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HomeMy WebLinkAboutSW6230401_Supplement-EZ Form_20231017 SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION r 1 Project Name Phalanx Crossfit 2 Project Area(ac) 2.18 3 Coastal Wetland Area(ac) 0 4 Surface Water Area ac _ 0 5 Is this ro'ect High or Low Density? High 6 Does this project use an off-site SCM? No COMPLIANCE WITH 02H.1003(4) 7 JWJdth 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 strenmbank 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 A� 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: Jarrod E.Hilliard,PE,CFM,Owner 28 Organization: Hilliard EnCneering,PLLC 29 Street address: 3417 Winterwind Circle 30 JCity,State,Zip: Sanford,NC 27330 31 1 Phone number(s): 919-352-2834 32 Finail jhilliard@hilliardengineering.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. J Designer O .•'0kESs�o'' Signature of Desi r �Q SEAL 0.. 1 035670 4p% ..� \� Seal 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 Is all/part of this project subject to previous rule 5 versions? No rD DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM wet pond 5 ITotal drainage area(sq ft 125,361 32,944 6 Onsite drainage area(sq ft 32,944 32,944 7 Offsite drainage area(sq ft 92417 0 8 Total BUA in project(sq ft 36907 sf 29038 sf New BUA on subdivided lots(subject to permitting) 9 (sq ft New BUA not on subdivided lots(subject to 10 permitting) s 29038 sf 29038 sf 11 Offsite BUA(sq ft) 7869 sf 12 Breakdown of new BUA not on subdivided lots: Parking(sq ft) _ 16879 sf 16879 sf Sidewalk sq ft) 159 sf 159 sf Roof(sq ft 12000 sf 12000 sf Roadway s ft -Future(sq ft) -Other,please specify in the comment box below(sq ft New infiltrating permeable pavement on 13 subdivided lots(sq ft New infiltrating permeable pavement not on 14 subdivided lots(sq ft) Existing BUA that will remain(not subject to 15permitting) s ft 16 Existing BUA that is already permitted(sq ft 17 Existing BUA that will be removed(sq ft 18 Percent BUA 29% 88% 19 Desi n storm(inches) 1.0 in 20 Design volume of SCM(cu ft) 2326 cf 21 Calculation method for design volume simple ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): WET POND 1 Drainage area number 1 ___a,Minimum rewired treatment volume(cu ft) _ 2326 cf GENERAL MDC FROM 02H.1050 3 Is the SCM sized to treat the SW from all surfaces at build-out? 4:Is the SCM located away from contaminated soils? Yes 51 What are the side slopes of the SCM H: ? 3:1 Does the SCM have retaining walls,gabion walls or other engineered 6 side slopes? Yes Are the inlets,outlets,and receiving stream protected from erosion 7 10-year storm)? Yes Is there an overflow or bypass for inflow volume in excess of the 6 design_ volume? Yes 9 What is the method for dewatering the SCM for maintenance? Pump(preferred) 10I If applicable,will the SCM be cleaned out after construction? Yes 111 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 _ N/A General MDC 10? 14 Is there an O&M Agreement that complies with General MDC(11)? Yes 151 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 licensed professional? Yes ET 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) 363.50 21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 364.50 22 Elevation of the bottom of the vegetated shelf(fmsl) 370.50 231 Elevation of the permanent pool(fmsl) 370.50 24 Elevation of the top of the vegetated shelf(fmsl) 371.50 25 Elevation of the temporary pool(fmsl) 371.50 261 Surface area of the main permanent pool square feet) 2038 271 Volume of the main permanent pool(cubic feet) 6128 cf 28 Avera a depth of the main pool(feet) 3.01 ft 29 Avera a depth equation used Equation 2 301 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) 9"cf 33 Is this 15-20%of the volume in the main pool? Yes 34 Clean-out depth for forebay(inches) 36 in 35 Design volume of SCM(cu ft) 3511 cf 36 Is the outlet an orifice or a weir? Orifice 371 If orifice,orifice diameter(inches) 3/4" 38 If weir,weir height(inches) 39 If weir,weir length(inches) 40 Drawdown time for the tempos pool(days) 4.93 41 Are the inlet(s)and outlet located in a manner that avoids short- Yes circuiting? 42 Are berms or baffles provided to improve the flow path? No 43 Depth of forebay at entrance(inches) 42 in 44.Depth of forebay at exit(inches) 30 in 45'Does water flow out of the forebay in a non-erosive manner? Yes 46 Width of the vegetated shelf(feet) 6 ft 471 Slope of vegetated shelf(H:V) 6:1 48 Does the orifice drawdown from below the top surface of the permanent I? Yes 49 Does the pond minimize impacts to the receiving channel from the 1- Yes r,24-hr storm? 50 Are fountains proposed?(If Y,please provide documentation that No MDC 9 is met. 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 Has alanting 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). Wet Pond 1 2:30 PM 10/17/2023