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Home My WebLink About20060794 Ver 2_More Info Received_20090108 D r) q vP =s y ULU .?r`AF NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be completely filled out, printed and submitted. DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET) l For Level Spreaders Receiving Flow From a BMP Type of BMP 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 inmr storm Time of concentration Rainfall intensity, 10-yr storm Peak flow from the 10-yr storm Where Does the Level Spreader Discharge? To a grassed bioretention ceq? To a mulched 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 Elevation at downslope base of level lip Elevation at top of bank of the receiving water 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 cis Answer "Y" to one of the following: Length based on the 1 irdhr storm? Length based on the 10-W storm? Length based on the BMP discharge rate? Design flow 19,166.00 ftz 7,841.00 ft' 40.91 % 0.68 0.30 cis 5:00 min 7.3 inlhr 2.18 cfs N (Y or N) N (Y or N) N (Y or N) Y (Y or N) Please complete filter strip characterization below. 0.00 ft 20.00 It 30.00 It 50.00 it 280.50 fmsl 278.00 fmsl 5.00 % N (Y or N) 16:00 sq ft 44 ftlcfs Y (Y or N) N (Y or N) N (Y or N) 2.20 efs OK OK OK JAN hflL4NDS DNk yyr,r 'F.1'11'-LJIY ANp STOR,dWATER BRANCH Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 1 of 4 y ? t f ? Is a bypass device provided? Length of the level lip Are level spreaders in series? Bypass Channel Design (if applicable) Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Dimensions of the channel (see diagram below): Y (Y or N) 30.00 ft N (Y or N) N (Y or N) Y (Y or N) OK Level spreader length OK. Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 2 of 4 r M 2.00 ft B 2.00 ft w 10.00 ft y 0.20 ft Peak velocity in the channel during the 10-yr storm 5.08 cfs Channel lining material GRASS w M M Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 3 of 4 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. N a requirement has not been met, attach justification. Pagel Plan Initials A Sheet No. 2 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 (ROM, and - Boundaries of drainage easement. ATb L? 2 Plan details (1" = 30' l f . or arger) or the level spreader showing: - Forebay (f applicable), - High flow bypass system, - One foot topo lines between the level lip and top of stream bank, - Proposed drainage easement, and AJ7 - Design at ultimate build-out 3. Section view of the level spreader (1" = 20' or larger) showing: - Underdrain system (if applicable), - Level lip, - Upsiope channel, and Downslope filter fabric. 4. A date-stamped photograph of the filter ship that clearly shows the type of vegetation that is present. ?cJ 5 A . construction sequence that shows how the level spreader will be protected from sediment until the _ entire drainage area is stabilized. 6. The supporting calculations. 7. A copy of the signed and notarized operation and maintenance (0&M) agreement. copy of the deed restrictions (if required). &J /h-A? Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Part III, page 4 of 4 HYDRAULIC RESULTS Discharge cfs Peak Fbw Period s elocia UPS Area (soft) Hydraulic Radu Namal D It 2.2 24.0 5.08 0.43 0.17 0.20 DESIGN FREQUENCY:, 10 YEAR 1 wanOT00 ft 1 Not to Scale Reach Mattig Type tabftAnalya' Vegetation Chiwacte#Wcs PennisvNe Calculated SaletyFactor Remarks Staple Pattern Phate Class Type Density Shear Stress (W Sheer Sbess (Psn Straight Unreiforced Vegetation D Sod 75.95% 3.33 0.61 5.42 STABLE Sol Clay (1070 0049 1.44 STABLE Back to InputScreen A264 6.0 tl '= a3v IA-? a9 Page 1 of 1 r :- http://www.axcessmypics.com/photos/photo02/fe/3e/de49b727e37c.jpg 1/7/2009 G WDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This form must be completely Nied out, printed and submitted. DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)) ......... ..__......... __._.......... For Level Spreaders Receiving Flow From a BMP Type of BMP 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 Time of concentration Rainfall intensity, 10-yr storm Peak flow from the 10-yr storm Where Does the Level Spreader Discharge? To a grassed bioretention ce6? To a mulched bioretention cell? To a wetland? To a filter strip or riparian buffer? Other (specify) Filter Strip or Riparian Buffer Characterization (f applicable) Width of grass Width of dense ground cover Width of wooded vegetation Total width Elevation at downslope base of level lip Elevation at top of bank of the receiving water 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 cis Answer "Y" to one of the following: Length based on the 1 inftx storm? Length based on the 10-yr storm? Length based on the BMP discharge rate? Design flow 15,682.00 ft' 6,098.00 ft' 38.89 % 0.67 0.24 sfs 5.00 min 7.3 inlhr 1.76 efs N (Y or N) N (Y or N) N (Y or N) Y (Y or N) Please complete filter strip characterization below. 0.00 ft 20.00 ft 10.00 ft 30.00 ft 282.20 fmsl 280.50 fmsl 5.67 % N (Y or N) 13.00 sq ft 30 ft/cfs Y (Y or N) N (Y or N) N (Y or N) 1.80 cfs OK OK OK *0 01 Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 1 of 4 Is a bypass device provided? Y (Y or N) OK Length of the level lip 24.00 It Level spreader length OK. Are level spreaders in series? N {Y or N) Bypass Channel design (if applicable) Does the bypass discharge through a wetland? Does the channel enter the stream at an angle? Dimensions of the channel (see diagram below): N (Y or N) Y (Y or N) Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 2 of 4 M B W Y Peak velocity in the channel during the 10-yr storm Channel lining material M 2.00 ft 2.00 ft 10.00 ft 0.17 ft 5.03 Cfs GRASS W Y B M 1 Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and 11. Design Summary, page 3 of 4 ..: . ; .??j?1r.?!Y '. }}//..??((;jj-- ?:i? ?:?M?` ...- ? ?.,....?'::::i ?::::iv ::::::::::::::::::::i?:?:is:.:::iii;?:,::::::::::?:::::::::i:::L::::F::::'?::::: ?:?i:?t?:::::i::::::i::::i::iii:??i::i::::ii::•'}:?::?:.:'•,:•'.?:i::?{:5:.:.i:.i:.iii:.ii:.i:.iii:'::.:'::.r:iL.ii:.i:.ii:.i:.ii:'i:.i::.:::ii:.:.:':i.i: i::.: R.:::.......... Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package VIII result in a request for addi4onal information. This VIN 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. fl a requirement has not been met, attach justification. Pagel Plan Initials Sheet No. A T6 t° 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. `r L 2. Plan details (1" = 30' or larger) for the level spreader showing: - Forebay (f applicable), - High flow bypass system, - One foot topo lines between the level lip and by of stream bank, - Proposed drainage easement, and - Design at ultimate build-out. Al 3. Section view of the level spreader (1" = 20' or larger) showing: - Underdrain system (if applicable), - Level lip, - Upslope channel, and - Downslope filter fabric. 'A I IL- 4. A date-stamped of the filterstn ' that clearly shows the photograph p type of vegetation that is present. ILJ- L L_ 5. A oonstruchon sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. AI 6. The supporting calculations. 7. A copy of the signed and notarized operation and maintenance (0&M) agreement. A copy of the deed restrictions (if required). Form SW401-Level Spreader, Filter Strip, Restored Riparian Butter-Rev.5 Part III, page 4 of 4 Version AOM STATIONJREADi: 70 ST HYDRAULIC RESULTS Discharge ds Peak Flow Period Ns) elocity (fps Area (sq.ft) Hydraubc Radius R Namal Depth N 1.8 24.0 5.03 0.36 0.15 0.17 ................................................... IEL SPREADER 6 0.36ACRES 'FESIGN FREgUENLY;'IOYW 10 Widh-200 ft 10 Not to Scale Reach Mattip Type taWAn Vegetation Chatactoristics Pecristble CabJated Safety Factor Remarks Staple Patten Phase less Type Density Shear Stress (133f) Shear Skett (1330 Shaight Unrenforced Vegetation D Sod 75.95X 3.33 0.62 5.38 STABLE Soo 1]4 0.070 0.049 1.43 STABLE /? /? C2 F M-P?,??f?Gf o,o9 0.a9 FV9Prr 1 NCDENR STORMWATER MANAGEMENT PERMIT APPLICATION FORM 401 CERTIFICATION APPLICATION FORM LEVEL SPREADER, FILTER STRIP AND RESTORED RIPARIAN BUFFER SUPPLEMENT This fora must be completely filMed out prated and submitted. DO NOT FORGET TO ATTACH THE REQUIRED ITEMS CHECKLIST AND ALL REQUIRED ITEMS (NEXT WORKSHEET)I For Level Spreaders Receiving Flow From a BMP Type of BMP Drawdown flow from the BMP 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 Time of concentration Rainfall intensityr,10-yr storm Peak flow from the 10-yr storm Where Does the Level Spreader Discharge? To a grassed bioretention cell? To a mulched bioretention cell? To a wetland? To a filter strip or riparian buffer? Other (speedy) Filter Strip or Riparian Buffer Characterization (if applicable) Width of grass Width of dense ground cover Width of wooded vegetation Total width Elevation at downslope base of level lip Elevation at top of bank of the receiving water 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 ds Answer °Y" to one of the folkyMng: Length based on the 1 inily storm? Length based on the 10-yr storm? Length based on the BMP discharge rate? Design flow cfs 28,750.00 ft2 11,761.00 ft' 40.91 % 0.70 0.46 cis 5.00 min 7.3 inthr 3.37 cfs N (Y or N) N (Y or N) N (Y or N) Y (Y or N) 0.00 ft 20.00 ft 30.00 ft 50.00 It 278.50 fmsl 276.50 fmsl 4.00 % N (Y or N) 24.00 sq ft 44 ftfcfs Y (Y or N) N (Y or N) N (Y or N) 0.46 cfs Please complete filter strip characterization below. OK ?' ry OK JAN 8 2009 L`EiJi? - WAFER QUALITY OK WETLANDS AND STORMWATER BRANCH Form SW401-Level Spreader, Fitter Strip, Restored Riparian Buffer-Rev.5 Parts I. and II. Design Summary, page 1 of 4 Is a bypass device provided? Length of the level 10 Are level spreaders in series? Bypass Channel Design (if applicable) Does the bypass discharge through a wettttt? Does the channel enter the stream at an angle? Dimensions of the channel (see diagram below): Y (Y or N) OK 24.00 ft Level spreader length OK. N (Y or N) N (Y or N) Y (Y or N) Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.5 Parts I. and 11. Design Summary, page 2 of 4 M B W Y Peak velocity in the channel during the 10-yr storm Channel lining material M 2.00 ft 2.00 ft 10.00 ft 0.27 ft 5.03 cfs GRASS w M Form SW401-Level Spreader, Finer Strip, Restored Riparian Buffer-Rev 5 Parts I and II Design Summary, page 3 of 4 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. Paget Plan Initials Sheet No. A7 ? 4-43 1. Plans (1" - 60' or larger) of the entire site showing.- - Design at ultimate build-out,. - Off-site drainage (f 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. 415- 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 / - D ownslope filter fabric. A 6 4. A date-stamped photograph of the filter strip that c learty shows the type of vegetation that is present. n j L r 5. A oonstruction sequence that shows how the level spreader will be protected from sediment until the entire drainage area is stabilized. AP. 6. The supporting calculations. 7. A copy of the signed and notarized operation and maintenance (0&M) agreement. Td ? r 4-6t o r 0,612 8. A copy of the deed restrictions (if required). 0r- F, 0" r?/\ r Form SW401-Level Spreader, Filter Strip, Restored Riparian Buffer-Rev.S Part III, page 4 of 4 - HYDRAULIC RESULTS Discharge cfs Peak Flow Period threl Velocity (fps Area (sq R) Hydraufc Radi R Normal De h R 0.4 24.0 548 0.62 0.22 0.27 L- Bottom 1.0 WKM•200R Not to Scale Reach Mattig Type tahityAnalys' Vegetation CharacterieUcs Pemusbb Calculated Safety Factor Remarks Staple Pattern Phete Class; Type ensiy [ Shear Sliest ( Sheer Slim ?f) Straight Unreilorced Vegetation D Sod ;5-95% 3.33 0.68 4.89 STABLE Soi Clay 0070 0.054 1.30 STABLE Back to Input Screen i P v ?l U 3? . ? U, 22 p, i? ----------- ------------ - a y? - ------------- ------------- ----------- Page 1 of 1 -? ' 4 a k. yak m http://www.axcessmypics.com/photos/photo02/3b/0b/3316cf474526.jpg 1/7/2009