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Home My WebLink AboutSW3221203_Supplement-EZ Form_20221216SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name McCanless Village 2 Project Area ac 21.49 3 Coastal Wetland Area ac 0 4 Surface Water Area ac 0 5 Is this project High or Low Density? High 6 1 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of v etated setbacks provided feet 30 8 Will the vegetated setback remain vegetated? Yes 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 1 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 113ayfilter 26 lFilterra FORMS LOADED 27 1 Name and Title: 31 JPhone numbers : 32 Email: y Design Group, PLLC ,16 Foxbridge Dr dington, NC 28104 910-840-2661 Certification Statement: I certify, under penalty of law that this Supplement-E2 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. oFES3/& SEAL 048418 •/�` �'VGINEE� Z' Sign f Designer IZ-13- ZZ Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this project have low density areas? No 4 If so, number of low density drainage areas 0 5 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Type of SCM Entire Site 1 4 Wet and 5 Total drainage area (sq ft 533610 533610 6 Onsite drainage area (sq ft 507140 7 Offsite drainage area (sq ft) Total BUA in project (sq ft New BUA on subdivided lots (subject to s ft) New BUA not on subdivided lots (subject to sf Offsite BUA (sq ft Breakdown of new BUA not on subdivided lots: - Parking (sq ft - Sidewalk (sq ft - Roof (sq ft 26470 8 219525 sf 218655 sf 9permitting) 219525 sf 218655 sf 10permitting) sf sf 11 sf 18529 sf 12 sf sf sf sf sf sf - Roadway s ft 87670 sf 86800 sf - Future (sq ft sf sf - Other, please specify in the comment box below (sq ft sf sf 13 New infiltrating permeable pavement on subdivided lots (sq ft sf sf 14 New infiltrating permeable pavement not on subdivided lots s ft) Existing BUA that will remain (not subject to s ft sf sf 15permitting) sf sf 16 Existing BUA that is already permitted (sq ft sf sf 17 Existing BUA that will be removed (sq ft sf sf 18 Percent BUA 23% 44% 19 Design storm inches 1.0 in 20 Design volume of SCM cu ft 21 lCalculation method for design volume ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): 65497 cf Hydrocad WET PO N D 11 Drainage area number 1 2 Minimum required treatment volume cu ft 20012 cf GENERAL MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? Yes 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V)? 3:1 6 Does the SCM have retaining walls, gabion walls or other en ineered side slopes? Are the inlets, outlets, and receiving stream protected from erosion 0-year storm)? 1 Is there an overflow or bypass for inflow volume in excess of the design volume? What is the method for dewatering the SCM for maintenance? NO 7 Yes 8 Yes Drawdown Orifice Yes 9 10 If applicable, will the SCM be cleaned out after construction? 11 Does the maintenance access comply with General MDC (8)? Yes 12 Does the drainage easement comply with General MDC (9)? Yes 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC (10)? N/A 14 Is there an O&M Agreement that complies with General MDC (11)? Yes Yes 15 Is there an O&M Plan that complies with General MDC (12)? 16 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensedprofessional? Yes WET POND MDC FROM 02H .1053 18 Sizing method used SA/DA 19 Has a stage/storage table been provided in the calculations? Yes 20 Elevation of the excavated main pool depth (bottom of sediment removal) (fmsl) 696.50 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 697.00 22 Elevation of the bottom of the vegetated shelf (fmsl) 700.00 23 Elevation of the permanent pool (fmsl) 700.50 24 Elevation of the top of the vegetated shelf (fmsl) 701.00 25 Elevation of the temporary pool (fmsl) 701.72 26 Surface area of the main permanent pool (square feet) 7406 27 Volume of the main permanent pool (cubic feet) 17888 cf 28 Average depth of the main pool (feet) 3.50 ft 29 Average depth equation used Equation 2 30 If using equation 3, main pool perimeter (feet) 31 If using equation 3, width of submerged veg. shelf (feet) 32 Volume of the forebay (cubic feet) 6403 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebay (inches) 48 in 35 Design volume of SCM (cu ft) 65497 cf 36 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) If weir, weir height (inches) If weir, weir length (inches) Drawdown time for the temporary pool (days) Are the inlet(s) and outlet located in a manner that avoids short- circuiting? Are berms or baffles provided to improve the flow path? 3 in 38 12 in 39 36 in 40 2.3 41 Yes 42 Yes 43 Depth of forebay at entrance (inches) 60 in 44 Depth of forebay at exit (inches) 54 in 45 Does water flow out of the forebay in a non -erosive manner? Yes 46 Width of the vegetated shelf (feet) 6 ft 47 Slope of vegetated shelf (H:V) 6:1 48 Does the orifice drawdown from below the top surface of the No permanentpool? the pond minimize impacts to the receiving channel from the 1- nstorm? Yes Are fountains proposed? (If Y, please provide documentation that No MDC(9) is met.) Is a trash rack or other device provided to protect the outlet system? Yes Are the dam and embankment planted in non -clumping turf grass? Yes Species of turf that will be used on the dam and embankment Bermuda 494-hr 50 51 52 53 54 Hasa planting plan been provided for the vegetated shelf? Yes ADDITIONAL INFORMATION 55 Please use this space to provide any additional information about the wet pond(s):