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Home My WebLink AboutSW6220602_Supplement-EZ Form_20220915SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name - 2 Project Area (ac) 3 _ Coastal Wetiand Area (ac) 4 SSurfaace Water Area (ac) _5 Is this project High or Low Density? 6 Does this project use an off -site SCM? COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided (feet) 8 Will the vegetated setback remain vegetated? 9 If BUA is proposed in the setback, does it meet NCAC 02H 10 Is streambank stabilization proposed on this project? Tarrant Estates Subdivision Low No 30 Yes_ - N/A 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 -Finer Strip LS-FS 20 Disconnected Impervious Surface (DIS) 21 Treatment Swale 22 Dry Pond — 23 StormFilter 24 Silva Cell 25 Bayfifter 26 Filterra FORMS LOADED DESIGNER CERTIFICATION �— —27 Name and Title: 1 28 I Organization: 1 Street address: 30 Cit ry State, Zip: 31 Phone number(s): 32 i Email: C. Scott Brown, PE 4D Site Solutions, Inc _ 409 Chicago Drive, Suite 112 Fayetteville, NC 28306 910-426-6777 sbrown@4dsitesolutions.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. �H CAF? = SEAL = 027452 = Seal p� n Signature of Designer Date DRAINAGE AREAS 1 Is this a hi h 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 iversions? No FORMS LOADED DRAINAGE AREA INFORMATION tntire site Lu i 4 Type of SCM 5 Total drainage area (sq ft) 2823072 2823072 6 Onsite drainage area ft2823072 2823072 7 Offsite drainage area (sq ft) 8 Total BUA in project (sg ft) 446632 sf 446632 sf New BUA on subdivided lots (subject to 9 permitting)ft 357500 sf 357500 sf 10permitting) New BUA not on subdivided lots (subject to sf 89132 sf 89132 sf 11 Offsite BUA ft 12 Breakdown of new BUA not on subdivided lots: - Parkin ft - Sidewalk ft - Roof ft - Roadwa ft 89132 sf 89132 sf - Future ft - Other, please specify in the comment box below ft New infiltrating permeable pavement on 13 subdivided lots ft 14 New infiltrating permeable pavement not on subdivided lots ft) 15 Existing BUA that will remain (not subject to permitting)ft 16 Existing BUA that is already permitted ft 17 Existing BUA that will be removed ft 18 Percent BUA 19 Design storm (inches) 20 Design volume of SC cu ft 21 Calculation method for design volume 16% 1.0 in 16% 1.0 in ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 .drainage area(s)___ LOW DENSITY SIGN_RE UIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003 1 Is project bellow density thresholds set forth in the applicable stormwater rule? Yes 2 3 4 5 Does project maximize dispersed flow and minimize channelization of Flow? Has the use of piping been minimized per .1003(2)(c)? Side slopes of the vegetated conveyances (H:V) Maximum velocity in the vegetated conveyances during the 10-year storm? Yes Yes 3 sf 2.3 6 Are curb outlet swales proposed? Maximum longitudinal slope of curb outlet swale(s) I[%) Bottom width of curb outlet swale(s) (feet) No 7 6 9 Maximum side slope of curb outlet swale(s) (H:V) 10 Minimum length of curb outlet swale(s) (feet)_ 11 12 13 14 Are treatment swales used instead of curb outlet swales? Is stormwater released at the edge of the setback as dispersed flow? Have stormwater outlets been designed to prevent downslope erosion? Are variations to rule .1003 proposed? _ _ Yes Yes No )DITIONAL INFORMATION 15 Please use this space to provide any additional information about this low density project swats # DrainagePerviouspervious Q Slope V.11.. V.—I Flow depth Area (ac) area C () (°Jo) (fps) {fps} (it) s) -- 7 - - - 3 5 - --- 6 7 _ 9 10 11 12 — 13 - 14 E-1 15 sv - 16 - 17 1s 19--- — — ---- — -. — - _- 20 21 22 23 24 - 25 26 27 28 29 - 30 LOW DENSITY Pervious SLOPE Swale # DA ac BUA ac Area ac c Q cfs % Vallow Vactual F Depth (ft) 1 0.09 0.03 0.06 0.50 0.36 0.36% 5.00 0.71 0.36 2 0.10 0.03 0.07 0.50 0.40 0.50% 5.00 0.85 0.32 3 4.39 0.68 3.71 0.40 6.85 0.40% 5.00 1.61 1.11 4 0.12 0.04 0.08 0.50 0.48 0.50% 5.00 0.90 0.35 5 0.17 0.05 0.12 0.50 0.68 1.20 % 5.00 1.36 0.34 6 5.76 0.44 5.32 0.35 7.86 0.30% 5.00 1.50 1.25 7 5.83 0.45 5.38 0.35 7.96 0.30% 5.00 1.50 1.25 8 0.18 0.06 0.12 0.50 0.72 0.50% 5.00 0.98 0.41 9 0.70 0.22 0.48 0.50 1.89 0.50% 5.00 1.27 0.63 10 1.48 0.34 1.14 0.45 3.59 0.50% 5.00 1.49 0.82 11 0.66 0.15 0.51 0.45 1.60 0.50% 5.00 1.21 0.58 12 0.09 0.03 0.06 0.50 0.36 0.50% 5.00 0.85 0.32 13 2.19 0.34 1.85 0.40 3.42 0.40% 5.00 1.35 0.84 14 0.29 0.09 0.20 0.50 1.16 0.50% 5.00 1.13 0.52 15 5.86 0.90 4.96 0.40 9.14 0.50% 5.00 1.88 1.19 16 0.15 0.05 0.10 0.50 0.60 0.50% 5.00 0.95 0.38 17 0.42 0.13 0.29 0.50 1.68 0.80% 5.00 1.47 0.54 18 11.50 0.88 10.62 0.35 15.70 0.50% 5.00 1.24 1.98 19 1.76 0.27 1.49 0.40 2.75 0.50% 5.00 1.40 0.74 20 1.32 0.20 1.12 0.40 2.85 0.50% 5.00 1.41 0.75 21 1.75 0.00 1.75 0.30 2.83 2.00% 5.00 1.92 0.62 22 4.64 0.36 4.28 0.35 8.75 1.00% 5.00 2.30 1.05 23 0.94 0.14 0.80 0.40 2.03 0.50% 5.00 1.28 0.64 24 0.91 0.14 0.77 0.40 1.96 0.50% 5.00 1.28 0.64 25 2.12 0.16 1.96 0.35 4.00 0.80% 5.00 1.60 0.83 26 1.02 0.16 0.86 0.40 2.20 0.50% 5.00 1.31 0.67 27 1.36 0.00 1.36 0.30 2.20 3.00% 5.00 2.04 0.52 28 1.65 0.25 1.40 0.40 3.56 0.50% 5.00 1.49 0.82 29 0.50 0.00 0.50 0.30 0.81 2.00% 5.00 1.35 0.37 30 0.99 0.08 0.91 0.35 1.84 0.50% 5.00 1.27 0.63 31 1.30 0.10 1.20 0.35 2.45 0.50% 5.00 1.35 0.70 32 0.82 0.00 0.82 0.30 1.33 2.00% 5.00 1.53 0.46 33 1.62 0.12 1.50 0.35 3.06 1.00% 5.00 1.58 0.73 34 2.22 0.17 2.05 0.35 4.19 0.50% 5.00 1.55 0.87 35 0.25 0.00 0.25 0.30 0.40 3.00% 5.00 1.31 0.25 36 1.30 0.10 1.20 0.35 2.45 0.50% 5.00 1.36 0.70 37 0.09 0.02 0.07 0.45 0.32 0.50% 5.00 0.79 0.28