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HomeMy WebLinkAbout20051701 Ver 1_More Info Received_20120417WITH ER'S &RAVENEL April 16 2012 Annette Lucas NCDENR DWQ Central Office 512 N Salisbury Street 9th Floor Raleigh NC 27602 RE Brighton Forest Subdivision — Phase 7B W &R No 2020179 70 Dear Annette ENGINEERS I PLANNERS I SURVEYORS 05- I'loI -�, ECEIVE APR 1 7 2012 Please find attached one (1) copy of the proposed storm drainage construction drawings for Brighton Forest Phase 7B Please note these construction drawings are currently being reviewed by Town of Fuquay Varina and Wake County Sedimentation and Erosion Control As we had previously done with Phase 66 we are forwarding plans for DWQ approval of the level spreader as shown on Sheets 4 and 7 of the attached plan The level spreader has been designed with an engineered filter strip and a bypass channel in accordance with current DWQ requirements Also attached are copies of the level spreader design supplement sheets from DWQ calculations regarding the proposed stormwater bypass channel and executed Operation and Maintenance Agreement for the level spreader in question Please note that this overall project has been slowed based on the economic conditions over the last several years and has been completely phased to smaller sections There is a 401 issued for this project dated October 28 2005 as DWQ project number 05 1701 The permitted wetlands impacts were completed within the permit time limitations Subsequent to that additional phases have been and will be developed that will discharge into adjacent Neuse River riparian buffer areas We have also attached a copy of the actual 401 Certification with the stormwater diffuse flow condition highlighted Please advise if you require additional information or have any questions concerning this request Sincerely WITHER &-RAVENEL, INC Nicholas J Antrilli PE cc Jack Monsey Brighton Forest Inc Neil Matthews Brighton Forest Inc Betsy Pearce Wake County Jennifer Mitchell Wake County DWQ Acknowledgement of Receipt By Date 111 MacKenan Drive I Cary NC 275111 tel 919 469 3340 1 fax 919 467 6008 1 www withersravenel com I License No C 0832 1410 Commonwealth Drive I Suite 1011 Wilmington NC 28403 1 tel 910 256 9277 1 fax 910 256 2584 7011 Albert Pick Road I Suite G I Greensboro NC 27409 1 tel 336 605 3009 1 fax 919 467 6008 Permit Number O � — l -1 O 1 (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 line 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 10 inch (or 15 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 splitter device is Unclog the conveyance and dispose (if applicable) clogged of any sediment off site The flow splitter 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 problem 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 line and a one time fertilizer application Trees or shrubs have begun Remove them to grow on the swale or lust 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 rollmg bypass channel is needed (enlarge if downhill necessary) After this reestablish the erosion control material The filter step Grass is too short or too long Maintain grass at a height of if applicable) approximately 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 fame fertilizer application Sediment is building up on Remove the sediment and the filter strip restabilize the soil with vegetation if necessary Provide lone 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 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 BRIGHTON FOREST SUBDIVISION PHASE VII B BMP drainage area number 1 Print name Thomas L Fonville, BRIGHTON FOREST, INC Title AGENT Addres Phone Signati Date f /v� Note The legally responsible parry 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 a Notary Public for the State of ly ov't� Cow* 1 %"°" County of W O-k-e- do hereby certify thatl� ow�aS k f. personally appeared before me this Tom` day of r t < -,)-0 1'>' and acknowledge the due execution of the forgoing filter strip riparian buffer and/or level spreader maintenance requirements Witness my hand and official seal IpO w►L BT� 4 �OTAgf N A�aL� v COL0 SEAL My commission expires 1{-•a5 -2-01 Form SWU401 Level Spreader Filter Strip Restored Riparian Buffer O &M Rev 3 Page 3 of 3 ��Aro ®� of WATpq , q WDENR ti 046 STORMWATER MANAGEMENT PERMIT APPLICATION FORM 319 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER VEGETATED FILTER STRIP (LS VFS) SUPPLEMENT 722 This form must be completely filled outs pnnied initialed and submitted I PROJECT INFORMATION CIS Project name Brighton Forest Phase VII-13 Contact name Nicholas J Antnlh PE Phone number 919469 3340 Date April 2012 Drainage area number 1 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 Impervious surface area Percent Impervious Rational C coefficient Peak flow from the 1 in/hr stone Time of concentration Rainfall intensity 10 yr stone Peak flow from the 10 yr storm Design stone Maximum amount of flow directed to the LS VFS Is a flow bypass system going to be used'7 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 stone 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 Width of VFS Elevation at downslope base of level lip Elevation at the end of the VFS that is farthest from the LS 301871 fe 77 500 fe 2567 % 046 fdcfs 319 cfs 500 min 722 in/hr 2302 CIS t incrunour storm 338 Cis Y (Y or N) Do not complete this section of the form Pict one CIS Cis Do not complete this section of the form 10 CIS CIS Do not complete this section of the form (Y or N) 155 sq It 12 In 12 in 10 fdcfs 34 ft 34 ft 30 ft 27200 fmsl 27140 fmsl Forebay is adequately sized Depth is appropriate Form SW401 LS-VFS 27Ju12011 Rev 9 page 1 of 3 Slope (from level lip to the end of the VFS) Are any draws present in the VFS'7 Is there a collector swale at the end of the VFS9 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 (dunng the 10 year storm) Peak velocity in the channel dunng the 10 yr storm Channel lining matenal Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Explanation of any Other" responses above 200 / N (Y or N) OK N (Y or N) Y (Y or N) Y (Y or N) Please provide plan details of flow spldter & supporting caks 300 It 000 It 1200 ft 098 It 102 It 723 fUsec Pick one N (Y or N) Y (Y or N) Class B Rip rap or Enkamat W + B 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 Requned 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 nght of way (ROW) and Boundanes of drainage easement 2 Plan details (1 30 or larger) for the level spreader showing Forebay (d 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 Page or plan sheet number and any notes Form SW401 LS-VFS 27Ju12011 Rev 9 page 2 of 3 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 (00) agreement H N)A V olESS% a SEAL 38549 C�tJ /o�/f I Z Form SW401 LS-VFS 27M2011 Rev 9 page 3 of 3 & 1(4 g on! f0oQ4Si 79 Worksheet for Bypass Channel- 1 Project Description Friction Method Manning Formula Solve For Normal Depth Input Data Roughness Coefficient 0 035 ft Channel Slope 008000 ft/ft Left Side Slope 300 ft/ft (H V) Right Side Slope 300 ft/ft (H V) Discharge 21 00 ft /s Results Normal Depth 098 ft Flow Area 291 ft Wetted Perimeter 622 ft Hydraulic Radius 047 ft Top Width 591 ft Critical Depth 1 25 ft Critical Slope 002240 ft/ft Velocity 723 ft/s Velocity Head 081 ft Specific Energy 180 ft Froude Number 1 82 Flow Type Supercritical GVF Input Data Downstream Depth 000 ft Length 000 ft Number Of Steps 0 GVF Output Data Upstream Depth 000 ft Profile Description Profile Headloss 000 ft Downstream Velocity Infinity ft/s Upstream Velocity Infinity ft/s Normal Depth 098 ft Critical Depth 1 25 ft Channel Slope 008000 ft/ft Critical Slope 002240 ft/ft Bentley Systems Inc Haestad Methods SoIBUotldI)~Master V81 (SELECTsenes 1) 108 1101033 4/4/2012 1 47 59 PM 27 Slemons Company Drive Suite 200 W Watertown CT 06795 USA +1 203 755 1666 Page 1 of 1 Is —4At-., t A "� 1 l ! c O�Ot WArZ��G 7 r o � Mr Tommy Fonville Community Properties 1000 St Albans Drive Suite 400 Raleigh, NC 27607 Nlichaet F Easley Governor William G Ross Jr secretary North Carolina Department of Environment and Natural Resources Alan W Kltm*, P E. Director Division of Water Quality October 28 2005 Subject Property Brighton Forest Subdivision Ut to Middle Creek [030402 2743 15 (4) C NSW] Approval of 401 Water Quality Certification with Addltlonal Conditions Dear Mr Fonville Project # 05 1701 Wake County You have our approval, in accordance with the attached conditions and those listed below, to place fill within or otherwise impact 0 34 acres of wetland, 343 linear feet of stream (249 LF feet pavlamal, 72 LF mterm ittent and 22 LF perennial temporary impacts) and 31705 square feet (fl) of protected riparian buffers (18 157 square feet Zone 1 and 13 548 square feet Zone 2) for the purpose of constructing roads and utility infrastructure within the proposed residential subdivision at the subject property, as described within your application dated September 6, 2005 and received by the N C Division of Water Quality (DWQ) on September 6 2005 with additional information received by the DWQ on October 18 2005 After reviewing your application, we have decided that the impacts are covered by General Water Quality Certification Numbers) 3402 and 3374 (GC3402 and GC3374) These Certification(s) allow you to use Nationwide Peimit(s)12 and 39 when issued by the US Army Corps of Engineers (USACE) This letter shall also act as your approved Authorization Certificate for impacts to the protected riparian buffers per I SA NCAC 2B 0233 In addition, you should obtain or otherwise comply with any other required federal, state or local permits before you go ahead with your project including (but not limited to) Erosion and Sedunent Control, and Non - discharge regulations Also, this approval to proceed with your proposed impacts or to conduct impacts to waters as depleted in your application shall expire upon expiration of the 404 or CAMA Permit. This approval is Tor the purpola- and design that you describers m your application If you change your project, you must notify us and you may be required to send us a new application. If the property is sold the new owner must be given a copy of this Certification and approval letter and is thereby responsible for complying with all conditions If total fills for this project (now or in the future) exceed one acre of wetland or ISO lu err feet of stream, compensatory mitigation may be required as described in 15A NCAC 2H 0506 (h) This approval requires you to follow the conditions listed in the attached certification and any additional conditions listed below Conditions of Certification 1 Impacts Approved The following mipaets 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 4010vemVNE*mss Review Pemb UM 1860 Mal SeMce Center Rele4% Nodh Car** 27899-1660 2321 Crabtree Boulevard Suns 250 Ralph, North Camilre 27804 Ptane. 819-733.17861 FAX 819-7338893! Irdemet hjtJ A320.enr.state.nc.us!►xwetlends ,tern 0pporhrr"Albmative Adm Em ftw — 60% Recycledl10% Post Consumer Paper Community Properties Page 2 of 3 October 28 2005 Impact To Amount Approved nib Plan Location or Reference Stream 249 IX perenn* PCN page 3 and 4 of 9 Stream 72 LF intermittent PCN pate 3 and 4 of 9 Stream 22 LF -erennial teinpong PCN vage 3 and 4 of 9 404 /CAMA Wetlands 0 34 acres PCN page 4 of 9 Zone 1 TPBR Buffer Impacts 18 157 a feet PCN page 8 of 9 Zone 2 TPBR Buffer Impacts 13 548 (square feet PCN page 8 of 9 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 404/401Permit 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 to the maximum extent practicable If placement of sediment and erosion control devices in wetlands and waters is unavoidable, they shall be removed and the natural grade restored within six months of the date that the Division of Land Resources has released the project, 5 Protective Fencing The outside buffer, wetland or water boundary and along the construction condor within these boundaries approved under this authorization shall be clearly marked with orange warning fencing (or similar high visibility material) for the area that have been approved to infringe within the buffer, wetland or water prior to any land disturbing activities to ensure compliance with 15 NCAC 2H Section 0500 6 Deed Notifications - Deed notifications or similar mechanisms shall be placed on all retained jurisdictional wetlands waters and protective buffers in order to assure compliance for future wetland, water and buffer impact These mechanisms shall be put in place prior to impacting any wetlands, waters and/or buffers approved for impact under this Certification Approval and Authorization Certificate A sample deed notification can be downloaded from the 401/Wetlands Unit Community Properties Page 3 of 3 October 28 2005 web site at http //h2o enr state nc us/newetlands The text of the sample deed notification may be modified as appropriate to suit to this project 7 Construction Stormwater Penmt NCG010000 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 (NCGO10000) administered by DWQ is automatically issued to the project This General Penmt allows stormwater to be discharged during land disturbing construction activitiestas 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 pertrut and monitoring report forms may be found at httn 11h2o err state nc Mg/s4 /Forms Documents htm 8 Culvert Installation Culverts required for this project shall be installed in such a manner that the original stream profiles are not altered Existing stream dimensions (including the cross section dimensions pattern, and longitudinal profile) must be maintained above and below locations of each culvert Culverts shall be designed and installed to allow for aquatic life movement as well as to prevent head cutting of the streams If any of the existing pipes are or become perched, the appropriate stream grade shall be re- established or, if the pipes installed in a perched manner the pipes shall be removed and re- installed correctly Culvert(s) shall not be installed in such a manner that will cause aggradation or erosion of the stream up or down stream of the culvert(s) Existing stream dimensions (including the cross section dimensions pattern and longitudinal profile) shall be maintained above and below locations of each culvert Therefore you must provide plans with adequate details that indicate that the current stability of the stream will be maintained or enhanced. You must receive written approval from this Office for the above plans before the culvert(s) is installed Culvert(s) must be installed according to approved plans Placement of culverts and other structures in waters streams and wetlands must be placed below the elevation of the streambed by one foot for all culverts with a diameter greater than 48 inches, and 20 percent of the culvert diameter for culverts having a diameter less than 48 inches, to allow low flow passage of water and aquatic life Design and placement of culverts and other shuctures including temporary erosion control measures shall not be conducted in a manner that may result in dis equilibrium of wetlands or streambeds or banks adjacent to or upstream and down stream of the above structures The applicant is required to provide evidence that the equilibrium shall be maintained if requested in writing by DWQ The establishment of native woody vegetation and other soft stream bank stabilization techniques must be used where practicable instead of np rap or other bank hardening methods If np rap is necessary it shall not be placed in the stream bed, unless specifically approved by the Division of Water Quality Installation of culverts in wetlands must ensure continuity of water movement and be designed to adequately accommodate high water or flood conditions Upon completion of the project the Applicant shall complete and return the enclosed' Certificate of Completion" fora to notify NCDWQ when all work included in the §401 Certification has been completed The responsible party shall complete the attached form and return it to the 401/Wethmds Community Properties Page 4 of 3 October 28 2005 Unit of the NC Division of Water Quality upon completion of the project. Please send photographs upstream and downstream of each culvert site to document correct installation along with the Certificate of Completion form. 9 DifIbse Flow (No Review) All constructed stormwater conveyance outlets shall be directed and maintained as diffuse flow at won- emsive velocities through the protected stream, buffars such that it will not re concentrate before discharong into a stream as identified within Y SA NCAC 2B 0233 (5) If thus is not possible, it may be necessary to provide stormwater facilities that are considered to remove nitrogen. This may require additional approval from this Office 10 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/Wetlands Unit, North Carolina Division of Water Quality, 1650 Mail Service Center, Raleigh, NC, 27699 -1650 Violations of any condition herein set forth may result in revocation of due Certification and may result in criminal and/or civil penalties The authorization to proceed with your proposed impacts or to conduct impacts to waters as depicted in your application and as authorized by this Certification shall expire upon expiration of the 404 or CAMA Permit If you do not accept any of the conditions of this Certification (associated with the approved wetland or stream ), you may ask for an adjudicatory Bean iX You must ad within 60 days of the date that you receive this letter To ask for a hearing, send -a written petition, which conforms to Chapter 150B of the North Carolina General, Statutes to the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, N C 27699 -6714 This ce rtifica*n and its conditions are final and binding unless you ask for a hearing. This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any questions, please telephone Cyndi Karoly or Ian McMillan in the Central Office in Raleigh at 919 - 733 -1786 or Mike Horan in the DWQ Raleigh Regional Office at 919491-4200 Sincerely, ar-�% � G� Alan W Klimek- P.E. AW]rJ#m rJ1130 b, t t,.. v Enclosures GC 3374 and GC 3402 Alec " Certificate of Completion Community Properties Page 5 of 3 October 28 2005 cc USACE Raleigh Regulatory Field Office Mike Horan, DWQ Raleigh Regional Office DLR Raleigh Regional Office File Copy Central Files Sean Clark, Soil & Environmental Consultants P A, 11010 Raven Ridge Road, Raleigh, NC 27614 Filenames 05 1701BnSWonFomt,4D(Wske)401 +NBR 4L