28789 Lauren Witherspoon, DWQ Raleigh Regional Office USACE Raleigh Regulatory Field Office File Copy Bob Zarzecki, S &EC, P.A., 11010 Raven Ridge Road, Raleigh, NC 27614 DLR Raleigh Regional Office Filename: 061804Ver3TheVillageAtFlowersPlantation (]ohnston)401_IC NBR Revised4 401 OversighVExpress Review Permitting Unit One 1650 Mail Service Center, Raleigh, North Carolina 27699 -1650 NorthCarolina Location. 2321 Crabtree Blvd , Raleigh, North Carolina 27604 Phone; 919 - 733 -17861 FAX: 919 - 733 -6893 Naturally Intemet. http'11h2o enr.state.nc.uslncweilandsl An Equal OpportunilyIAlormahe Action Employer Ms. Rebecca Flowers and River Dell Company, Inc. Page 2 of 6 March 15, 2010 NORTH CAROLINA 401 WATER QUALITY CERTIFICATION THIS CERTIFICATION is issued in conformity with the requirements of Section 401 Public Laws 92 -500 and 95 -217 of the United States and subject to the North Carolina Division of Water Quality (DWQ) Regulations in 15 NCAC 2H, Section .0500 to Ms. Rebecca Flowers and River Dell Company, Inc., to fill or otherwise impact 0.122 acres of 404 /wetland (permanent impact), 0.005 acres of 404 /wetland impact (temporary), 1,284 linear feet of permanent stream impact (868 perennial stream impact and 416 linear feet intermittent stream impact), 220 linear feet of temporary stream impact (160 linear feet perennial stream impact and 60 linear feet intermittent stream impact) and 79,584 square feet of Zone 1 Neuse River basin protected riparian buffer, and 39,603 square feet of Zone 2 Neuse River basin protected riparian buffer, to construct a mixed -use development, which is located on all four quadrants of the intersection of Buffalo Road (SRI 003) and NC Highway 42, east of Clayton, Johnston County, North Carolina, pursuant to an application dated April 28, 2008, and received by DWQ on May 1, 2008, and by Public Notice by the U.S. Army Corps of Engineers issued on the 30th day of May of 2008 (received by DWQ on May 30, 2008), and all additional information received from you on July 16, 2008, September 12, 2008, October 23, 2008, and February 4, 2010. This Certification shall also act as your approved No Practical Alternatives determination for impacts to the Neuse River basin protected riparian buffers per 15A NCAC 2B.0233(2). The application and supporting documentation provides adequate assurance that the proposed work will not result in a violation of applicable Water Quality Standards and discharge guidelines. Therefore, the State of North Carolina certifies that this activity will not violate the applicable portions of Sections 301, 302, 303, 306, 307 of PL 92 -500 and PL 95 -217 if conducted in accordance with the application, the supporting documentation, and conditions hereinafter set forth. This approval is only valid for the purpose and design submitted in the application materials and as described in the Public Notice. If the project is changed, prior to notification a new application for a new Certification is required. If the property is sold, the new owner must be given a copy of the Certification and approval letter and is thereby responsible for complying with all conditions of this Certification. Any new owner must notify the Division and request the Certification be issued in their name. Should wetland or stream fill be requested in the future, additional compensatory mitigation may be required as described in 15A NCAC 2H .0506 (h) (6) and (7). If any plan revisions from the approved site plan result in a change in stream or wetland impact or an increase in impervious surfaces, the DWQ shall be notified in writing and a new application for 401 Certification may be required. For this approval to be valid, compliance with the conditions listed below is required. Conditions of Certification: 1. Impacts Approved The following impacts are hereby approved as long as all of the other specific and general conditions of this Certification (or Isolated Wetland Permit) are met. No other impacts are approved including incidental impacts: Type of Impact Amount Approved nits Plan Location or Reference 404/Wetlands 0.122 acres - permanent Application and Public Notice 404/Wetlands 0.005 acres temporary 'Lemporary Application and Public Notice Stream - perennial 868 linear feet - permanent Application and Public Notice Stream - perennial 160 linear feet - temporary Application and Public Notice Stream - intermittent 416 linear feet - permanent Application and Public Notice Stream - intermittent 60 linear feet - temporary Application and Public Notice Buffers Zone I 79,584 (square ft. Application and Public Notice Suffers Zone 2 39,603 (square ft. ) Application and Public Notice Ms. Rebecca Flowers and River Dell Company, Inc. Page 3 of 6 March 15, 2010 Sediment and Erosion Control: 2. Erosion and sediment control practices must be in full compliance with all specifications governing the proper design, installation and operation and maintenance of such Best Management Practices in order to protect surface waters standards: a. The erosion and sediment control measures for the project must be designed, installed, operated, and maintained in accordance with the most recent version of the North Carolina Sediment and Erosion Control Planning and Design Manual. b. The design, installation, operation, and maintenance of the sediment and erosion control measures must be such that they equal, or exceed, the requirements specified in the most recent version of the North Carolina Sediment and Erosion Control Manual. The devices shall be maintained on all construction sites, borrow sites, and waste pile (spoil) projects, including contractor -owned or leased borrow pits associated with the project. c. Sufficient materials required for stabilization and/or repair of erosion control measures and stormwater routing and treatment shall be on site at all times. 3. No waste, spoil, solids, or fill of any kind shall occur in wetlands, waters, or riparian areas beyond the footprint of the impacts depicted in the 404/401 Permit Application. All construction activities, including the design, installation, operation, and maintenance of sediment and erosion control Best Management Practices, shall be performed so that no violations of state water quality standards, statutes, or rules occur; 4. Sediment and erosion control measures shall not be placed in wetlands or waters without prior approval from the Division. If placement of sediment and erosion control devices in wetlands and waters is unavoidable, design and placement of temporary erosion control measures shall not be conducted in a manner that may result in dis- equilibrium of wetlands or stream beds or banks, adjacent to or upstream and down stream of the above structures. All sediment and erosion control devices shall be removed and the natural grade restored within two (2) months of the date that the Division of Land Resources or locally delegated program has released the project; 5. Protective Fencing - The outside buffer, wetland or water boundary and along the construction corridor within these boundaries approved under this authorization shall be clearly marked with orange warning fencing (or similar high visibility material) for the areas that have been approved to infringe within the buffer, wetland or water prior to any land disturbing activities to ensure compliance with 15A NCAC 213 .0233; Continuing Compliance: 6. Ms. Rebecca Flowers and River Dell, shall conduct construction activities in a manner consistent with State water quality standards (including any requirements resulting from compliance with section 303(d) of the Clean Water Act) and any other appropriate requirements of State law and federal law. If the Division determines that such standards or laws are not being met (including the failure to sustain a designated or achieved use) or that State or federal law is being violated, or that further conditions are necessary to assure compliance, the Division may reevaluate and modify this Certification to include conditions appropriate to assure compliance with such standards and requirements in accordance with 15A NCAC 2H.0507(d). Before modifying the Certification, the Division shall notify Ms. Rebecca Flowers and River Dell Company, Inc., and the US Army Corps of Engineers, provide public notice in accordance with 15A NCAC 2H.0503 and provide opportunity for public hearing in accordance with 15A NCAC 2H.0504. Any new or revised conditions shall be provided to Ms. Rebecca Flowers and River Dell Company, Inc., in writing, shall be provided to the United States Army Corps of Engineers for reference in any Permit issued pursuant to Section 404 of the Clean Water Act, and shall also become conditions of the 404 Permit for the project; Ms. Rebecca Flowers and River Dell Company, Inc. Page 4 of 6 March 15, 2010 7. Deed notifications or similar mechanisms shall be placed on all lots with remaining jurisdictional wetlands and waters or areas within 50 feet of all streams and ponds. A sample deed notification format can be downloaded from the 401/Wetlands Unit web site at: htt://portal ncdenr org/c /document library /eet fle?uuid=ef84d0e1-5fc9- 4183 -8765- 2f9d7eb152e0 &groupld =38364 DWQ shall be sent copies of all deed restrictions applied to these lots after recordation; 8. Construction Stormwater Permit NCGO 10000 Upon the approval of an Erosion and Sedimentation Control Plan issued by the Division of Land Resources (DLR) or a DLR delegated local erosion and sedimentation control program, an NPDES General stormwater permit (NCG010000) administered by DWQ is automatically issued to the project. This General Permit allows stormwater to be discharged during land disturbing construction activities as stipulated by conditions in the permit. If your project is covered by this permit [applicable to construction projects that disturb one (1) or more acres], full compliance with permit conditions including the sedimentation control plan, self - monitoring, record keeping and reporting requirements are required. A copy of this permit and monitoring report forms may be found at htt n ://h2o.enr.state.nc.us/su/Forms Documents.htm.; 9. A final, written stormwater management plan for each phase of this project shall be submitted to the DWQ 401 bversight/Express Permitting Unit (2321 Crabtree Boulevard, Suite 250, Raleigh, NC 27604) for review and approval. No land disturbance associated with any phase may be conducted until a stormwater management plan for that phase has been submitted to and approved by the DWQ. No buildings associated with any phase may be occupied until the stormwater management plan is constructed and operational for that phase. In order to be approved by the DWQ, the stormwater management plan submittal must include a AMP Supplement Form with all required items. The BMPs must be designed such that they comply with the version of the NC DENR Stormwater BMP Manual that is in effect on the date of the submittal of the stormwater management plan (SMP). The SMP must meet the requirements in the version of SMP Regulations for non -DOT in effect at the time of submittal. Mitigation: 10. Compensatory Mitigation Using the Ecosystem Enhancement Program (EEP) and Conservation Easements Per the USACE, the following condition applies: In order to compensate for 0.122 acre of permanent impacts to wetlands, 0.005 acre of temporary impacts to wetlands, 868 linear feet of permanent impacts to streams, and 220 linear feet of temporary impacts to streams the permittee shall make payment to the North Carolina Ecosystem Enhancement Program (NC EEP) in the amount determined by the NCEEP, sufficient to perform the restoration of 0.214 acre of non - riparian wetland and 868 linear feet of warm water stream in the Neuse River Basin, Cataloging Unit 03020201. Construction within Jurisdictional areas`on the property shall begin only after the permittee has made payments per the below mitigation table to the NCEEP and provided a written confirmation to the Corps that it agrees to accept responsibility for the mitigation work required, in compliance with the MOU between North Carolina Department of Environment and Natural Resources and the United States Army Corps of Engineers, Wilmington District, dated November 4, 1998. Ms. Rebecca Flowers and River Dell Company, Inc. Page 5 of 6 March 15, 2010 The applicant will make phased mitigation payments to the NCEEP as listed in the table below. The cost of credits will be the current price at the time of payment, not the current price at the time the permit was issued. No work on any phase of the project shall begin until the payment for that phase has been issued to the NCEEP. Phase Number Impact Areas Mitigation Required Construction/Mitigation Payment Deadline 150 LF of stream 1 1 12/31/2012 2 2 115 LF of stream 12/31/2015 98 LF of stream & 0.019 acres of 3 5, 12, 18, and 19 wetland (Ali wetland mitigation paid 12/31/2019 under the EEP '/4 acre minimum 4 3 150 LF of stream 12/3112021 5 6, 7, 8, 13, and 14 295 LF of stream 12/31/2025 6 11, 16, 17 60 LF of stream & 0.007 acres of 12/31/2027 wetland wetland paid with phase 3 7 9, 10 0.096 acres of wetland 12131/2029 aid with phase 3 In addition to the mitigation outlined above, the permittee shall also preserve 5,839 linear feet of Mill Creek with a 100 ft, undisturbed riparian buffer (13.67 acres) along the east side of Mill Creek, and shall preserve 1,543 linear feet of an unnamed tributary (UT) to Mill Creek with a full 50 ft. undisturbed riparian buffer (2.44 acres) along each side of the UT to Mill Creek by means of Declaration of Restrictions. The Declaration of Restrictions shall be identical to the model Declaration of Restrictions found on the USACE Wilmington District website, unless changes are authorized in writing by the Wilmington District. The Declaration of Restrictions shall be recorded at the Register of Deeds office within 90 days of the issuance of the 404 Individual Permit, and a copy of the recorded Declaration shall be provided to the Wilmington District and the DWQ within 30 days of its recordation. The permittee shall take no action inconsistent with the terms of the Declaration before its recordation. 11. Certificate of Completion Upon completion of all work approved within the 401 Water Quality Certification or applicable Buffer Rules, and any subsequent modifications, the applicant is required to return the attached certificate of completion to the 401 Oversight/Express Review Permitting Unit, North Carolina Division of Water Quality, 1650 Mail Service Center, Raleigh, NC, 27699 -1650. Also, this approval to proceed with your proposed impacts or to conduct impacts to waters as depicted in your application shall expire upon expiration of the 404 or CAMA Permit. If you wish to contest any statement in the attached Certification you inust file a petition for an administrative hearing. You may obtain the petition form from the office of Administrative hearings. You must file the petition with the office of Administrative Hearings within thirty (30) days of receipt of this notice. A petition is considered filed when it is received in the office of Administrative Hearings during normal office hours. The Office of Administrative Hearings accepts filings Monday through Friday between the hours of 8:OOam and 5:OOpm, except for official state holidays. The original and one (1) copy of the petition must be filed with the Office of Administrative Hearings. Ms. Rebecca Flowers and River Dell Company, Inc. Page 6 of 6 March 15, 2010 The petition may be faxed - provided the original and one copy of the document is received by the Office of Administrative Hearings within five (5) business days following the faxed transmission. The mailing address for the Office of Administrative Hearings is: Office of Administrative Hearings 6714 Mail Service Center Raleigh, NC 27699 -6714 Telephone: (919 )-733 -2698, Facsimile: (919 )-733 -3478 A copy of the petition must also be served on DENR as follows: Ms. Mary Penny Thompson, General Counsel Department of Environment and Natural Resources 1601 Mail Service Center Raleigh, NC 27699 -1601 This the 15`h day of March 2010 D O N N OF WATE ALITY oleen H. Sullins CHS /ijm 3766 r-- t PEE U CHA ` E� --- CREEK CENTERUNE-x �r r j 9E 1 /1/ F R M NIAL/ STREA M ® ZONE 1 IMPACT A25-00 SF ® ZONE 2 IMPACT 4192 SF STOCKS ENGINEERING, P.A. ]Aa{ #m1.21ROUg1 Sr FM1IONF7 (Y' i1 !il -2NO 1100 EASIEAR A�fl1UE PRORC� �459 -4118 SLiE 450 FAX h 681 -5110 MA511MA1E KC 87454 FAX (y40.4117 RAILICII N.0 94W G ~ ?t-100 �6RCP's 0 0e-r3ECl ZONE y__ SCALE: 1 " = 50• 0 50 100 125 150 FLOWERS CROSSINGS PERMITTING JOHNSTON COUNTY, NC IC-01A CROSSING #1- DETAILED SITE PLAN 07118/08 280 270 260 25C 24C �i ... I- ljlju. K 23. .3 cri^__ o rn _ : "1: _' : ' __K . 22:46: - -_— _ : - __ _ n (D - , _. - -• -- -'- �� � _ ._.. _ - _ .. _. _ . ter..: '- -_: �.:. -; --- Jo .Rc 26 +00 28 +00 30 +00 1 CROSSING #1 PROFILE t JIB SCALE: VORTZ : i"= 100, G RD. 2' ACSC S9.58 GRADE POINT 4' B% _ 27� —29� B' CAB I1 v SUBGRAJ N 100 LF — DOUBLE 60' RCP's Z80 270 260 250 240 PIPE BURLED 1' BELOW Z TYPICAL SECTION BED OF STREAM C -01 B SCALE: N.T.S. STOCKS ENGINEERING, P.A. FLOWERS CROSSINGS PERMITTING JOHNSTON COUNTY, NC n" WISS.OUM ST. PFA� pm ) W -a u s-noe C -01B "' °' "__ "'"� ° r¢ ss �Mt c " � CROSSING #1- DETAILS SO 230 07/18/08 ZONE 1 BUFFER LIM I ZONE 2 BUFFER LINT 111. CRl V � I E I I / N l / l l •� CE U I I I o,�/ / I TOB EGI 11 L ON BUFF N1 3, 4 pCK T ) ll �� l � ` rte. s1V • • , I - _- Rttil- AiF.L� 7 I I -TEM NN[" —tMT� I I I l C,4 CN14 �"� • ' J' • / c�' Ot 1 BUFFER LIM�T \ \ / { \ / ON 2 1BUF R I M IT�, l CENTE,,RLINE IMPORTAIRT WTERAENT SI;zE M-;- ® ZONE 1 IMPACT 8633 SF SCALE: I" - 50' ® ZONE 2 IMPACT 3699 SF o so Boa 125 Aso STOCKS ENGINEERING, P.A. FLOWERS CROSSINGS PERMITTING 3W NrtMMOUGH ST. FNO „„ �,_ 3100 EUMN AMXK C ((u�� „�„96 JOHNSTON COUNTY, NC C -03A seic vo FA70 (hio) a3h3310 NASNNLLfi NA 37036 FA70 C+s�7 ar-eiw "�` 1C707 CROSSING #3 - DETAILED SITE PLAN 07118/08 290 280 270 260 250 I -ron not 20+00 22+00 24+00 CROSSING #3 PROFILE M 0 SCALE: HORIZ.: 1"=100' �VERT.: 1 " =10' RD. 2" ACSC S9.5B GRADE POINT J—X comp SUBGff 110 LF — 42" RC? all" 280 270 Out I] 250 LPiPE BURIED 8.5-13MOW ( 2 )1 TYPICAL SECTION BED OF STREAM �C--JOM SCALE: N.T.S. STOCKS ENGINEERING, P.A. FLOWERS CROSS'NGS PERM'TT'MG 3W HLLSBOMOM ST. FMM IW94nl-2W 1100 EASIM A%9M P"Q M 439-DIN JOHNSTON COUNTY, NC C-03B mm no FA)U (I 1-=10 MAM'AuE. M.L IM56 FAA (262) 43*--0107 UMCK Mr 27W GROSSING #3 — DETAILS 07118108 1�mpmm - ----- - --- 4& II II . . . . . . . . . . . j,� 20+00 22+00 24+00 CROSSING #3 PROFILE M 0 SCALE: HORIZ.: 1"=100' �VERT.: 1 " =10' RD. 2" ACSC S9.5B GRADE POINT J—X comp SUBGff 110 LF — 42" RC? all" 280 270 Out I] 250 LPiPE BURIED 8.5-13MOW ( 2 )1 TYPICAL SECTION BED OF STREAM �C--JOM SCALE: N.T.S. STOCKS ENGINEERING, P.A. FLOWERS CROSS'NGS PERM'TT'MG 3W HLLSBOMOM ST. FMM IW94nl-2W 1100 EASIM A%9M P"Q M 439-DIN JOHNSTON COUNTY, NC C-03B mm no FA)U (I 1-=10 MAM'AuE. M.L IM56 FAA (262) 43*--0107 UMCK Mr 27W GROSSING #3 — DETAILS 07118108 N W E* BURDETTE LAND CONSULTING, INC. 10212 Creedmoor Road - Raleigh, North Carolina 27615 Telephone (919) 841 -9977 — Fax (919) 841 -9909 S AGENT AUTHORIZATION FORM US Army Corps of Engineers Raleigh Regulatory Field Office 3331 Heritage Trade Drive, Suite 105 Wake Forest, North Carolina 27587 To Whom It May Concern: North Carolina Division of Water Quality Central Office Mail Service Center 1650 Raleigh, North Carolina 27699 By signing below, the current property owner gives representatives of Burdette Land Consulting, Inc. permission to act as their authorized agent for jurisdictional and isolated waters and riparian buffer determinations, delineation, and permitting for the subject project. This authorization includes permission to enter the site to conduct site meetings with US Army Corps of Engineers and NC Division of Water Quality personnel, as necessary. Project Name: Peachtree Phase Two BLC Project #: 11362 Parcel Identification Number(s): 169900 -14 -0825 Parcel Address(es): Peachtree Lane Parcel Acreage: 20.35 Current Property Owner or Easement Holder: Name: Lennar Carolinas. LLC (include contact person if a corporation, partnership, or government) Mailing Address: 909 Aviation Pkwy, Ste 700 Morrisville, NC 27560 -6632 Telephone: (Gl Ill ) .331 — 0211 Email: tYis1A whyiar tov\- Signature Date I A. . Sitework Calculat Flowers Plantation Peachtree Phase 2 "Owner/Developer rolinas,.L -Lenn'ar,Ca' LC' 1201 Edwards Mill Road,` - Raleigh; NC 276,07` Owner Contact: Mr.� Karl, Beyer (919)'865 1687 %% NA CARC) % c-:) STOCKS ENGINEERING P.A. 1100 Eastern avenue Phone: 252.459.8196 PO Box 1108 Fax: 252.459.8197 Nashville, NC 27856 Mobile: 252.903.6891 Email: mstocks@stocksengineering.com Stocks Engineering, P.A. 1100 Eastern Avenue PO Box 1108 Nashville, NC 27856 Project: Peachtree Phase II Date: August 24, 20011 Page: 1 of 1 Post - Development Tic Area ID Area (Ac.) C 11 -inch Q 1 -inch (cfs) 5 la 1.75 058 1 1.02 6 Ib 023 0.95 1 022 7 IC 0.07 0.95 1 007 8 Id 028 0.78 1 0.22 5 I Ia 0.26 0.74 1 0 19 5 IIIa 0.44 0.69 1 030 5 Na 1 17 064 1 0.75 - Total 4.20 - 1.00 2.76 Post- Development Tic Area ID Area (Ac.) C 12 Q2 (cfs) 5 la 1.75 0.58 5.58 566 6 Ib 023 095 5.58 1 22 7 IC 007 095 5 58 0.37 8 Id 028 078 5.58 1.22 5 Ila 026 074 558 1.07 5 Illa 0.44 069 558 1 69 5 IVa 1 17 064 558 4.18 - Total 4.20 - 5.58 15.42 Runoff Computations 1 Inch Storm 2 -Year Storm Stocks Engineering, P.A. 1100 Eastern Avenue PO Box 1108 Nashville, NC 27856 Post - Development Tc Area ID Area (Ac.) C 110 Q10 (cfs) 5 la 1.75 0.58 708 7.19 6 lb 0.23 095 7.08 1.55 7 IC 0.07- 095 7.08 0.47 8 Id 0.28 078 7.08 1.55 5 Ila 0.26 0.74 7.08 136 5 Illa 044 0.69 708 2.15 5 Na 1.17 064 7.08 530 E- Total 4.20 - 7.08 19.56 4 Post - Development Tic Area ID Area (Ac.) C 125 Q25 (cfs) 5 la 1.75 058 7.78 7.90 6 lb 0.23 0.95 7.78 170 7 Ic 0.07 0.95 7.78 052 8 Id 0.28 078 7.78 1.70 5 Ila 0.26 0.74 7.78 1.50 5 Illa 044 0.69 778 2.36 5 Iva 1.17 0.64 7.78 583 - Total 4.20 - 7.78 21.50 Runoff Computations 10 -Year Storm 25 -Year Storm e_ L. O L 0 N N 00 O N fA N C J O Z E m 3 col Z f _'' u. U O O d. Page 1 Line Line ID Flow Line Line Invert Invert Line HGL HGL Minor HGL Dns No. rate size length EL Dn EL Up slope down up loss Junct line (cfs) (in) (ft) (ft) (ft) N (ft) (ft) (ft) (ft) No. 1 FES to J610 1 36 15 c 460 231 50 231 60 0 217 23209 232 19 006 23225 End 2 JB10 to C139 1 36 15 c 1300 231 70 24535 10 500 23232 24582 n/a 246 01 i 1 Project File New stm Number of lines 2 Run Date 08 -26 -2011 NOTES c = cir, e = ellip, b = box, Return period = 10 Yrs , i - Inlet control Hydraflow Storm Sewers 2005 , \ a � � � � � � � � � � � � .� � � � � � � V � � � � � � I @ F 0 S G d0 / § w 2 o c / L) I o c � ) § / & 2 — o c �> ]$/ m § R $ N N 7a) 0 / 0 0 E > \ m < CD q ~ \ / ] § @ / 0 0 E / § \ �> 2 N ?)/ N a B 4 S g § \ \ / § / § C § � 0 2 §]E \ \ w � — 2 g >W 0 0 0 0 E > k Cl) § k / \ / \ 0 £ [ / \ § / §]E § § _�— CO - g § S / \ \ / / E \ 0 2 R @ ® 70 } a \ \ 2 » ] $ \ / } C \ \ ! za ;n0 Z :U L ink 6L L 11 jn— -- -- - _ r O r LO N r w w- O .0 O 0 r R d LO ti O LO LO N O I I I O O O O O O CD co OL O O CD O LO co N L N co N N N N N N N O O r O r LO N r w w- O .0 O 0 r R d LO ti O LO LO N O n V N N Q) N n 0 3 0 ICU a T I I I I I O O O O O O > d (D N co N L N N M N N N W n V N N Q) N n 0 3 0 ICU a T O 0 0 N N N 3 N E `o 3 0 `m x T T O N O N 00 O T J O Z k� r N d N s CL d a� L s CL 0 0 N N N 3 N E `o 3 0 `m x Page 1 Line No. Line ID Flow rate (cfs) Line size (in) Line length (ft) Invert EL Dn (ft) Invert EL Up (ft) Line slope N HGL down (ft) HGL up (ft) Minor loss (ft) HGL Junct (ft) Dns line No. 1 CB 11 to FES 530 15 c 620 21800 23067 20 435 21892 231 59 n/a 232 34 i End Peachtree Phase 2 Number of Imes 1 Run Date 08 -26 -2011 NOTES c = cir, e = elllp, b = box; Return period = 10 Yrs , I - Inlet control Hydraflow Storm Sewers 2005 m a Y/ em 4-0 CL E u W i em v� W Lm L O y N f9 _C O C Q °O Y v .- 0 T N O) N _ C t6 �p N 1 O W — " c 00 O s U > �-.� m atno m c � C 7 � S U) a v O C J > O O W N Cl) N i d O R > C LO � O n Q) N Q N O E 7 t x Z N O o O J > 0) 2 d Cl) N r- C d M — N C J O CN N o J > rn M M d � O) W a) N �a) OV O E � � > n LO f6 M �1 C O) 0 Q V O � t CL N � O J > C7 m N S d -- N O O C d — N t a CJ w O Cl) M O m d U N _C C/) LO GS d i N N d C f6 N O J d Z v N N n 0 n 0 m o` I ,7i; r N n N 0 d r ■ L. CL T O O 00'2Z'13 'PuJ!D Il ,alln O v °o o °o 0 0 °o m co o cri Q W N N N co N N N I I I I I gill �i I�I,I I i Ll�l ill i I � VII I o as ooa i* Lf c c O O O O O O O O O O n � p r � � � � p M M b O � O u ( I 1 O O O O O N In0 : u c O C) L d O O ON co O O N I I I I I gill �i I�I,I I i Ll�l ill i I � VII I o as ooa i* vs \V vvAvi Eu� d T T O — N N 00 O T N N C J O Z N N t0 t a m as L U d 0. Page 1 Line No. Line ID Flow rate (cfs) Line size (in) Line length (ft) Invert EL Dn (ft) Invert EL Up (ft) Line slope N HGL down (ft) HGL up (ft) Minor loss (ft) HGL Junct (ft) Dns line No. 1 FES to CB8 215 15 c 340 231 00 23587 14 324 231 59 23646 n/a 236 75 1 End Peachtree Phase 2 Number of lines 1 Run Date 08 -26 -2011 NOTES c = clr, e = elllp, b = box, Return period = 10 Yrs , I - Inlet control Hydraflow Storm Sewers 2005 d O f6 a V/ .— E O A� W v 0 L C O N � O C 3 a J y O v. E `c O Y O C N' O N N 3 v W co O d U > w U) m :� c o c c J > _ W m$ O 0 co N d N O z N O N in N C .... M O `J D Q N O � _ z a LO � o J Ur y .. O R N > N $ U CO — N C J $ p � M r.. fq o t6 J > � d � W as CO N N O N > O a0 N M C LO O Q V O � L Q LO 0 o rn = y co N O C N v N L a O w N N N m U N t a v C + 41 U y N y O CL z C N 00 N N Q N O H, 4- Q CL d E L. c A- C, 0 0 0 0 0 0 i In ct tt or) C'7 N N N N N N N 0 0 ( g 1 I 0 I o 3 { t i I 0 1 CD I i I ( ° m C) lnO L8'g£Z L6•Zt7Z 'I3 wl! J , I :ul - 00't7£ +0 elS o co I I I I I I ul 00' �£Z 'I3 'nul 1 I I 00•t7£Z 0 'PuJO € ' s IlepnO - 00'00 +0 ejS °o 00 W N f-� N N I N N N N W CL 0 e= N O O N d 3 m N E `o w 3 0 `m v` x O N O N O LO !A N C"`•J i � a c J T � Z �J Lin N d U! t CL m m L W+ U d a N O O N d 3 m N E `o w 3 0 `m v` x Storm Sewer r Report Page 1 Line Line ID Flow Line Line Invert Invert Line HGL HGL Minor HGL Dns No. rate size length EL Dn EL Up slope down up loss Junct line (cfs) (in) (ft) (ft) (ft) M (ft) (ft) (ft) (ft) No. 1 FES1 to JB2 1076 24 c 380 24600 24611 0 289 24746 24757 n/a 247 61 t End 2 JB2 to C133 1076 24 c 1630 24621 246.70 0 301 24765 24814 n/a 248 22 t 1 3 C63 to CB4 921 24 c 700 24676 246,97 0 300 24822 24835 037 248.72 2 4 C64 to C135 874 18 c 2780 24707 24790 0 299 248 72* 250 65* 057 251 22 3 5 C65 to CB6 719 15 c 200 24800 24806 0 300 251 22* 25147* 053 25200 4 i i Peachtree Phase 2 Number of lines 5 Run Date 08 -26 -2011 NOTES c = clr, e = ellip, b = box, Return period = 10 Yrs , *Surcharged (HGL above crown) , t - Inlet control Hydraflow Storm Sewers 2005 d O a O o Ls CL E 0 o ®ee La ^+ W L Lm c C O N tl- M c C N ca c0 Cl) LO LO � °o a` E ` -�i O Y rn LO U') LO U O O r r r O j > O) N LIO � (O N N (O i C N' O N N V W O" Oi O O O d L O M O C C O O r cl O M O C w OF c6 c6 N (OO N C C O O J > 0 a) 0000 V COO O O W a) r- CO o0 N V N 'T N V N to N to N OM N M LO d O M O O O O LO 47 N r- Cl) V 'IT c0 O LO O CD W C m It LO Q O N (a tJ C' V _ M tl- N Q .N, N N N r r t Z C_ C, v v M O LO N ❑ r .- r r J > Leo M ((O V _ tl- co 00 O 'T N Nr N V N LO N LO N a)> r r, O) m O d -. N N N N N O M O 00 O J M r N N (l� a (6 N N CD N C G O O r > r- 0) V Or n .-. Q) N W am v v v v tip N N N N N L. Cl) M N co LO O O O O O M v O t-- Lo O co 00 E ' V V Cl) tO C M tS V R V r-- Cl) 30 Q N N N r ❑ C' V V '7 LO N J> R (O N n N 2 d h t` co V o0 N N N N N N N N N O _ d > O N O O C d "t V a V OV w N N N N N c6 L C7 y (4 h (D t.- 7 (T N Q (�) O O N N 0 t E N (n = C V co LO IL d `7 Z N N N y t d U d N d C O Z 3 N 0 w cn Q) d ai w d W a— O L L CO E O -W cn Ln I� 1 0 0 N N 3 a� E 0 3 O rr N 'O 0 0 0 0 0 0 0 ` 1- O (D m v � I v N N N N N N p O ln0 90 9bZ '13 'AUI po�0 &Q t!fg LL L9Z 13 wia ti Ul - 00 64 +9 eIS "' 0 LO0 0 u-� v 0 0 v 0 LO Cl) i+ w t O V d UI LO L17Z 13 nut Cl) }n0 L6 9bZ 13 AUI LO Z9Z 13 wia £ Ul - 00 LL +Z LIS 0 LO N UI 9L 917Z 13 AUI ;n0 OL'917Z 13 AUI 90 LR 13 wia p Z Ul - 00 LO +Z EIS 0 N 0 LO O O UI LZ 917Z 13 nU1 }n0 L L 917Z '13 AUI o 00 13 wli l LO 009Z L UI100 1, -d Sul 00 6tiZ 13 PUJJ 11spnO - 00 00 +0 ejS ++ °0 00 o p o0 00 00 v O O N N N LO LO co N N N N _d LLI Ln I� 1 0 0 N N 3 a� E 0 3 O rr N 'O 0 0 N N 3 a� E 0 3 O rr N 'O o i = i E r I LL C o . cg, o 44t, = • Sc i LS -VFS Design Forebay surface area 135 sq ft Forebay is adequately sized Depth of Forebay at stormwater entry point 18 in Depth is appropriate Depth of forebay at stormwater exit point 6 in Depth is appropriate Feet of level lip needed per cfs 10 ft/cfs Computed minimum length of the level lip needed 17 ft Length of level lip provided 17 ft Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 1 of 3 y� u+ NCDEHR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER - VEGETATED FILTER STRIP (LS -VFS) SUPPLEMENT This form must be completely filled out, printed, initialed, and submitted. I. PROJECT INFORMATION Project name Peachtree Phase 2 Contact name Kevin Varnell Phone number 252 459.8196 Date June 28, 2012 Drainage area number 7 II. DESIGN INFORMATION The purpose of the LS -VFS Buffer Rule- Diffuse Flow Stormwater enters LS -VFS from The drainage area Type of VFS Engineered filter strip (graded & sodded, slope < 8 %) Explanation of any "Other" responses above If Stormwater Enters the LS -VFS from the Drainage Area Drainage area 77,493 ftZ Impervious surface area 65,493 ftZ Percent impervious 84.51 % Rational C coefficient 0.95 Peak flow from the 1 in /hr storm 169 cfs Time of concentration 5.00 min Rainfall intensity, 10 -yr storm 6.97 in/hr Peak flow from the 10 -yr storm 1178 cfs Design storm 1 inch /hour storm Maximum amount of flow directed to the LS -VFS 169 cfs Is a flow bypass system going to be used? Y (Y or N) Explanation of any "Other" responses above If Stormwater Enters the LS -VFS from a BMP Do not complete this section of the form Type of BMP Pick one. Peak discharge from the BMP during the design storm cfs Peak discharge from the BMP during the 10 -year storm cfs Do not complete this section of the form Maximum capacity of a 100 -foot long LS -VFS 10 cfs Peak flow directed to the LS -VFS cfs Do not complete this section of the form Is a flow bypass system going to be used? (Y or N) Explanation of any "Other" responses above LS -VFS Design Forebay surface area 135 sq ft Forebay is adequately sized Depth of Forebay at stormwater entry point 18 in Depth is appropriate Depth of forebay at stormwater exit point 6 in Depth is appropriate Feet of level lip needed per cfs 10 ft/cfs Computed minimum length of the level lip needed 17 ft Length of level lip provided 17 ft Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 1 of 3 Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS Slope (from level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector Swale at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below) M B W y (flow depth for 10 -year storm) freeboard (during the 10 -year storm) Peak velocity in the channel during the 10 -yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any "Other" responses above 30 ft 24598 fmsl 24500 fmsl 327 % N (Y or N) N (Y or N) Y (Y or N) Y (Y or N) ft ft ft ft ft ft/sec Pick one N (Y or N) Y (Y or N) R' OK Please provide plan details of flow splitter & supporting calcs 1 B 1 Ili. REQUIRED ITEMS CHECKLIST EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Requried Item: Initials Page or plan sheet number and any notes: 1. Plans (1" - 50' or larger) of the entire site showing :;rjK✓ C -1,D -2 - Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Forebay (if applicable), High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), and Boundaries of drainage easement Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 2 of 3 2 Plan details (1" = 30' or larger) for the level spreader showing - Forebay (if applicable), High flow bypass system, One foot topo lines between the level lip and top of stream bank, Proposed drainage easement, and Design at ultimate build -out 3 Section view of the level spreader (1" = 20' or larger) showing - Underdrain system (if applicable), Level lip, Upslope channel, and Downslope filter fabric. 4. Plan details of the flow splitting device and supporting calculations (if applicable) 5. A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. 6 If a non - engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present. 7 The supporting calculations 8. A copy of the signed and notarized operation and maintenance (0 &M) agreement. Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 3 of 3 —�/�✓ D -2 NIA D -1 Engineered is being used See Calculations �✓ See 0 and M Agreement Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 3 of 3 If Stormwater Enters the LS -VFS from the Drainage Area Drainage area 7,579 Vd ATF90 Impervious surface area 7,579 ft, Percent impervious 100.00 % Rational C coefficient 095 ft NCDENR 0.17 cfs Time of concentration STORMWATER MANAGEMENT PERMIT APPLICATION FORM min Rainfall intensity, 10 -yr storm 401 CERTIFICATION APPLICATION FORM in /hr LEVEL SPREADER - VEGETATED FILTER STRIP (LS -VFS) SUPPLEMENT cfs Design storm This form must be completely filled out, printed, initialed, and submitted. I. PROJECT INFORMATION 115 cfs Project name Peachtree Phase 2 (Y or Contact name Kevin Varnell Phone number 252 459.8196 Date June 28, 2012 Drainage area number 8 II. DESIGN INFORMATION The purpose of the LS -VFS Buffer Rule- Diffuse Flow Stormwater enters LS -VFS from The drainage area Type of VFS Engineered filter strip (graded & sodded, slope < 8 %) Explanation of any "Other" responses above If Stormwater Enters the LS -VFS from the Drainage Area Drainage area 7,579 ft, Impervious surface area 7,579 ft, Percent impervious 100.00 % Rational C coefficient 095 ft Peak flow from the 1 in /hr storm 0.17 cfs Time of concentration 5.00 min Rainfall intensity, 10 -yr storm 6.97 in /hr Peak flow from the 10 -yr storm 115 cfs Design storm 10 -year storm Maximum amount of flow directed to the LS -VFS 115 cfs Is a flow bypass system going to be used? N (Y or Explanation of any "Other" responses above If Stormwater Enters the LS -VFS from a BMP Type of BMP Peak discharge from the BMP during the design storm Peak discharge from the BMP during the 10 -year storm Maximum capacity of a 100 -foot long LS -VFS Peak flow directed to the LS -VFS Is a flow bypass system going to be used? Explanation of any "Other" responses above LS -VFS Design Forebay surface area Depth of forebay at stormwater entry point Depth of forebay at stormwater exit point Feet of level lip needed per cfs Computed minimum length of the level lip needed Length of level lip provided Pick one Do not complete this section of the form cfs cfs Do not complete this section of the form 10 cfs cfs Do not complete this section of the form (Y or N) 16 sq ft 18 in 6 in 10 ft/cfs 12 ft 12 ft Forebay is adequately sized Depth is appropriate Depth is appropriate Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 1 of 3 Width of VFS 30 ft Elevation at downslope base of level lip 23440 fmsl Elevation at the end of the VFS that is farthest from the LS 232.00 fmsl Slope (from level lip to the end of the VFS) 800 % Are any draws present in the VFS? N (Y or N) Is there a collector swale at the end of the VFS? N (Y or N) Bypass System Design (if applicable) Is a bypass system provided? N (Y or N) Is there an engineered flow splitting device? N (Y or N) Dimensions of the channel (see diagram below)- M ft B ft W ft y (flow depth for 10 -year storm) ft freeboard (during the 10 -year storm) ft Peak velocity in the channel during the 10 -yr storm ft/sec Channel lining material Pick one, Does the bypass discharge through a wetland? (Y or N) Does the channel enter the stream at an angle? (Y or N) Explanation of any "Other" responses above OK �a 1 B 1 III. REQUIRED ITEMS CHECKLIST EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below If a requirement has not been met, attach justification. Requried Item: Initials 1. Plans (1" - 50' or larger) of the entire site showing :2!L/ - Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Forebay (if applicable), High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), and Boundaries of drainage easement rage or plan sneet numoer ana any notes: C -1, D -2 Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 2 of 3 2 Plan details (1" = 30' or larger) for the level spreader showing - Forebay (if applicable), High flow bypass system, One foot topo lines between the level lip and top of stream bank, Proposed drainage easement, and Design at ultimate build -out 3. Section view of the level spreader (1" = 20' or larger) showing - Underdrain system (if applicable), Level lip, Upslope channel, and Downslope filter fabric 4 Plan details of the flow splitting device and supporting calculations (if applicable) 5 A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized 6. If a non - engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present 7 The supporting calculations. 8 A copy of the signed and notarized operation and maintenance (0 &M) agreement. CJhJ D -2 -74/— D -2 NIA D -1 Engineered is being used J See Calculations � See 0 and M Agreement Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 3 of 3 7� 52 fO�F Y'd'A NC®ENR Depth of forebay at stormwater entry point 18 STORMWATER MANAGEMENT PERMIT APPLICATION FORM Depth is appropriate 401 CERTIFICATION APPLICATION FORM 6 LEVEL SPREADER - VEGETATED FILTER STRIP (LS -VFS) SUPPLEMENT Depth is appropriate This form must be completely filled out, printed, initialed, and submitted. 10 I. PROJECT INFORMATION Computed minimum length of the level lip needed Project name Peachtree Phase 2 Ten feet is the minimum level spreader length Contact name Kevin Varnell ft Phone number 252 459 8196 Date June 28, 2012 Drainage area number 9 II. DESIGN INFORMATION The purpose of the LS -VFS Buffer Rule Diffuse Flow Stormwater enters LS -VFS from The drainage area Type of VFS Engineered filter strip (graded & sodded, slope < 8 %) Explanation of any "Other" responses above If Stormwater Enters the LS -VFS from the Drainage Area Drainage area 29,054 ftz Impervious surface area 25,854 ftz Percent impervious 8899 Rational C coefficient 088 Peak flow from the 1 in /hr storm 059 cfs Time of concentration 500 min Rainfall intensity, 10 -yr storm 6.97 in /hr Peak flow from the 10 -yr storm 409 cfs Design storm 1 inch /hour storm Maximum amount of flow directed to the LS -VFS 0.59 cfs Is a flow bypass system going to be used? Y (Y or N) Explanation of any "Other" responses above If Stormwater Enters the LS -VFS from a BMP Do not complete this section of the form Type of BMP Pick one Peak discharge from the BMP during the design storm cfs Peak discharge from the BMP during the 10 -year storm cfs Do not complete this section of the form Maximum capacity of a 100 -foot long LS -VFS 10 cfs Peak flow directed to the LS -VFS cfs Do not complete this section of the form. Is a flow bypass system going to be used? (Y or N) Explanation of any "Other" responses above LS -VFS Design Forebay surface area 52 sq ft Forebay is adequately sized Depth of forebay at stormwater entry point 18 in Depth is appropriate Depth of forebay at stormwater exit point 6 in Depth is appropriate Feet of level lip needed per cfs 10 ft/cfs Computed minimum length of the level lip needed 6 ft Ten feet is the minimum level spreader length Length of level lip provided 10 ft Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 1 of 3 LTA ' j A 18,992 �pF Y. A'F5,0 r Impervious surface area 9,216 - NC ENR 48.53 % Rational C coefficient STORMWATER MANAGEMENT PERMIT APPLICATION FORM cfs Do not complete this section of the form. Peak flow from the 1 in/hr storm 401 CERTIFICATION APPLICATION FORM cfs LEVEL SPREADER - VEGETATED FILTER STRIP (LS -VFS) SUPPLEMENT min Rainfall intensity, 10 -yr storm This form must be completely filled out, printed, initialed, and submitted. in /hr I. PROJECT INFORMATION 194 cfs Project name Peachtree Phase 2 Contact name Kevin Varnell cfs Phone number 252,459.8196 (Y or Date June 28, 2012 Drainage area number 10 II. DESIGN INFORMATION The purpose of the LS -VFS Buffer Rule- Diffuse Flow Stormwater enters LS -VFS from The drainage area Type of VFS Engineered filter strip (graded & sodded, slope < 8 %) Explanation of any "Other" responses above If Stormwater Enters the LS -VFS from the Drainage Area Drainage area 18,992 ft, Impervious surface area 9,216 ftz Percent impervious 48.53 % Rational C coefficient 064 cfs Do not complete this section of the form. Peak flow from the 1 in/hr storm 028 cfs Time of concentration 5.00 min Rainfall intensity, 10 -yr storm 6.97 in /hr Peak flow from the 10 -yr storm 194 cfs Design storm 1 inch /hour storm Maximum amount of flow directed to the LS -VFS 028 cfs Is a flow bypass system going to be used? Y (Y or Explanation of any "Other" responses above If Stormwater Enters the LS -VFS from a BMP Do not complete this section of the form Type of BMP Pick one Peak discharge from the BMP during the design storm cfs Peak discharge from the BMP during the 10 -year storm cfs Do not complete this section of the form Maximum capacity of a 100 -foot long LS -VFS 10 cfs Peak flow directed to the LS -VFS cfs Do not complete this section of the form. Is a flow bypass system going to be used? (Y or N) Explanation of any "Other" responses above LS -VFS Design Forebay surface area 20 sq ft Forebay is adequately sized Depth of forebay at stormwater entry point 18 in Depth is appropriate Depth of forebay at stormwater exit point 6 in Depth is appropriate Feet of level lip needed per cfs 10 ft/cfs Computed minimum length of the level lip needed 3 ft Ten feet is the minimum level spreader length Length of level lip provided 10 ft Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 1 of 3 Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS Slope (from level lip to the end of the VFS) Are any draws present in the VFS? Is there a collector swale at the end of the VFS? Bypass System Design (if applicable) Is a bypass system provided? Is there an engineered flow splitting device? Dimensions of the channel (see diagram below) M B W y (flow depth for 10 -year storm) freeboard (during the 10 -year storm) Peak velocity in the channel during the 10 -yr storm Channel lining material Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any "Other" responses above 30 ft 23140 fmsl 22900 fmsl 800 % N (Y or N) N (Y or N) Y (Y or N) Y (Y or N) 3.00 ft 000 ft 1050 ft 0.39 ft 136 ft 066 fUsec Pick one. N (Y or N) Y (Y or N) NV OK Please provide plan details of flow splatter & supporting calcs 1 B 1 III. REQUIRED ITEMS CHECKLIST EDIT Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent may initial below. If a requirement has not been met, attach justification. Requried Item: 1 Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Forebay (if applicable), High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), and Boundaries of drainage easement Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 2 of 3 2 Plan details (1" = 30' or larger) for the level spreader showing. - Forebay (if applicable), High flow bypass system, One foot topo lines between the level lip and top of stream bank, Proposed drainage easement, and Design at ultimate build -out. 3 Section view of the level spreader (1" = 20' or larger) showing - Underdrain system (if applicable), Level lip, Upslope channel, and Downslope filter fabric 4 Plan details of the flow splitting device and supporting calculations (if applicable) 5. A construction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized 6 If a non - engineered VFS is being used, then provide a photograph of the VFS showing that no draws are present. 7. The supporting calculations. 8 A copy of the signed and notarized operation and maintenance (0 &M) agreement Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 3 of 3 D -2 ' r✓ D -2 IV I NIA D -1 Engineered is being used. See Calculations See 0 and M Agreement Form SW401 - LS -VFS - 29Nov2010 - Rev 8 page 3 of 3 Channel Report Hydraflow Express by Intelisolve Level Spreader 10 Bypass Channel Triangular Side Slopes (z:1) Total Depth (ft) Invert Elev (ft) Slope ( %) N -Value 3.00, 3.00 1.75 100.00 34.00 0.065 Calculations Compute by: Known Q Known Q (cfs) = 1.94 Elev (ft) 102 00 101.50 101 00 10050 10000 99.50 Monday, Jul 2 2012 Highlighted Depth (ft) = 0.39 Q (cfs) = 1.940 Area (sqft) = 0.46 Velocity (ft/s) = 4.25 Wetted Perim (ft) = 2.47 Crit Depth, Yc (ft) = 0.49 Top Width (ft) = 2.34 EGL (ft) = 0.67 Section 2 4 6 8 Reach (ft) 10 12 14 Depth (ft) 2.00 1.50 1 00 0.50 m -0 50 16 Stocks Engineering, P.A. 1100 Eastern Avenue PO Box 1108 Nashville, NC 27856 Project: Pipe Calcs Peachtree Ph II Date: June 24, 2012 Page: 1 of 1 Post - Development Post - Development Tic Area ID Area (Ac.) C 110 Q10 (cfs) 5 la 008 095 708 054 5 lb 008 095 708 054 5 IC 022 095 708 147 5 Id 140 078 708 773 5 Ila 311 095 708 2092 5 Isla 056 064 708 254 5 IVa 1 33 088 708 829 - Total 6.78 - 7.08 42.02 Post - Development Tic Area ID Area (Ac.) C 125 Q25 (cfs) 5 la 008 095 778 059 5 lb 008 095 778 059 5 IC 022 095 778 1 62 5 Id 140 078 778 850 5 Ila 311 095 778 2299 5 Illa 056 064 778 279 5 IVa 1.33 088 778 9.11 - Total 6.78 - 7.78 46.18 Runoff Computations 2 -Year Storm 10 -Year Storm 25 -Year Storm Skimmer Sediment Basin Worksheet (Drainage Area Must be Less Than 10 Acres) Area Disturbed = Z - a Co Acres Runoff Area = Z. a CO Acres Qio = C x I x A =, 257- x L "t ?x _7.o�, _ 15-.a?, .cfs Basin Volume Calculation: Volume of-Sediment Ac.) x (1800 cf sed. /year) x (1 year) ?OR cf Assume _3— foot of basin depth, therefore area of the pit Square Feet Try ( wide) x ( long) x ( foot deep) Sediment Basin Surface Area Calculation: Surface Area (SF) = Qio x 325 sf /cfs J •a. x 325 sf /cfs sf Surface Area — Use (a wide) x (d long) x ( 3_ foot deep) Sediment Basin - 7 ' Surface Area — C �_ Weir Desicin and Velocity ChecK: Qio = SFo' cfs; Q = CLH3i2; H = [Q /CL]211 57, a (2.68)( (0 213 0.'3'2-- feet Velocity Check ( rJ �/( f� ) ( , 37Z _ /. �' fps, OK v' cz Skimmer Sediment Basin Worksheet (Drainage Area 1vlust be Less Than 10 Acres) Area Disturbed = ':�. Z^7 Acres Runoff Area = Acres Q10 =C x I x A = .x x_ _9,2'7 -7. '� °d. cfs Basin Volume Calculation: Volume of Sediment = ( -3. a% Ac.) x (1800 cf sed. /year) x (1 year) ,5980 cf Assume 3 foot of basin depth, therefore area of the pit _ Square Feet Try ( wide) x ( long) x ( Surface Area Calculation: Surface Area (SF) = Q10 x 325 sf /cfs 7 �S x 325 sf /cfs sf foot deep) Sediment Basin Surface Area — Use wide) x ( 7.7-- long) x ( , �; foot deep) Sediment Basin _ 2, (e-6 7, c:7,TL� Surface Area — a /G heir Design anael)cit�r ChecK: Q10 = . t cfs; Q = CLH112; H = [Q /CL]"' (2.68)( )l2/3 0.3 L� feet Velocity Check -77" ( 7.'/8 /( /5- ) ((p -2 I _ �,!'( fps, OK �,/ 7'kl---' 2- Skimmer Sediment Basin Worksheet (Drainage Area 1vlust be Less Than 10 Acres) Area Disturbed = 3. c!� 3 Acres Runoff Area =, ° Acres Qio= C x I x A = 35-x x -390 -J. Z. cfs Basin folume Calculation: Volume of Sediment = (Ac.) x (1800 cf sed. /year) x (1 year) SS `T cf Assume 3 foot of basin depth, therefore area of the pit Square Feet Try ( wide) x ( long) x ( Surface Area Calculation: Surface Area (SF) = Qio x 325 sf /cfs _ ` I. Z,% x 325 sf /cfs sf foot deep) Sediment Basin Surface Area - Use (` wide) x long) x ( foot deep) Sediment Basin Surface Area - o(G W eir Besic n anc ' ef)city ChecK: Q10 = I . Z'� cfs; Q = CLH3 /Z; H = [Q /CL]213 (2.68)( �a )12/3 • 14 feet Velocity Check -7 (` ,'�°°� �/( ) (c� . ; , _ (, 5"0 fps, OK V �' -J =� 2- Skimmer Sediment Basin Worksheet (Drainage Area Must be Less Than 10 Acres) Area Disturbed = 0, °, Acres Runoff Area = Acres Qio = C X I X A = 35- x. x _a,S9 Zt ! -cfs Basin Volume Calcf�lation: Volume of Sediment = _0- St Ac.) x (1800 cf sed. /year) x (1 year) cf Assume 3 foot of basin depth, therefore area of the pit Square Feet Try ( wide) x ( long) x ( foot deep) Sediment Basin Surface Area Calculation: Surface Area (SF) = Q10 x 325 sf /cfs _ x 325 sf /cfs sf Surface Area — Use ( (9 wide) x ( long) x ( _] foot deep) Sediment Basin -77—Z- 7 L?ql Surface Area — 0 C� We Devi nand e(acity CheGK: Q10 = _ ?• (S cfs; Q = CLH1 /2; H = [Q /CL]zis 6Cam," / (2 68)( )lzis = 0,3::� feet Velocity Check � ( , ( fps OK �f Skimmer Sediment Basin I /Verksheet (Drainage Area 1vlust be Less Than 10 Acres) Area Disturbed = /, d '3 Acres Runoff Area = /,63, Acres Q i o = C x I x A = _x.t7x Z' 5—( cfs Basin Voiuma r,aic,iation: Volume of Sediment = (_ /, 0 3 Ac.) x (I 80o cf sed. /year) x (1 year) /,SS`` cf M Assume 3 foot of basin depth, therefore area of the pit ,I Square Feet Try ( wide) x ( long) x ( foot deep) Sediment Basin Surface Aran (Imlr- ioafion: Surface Area (SF) = Q10 x 325 sf /cfs f x 325 sf /cfs _ - sf('!� sf ---- _� Surface Area — Use ( Z ( wide) x (�{_ long) x (_ foot deep) Sediment Basin Surface Area — Weir Design Snri Vefocity Check-: Q10 = -511 cfs; Q = CLH3/2; H = [Q /CL]213 (2.68)(, 5 )12 /3 U • 3 3 feet Velocity Check -7 (Z . �( �/( ) (_2.a -?'j _ ; , �"� fps, OK �/' Ou 1-F 'I C)Q, CO C O a E w CD CJ CO m CD c_ O C 2 L •av W L�L Ltd Vii°' L C J 7'✓ � . Us u r � Mme. 'TZE-�S,• C J 7'✓ � . Us u Fl 1' ID;J Mme. 'TZE-�S,• Fl 1' ID;J _J 0 q a E W O r U r � CC) o c z w ,D L? �Zw CCU) L-E-T oQ Usk Fly 1Je� Q. p U" vl� 1 ` Mir.), i t-; U`�� r ✓S jam);? <ic�? O,JeFg- X112$$- `) J. JDN !' JP., .7. -5-1 111, K -ryo�W �.1 _ s / `✓50 -;k, U�- F (f�.s s �; k I D S—, ovCP,� � 1 r F! !' �, J 2 -(/ 1 N . It Permit Number: (to be provided by DWQ) Drainage Area Number: Filter Strip, Restored Riparian Buffer and Level Spreader Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — Immediately after the filter strip is established, any newly planted vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — Once a year, the filter strip will be reseeded to maintain a dense growth of vegetation — Stable groundcover will be maintained in the drainage area to reduce the sediment load to the vegetation. — Two to three times a year, grass filter strips will be mowed and the clippings harvested to promote the growth of thick vegetation with optimum pollutant removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and may be allowed to grow as tall as 12 inches depending on aesthetic requirements (NIPC,1993). Forested filter strips do not require this type of maintenance. — Once a year, the soil will be aerated if necessary. — Once a year, soil pH will be tested and lime will be added if necessary. After the filter strip is established, it will be inspected quarterly and within 24 hours after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potential problem: How I will remediate the problem: The entire filter strip Trash /debris is present. Remove the trash /debris. system The flow splitter device The flow sputter device is Unclog the conveyance and dispose (if applicable) clogged. of any sediment off -site. The flow sputter device is Make any necessary repairs or damaged. replace if damage is too large for repair. Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O &M -Rev.3 Page 1 of 3 BMP element: Potential problenr How I will remediate the problem: The swale and the level The swale is clogged with Remove the sediment and dispose lip sediment. of it off -site. The level lip is cracked, Repair or replace lip. settled, undercut, eroded or otherwise damaged. There is erosion around the Regrade the soil to create a•berm end of the level spreader that that is higher than the level lip, and shows stormwater has then plant a ground cover and bypassed it. water until it is established. Provide lime and a one -time fertilizer application. Trees or shrubs have begun Remove them. to grow on the swale or just downslo a of the level lip. The bypass channel Areas of bare soil and /or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then reestablish proper erosion control. Turf reinforcement is Study the site to see if a larger damaged or ripap is rolling bypass channel is needed (enlarge if downhill. necessary). After this, reestablish the erosion control material. The filter strip Grass is too short or too long Maintain grass at a height of if applicable). a roximatel three to six inches. Areas of bare soil and /or Regrade the soil if necessary to erosive gullies have formed. remove the gully, and then plant a ground cover and water until it is established. Provide lime and a one -time fertilizer application. Sediment is building up on Remove the sediment and the filter strip. restabilize the soil with vegetation if necessary. Provide lime and a one- time fertilizer application. Plants are desiccated. Provide additional irrigation and fertilizer as needed. Plants are dead, diseased or Determine the source of the dying. problem: soils, hydrology, disease, etc. Remedy the problem and replace plants. Provide a one -time fertilizer application. ` Nuisance vegetation is Remove vegetation by hand if choking out desirable species. possible. If pesticide is used, do not allow it to get into the receiving water. The receiving water Erosion or other signs of Contact the NC Division of Water damage have occurred at the Quality local Regional Office, or the outlet. 401 Oversight Unit at 919 - 733 -1786. Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O &M -Rev.3 Page 2 of 3 s Permit Number: (to be provided by DWQ) I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project name: Peachtree Phase Two - Lennar Carolinas LLC BMP drainage area number: 7 - 10 Print name:` P�� (A A- l 1 �-V `J� Title: V %(L _ Pcesla -fi Z�� �0Address: 10 A1IG�l� -o" f94NL. qc �6o � Phone: C� i�l 3 i Signature: Date: 9 . -+ - Zo lz. Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I, va W'. 4 i ( , a Notary Public for the State of CaaLb K L, County of VJ a � � - , do hereby certify that PCt,'i1 t IIC-r 4L E- t4etKC Gt.e personally appeared before me this _ �', day of �k� , Z(,_Zand acknowledge the due execution of the forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements. Witness my hand and official seal, °���NuH. ,UO�'��,. NOTARY`� PUBLIC G` CrO U nil n,�r�� SEAL My commission expires —1-- n - —zb 15— Form SWU401 -Level Spreader, Filter Strip, Restored Riparian Buffer O &M -Rev.3 Page 3 of 3 - - - 1� - - - (D_,--� ! I- --- 11 / 0 - I _I " � � ­", "" N­_�" � . - ­___ �- �, i? _- s , , ,,4 I, _� \_' , . _­j I I ii_�itz I - I , 11, I 11� , ;, •­ - -) � ,­," - 1:: __1 � �,__ / use Buffer _,a - __� _, / - ,_.- 11 ______ �. _.. - I / 11 / ,! 111r`__.,/ " . " / ; I / I //­".,---- 1 , .11 , `�_SE- m _11 "" ­1 . . '. 11 / , - , �-� / � / /1 4, . ;/N//"3::A - . I 1 I" I I� — , - / ". I ­11- : , " I - I . - - , . / I I 111* \ " I "', I / I I" - "I •- - -,_�,, // / 45a, ) // / / I/ I ,- " , 'o I -1 - - . ..., / / / / )(/ ,� �i,;, I ------------____j � / , , / I , . I-,---- I __/ / , I , /,��. , I—, ,- ,� I / / I / X / /,/ / / " I I �._/,��' -- , './/// // / // //\Z/,/i. ,� -­�- ",_1 - : ,I/. '\, I �"_'/ / III 7 - �_ " - / / " / ..'f , -, �z I - ,-. Ile __ / I // / / I „.�, N,,- ,- - , . 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