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Home My WebLink AboutSW6221002_Supplement-EZ Form_20221006SUPPLEMENT-EZ COVER PAGE )RMS LOADED iPROJECT INFORMATION 1_ Project Name 2 _I Project Area (ac) 3_ ICoastal Wetland Area (ac) 4 1Surface Water Area fee) 5 Is this ro ect H h or Low Deatsit ? 6 Does this project use an off -site SCM? Avonlea Subdivision 21.74 No COMPLIANCE WITH 02H .10.9,3(R) 7 lWidth of vegetated setbacks provided Ifeet) N/A lWill the vegetated setback remain vegetated? N/A 8 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 (c-d)? N/A 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell 13 Wet Pond 2 14 Stormwater Wetland 15 Permeable Pavement 16 Sand Filter 17 Rainwater Harvesting RWH 18 Green Roof 19 Level Spreader -Filter Strip LS-FS 20 Disconnected Impervious Surface (DIS) 21 Treatment Swale 22 Dry Pond 23 StormFilter 24 Silva Cell 25 Bayfilter 26 Filterra FORMS LOADED DESIGNER CERTIFICATION 27 i Name and Title: Donald L. Curry. Jr., PE / Project Manager 28 organization: Curry Engineering 29 Street address: 205 S. Fuguay Ave. 30 _ City, State, Zip: Fu ua-Varina NC 27526 Phone number(s): 919-552-0849 Email: don@curryeng.com 31 32 Certification Statement: I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that the information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here. ptd P.?�NtC Seal COO Signature of Designer Date JtFOP' �. 2-02-2 DRAINAGE AREAS 1 Is this a nigh denser project? Yes 2 If so, number of drainage areaslSCMs 2 _ 3 Does this project have low density areas? No _ 4 If so, number of low density drainage areas 0 Is allf.part of this project subject to previous rule 5 'versions? L No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 2 4 Toe of SCM Wet Pond Wet Pond Wet Pond 5 Total drainage area (sq ft 801072 528385 272687 6 Onsite drainage area (sq ft 801072 528385 272687 7 Offsite drainage area (sq ft) 0 0 0 8 Total BUA in project sq ft) 455050 sf 286294 sf 168756 sf 9 New BUA on subdivided lots (subject to permitting) jsq ft) 455050 sf 286294 sf 168756 sf 10permitting) New BUA not on subdivided lots (subject to s sf sf sf 11 Offsite BUA (sq ft) sf sf sf 12 Breakdown of new BUA not on subdivided lots: - Parking (sq ft) 3000 sf 3000 sf sf - Sidewalk (sq ft) 31089 sf 17774 sf 13315 sf - Roof (sq ft) 315000 sf 201000 sf 114000 sf - Roadway (sq ft) 95961 sf 54520 sf 41441 sf - Future (sq ft) sf sf sf - Other, please specify in the comment box below (sq ft) sf 10000 sf 6f jNew 13 infiltrating permeable pavement on subdivided Ilots s ft sf sf sf 14 New infiltrating permeable pavement not on subdivided lots (sq ft sf sf sf 15permitting) Existing BUA that will remain (not subject to s ft sf sf sf 16 Existing BUA that is already permitted (sq ft) sf sf sf 17 Existin BUA that will be removed (sq ft) sf sf sf 18 Percent BUA 57% 54% 62% 19 IDesign storm (inches) 1.0 in 1.0 in 1,0 in 20 i Design volume of SCM (cu ft) 40753 cf 25330 cf 15423 cf 21 Calculation method for design volume Simple Sim Simple Sim le ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): Pond #1: 10,000 sf impervious allocated for amenity WET POND 1 Drainage area number 1 2 62, Minimum 2Mired treatmeht volume cu ft23674 cf 13793 d ENNERALMOCFROM42H_ M 3 Is the SCM sized to treat the SW from all sw1aces at build -out? Yes Is the SCM located away from contaminated soils? Yes Yes 41 Yes 5; What are the side slopes of the SCM H:V ? 3:1 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No No 7i Are the inlets, outlets, and receiving stream protected from erosion Yes 10- ear storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes Yes 9 What is the method for dewatering the SCM for maintenance? Pump ( refp erred) Pump (preferred) 10.E If applicable, will the SCM be cleaned out after construction? I Yes Yes 11 Does the maintenance access comply with General MDC 8)? Yes Yes 121 Does the drainage easement comply with General MDC 9)? Yes Yes 13 If the SCM is on a single family lot, does (will?) the plat comply with No General MDC (10)? No 14 Is there an O&M Agreement that complies with General MDC (11)? Yes Yes 151 Is there an O&M Plan that complies with General MDC (12)? Yes as Yes 16 Does the SCM follow the device spec MDC? _ Yes 17 Was the SCM designed an NC licensed rufessitin�il? Yes Yes 1 B Sizing method used SA/DA SA47A 19 Has a sta a/storage table been provided in the calculations? Yes Yes 167.00 20 Elevation of the excavated main pool depth (bottom of sediment removal) fmsl 170.50 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 1 171.50 168.00 22i Elevation of the bottom of the vegetated shelf (fmsl) 176.00 172.50 231 Elevation of the permanent pool (fmsl) 176.50 173.00 24 Elevation of the top of the vegetated shelf fmsl 177.00 173.50 25 Elevation of the tem oraryool (fmsl) 178.00 174.30 26 Surface area of the main eermanent pool (square feet) 11460 7734 27 Volume of the main permanent pool cubic feet 31572 cf 21812 cf 28 Average depth of the main pool (feet) 3.23 ft 3.28 ft 29 Average depth equation used Equation 3 Equation 3 30 If using equation 3, main pool perimeter (feet) 1 594.0 ft 594.0 ft 31. If using equation 3, width of submerged veg. shelf_ feet 1 3.0 ft 3.0 ft 32[Volume of the foreba (cubic feet) 1 4882 cf 4070 cf 33 Is this 15-20% of the volume in the mainpool? 1 Yes Yes 34 Clean -out depth for forebay (inches) 12 in 12 in 35 Design volume of SCM cu ft) 25330 d 15423 d 36 Is the outlet an orifice or a weir? Orifice Orifice 37 If orifice, orifice diameter (inches) 2 in 2 in 38 If weir, weir height (inches) in In 39 If weir, weir len th (inches in in 40 Drawdown time for the tempora ool (days) 3.12 3.37 41 Are the inlet(s) and outlet located in a manner that avoids short- circuiting? Yes Yes 42 Are berms or baffles provided to improve the flow ath? No No 43 Depth of forebay at entrance (inches) 30 in 30 in 44 Depth of forebay at exit (inches) 36 in 36 in 45 Does water flow out of the forebay in a non -erosive manner? Yes Yes 461 Width of the vegetated shelf (feet) 6 ft 6 ft 47 Slope of vegetated shelf H:V 6:1 6:1 48 Does the orifice drawdown from below the top surface of the permanentpool? Yes Yes 49 Does the pond minimize impacts to the receiving channel from the 1- r, 24-hr storm? Yes Yes 50 Are fountains proposed? (If Y, please provide documentation that MDC(9) is met.) No No 51 Is a trash rack or other device provided to protect the outlet system? Yes Yes 52 Are the dam and embankment planted in non -clumping turf grass? Yes Yes 53 Species of turf that will be used on the dam and embankment Fescue or Centipede Fescue or Centipede Yes 54.Has a planting plan beers provJdLd for the v etated shelf? Yes ADD TiONAL.INFDR[NATION Please use this space to provide any additional information about the 55wet pand[s]: