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Home My WebLink AboutSW4240502_Supplement-EZ Form_20240820 SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name Rosewood 2 Project Area(ac) ..................__...._. ___ .___.___.___� 43.03 3 Coastal Wetland Area(ac) 0 4 Surface Water Area(ac) 0 5 Is this project High or Low Density? Low ........ _. ._._ -. _ 6T oes this project use an off-site SCM? No COMPLIANGE WITH 02H.1003(4) 7 Width of vegetated setbacks provided(feet) 30 8 Will the vegetated setback remain vegetated? ! NIA —_ _. 9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? N1A 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell 13 Wet Pond 14 Siormwater Wetland 15 Permeable Pavement 16 Sand Filter 17 Rainwater Harvesting(RWH�_ 18 :Green Roof 19 _Level Spreader Filter Strip(L5 FS) 20 Disconnected Impervious Surface(DIS) _ 21 Treatment Swale 22 Dry Pond 23 Storn- ilter —� 24 Silva Cell 25 Bayfilter i 26 Filters �� — -- --- FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Steve Causey,President 28 Or anization: Allied Design,Inc. 29 Street address: 4720 Kester Mill Road _... ......_........_....... 30 City,State,Zip: Winston-Salem,NC 27103 31 Phone number(s) 336q 765-2377 32 Email: — scausey@allied-engsurv.com Certification Statement: I certify,under penalty of law thatthis SupplemeM-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 thatthe engineering plans, specifications,operation and maintenance agreements and other supporting information are consistent vWth the information provided here. Designer I/ C A fa 4 Q SEAL Signature of Designer 19701 fi "Q' ::A Date DRAINAGE AREAS 1 Is this a high density project? No 2 If so, number of drainage areas/SCMs 0 3 Does this project have low density areas? Yes 4 If so, number of low density drainage areas 1 Is all/part of this project subject to previous rule 5 versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site LD 1 4 Type of SCM 43.03 43.03 5 Total drainage area (sq ft 43.03 43.03 6 Onsite drainage area (sq ft 43.03 43.03 7 Offsite drainage area (sq ft 0 0 8 Total BUA in project(sq ft 449495 sf 449495 sf New BUA on subdivided lots (subject to permitting 9 (sq ft 395600 sf 395600 sf New BUA not on subdivided lots (subject to 10permitting) s 53895 sf 53895 sf 11 Offsite BUA(sq ft sf sf 12 Breakdown of new BUA not on subdivided lots: - Parking (sq ft sf sf - Sidewalk(sq ft sf sf - Roof(sq ft sf sf - Roadway s ft 53895 sf 53895 sf - Future (sq ft sf sf - Other, please specify in the comment box below (sq ft New infiltrating permeable pavement on 13 subdivided lots (sq ft sf sf New infiltrating permeable pavement not on 14 subdivided lots (sq ft) sf sf Existing BUA that will remain (not subject to 15permitting) s ft sf sf 16 1 Existing BUA that is already permitted (sq ft sf sf 17 Existing BUA that will be removed (sq ft sf sf 18 Percent BUA 24% 24% 19 Design storm inches 25- ear 25- r 20 Design volume of SCM cu ft NA NA 21 Calculation method for design volume NA NA ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): LOW DENSITY DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 021-1.1003 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 sf 5 1 Maximum velocity in the vegetated conveyances during the 10-year storm? 6 JAre curb outlet swales proposed? No 7 Maximum longitudinal slope of curb outlet swale(s)(%) 8 Bottom width of curb outlet swale(s)(feet) 9 Maximum side slope of curb outlet swale(s)(H:V) 10 Minimum length of curb outlet swale(s)(feet) 11 Are treatment swales used instead of curb outlet swales? 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 Are variations to rule.1003 proposed? No ADDITIONAL INFORMATION 15 1131ease use this space to provide any additional information about this low density project: Construction of the project has been completed.As originally designed,the curb outlets discharged into existing,well- established,naturally occurring,vegetated conveyances.Outlet stabilization was provided in accordance with NCDEQ erosion control design manual and the design was based on the 25-year storm event.The swale summary provided below is for the roadway side V- ditches. Swale BUA Drainage Pervious Q Slope V,,,o,,, , Flow depth # Area (ac) area C (cfs) (/) (fps) (fps) (ft) ac ac 1 0.98 029 0.69 0.35 1.89 5.00 3.00 2.36 028 2 0.39 0.12 027 0.35 0.75 5.00 3.00 1.52 0.19 3 0.85 026 0.60 0.35 1.64 5.00 3.00 2.10 028 4 021 0.06 0.15 0.35 0.40 5.00 3.00 1.16 0.14 5 0.66 020 0.46 0.35 127 1.50 3.00 0.99 0.40 6 0.05 0.02 0.04 0.35 0.10 1.50 3.00 0.10 0.12 7 0.04 0.01 0.03 0.35 0.08 2.00 3.00 0.36 0.10 8 0.71 021 0.50 0.35 1.37 2.00 3.00 1.19 0.37 9 027 0.08 0.19 0.35 0.52 2.00 3.00 0.81 024 10 0.51 0.15 0.36 0.35 0.98 4.35 3.00 1.58 023 11 029 0.09 020 0.35 0.56 4.35 3.00 125 0.18 12 0.65 020 0.46 0.35 125 4.35 3.00 1.74 026 13 0.50 0.15 0.35 0.35 0.96 4.35 3.00 1.56 023 14 0.66 020 0.46 0.35 127 4.35 3.00 1.76 026 15 1 0.50 0.15 0.35 0.35 0.96 4.35 3.00 1.56 023 16 0.66 020 0.46 0.35 127 5.00 3.00 2.39 020 17 0.19 0.06 0.13 0.35 0.37 5.00 3.00 1.40 0.11 18 020 0.06 0.14 0.35 0.39 5.00 3.00 1.42 0.12 19 0.13 0.04 0.09 0.35 025 5.00 3.00 1.13 0.09 20 21 22 23 24 25 26 27 28 29 30