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HomeMy WebLinkAboutSW1190901_Supplement-EZ Form_20200306SUPPLEMENT-EZ COVER PAGE FORtv1S LOADED -PROJECT INFORMATION 1 Project Name _ Asheville Regional Airport Parking Lois 2 Pro act Area (ac) v� 13.41 3 Coastal Wetland Area ac 0 4 Surface Water Area (ac) 0 5 Jis this ro'ect Hi h or Low_Densi 7 Low 6 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 JWldth of Vegetated setbacks provided feet 30 8 .Will the vegetated setback remaln vegetated?--�_ Yes 9 Is BUA other that as listed in .1003 4 c out of the setback? 1 No 10 Ils streambank stabilization proposed an this project? I —~ No NUMBER AND TYPE OF SClhls; 11 Infikration S stem - p 12 Bloreterrtlon Cell. p y 13 14 Wet Pond Stormwater Wetland 0 15 Permeable Pavement 0 16 Sand Filter - 0 17 Rainwater Harvesting RWH 0 18 Green Roof 0 19 Level Spreader -Filter Ship LS-FS 0 20 21 1 Disconniwled Impervious Surface (DISC iTreatment Swale - p 0 22 -� Dry Pond 0_. 23 StormFilter 0 24 Silva Cell 0 25 Bayfilter 0 26 Filterra 0 FORMSLOADED Certification Statement, 1 certify, under penally 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 wth the information provided here. �N C A R 0 4019 = L Signature o Designer Date DRAINAGE AREAS 1 Is this a hi h density project? No 2 If so, number of drainage areas/SCMs 1 3 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 4 Type of SCM 5 Total BUA in project (sq ft 100647 sf 6 New BUA on subdivided lots (subject to ermitting) (so ft 7 New BUA outside of subdivided lots (subject to permittin sf) 97915 sf 8 lOffsite - total area (sq ft 9 Offsite BUA (sq ft 10 Breakdown of new BUA outside subdivided lots: Parking (sq ft 97915 sf Sidewalk (sq ft Roof (sq ft Roadway s ft Future (sq ft Other, please specify in the comment box below (sq ft 11 New infiltrating permeable pavement on subdivided lots (sq ft 12 New infiltrating permeable pavement outside of subdivided lots (sq ft 13permitting) Exisitng BUA that will remain (not subject to s ft 2732 sf 14 Existing BUA that is already permitted (sq ft 15 Existina BUA that will be removed (sq ft 16 Percent BUA 17% 17 Desi n storm inches 18 Desi n volume of SCM cu ft 19 lCalculation method for design volume ADDITIONAL INFORMATION 20 Please use this space to provide any additional information about the drainage area(s): LOW DENSITY DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003 1 Is project below density thresholds set forth in the applicable stormwater rule? Yes 2 Does project maximize dispersed flow and minimize channelization of flow? Yes 3 Has the use of piping been minimized per .1003(2)(c)? Yes 4 Side slopes of the vegetated conveyances (H:V) 3:1 5 Maximum velocity in the vegetated conveyances during the 10-year storm? 4.41 6 Are curb outlet swales proposed? Yes 7 Maximum longitudinal slope of curb outlet swale(s) (%) 4% 8 Bottom width of curb outlet swale(s) (feet) 3 ft 9 Maximum side slope of curb outlet swale(s) (H:V) 3:1 10 Minimum length of curb outlet swale(s) (feet) 125 ft 11 Are treatment swales used instead of curb outlet swales? No 12 Is stormwater released at the edge of the setback as dispersed flow? Yes 13 Have stormwater outlets been designed to prevent downslope erosion? Yes 14 ADDITIONAL 15 Are variations to rule .1003 proposed? INFORMATION 1 Please use this space to provide any additional information about this low density project: No Drainage BUA Pervious Q Slope Va„°w Vactual Flow Swale # A Area re (ac) area C (cfs) (%) (fps) (fps) depth (ft) (ac1 ac 1.67 1.61 0.06 96.7 10.43 1.40 4.50 4.41 0.60