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Home My WebLink AboutSW5210603_Supplement-EZ Form_20210817SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Duck Thru at Spring Hope 2 Project Area ac 4.87 3 Coastal Wetland Area ac 4 Surface Water Area ac 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 1 Width of vegetated setbacks provided (fee 8 Will the vegetated setback remain vegeta 10 GIs streambank stabilization proposed on this 50 N/A NCAC 02H.1003 4 c-d ? N/A eject? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell 13 Wet Pond 1 14 Stormwater Wetland 15 Permeable Pavement 16 ISand 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 StormFi[ter 24 Silva Cell 25 Bayfilter 26 Filterra FORMS LOADED DESIGNER CERTIFICATI;Q 27 Name and Title: J. Michael Stocks, PE President 28 Organization: Stocks Engineering, PA 29 Street address: 801 East Washington Street 30 City, State, Zip: Nashville, NC 27856 31 Phone numbers : 252.459.8196 32 Email: mstocks@stocksengineering.com 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. of Designer Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this roiect have low densit areas? No 4 F5 If so, number of low densitydrainage areas 0 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM Wet Pond 5 Total drainage area (sq ft) 212231 189245 6 Onsite drainage area (sq ft 212231 183420 7 Offsite drainage area (sq ft 0 5845 8 Total BUA in project (sq ft) 158955 sf 156682 sf 9permitting) New BUA on subdivided lots (subject to s ft 158955 sf 156682 sf 10 New BUA not on subdivided lots (subject to permitting) (sf) 11 Offsite BUA (sq ft sf sf 12 Breakdown of new BUA not on subdivided lots: - Parking (sq ft 152559 sf 150286 sf - Sidewalk (sq ft 2196 sf 2196 sf - Roof (sq ft 4200 sf 4200 sf - Roadway s ft - Future (sq ft - Other, please specify in the comment box below (sq ft 13 New infiltrating permeable pavement on subdivided lots (sq ft 14 New infiltrating permeable pavement not on subdivided lots (sq ft 15permitting) Existing BUA that will remain (not subject to s ft 16 lExistina BUA that is already permitted (sq ft 17 Existing BUA that will be removed (sq ft 18 Percent BUA 75% 83% 19 Design storm inches 1.0 in 20 Design volume of SCM cu ft 12549 cf 21 Calculation method for design volume Simple ADDITIONAL INFORMATION Please use this space to provide any additional information about Ithe 22 drainage area(s): WET POND 1 11Drainage area number 1 21 Minimum reauired treatment volume (cu ft) 12534 cf NERAL 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 engineered side slopes? No 7 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes 9 What is the method for dewatering the SCM for maintenance? Pump (preferred) 10 If applicable, will the SCM be cleaned out after construction? Yes 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 15 Is there an O&M Plan that complies with General MDC (12)? Yes 161 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensedprofessional? Yes 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 251.00 21 Elevation of the main pool bottom (top of sediment removal) (fmsl) 252.00 22 Elevation of the bottom of the vegetated shelf (fmsl) 259.00 23 Elevation of the permanent pool (fmsl) 260.00 24 Elevation of the top of the vegetated shelf fmsl 260.00 25 Elevation of the temporary pool (fmsl) 261.40 26 Surface area of the main permanent pool (square feet 5762 27 Volume of the main permanent pool (cubic feet) 19092 cf 28 Avera a depth of the main pool feet 3.00 It 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 3157 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebay inches 48 in 351 Design volume of SCM (cu ft) 12549 cf 36 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) 2 in 38 If weir, weir height inches 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days) 2.4 41 Are the inlet(s) and outlet located in a manner that avoids short- arcuitin ? Yes 42 Are berms or baffles provided to improve the flow path? No 43 Depth of forebay at entrance (inches) 255 in 44 Depth of forebay at exit (inches) 259 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 permanentpool? Yes 49 Does the pond minimize impacts to the receiving channel from the 1- r, 24-hr storm? Yes 50 Are fountains proposed? (If Y, please provide documentation that MDC 9 is met. No 51 Is a trash rack or other device provided to protect the outlet system? Yes 52 Are the dam and embankment planted in non -clumping turf grass? Yes 53 Species of turf that will be used on the dam and embankment Centipede 54 Hasa plantinq plan been provided for the vegetated shelf? Yes ADDITIONAL INFORMATION IF 55 Please use this space to provide any additional information about the wet pond(s): Wet Pond 3 3:55 PM 8/12/2021