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HomeMy WebLinkAbout20071558 Ver 1_More Info Received_20070928;~a~c~~~a~~ s~~ 2 s ZaaT Office Use Only: itENR - WATER QtJ11ttTY ~IANDQ RND 5T1~z-~p~a, Form Version March OS USACE Action ID No. DWQ No. ~~ _ ~ ~~~ (If any particular item is not applicable to this project, please enter "Not Applicable" or "N/A".) I. Processing 1. Check all of the approval(s) requested for this project: ^ Section 404 Permit ® Riparian or Watershed Buffer Rules ^ Section 10 Permit ^ Isolated Wetland Permit from DWQ ^ 401 Water Quality Certification ^ Express 401 Water Quality Certification 2. Nationwide, Regional or General Permit Number(s) Requested: Buffer Compliance 3. If this notification is solely a courtesy copy because written approval for the 401 Certification is not required, check here: ^ 4. If payment into the North Carolina Ecosystem Enhancement Program (NCEEP) is proposed for mitigation of impacts, attach the acceptance letter from NCEEP, complete section VIII, and check here: ^ 5. If your project is located in any of North Carolina's twenty coastal counties (listed on page 4), and the project is within a North Carolina Division of Coastal Management Area of Environmental Concern (see the top of page 2 for further details), check here: ^ IL Applicant Information Owner/Applicant Information Name: Glen Lake Groin LLC Attn: Term Stephens Mailing Address: 8310 Bandford Way Raleigh NC 27615 Telephone Number: 57l -8263 Fax Number: 571-1521 E-mail Address: terryna creedmorpartners.com 2. Agent/Consultant Information (A signed and dated copy of the Agent Authorization letter must be attached if the Agent has signatory authority for the owner/applicant.) Name: Todd Preunin~er Company Affiliation: Withers & Ravenel Mailing Address: 114 MacKenan Drive Cart/ NC. 27511 Telephone Number: 919-469-3340 Fax Number: 919-535-4545 E-mail Address: tpreuninger(a~withersravenel.com III. Project Information Attach a vicinity map clearly showing the location of the property with respect to local landmarks such as towns, rivers, and roads. Also provide a detailed site plan showing property Page 1 of 8 boundaries and development plans in relation to surrounding properties. Both the vicinity map and site plan must include a scale and north arrow. The specific footprints of all buildings, impervious surfaces, or other facilities must be included. If possible, the maps and plans should include the appropriate USGS Topographic Quad Map and NRCS Soil Survey with the property boundaries outlined. Plan drawings, or other maps may be included at the applicant's discretion, so long as the property is clearly defined. For administrative and distribution purposes, the USACE requires information to be submitted on sheets no larger than 11 by 17-inch format; however, DWQ may accept paperwork of any size. DWQ prefers full-size construction drawings rather than a sequential sheet version of the full-size plans. If full-size plans are reduced to a small scale such that the final version is illegible, the applicant will be informed that the project has been placed on hold until decipherable maps are provided. 1. Name of project: Glen Lake Subdivision, Phase 2 & 3 2. T.I.P. Project Number or State Project Number (NCDOT Only): NA 3. Property Identification Number (Tax PIN): 079174305, 079176123. 079178688 4. Location County: Wake Nearest Town: Raleigh Subdivision name (include phase/lot number): Glen Lake Subdivision Phase 2 & 3 Directions to site (include road numbers/names, landmarks, etc.):The site is located on the western side of Blue Ridge Rd ASR 1670) at the intersection of Glen Eden Drive and Blue Site coordinates (For linear projects, such as a road or utility line, attach a sheet that separately lists the coordinates for each crossing of a distinct waterbody.) Decimal Degrees (6 digits minimum): 35.8310321°N ; 78.6898208°W 6. Property size (acres) 18 acres 7. Name of nearest receiving body of water: Crabtree Creek 8. River Basin: Neuse River Basin (Note -this must be one of North Carolina's seventeen designated major river basins. The River Basin map is available at http://h2o.enr.state.nc.us/admin/maps/.) 9. Describe the existing conditions on the site and general land use in the vicinity of the project at the time of this application: The site is currently wooded and is surrounded by residential housing. 10. Describe the overall project in detail, including the type of equipment to be used: Construction of by-pass swales for the level spreaders. The overall project is construction of a residential subdivision. Typical heavy equipment, such as excavators will be utilized to install the infrastructure. Page 2 of 8 11. Explain the purpose of the proposed work: The project is intended to meet the rg owing demand for housing in the area. IV. Prior Project History If jurisdictional determinations and/or permits have been requested and/or obtained for this project (including all prior phases of the same subdivision) in the past, please explain. Include the USACE Action ID Number, DWQ Project Number, application date, and date permits and certifications were issued or withdrawn. Provide photocopies of previously issued permits, certifications or other useful information. Describe previously approved wetland, stream and buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project, list and describe permits issued for prior segments of the same T.I.P. project, along with construction schedules. Wetlands were delineated bySoil and Environmental Consultants and a site meeting was conducted with the NC-DWQ on August 21, 2000 (DWQ NBRRO 00-209) to verify stream origin points. The buffer letter is included with the attachments. V. Future Project Plans Are any future permit requests anticipated for this project? If so, describe the anticipated work, and provide justification for the exclusion of this work from the current application. No additional impacts are proposed at this time. VI. Proposed Impacts to Waters of the United States/Waters of the State It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to wetlands, open water, and stream channels associated with the project. Each impact must be listed separately in the tables below (e.g., culvert installation should be listed separately from riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts, permanent and temporary, must be listed, and must be labeled and clearly identifiable on an accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial) should be shown on a delineation map, whether or not impacts are proposed to these systems. Wetland and stream evaluation and delineation forms should be included as appropriate. Photographs may be included at the applicant's discretion. If this proposed impact is strictly for wetland or stream mitigation, list and describe the impact in Section VIII below. If additional space is needed for listing or description, please attach a separate sheet. 1. Provide a written description of the proposed impacts: The proposed permanent impacts consist of 1,033 SF of zone l and 724 SF of zone 2 buffer impact for the installation of level spreader bypass swales. No wetland or stream impacts are proposed for the project. 2. Individually list wetland impacts. Types of impacts include, but are not limited to mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams, separately list impacts due to both structure and flooding. Page 3 of 8 Wetland Impact Type of Wetland Located within Distance to Area of Site Number Type of Impact (e.g., forested, marsh, 100-year Floodplain Nearest Stream Impact (acres) (indicate on map) herbaceous, bog, etc.) (yesMo) (linear feet) 1 Fill Forested NO 150 LF 0.02 Total Wetland Impact (acres) 0.02 3. List the total acreage (estimated) of all existing wetlands on the property: ~ 0.5 acres 4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed, plans and profiles showing the linear footprint for both the original and relocated streams must be included. To calculate acreage, multiply length X width, then divide by 43,560. Stream Impact Perennial or Average impact Area of Number Stream Name Type of Impact Intermittent? Stream Width Length Impact (indicate on map) Before Impact (linear feet) (acres) NA NA NA NA NA NA NA Total Stream Impact (by length and acreage) NA NA 5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic Ocean and any other water of the U.S.). Open water impacts include, but are not limited to fill, excavation, dredgin , floodin , draina e, bulkheads, etc. Open Water Impact Name of Waterbody Type of Waterbody Area of Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact (indicate on map) ocean, etc.) (acres) NA NA NA NA NA Total Open Water Impact (acres) NA 6. List the cumulative impact to all Waters of the U.S. resulting from the proiect: Stream Impact (acres): NA Wetland Impact (acres): NA Open Water Impact (acres): NA Total Impact to Waters of the U.S. (acres) NA Total Stream Impact (linear feet): NA 7. Isolated Waters Do any isolated waters exist on the property? ^ Yes ®No Describe all impacts to isolated waters, and include the type of water (wetland or stream) and the size of the proposed impact (acres or linear feet). Please note that this section only applies to waters that have specifically been determined to be isolated by the USACE. Page 4 of 8 8. Pond Creation If construction of a pond is proposed, associated wetland and stream impacts should be included above in the wetland and stream impact sections. Also, the proposed pond should be described here and illustrated on any maps included with this application. Pond to be created in (check all that apply): ^ uplands ^ stream ^ wetlands Describe the method of construction (e.g., dam/embankment, excavation, installation of draw-down valve or spillway, etc.): NA Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond, local stormwater requirement, etc.): NA Current land use in the vicinity of the pond: NA Size of watershed draining to pond: NA Expected pond surface area: NA VII. Impact Justification (Avoidance and Minimization) Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide information related to site constraints such as topography, building ordinances, accessibility, and financial viability of the project. The applicant may attach drawings of alternative, lower-impact site layouts, and explain why these design options were not feasible. Also discuss how impacts were minimized once the desired site plan was developed. If applicable, discuss construction techniques to be followed during construction to reduce impacts. The site plan was developed such that no wetlands or streams were impacted by the proposed development. However, in order to comply with the level spreader design guidelines, impacts to the buffer could not be avoided. The applicant also utilized a retaining wall at the back of the Townhomes to minimize impacts, but due to site constraints, a small portion of wetlands was impacts for the installation of a level spreader. VIII. Mitigation DWQ - In accordance with 15A NCAC 2H .0500, mitigation may be required by the NC Division of Water Quality for projects involving greater than or equal to one acre of impacts to freshwater wetlands or greater than or equal to 150 linear feet of total impacts to perennial streams. USACE - In accordance with the Final Notice of Issuance and Modification of Nationwide Permits, published in the Federal Register on January 15, 2002, mitigation will be required when necessary to ensure that adverse effects to the aquatic environment are minimal. Factors including size and type of proposed impact and function and relative value of the impacted aquatic resource will be considered in determining acceptability of appropriate and practicable mitigation as proposed. Examples of mitigation that may be appropriate and practicable include, but are not limited to: reducing the size of the project; establishing and maintaining wetland and/or upland vegetated buffers to protect open waters such as streams; and replacing losses of aquatic resource functions and values by creating, restoring, enhancing, or preserving similar functions and values, preferable in the same watershed. If mitigation is required for this project, a copy of the mitigation plan must be attached in order for USACE or DWQ to consider the application complete for processing. Any application Page 5 of 8 lacking a required mitigation plan or NCEEP concurrence shall be placed on hold as incomplete. An applicant may also choose to review the current guidelines for stream restoration in DWQ's Draft Technical Guide for Stream Work in North Carolina, available at http://h2o.enr.state.nc.us/ncwetlands/strmgide. html. 1. Provide a brief description of the proposed mitigation plan. The description should provide as much information as possible, including, but not limited to: site location (attach directions and/or map, if offsite), affected stream and river basin, type and amount (acreage/linear feet) of mitigation proposed (restoration, enhancement, creation, or preservation), a plan view, preservation mechanism (e.g., deed restrictions, conservation easement, etc.), and a description of the current site conditions and proposed method of construction. Please attach a separate sheet if more space is needed. Because the wetland impacts are less than 0.1 acres and there are no stream impacts, mitigation is not proposed. 2. Mitigation may also be made by payment into the North Carolina Ecosystem Enhancement Program (NCEEP). Please note it is the applicant's responsibility to contact the NCEEP at (919) 715-0476 to determine availability, and written approval from the NCEEP indicating that they are will to accept payment for the mitigation must be attached to this form. For additional information regarding the application process for the NCEEP, check the NCEEP website at http://h2o.enr.state.nc.us/wrp/index.htm. If use of the NCEEP is proposed, please check the appropriate box on page five and provide the following information: Amount of stream mitigation requested (linear feet): NA Amount of buffer mitigation requested (square feet): NA Amount of Riparian wetland mitigation requested (acres): NA Amount ofNon-riparian wetland mitigation requested (acres): NA Amount of Coastal wetland mitigation requested (acres): NA IX. Environmental Documentation (required by DWQ) 1. Does the project involve an expenditure of public (federal/state/local) funds or the use of public (federal/state) land? ~ Yes ^ No 2. If yes, does the project require preparation of an environmental document pursuant to the requirements of the National or North Carolina Environmental Policy Act (NEPA/SEPA)? Note: If you are not sure whether aNEPA/SEPA document is required, call the SEPA coordinator at (919) 733-5083 to review current thresholds for environmental documentation. Yes ^ No 3. If yes, has the document review been finalized by the State Clearinghouse? If so, please attach a copy of the NEPA or SEPA final approval letter. Yes ^ No Page 6 of 8 X. Proposed Impacts on Riparian and Watershed Buffers (required by DWQ) It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to required state and local buffers associated with the project. The applicant must also provide justification for these impacts in Section VII above. All proposed impacts must be listed herein, and must be clearly identifiable on the accompanying site plan. All buffers must be shown on a map, whether or not impacts are proposed to the buffers. Correspondence from the DWQ Regional Office may be included as appropriate. Photographs may also be included at the applicant's discretion. 1. Will the project impact protected riparian buffers identified within 15A NCAC 2B .0233 (Neuse), 15A NCAC 2B .0259 (Tar-Pamlico), 1 SA NCAC 02B .0243 (Catawba) 15A NCAC 2B .0250 (Randleman Rules and Water Supply Buffer Requirements), or other (please identify )? Yes ® No ^ 2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers. If buffer mitigation is required calculate the required amount of mitigation by applying the buffer multipliers. Zone* Impact Multi Tier Required i..,.......o c ot~ P r,r;.;,..,.;,,,, 1 1,329 3 (2 for Catawba) NA 2 1,152 1.5 NA Total 2,481 NA * Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an additional 20 feet from the edge of Zone 1. 3. If buffer mitigation is required, please discuss what type of mitigation is proposed (i.e., Donation of Property, Riparian Buffer Restoration /Enhancement, or Payment into the Riparian Buffer Restoration Fund). Please attach all appropriate information as identified within 15A NCAC 2B .0242 or .0244, or .0260. Because the bypass swale is an allowable activity, buffer mitigation is not required. XI. Stormwater (required by DWQ) Describe impervious acreage (existing and proposed) versus total acreage on the site. Discuss stormwater controls proposed in order to protect surface waters and wetlands downstream from the property. If percent impervious surface exceeds 20%, please provide calculations demonstrating total proposed impervious level. The proposed impervious surface for this project will be greater than 30%, however, because 401 certification is not, we do not believe that apre-approved stormwater mana e~plan is required. The applicant will provide diffuse flow into the buffers via level spreaders. XII. Sewage Disposal (required by DWQ) 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. Sanitary Sewer Page 7 of 8 XIII. Violations (required by DWQ) Is this site in violation of DWQ Wetland Rules (1 SA NCAC 2H .0500) or any Buffer Rules? Yes ^ No Is this an after-the-fact permit application? Yes ^ No XIV. Cumulative Impacts (required by DWQ) Will this project (based on past and reasonably anticipated future impacts) result in additional development, which could impact nearby downstream water quality? Yes ^ No If yes, please submit a qualitative or quantitative cumulative impact analysis in accordance with the most recent North Carolina Division of Water Quality policy posted on our website at http://h2o.enr.state.nc.us/ncwetlands. If no, please provide a short narrative description: We do not believe the applicant will be required to comply with the phase II stormwater rules and will retain the riparian buffers on-site, therefore we do not believe that this project will have a negative effect on down stream water quality. XV. Other Circumstances (Optional): It is the applicant's responsibility to submit the application sufficiently in advance of desired construction dates to allow processing time for these permits. However, an applicant may choose to list constraints associated with construction or sequencing that may impose limits on work schedules (e.g., draw-down schedules for lakes, dates associated with Endangered and Threatened Species, accessibility problems, or other issues outside of the applicant's control). ~~ Applicant/Agent's Signature Date (Agent's signature is valid only if an authorization letter from the applicant is provided.) Page 8 of 8 Oyu ry~G ~ ~ ti ~~~ ~ r ~~ ~ < ~~ NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be filled ouf on line, printed and submitted with all of the required information. Make sure to also fill ouf and submit the Required Items Checklist (Parf Ill) and the I&M Agreement (Part ll~ I. PROJECT INFORMATION Project name Glenlake SID, Phases 2 & 3 Contact name Kenneth Jesneck, PE Phone number 469-3340 Date Drainage area number September 27, 2007 LS 50A II; DESIGN INFORMATION ~~ a, .... ~ '~ -, , ",' For Level Spreaders Receiving Flow From a BMP Type of BMP Level Spreader Drawdown flow from the BMP cfs For Level Spreaders Receiving Flow from the Drainage Area Drainage area Impervious surface area Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm Rainfall intensity, 10-yr, 24-hr storm Peak flow from the 10-yr, 24-hr storm Where Does the Level Spreader Discharge? To a bioretention cell? To a wetland? To a filter strip or riparian buffer? Other (specify) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass Width of dense ground cover Width of wooded vegetation Total width Slope (from level lip to to top of bank) Are any draws present? Level Spreader Design Forebay surface area Feet of level lip needed per cfs Length based on the 1 inlhr storm? Length based on the 10-yr, 24-hr storm? Length based on the BMP discharge rate? Design flow Is a bypass device provided? Are level spreaders in series? Length of the level lip Bypass Channel Design (if applicable) 3.24 ac 1.57 ac 48.46 0.5 2.32 cfs 0.21 inlhr cfs N (Y or N) N (Y or N) Y (Y or N) Please complete filter strip characterization below. 0 ft 0 ft 50 ft 50 ft 2 N (Y or N) Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.1 70 sq ft 65 ftlcfs Y (Y or N) N (Y or N) N (Y or N) 2.32 cfs N (Y or N) N (Y or N) 130 ft Level spreader cannot be located upslope of a draw. A bypass device is not needed. #VALUE! Level spreader is not long enough. C'' Parts I. and II. De gn Summary, page 1 of 2 Does the bypass discharge through a wetland? Does the channel enter the stream at an angle (if applicable)? Dimensions of the channel (see diagram below): M B W Y Peak velocity in the channel during the 10-yr, 24-hr storm Channel lining material (Y or N) ft ft ft ft cfs t ~----------- M M Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.1 Parts I. and II. Design Summary, page 2 of 2 ~~~ w ~~ NCDENR O~v y~G >('_~~_~ O ` `~/- STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be filled out online, printed and submitted with all of the required information. Make sure to also fill out and submit the Required Ifems Checklist (Part III) and the I &M Agreement (Part 11~ I. PROJECT INFORMATION Project name Glenlake SID, Phases 2 & 3 Contact name Kenneth Jesneck, PE Phone number 469-3340 Date September 27, 2007 Drainage area number LS 50B Ih DESItaN lNF4RMIATION , . _ . , , .. ., .: ,_e ., a .. .. , For Level Spreaders Receiving Flow From a BMP Type of BMP Level Spreader Drawdown flow from the BMP cfs For Level Spreaders Receiving Flow from the Drainage Area Drainage area Impervious surface area Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm Rainfall intensity, 10-yr, 24-hr storm Peak flow from the 10-yr, 24-hr storm Where Does the Level Spreader Discharge ? To a bioretention cell? To a wetland? To a filter strip or riparian buffer? Other (specify) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass Width of dense ground cover Width of wooded vegetation Total width Slope (from level lip to to top of bank) Are any draws present? Level Spreader Design Forebay surface area Feet of level lip needed per cfs Length based on the 1 inlhr storm? Length based on the 10-yr, 24-hr storm? Length based on the BMP discharge rate? Design flow Is a bypass device provided? Are level spreaders in series? Length of the level lip Bypass Channel Design (if applicable) 1.85 ac p 1 0.178 ac a~~~ ~~ c.,c.,~,+rs ~°~ t r'n ~.t v t as°~c5,, 47.57 1 a~,~~c~ N y~~F ~....}. ~~4. r.~,,,, 0.5 ~' 1.33. cfs r-' ~p~~~~C~(~ c,°ve~ 0.21 in/hr~-- S~'~ ~ Y~~ 0.19425 cfs N (Y or N) N (Y or N) Y (Y or N) Please complete filter strip characterization below. 50 ft F~ t? ,' ~ ~'~~° ~~ ~ ~Cr NS _____- ~~X-.. 1.67 N (Y or N) level spreader cannot be located 40 sq ft 65 ft/cfs Y (Y or N) N (Y or N) N (Y or N) 1.33 cfs N (Y or N) (Y or N) 74 ft a ~~ Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.1 ~t~~ ~~ OK r~~~ ,:~e `w, ,~ A bypass device is not needed. #VALUE! Level spreader is not long enough ~,~3 ~ GS ; ~ ~~~S~J ~~~ Parts I. aritlUr. Design Summary, e 1 of 2 Does the bypass discharge through a wetland? Does the channel enter the stream at an angle (if applicable)? Dimensions of the channel (see diagram below): M B W Y Peak velocity in the channel during the 10-yr, 24-hr storm Channel lining material (Y or N) ft ft ft ft cfs M • B ----+ ~ M Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.1 Parts I. and II. Design Summary, page 2 of 2 ~~~ NCDENR 469-3340 STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be filled out on line, printed and submitted with all of the required information. Make sure to also fill out and submit the Required Items Checklist (Part III) and the I&M Agreement (Part III I. PROJECT INFORMATION ~ ,~~ ~'t Project name Glenlake SID, Phases 2 & 3 Contact name Kenneth Jesneck, PE Phone number Date Drainage area number September 27, 2007 FES 40 IL ,DESIGN INFORMATION.`.; _ . For Level Spreaders Receiving Flow From a BMP Type of BMP Level Spreader Drawdown flow from the BMP cfs For Level Spreaders Receiving Flow from the Drainage Area Drainage area Impervious surface area Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm Rainfall intensity, 10-yr, 24-hr storm Peak flow from the 10-yr, 24-hr storm Where Does the Level Spreader Discharge? To a bioretention cell? To a wetland? To a filter strip or riparian buffer? Other (specify) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass Width of dense ground cover Width of wooded vegetation Total width Slope (from level lip to to top of bank) Are any draws present? Level Spreader Design Forebay surface area Feet of level lip needed per cfs Length based on the 1 inlhr storm? Length based on the 10-yr, 24-hr storm? Length based on the BMP discharge rate? Design flow Is a bypass device provided? Are level spreaders in series? Length of the level lip Bypass Channel Design (if applicable) O~Vry~~~ry~G > ~LJUJ`,7~ ti O ~ < 0.58 ac 0.45 ac 77.59 0.8 0.45 cfs 0.21 in/hr 0.09744 cfs (Y or N) (Y or N) (Y or N) Please complete filter strip characterization below. 0 ft 0 ft 50 ft 50 ft 5.71 N (Y or N) Level spreader cannot be located upslope of a draw. 19.25 sq ft OK 65 ftlcfs Y (Y or N) N (Y or N) N (Y or N) 0.45 cfs N (Y or N) A bypass device is not needed. N (Y or N) #VALUE! 9 ft Level spreader is not long enough. ~'L ~ • ~1 S 7( ~l S ~ 2 Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.1 Parts I. and II. Design Summary, page 1 of 2 Does the bypass discharge through a wetland? (Y or N) Does the channel enter the stream at an angle (if applicable)? Dimensions of the channel (see diagram below): M ft B ft W ft y ft Peak velocity in the channel during the 10-yr, 24-hr storm cfs Channel lining material 1 uv M ~ B ~ 1 M Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.1 Parts I. and II. Design Summary, page 2 of 2 ~F~ ~~~~ NCDENR o~~~~yOG o~< STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be tilled out on line, printed and submitted with all of the required information. Make sure to also till out and submit the Required Items Checklist (Part III) and the I &M Agreement (Parf III 1: PROJECT INFORMATION` Project name Glenlake SID, Phases 2 & 3 Contact name Kenneth Jesneck, PE Phone number 469-3340 Date Drainage area number September 27, 2007 FES 10 II, DESIGN INFORMATIQN _ ." ~: For Level Spreaders Receiving Flow From a BMP Type of BMP Level Spreader Drawdown flow from the BMP cfs For Level Spreaders Receiving Flow from the Drainage Area Drainage area Impervious surface area Percent impervious Rational C coefficient Peak flow from the 1 in/hr storm Rainfall intensity, 10-yr, 24-hr storm Peak flow from the 10-yr, 24-hr storm Where Does the Level Spreader Discharge? To a bioretention cell? To a wetland? To a filter strip or riparian buffer? Other (specify) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass Width of dense ground cover Width of wooded vegetation Total width Slope (from level lip to to top of bank) Are any draws present? Level Spreader Design Forebay surface area Feet of level lip needed per cfs Length based on the 1 inlhr storm? Length based on the 10-yr, 24-hr storm? Length based on the BMP discharge rate? Design flow Is a bypass device provided? Are level spreaders in series? Length of the level lip Bypass Channel Design (if applicable) 1.4 ac 1.14 ac 81.43 0.8 1.14 cfs 021 inlhr 0.2352 cfs N (Y or N) N (Y or N) Y (Y or N) Please complete filter strip characterization below. 0 ft 0 ft 50 ft 50 ft 2.14 N (Y or N) Level spreader cannot be located upslope of a draw. 49.5 sq ft OK 65 ft/cfs Y (Y or N) N (Y or N) N (Y or N) 1.14 cfs N (Y or N) N (Y or N) ft A bypass device is not needed. #VALUE! Level spreader is not long enough. Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.1 Parts I. and II. Design Summary, page 1 of 2 Does the bypass discharge through a wetland? (Y or N) Does the channel enter the stream at an angle (if applicable)? Dimensions of the channel (see diagram below): M ft B ft W ft y ft Peak velocity in the channel during the 10-yr, 24-hr storm cfs Channel lining material Y ~ t ------------- M M B Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.1 Parts I. and II. Design Summary, page 2 of 2 ~~~ NCDENR O~v ry~G ?~'~~_ _ o `\~-' -c STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be filled out on line, printed and submitted with all of the required information. Make sure to also fill out and submit the Required Items Checklist (Part III) and the I&M Agreement (Part IV) I. PROJECT INFORMATION ~' ~'`' Project name Glenlake SID, Phases 2 & 3 Contact name Kenneth Jesneck, PE Phone number 469-3340 Date Drainage area number September 27, 2007 FES 20 II. DESIGN INFORMATION ` For Level Spreaders Receiving Flow From a BMP Type of BMP Level Spreader Drawdown flow from the BMP cfs For Level Spreaders Receiving Flow from the Drainage Area Drainage area Impervious surface area Percent impervious Rational C coefficient Peak flow from the 1 inlhr storm Rainfall intensity, 10-yr, 24-hr storm Peak flow from the 10-yr, 24-hr storm 2.34 ac 1.69 ac 72.22 0.7 1.7 cfs 0.21 in/hr 0.34398 cfs Where Does the Level Spreader Discharge? To a bioretention cell? To a wetland? To a filter strip or riparian buffer? Other (specify) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass Width of dense ground cover Width of wooded vegetation Total width Slope (from level lip to to top of bank) Are any draws present? Level Spreader Design Forebay surface area Feet of level lip needed per cfs Length based on the 1 inlhr storm? Length based on the 10-yr, 24-hr storm? Length based on the BMP discharge rate? Design flow Is a bypass device provided? Are level spreaders in series? Length of the level lip Bypass Channel Design (if applicable) N (Y or N) N (Y or N) Y (Y or N) Please complete filter strip characterization below. 50 ft 50 ft 5.89 N (Y or N) Level spreader cannot be located upslope of a draw. 75 sq ft OK 65 ft/cfs Y (Y or N) N (Y or N) N (Y or N) 1.7 cfs N (Y or N) pass device is not needed. N (Y or N #VALUE! 111 ft Level spreader length OK. 1.7x1.5-1/0.x" Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.1 Parts I. and II. Design Summary, page 1 of 2 Does the bypass discharge through a wetland? (Y or N) Does the channel enter the stream at an angle (if applicable)? Dimensions of the channel (see diagram below): M ft B ft W ft y ft Peak velocity in the channel during the 10-yr, 24-hr storm cfs Channel lining material M B ' 1 M Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.t Parts I. and II. Design Summary, page 2 of 2