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Home My WebLink AboutSW1231201_Supplement-EZ Form_20240626 SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Bobby N Setzer State Fish Hatchery Renovation 2 Project Area(ac) 41.17 _ 3 Coastal Wetland Area(ac) 0 4 Surface Water Area(ac) 3.91 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 14 Stormwater Wetland 1 - 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: Ben Cathey 28 Organization: McGill Associates 29 Street address: 55 Broad St. 30 City,State,Zip: Asheville,NC 28801 31 Phone number(s): 828-252-0575 - 32 Email: Ben.Cathey@mcgillassociates.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 e.0111111111/1N e -. --. 7----2.----Th ..0,0707-"'" SEAL _ Signature of Designer �7/ 03447 %, • FNCINEt.. 7////l111I i3,ti31'111\\\ 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 FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM _ SW Wetland 5 Total drainage area(sq ft) 1,793,365 207,867 6 Onsite drainage area(sq ft) 1,793,365 207,867 7 Offsite drainage area(sq ft) 0 0 8 Total BUA in project(sq ft) 379602 sf 133351 sf New BUA on subdivided lots(subject to 9 permitting)(sq ft) N/A N/A _ New BUA not on subdivided lots(subject to 10 permitting)(sf) 242627 sf 80128 sf 11 Offsite BUA(sq ft) N/A N/A 12 Breakdown of new BUA not on subdivided lots: -Parking(sq ft) 37801 sf 3981 sf -Sidewalk(sq ft) 4485 sf 2889 sf -Roof(sq ft) 175855 sf 73258 sf -Roadway(sq ft) 24486 sf N/A -Future(sq ft) N/A N/A -Other,please specify in the comment box below(sq ft) N/A N/A New infiltrating permeable pavement on 13 subdivided lots(sq ft) N/A N/A New infiltrating permeable pavement not on 14 subdivided lots(sq ft) N/A N/A Existing BUA that will remain(not subject to 15 permitting)(sq ft) 136975 sf 53223 sf 16 Existing BUA that is already permitted(sq ft) N/A N/A 17 Existing BUA that will be removed(sq ft) 160848 sf 38187 sf 18 Percent BUA 21% 64% 19 Design storm(inches) 1.0 in 20 Design volume of SCM(cu ft) 9308 cf 21 Calculation method for design volume Discrete NRCS ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): Other Impervious=hatchery operations/raceways #10 Note:Includes existing BUA that is being replaced #17 Note:Includes BUA that is being removed and replaced by'new'BUA STORMWATER WETLAND 1 Drainage area number SCM 1 2 Minimum required treatment volume(cu ft) 8888 cf GENERAL MDCROM 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 No engineered side slopes? Are the inlets,outlets,and receiving stream protected from erosion 7(10-year storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the Yes design volume? 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)? N/A 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 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 licensed professional? Yes ,§TOJtMWWATER WETLAND MDC FR0NL02H 1054 18 Design volume of SCM(cu ft) 9,308 19 Are the inlet(s)and outlet located in a manner that avoids short- Yes circuiting? 20 Are berms or baffles provided to improve the flow path? No 21 Does the orifice drawdown from below the top surface of the Yes permanent pool? Does the wetland minimize impacts to the receiving channel from the 22 Yes 1-yr,24-hr storm? 23 Is a trash rack or other device provided to protect the outlet system? Yes Elevations 24 Elevation,peak attenuation above temporary pool(if applicable) 2336.00 (fmsl) 25 Elevation,temporary pool(top of the temporary inundation zone) 2334.25 (fmsl) 26 Elevation,permanent pool(top of the shallow water zone)(fmsl) 2333.00 27 Elevation,bottom of shallow water zone(fmsl) 2332.25 28 Elevation,bottom of forebay deep pool at deepest point(at forebay 2329.67 entrance)(fmsl) 29 Elevation,bottom of forebay deep pool at shallowest point(at 2330.17 forebay exit)(fmsl) 30 Elevation,bottom of non-forebay deep pool at deepest point(fmsl) 2330.00 Planting Zones 31 Area,total surface area of the SW wetland at temporary pool elev. 10,203.00 (sq ft) 32 Area,temporary inundation zone at temporary pool elev.(sq ft) 3,823.00 33 Area,shallow water zone at temporary pool elev.(sq ft) 4,368.00 34 Area,forebay at temporary pool elev.(sq ft) 1,183.00 35 Area,non-forebay deep pool at temporary pool elev.(sq ft) 829.00 36 Percent area provided,temporary inundation zone(should be 30- 37% 45%) 37 Percent area provided,shallow water zone(should be 35-45%) 43% 38 Percent area provided,deep pool(forebay)(should be 10-15%) 12% 39 Percent area provided,deep pool(non-forebay)(should be 5-15%) 8% Depths and Outlet 40 Peak attenuation depth above temporary inundation zone(inches) 21 in 41 Temporary inundation zone depth(temporary pool to permanent 15 in pool)(inches) 42 Shallow water zone depth(permanent pool to bottom of wetland) 9 in (inches) 43 Depth,forebay at entrance(permanent pool to bottom of forebay 40 in entrance)(inches) 44 Depth,forebay at exit(permanent pool to bottom of forebay exit) 34 in (inches) 45 Depth,non-forebay deep pools(permanent pool to deep pool 36 in bottom)(inches) 46 If there is an orifice,diameter(inches) See Note 47 If there is a weir,weir height(inches) 48 If there is a weir,weir length(inches) 49 Drawdown time for the temporary pool(days) 2.75 Wetland 3 10:45 AM 6/26/2024 STORMWATER WETLAND Sall and Plants 50 Soil amendment depth(inches) __ 121n 5l Has a salt amendment speciffcatfon been provided?_ _ Yes 52 Has a landscaping plan that meets SW Wetland MDC(12)been Yes provided? 53 Number of plants per 200 square feet(#)In the shallow water zone: Does the temporary inundation zone planting comply with SW 54 Wetland MDC(14)7 Yes 55 Are the dam structure and temporary fill slopes planted in non-- Yes clumping turfgrass? 66 Will cattails be planted In the wetland? No ADDm oNAL INFORMATION Please use this space to provide any additional information about 57 the stormwaterwetland(s): Line#12:No easement is provided because it is not privately owned land. Line#46:Orifice is 1.5"in diameter, Line#53:83.8 plants per 200 sf have been provided in the shallow water zone(1,830 plants per 4,368 st) • Wetland 4 10:45 AM 6/26/2024