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Home My WebLink AboutSWA000231_Supplement-EZ Form_20231128 SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Rusher Farms Industrial Development 2 Project Area(ac) 73.15 Acres 3 Coastal Wetland Area(ac) 0 4 Surface Water Area(ac) 4.17 5 Is this project High or Low Density? High 6 Does this project use an off-site SCM? No COMPLIANCE WITH 02H.1003(4) 7 Width of vegetated 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 4 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 Name and Title: Nicholas Lubinecky/Land Development Engineer 28 Organization: ARCO DB Companies,Inc. 29 Street address: 4000 Westchase Blvd. 30 City,State,Zip: Raleigh,NC 27607 31 Phone number(s): 984.960.6669 32 Email: nlubinecky@arcodb.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. Designer rQ != SEAL • _ Signature of Designer 55103 = y// �\?\\�SM - 6/19/2023 rr I \ Seal Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so,number of drainage areas/SCMs _ 4 3 Does this project have low density areas? _ No 4 If so,number of low density drainage areas _ 0 Is all/part of this project subject to previous rule 5 versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 2 3 4 4 Type of SCM N/A Wet Pond Wet Pond Wet Pond Wet Pond 5 Total drainage area(sq ft) 4417980 _ 875992 702187 356320 283140 6 Onsite drainage area(sq ft) 3186419 865080 702187 273039 283140 7 Offsite drainage area(sq ft) 1231561 sf 10912 0 83281 0 8 Total BUA in project(sq ft) 1671397 sf 677794 sf 421225 sf 317552 sf 254826 sf New BUA on subdivided lots(subject to 9 permitting)(sq ft) sf sf sf sf sf New BUA not on subdivided lots(subject to 10 permitting)(sf) 1671397 sf 677794 sf 421225 sf 317552 sf 254826 sf 11 Offsite BUA(sq ft) sf sf sf sf sf 12 Breakdown of new BUA not on subdivided lots: -Parking(sq ft) 949937 sf 328036 sf 221251 sf 155312 sf 245338 sf -Sidewalk(sq ft) 18705 sf sf 15942 sf sf 2763 sf -Roof(sq ft) 620945 sf 338148 sf 113832 sf 162240 sf 6725 sf -Roadway(sq ft) 81810 sf 11610 sf 70200 sf sf sf -Future(sq ft) sf sf sf sf sf -Other,please specify in the comment box below(sq ft) sf sf sf sf sf New infiltrating permeable pavement on 13 subdivided lots(sq ft) sf sf sf sf sf New infiltrating permeable pavement not on 14 subdivided lots(sq ft) sf sf sf sf sf Existing BUA that will remain(not subject to 15 permitting)(sq ft) sf sf sf sf sf 16 Existing BUA that is already permitted(sq ft) sf sf sf sf sf 17 Existing BUA that will be removed(sq ft) sf sf sf sf sf 18 Percent BUA 38% 77% 60% 89% 90% 19 Design storm(inches) 1.0 in 1.0 in 1.0 in 1.0 in 1.0 in 20 Design volume of SCM(cu ft) 134585 cf 54481 cf 34515 cf 25297 cf 20292 cf _ 21 Calculation method for design volume Simple Method Simple Method Simple Method Simple Method Simple Method ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): N/A WET POND I 1 Drainage area number 1 2 3 4 2 Minimum required treatment volume(cu ft) 54481 cf L 34515 cf 25297 cf 20292 cf GENERAL MDC FROM 02H.1050 3 Is the SCM sized to treat the SW from all surfaces at build-out? Yes Yes Yes Yes 4 Is the SCM located away from contaminated soils? Yes Yes Yes Yes 5 What are the side slopes of the SCM(H:V)? 3:1 3:1 3:1 3:1 6 Does the SCM have retaining walls,gabion walls or other engineered No No No No side slopes? 7 Are the inlets,outlets,and receiving stream protected from erosion Yes Yes Yes Yes (10-year storm)? 8 Is there an overflow or bypass for inflow volume in excess of the Yes Yes Yes Yes design volume? 9 What is the method for dewatering the SCM for maintenance? Pump(preferred) Pump(preferred) Pump(preferred) Pump(preferred) 10 If applicable,will the SCM be cleaned out after construction? Yes Yes Yes Yes 11 Does the maintenance access comply with General MDC(8)? Yes Yes Yes Yes 12 Does the drainage easement comply with General MDC(9)? I Yes Yes Yes Yes 13 If the SCM is on a single family lot,does(will?)the plat comply with N/A N/A N/A N/A General MDC(10)? 14 Is there an O&M Agreement that complies with General MDC(11)? Yes Yes Yes Yes 15 Is there an O&M Plan that complies with General MDC(12)? Yes Yes Yes Yes 16 Does the SCM follow the device specific MDC? Yes Yes Yes Yes 17 Was the SCM designed by an NC licensed rofessional? Yes k Yes Yes Yes WET POND MDC FROM 02H.1053 _ 18 Sizing method used SA/DA SA/DA SA/DA SA/DA 19 Has a stage/storage table been provided in the calculations? Yes Yes Yes Yes 20 Elevation of the excavated main pool depth(bottom of sediment 670.50 639.50 639.50 637.50 removal)(fmsl) 21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 671.00 640.00 640.00 638.00 22 Elevation of the bottom of the vegetated shelf(fmsl) 675.00 644.00 645.00 642.00 23 Elevation of the permanent pool(fmsl) 675.00 644.00 645.00 642.00 24 Elevation of the top of the vegetated shelf(fmsl) 676.00 645.00 646.00 643.00 25 Elevation of the temporary pool(fmsl) 676.51 645.73 646.64 643.39 26 Surface area of the main permanent pool(square feet) 22198 10691 8825 7906 27 Volume of the main permanent pool(cubic feet) 57443 cf 36191 cf 31581 cf 25868 cf 28 Average depth of the main pool(feet) 3.02 ft 3.39 ft 3.58 ft 3.27 ft 29 Average depth equation used Equation 2 Equation 2 Equation 2 Equation 2 30 If using equation 3,main pool perimeter(feet) 1570.0 ft 527.0 ft 586.0 ft 399.0 ft 31 If using equation 3,width of submerged veg.shelf(feet) 32 Volume of the forebay(cubic feet) 8645 cf 6235 cf 5897 cf 4624 cf 33 Is this 15-20%of the volume in the main pool? Yes Yes Yes Yes 34 Clean-out depth for forebay(inches) 72 in 48 in 36 in 48 in 35 Design volume of SCM(cu ft) 54481 cf 34515 cf 25297 cf 20292 cf 36 Is the outlet an orifice or a weir? Orifice Orifice Orifice Orifice 37 If orifice,orifice diameter(inches) 4.00 in 3.00 in 2.00 in 1.75 in 38 If weir,weir height(inches) 39 If weir,weir length(inches) 40 Drawdown time for the temporary pool(days) 2.1 2.2 3.8 4.3 41 Are the inlet(s)and outlet located in a manner that avoids short- Yes Yes Yes Yes circuiting? 42 Are berms or baffles provided to improve the flow path? No No No No 43 Depth of forebay at entrance(inches) 72 in 48 in 36 in 48 in 44 Depth of forebay at exit(inches) 60 in 36 in 30 in 36 in 45 Does water flow out of the forebay in a non-erosive manner? Yes Yes Yes Yes 46 Width of the vegetated shelf(feet) E ft E ft E ft 6 ft 47 Slope of vegetated shelf(H:V) 6:1 6:1 6:1 6:1 48 Does the orifice drawdown from below the top surface of the No No No No permanent pool? 49 Does the pond minimize impacts to the receiving channel from the 1- Yes Yes Yes Yes yr,24-hr storm? 50 Are fountains proposed?(If Y,please provide documentation that No No No No MDC(9)is met.) 51 Is a trash rack or other device provided to protect the outlet system? Yes Yes Yes Yes 52 Are the dam and embankment planted in non-clumping turf grass? Yes Yes Yes Yes 53 Species of turf that will be used on the dam and embankment Bermuda Bermuda Bermuda Bermuda 54 Has a planting plan been provided for the vegetated shelf? Yes Yes Yes Yes ADDITIONAL INFORMATION 55 Please use this space to provide any additional information about the wet pond(s): N/A 2