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Home My WebLink AboutSW6221006_Supplement-EZ Form_20221025SUPPLEMENT-EZ COVER PAGE FORMS LOADED IPROJECT INFORMATION 1 Project Name 2 Project Area (ac) 3 Coastal Wetland Area ac 4 Surface Water Area ac 5 Is this project High or Low Density? 6 Does this project use an off -site SCM? +/-20,000-SF Distribution Facility Expansion for CCBCC-Fayetteville 13.7 0 0 High No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feet No surface water on project area 8 Will the vegetated setback remain vegetated? N/A 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? 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 Bayfilter IFilterra 25 26 FORMS LOADED IDESIGNER CERTIFICATION 27 Name and Title: 28 Organization: 29 Street address: 30 City, State, Zip: 31 Phone numbers : 32 Email: Ethan Hart, P.E. - Civil Engineer Fitts and Goodwin, Inc. 120 Corporate Blvd. West Columbia, SC 29169 (803) 331-2991 ehart(a-)strateaisse.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. Seal Signature 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 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 Entire Site 1 4 Type of SCM Wet Pond Wet Pond 5 JTotal drainage area (sq ft 596772 351529 6 Onsite drainage area (sq ft 596772 351529 7 Offsite drainage area (sq ft 0 0 8 Total BUA in project (sq ft 325828 sf 325828 sf 9 New BUA on subdivided lots (subject to ermitting) (sq ft 10 New BUA not on subdivided lots (subject to ermittin s 31798 sf 31798 sf 11 Offsite BUA (sq ft 12 1 Breakdown of new BUA not on subdivided lots: - Parking (sq ft 31798 sf 31798 sf - Sidewalk (sq ft - Roof (sq ft - Roadway s ft - Futures ft - Other, please specify in the comment box below (sq ft 294030 sf 13 New infiltrating permeable pavement on subdivided lots (sq ft 294030 sf 14 New infiltrating permeable pavement not on subdivided lots (sq ft 15permitting) Existing BUA that will remain (not subject to s ft 16 Existing BUA that is already permitted (sq ft 17 Existing BUA that will be removed (sq ft 18 Percent BUA 55% 93% 19 Design storm inches 1.0 in 1.0 in 20 Design volume of SCM cu ft 47195 cf 47195 cf 21 lCalculation method for design volume Simple Simple ADDITIONAL INFORMATION 22 Please use this space to provide any additional information about the drainage area(s): Expansion to existing site resulting in a net increase of 0.73-ac (31,798-sf) impervious area. WET POND Drainage area number 1 ]ra, Minimum re uired treatment volume cu ft 3850 cf GENL 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- ear storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the desi n 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 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 MMMA 18 Sizing method used HRT 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 Elevation of the main pool bottom (top of sediment removal) (fmsl) Elevation of the bottom of the vegetated shelf (fmsl) Elevation of the permanent pool (fmsl) Elevation of the top of the vegetated shelf (fmsl) Elevation of the temporary pool (fmsl) 85.50 86.00 21 22 90.13 23 90.63 24 91.13 25 93.63 26 Surface area of the main permanent pool (square feet) 10223 27 Volume of the main permanent pool (cubic feet) 28367 cf 28 Average depth of the main pool (feet) 3.22 ft 29 Average depth equation used Equation 3 30 If using equation 3, main pool perimeter (feet) 529.0 ft 31 If using equation 3, width of submerged veg. shelf (feet) 3.0 ft 32 Volume of the forebay (cubic feet) 4433 cf 33 Is this 15-20% of the volume in the main pool? Yes 34 Clean -out depth for forebay (inches) 37 in 35 Design volume of SCM (cu ft) 47195 cf 36 Is the outlet an orifice or a weir? Orifice 37 If orifice, orifice diameter (inches) 3 in 38 If weir, weir height (inches) 39 If weir, weir length (inches) 40 Drawdown time for the temporary pool (days) 2.31 41 Are the inlet(s) and outlet located in a manner that avoids short- circuiting? Yes 42 Are berms or baffles provided to improve the flow path? Yes 43 Depth of forebay at entrance (inches) 48 in 44 Depth of forebay at exit (inches) 43 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) _ Does the orifice drawdown from below the top surface of the permanentpool? 6:1 48 No 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? 52 Are the dam and embankment planted in non -clumping turf grass? 53 Species of turf that will be used on the dam and embankment Yes Yes Bermuda 54 Hasa planting plan been provided for the vegetated shelf? Yes ONAL INFORMATION 551 Please use this space to provide any additional information about the wet pond(s): Wet Pond 3 2:26 PM 10/25/2022