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Home My WebLink AboutSW5231001_Supplement-EZ Form_20231008 SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Economy 3 Expansion 2 Project Area(ac) 78.23 3 Coastal Wetland Area(ac) _ 0 4 Surface Water Area(ac) 0 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 Wdth of vegetated setbacks provided(feet) 50 8 WII 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 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: Timothy S.Kennerly,PE 28 Organization: _ Kennerly Engineering&Design,Inc. 29 Street address: 12133 N NC HWY 150,Ste.F 30 City,State,Zip: Wnston-Salem,NC 27127 31 Phone number(s): (336)775-2118 32 Email: timothy.kennerly@kennerlyengineering.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 \\\\11111111//, SEAL • — Signature of Designer 29317 :>- ; :gyp .!VCINEct••• ,tiYS. KE G.\\ `��ZZ/Z3 //l/lllllll\\ Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so,number of drainage areas/SCMs _ 7 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 5 4 Type of SCM SGW SGW SGW SGW SGW 5 Total drainage area(sq ft) 485,694 550,598 265,716 641,203 515,750 6 Onsite drainage area(sq ft) 485,694 550,598 265,716 641,203 515,750 7 Offsite drainage area(sq ft) 0 0 8 Total BUA in project(sq ft) 485694 sf 550598 sf 265716 sf 641203 sf 515750 sf New BUA on subdivided lots(subject to 9 permitting)(sq ft) New BUA not on subdivided lots(subject to 10 permitting)(sf) 485694 sf 550598 sf 264716 sf 641203 sf 370695 sf 11 Offsite BUA(sq ft) 12 Breakdown of new BUA not on subdivided lots: -Parking(sq ft) 485694 sf 550598 sf 264716 sf 641203 sf 370695 sf -Sidewalk(sq ft) -Roof(sq ft) -Roadway(sq 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 15 permitting)(sq ft) 145055 sf 16 Existing BUA that is already permitted(sq ft) 17 Existing BUA that will be removed(sq ft) 18 Percent BUA 100% 100% 100% 100% 100% 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) 251752 cf 256070 cf 126503 cf 368117 cf 249473 cf 21 Calculation method for design volume Total Storage Total Storage I Total Storage Total Storage Total Storage ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so,number of drainage areas/SCMs _ 7 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 6 7 4 Type of SCM SGW SGW 5 Total drainage area(sq ft) 283,576 665,161 6 Onsite drainage area(sq ft) 283,576 665,161 7 Offsite drainage area(sq ft) 8 Total BUA in project(sq ft) 286576 sf 665161 sf New BUA on subdivided lots(subject to 9 permitting)(sq ft) New BUA not on subdivided lots(subject to 10 permitting)(sf) 283576 sf 665161 sf 11 Offsite BUA(sq ft) 12 Breakdown of new BUA not on subdivided lots: -Parking(sq ft) 283576 sf 665161 sf -Sidewalk(sq ft) -Roof(sq ft) -Roadway(sq 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 15 permitting)(sq ft) 16 Existing BUA that is already permitted(sq ft) 17 Existing BUA that will be removed(sq ft) 18 Percent BUA 100% 100% 19 Design storm(inches) 1.0 in 1.0 in 20 Design volume of SCM(cu ft) 114059 cf 233636 cf 21 Calculation method for design volume Total Storage Total Storage ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): SUBMERGED GRAVEL WETLANDS 1 Drainage area number 1 2 Minimum required treatment volume(cu ft) 38451 53589 21036 50762 40830 22450 52689 ` GENERAL MDC FROM 02H.1050 3 Is the SCM sized to treat the SW from all surfaces at build-out? Yes Yes Yes Yes Yes Yes Yes 4 Is the SCM located away from contaminated soils? Yes Yes Yes Yes Yes Yes Yes 5 What are the side slopes of the SCM(H:V)? 3:1 3:1 3:1 3:1 3:1 3:1 3:1 6 Does the SCM have retaining walls,gabion walls or other engineered side slopes? No No No No No No No 7 Are the inlets,outlets,and receiving stream protected from erosion(10-year storm)? Yes Yes Yes Yes Yes Yes Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes Yes Yes Yes Yes Yes Yes Cleanout in Cleanout in Cleanout in Cleanout in Cleanout in Cleanout in Cleanout in 9 control control control control control control control What is the method for dewatering the SCM for maintenance? structure structure structure structure structure structure structure 10 If applicable,will the SCM be cleaned out after construction? Yes Yes Yes Yes Yes Yes Yes 11 Does the maintenance access comply with General MDC(8)? Yes Yes Yes Yes Yes Yes Yes 12 Does the drainage easement comply with General MDC(9)? N/A N/A N/A N/A N/A N/A N/A 13 If the SCM is on a single family lot,does(will?)the plat comply with General MDC(10)? N/A N/A N/A N/A N/A N/A N/A 14 Is there an O&M Agreement that complies with General MDC(11)? Yes Yes Yes Yes Yes Yes Yes 15 Is there an O&M Plan that complies with General MDC(12)? Yes Yes Yes Yes Yes Yes Yes 16 Does the SCM follow the device specific MDC? N/A N/A N/A N/A N/A N/A N/A 17 Was the SCM designed by an NC licensed professional? Yes Yes Yes Yes Yes Yes Yes - Submerged Gravel Wetland MDC 18 Bottom of the SGW cell(fmsl) 319 315.5 319 335 346 331.5 336 19 Ponding depth of the design storm(inches) 24" 41" 43.44" 33.24" 40.8" 49.32" 37" 20 Surface area of the SGW(square feet) 24553 28518 11605 43292 26234 10970 38834 21 Design volume of SCM(cu ft) 251752 256070 126503 368117 249473 114059 233636 22 Is the SGW used for peak attenuation? Yes Yes Yes Yes Yes Yes Yes 23 Depth of peak attenuation over planting surface(in)(100-yr event) 62" 68" 65.5" 56" 64.56" 74" 60" 24 Height of peak attenuation outlet above the planting surface(in) 39" 42" 45" 36" 42" 51" 39" 25 Diameter of the underdrain pipes(if applicable) 6" 6" 6" 6" 6" 6" 6" 26 Does the design include Internal Water Storage(IWS)? Yes Yes Yes Yes Yes Yes Yes 27 if so,elevation of the top of the IWS(fmsl) 322.5 319 322.5 338.5 349.5 335 339.5 28 Elevation of the planting surface(fmsl) 323 319.5 323 339 350 335.5 340 Native Native Native Native Native Native Native 29 Wetland Wetland Wetland Wetland Wetland Wetland Wetland What type of vegetation will be planted? (grass,trees/shrubs,other)? Plants Plants Plants Plants Plants Plants Plants 30 Large Aggregate(Washed 57 Stone)Depth(inches) 36 36 36 36 36 36 36 31 Small Aggrgeate(Washed 78 Stone)Depth(inches) 6 6 6 6 6 6 6 32 Wetland Soil depth(inches) 6 6 6 6 6 6 6 33 Percentage of medium to coarse washed sand by volume 70 70 70 70 70 70 70 34 Percentage of fines(silt and clay)by volume <15 <15 <15 <15 <15 <15 <15 35 Percentage of organic matter by volume >15 >15 >15 >15 >15 >15 >15 36 Shredded Shredded Shredded Shredded Shredded Shredded Shredded mulch or mulch or mulch or mulch or mulch or mulch or mulch or Type of organic material compost compost compost compost compost compost compost 37 Phosphorus Index(P-Index)of media(unitless) <30 <30 <30 <30 <30 <30 <30 38 Will compaction be avoided during construction? Yes Yes Yes Yes Yes Yes Yes 39 Depth of mulch,if applicable(inches) N/A N/A N/A N/A N/A N/A N/A 40 Type of mulch,if applicable N/A N/A N/A N/A N/A N/A N/A 41 How many clean out pipes are being installed? 7 9 4 9 13 5 8 42 Type of pretreatment that will be used: Forebay Forebay Forebay Forebay Forebay Forebay Forebay