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Home My WebLink AboutSW5200401_Supplement-EZ Form_20211012SUPPLEMENT-EZ COVER PAGE ORMS LOvvw !PROJECT INFORMATION 1 Project Name _ Moss Buildings 2 Project Area CaC) _ 4.64 3 Coastal Wetland Area (ac) 4 Surface Water Area (ac) 0.35 5 Is this proje.Ct.kgh or Low DensEty/7 High 6 Does this pra}eet use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided (feet) 44 8 Will the vegetated setback remain vegetated? Yes 9 If BUA is proposed in the setback, does it meet NCAC 0211_1003 4)(c-d)? N/A 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 -Infiltration Cell 13 Wet Pond 14 Stormwater Wetland 1 15 Permeable Pavement r 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 _ Filterra 25 26 FORMS LOADED DESIGNER CERTIFICATION 27 IName and Title: 28 Organization: 29 Street address: 30 ICity, State, Zip: 31 1 Phone number(s): 1 32 [Email: Jon Frazier, PE / FILM Engineering, Inc. _ PO Box 91727 Raleigh, NC 27675 919,610.1051 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 forth 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. '''GAF{pC `��• _ 5 ' `rOti •,,EGiNa <¢� '•• g7HAN O '+,rrEiiEE'. Seal Signature signer Date lol-7 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, nGfnt]Hr of l6w density dr&ha a areas Is all/part of this project subject to previous rule 5 aversions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 4 1 Type of SCM Wetland 5 Total drainage areas R) 288.966 164446 6 Onsite drainage area (sq ft) 202.451 162336 7 Offsite drainage area (sq ft) 86.515 2110 8 _ Total BUA in project (sq. ft) 146514 sf 115978 sf 9permitting) New BUA on subdivided lots (subject to s ft 10permitting) New BUA not on subdivided lots (subject to s 146514 sf 115978 sf 11 Offsite BUA (sq ft) 29577 sf 2110 sf 12 Breakdown of new BUA not on subdivided lots: Parking (sq ft 86150 sf 82993 sf - Sidewalk (sq ft 13396 sf 10785 sf Roof (sq ft) 22200 sf 22200 sf Roadway sq ft 24768 sf Future.(sq ft) Other, please specify in the comment box below (sq ft 13 New infiltrating permeable pavement on subdivided lots sq ft 14 New infiltrating permeable pavement not on subdivided lots (sq ft 15permitting) Existing BUA that will remain (not subject to s ft) 22283 sf 16 Existing BUA that is already ermitted (sq ft 17 Existing BUA that will be removed (sq ft) 8489 sf 8489 sf 18 Percent BUA 51% 70% 19 Design storm (inches) 1.0 in 20 Desi n votume of SCM (cu ft 7751 cf 21 'Calcu a ion me od or esign volume HydroCAU ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): 10,785 sf of sidewalk BUA shown in the Drainage Area 1 column includes the 2,110 sf of off -site BUA. STORMWATER WETLAND 1 Dray ge area number DA-1A 2 Minimium recluTEd treatment volume cu ff is�ad 'E 3 Is the SCM 8reed to treat the SW from all surfaces at build -out? Yes 4 Is the 850 located away from contaminated soils? Yes 5, What are the side Sin es of the SCM (H:V.1? 31 6'Does tha SibA have retaining walls, gabion walls or other No ,er,<jneered side slopde_ _ l Are the inlets outlets. and receiving stream protected from erosion Yes '. (1 D-year starm )7 I 8 18 there an overflow or bypass for inflow vdlume in excess dF•1h8: Yes dasign.valurre- _ �9! W_ et is the method for dawaW. ng the SW for maintenance? FUMF (Tx6fefre54 1011E 9pprioghte;yj me 13CM be cleaned out after construction? Yes 11 [Does the maintenance access comply with General MDC BI_), 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 Yes General MDC (10)? _ 14 Is there an On 0&MA2reement that 132mplies with General MDC 11)? Yes 15 Is there an O&M Plan that complies with General MDC (12)? Yes 16 Does the SCM folliew the device speCdic MDC? Yes 17 Was the SGM designed by an NC licensed r-afesslonal? Yes R17MU69WATFR UFF'tt Vllo AMC FRnY mN -WU 18 Design volume of SCM (¢u ft) 7751 19 Are the nlet(s) and outlet located in a manner that avoids short- circuiting? Yes 20 Are.berns or baffles pmvkW to fin rWA ll1e flow ptltn7 I Yes 21 Does the orifice drawdown from below the top surface of the permanent oh Yes 22 Does e wetTand minimize impacts to the receiving channel From the 1- r, 24[h-hr storm? Yes Is a trash rack or other device Provided to protect the outlets stem? Yes 23 }'�6Y7S10hi peak attenuation above temporary pool (if applicable) (frrt$Fi I 29821 _ .,IV, urli temporary pool (top Urtha.1wnwirmy inundali9n zCrle} f 29725 Eleyallbn, perltisari nl pDd{ { 60 of the shallow water zona. {fms1 296.00 Elevation, bottom of shallow water zone fma4 295,25 Elevation, bottom of forebay deep pool at deepest point (at forebay entrance fmsl 293.00 Elevation, bottom of forebay deep pool at shallowest point (at 294 00 forebay exit) (fmsl) Elevation. bottom of.riOn-Forebay deep pwl at di§epasj point fmsq 284.p0 i7he.r 31 Area, total surface area of the SW wetland at temporary pool elev 6,978,00 1(sq ft) 32'Areaea, temporary inuF datlon zone at tem prar pppl elev. s ft) Z T1App Ar. shallow water zone at Iemppmiy pml elev Isq ft) 3134,00 33 34 Area;T= attgm m of elev s f1) _ 99600 Area, non-forebay deep fool at temporary pool elev (sq ft) 734 00 Percent area provided, temporary inundation zone (should be 30- 30% 45 35 36 37 Percent area provided shallow water zone (should be 35-05%) 45% Percent area provided, deep papa (fora . ) (should be 10-15%) 159I+. 36 391 Percent area provided, deep pgot (non-foreb8y) (Sr1011tr,( tie 5-15%•) _ T T%s epthsmW Olrfiet 401 Paak depth a6pve temporary inundation zone ginGhes) 12 in _attenuation Temporary inundation zone depth (tamporary.pool to permanent 41 Imohee 15 in 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 36 in entrance) (inches) 44;Deplh, forebay at exit (permanent pool to bottom of forebay exit) 24 in . (inches 45 Depth, non-forebay deep pools (permanent pool to deep pool 24 in bottom] (inches) 46; If there is an orifiar, diameter inches 1 2 in 47 If there is a weir, weir height (inches) 48! tf there is d *Air. weir tenth pnches) 4916rawdown time for the temporary pool (days) 2.3 Wetland 1 8:51 AM 10/7/2021 STORMWATER WETLAND soil m d Pfanl s 51 Soil amendment deoth (inches) _ 51 Has a soil amendment specification been provided? 52 Has a landscaping plan that meets 5W Welland MD(; (12) been provided? 53 Number of plants per 200 square Feet M in the shallow water zone54 : Does the temporary inundation zone planting comply with SIN Welland MDC (14)? 55 Are the dam structure and temporary fill slopes planted in non - clumping turfgrass? 56 Will atlai;s tre planted in the wetland? 57 P!ease ise 11i,s space Ia ❑rpvid5 any add,tional rnformati0n about sty , , " .�,- wetland(s) arrflce diameter Is 1.F (rour ded up in Line 46 above to 2"). Tf;t number of plants per 200 SF in the shaftow water zone shaft be 50 (note.: here due to input error in Line 53 above). Yes Yes Yes No Wetland 4 8:51 AM 10/7/2021