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Home My WebLink AboutSW4210801_Supplement-EZ Form_20220818SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION •�. w_......-�_�-�M-��T��M•�-M-�•� -�-?m 1 Project Name Holt Farm 3 coastal wetland Area (ac)-----_- - -- 0 4 Surface Water Area ac 0 5 Is this project High or Low Density? _ _-_ - Low 6 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided (feet) _---. - — - 0 -A 1 Will the vegetated setback remain vegetated? NIA 9 If_B_UA is proposed in the setback, does it meet NCAC 021-1.10034�(c-d ? -- NIA 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell ---------------..— _--_.---.--------- -------------__._-._.__ - __ -_ 0 0 13 Wet Pond --__- ..__._.-- 0 14 15 Stormwater Wetland Permeable Pavement 0 0 16 Sand Filter 0 17-t!Rainwater 18 Harvesting(RWH) (Green Roof d__ 0 19- Levei Spreader -Filter Strip(LS—FSZ--, 0 20 Disconnected Impervious Surface (DIS) _ _-- _- 0 0 ----- --- 0 - _ ---- 0 0 0 0 21 ' Treatment Swale 22 Dry Pond -- ---- - - --- --._ -_ _ T ---- 23 StormFilter 24 Silva Cell 25 BIter_----__---- ----_____-- 26 Filterra FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: 28 j Organization: _ 29-i Street address: 30 � City, State, ZP_-------------.__. 31 Phone numbers 32 Email: Chad E. Abbott, PE C3 Pas jgn-and Engineering, 2537 East_Lyon Station Road,,,' Creedmoor, NC 27522 919 230__0996 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. N R �i sssj,- 036242 - �� lip, G I N 0, A, \.. Et tAVeo �\\. I/t(Q/AZ- DRAINAGE AREAS 1 Is this a hi h densitypro'e1 ct? _� 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 densitydrainage 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 NA _ _ 5 Total drainage area (sq ft974067 Onsite drainage areas ft974067�� _ 7 Offsite drainage area (sq ft) _ _ 0 Total BUA inproject (ssft ____ 158302 sf New BUA on subdivided lots (subject to permitting) (sq ft)... -- _ _ . 123302 sf New BUA not on subdivided lots (subject to (sf)— 35000 sf Offsite BUA (sq ft) sf Breakdown of new BUA not on subdivided lots: - Parking (sq ft) - Sidewalk (sq ft) r6 8 _ 9 10_permitting) 11 12 - Roadway (sq ft) _ 35000 sf - Future (sq ft) - Other, please specify in the comment box below New infiltrating permeable pavement on subdivided lots (sq ft) _ 13 sf 14 New infiltrating permeable pavement not on subdivided lots (sq ft) sf 15 Existing BUA that will remain (not subject to peEmittin (sqft)_ Existing BUA that is already permitted (s ft Existing BUA that will be removed s(�c T__ sf 16 17 13816 sf 13816 sf_ 18 Percent BUA 16% 19 Design storm (inches 20 Design volume of SCM (cu ft) NA NA 21 Calculation method for design volume NA ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 drainage area(s): Property has two drainage area (DA), but summarized in one DA since the majority of the proposed impervious area are located in one specific DA. LOW DENSITY DESIGN -REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003 1 Is project below density thresholds set forth in the applicable stormwater rule? 2 Does project maximize dispersed flow and minimize channelization of flow? 3 Has the use of piping been minimized per .1003(2)(c)? 4 Side slopes of the vegetated conveyances (H:V) _ . -- - -- ------ _.. 5 Maximum velocity in the vegetated conveyances during the 10-year storm? 6 Are curb outlet swales proposed? ----- -- - -- ------- 7 Maximum longitudinal slope of curb outlet swale(s) (°h) 8 Bottom width of curb outlet swale(s) (feet) 9 Ma)dmum 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 $wales? 12 Is stormwater released at the edge of the setback as dispersed flow? _ 13 Have stormwater outlets been designed to prevent downslope erosion? - -~ 14 Are variations to rule .1003 proposed? ADDITIONAL INFORMATION 15 Please use this space to provide any additional information about this low density project: Swale#1 is DWD-1/PD-1 Swale#2 is DWD-2/PD-2 Swale#3 is DWD-3/PD-3 Swale#4 is DWD-4/PD-4 Swale#5 is CWD-1 Swale#e is CWD-2 Please refer to sheet C-1.1 for diversion/ditch schedule Swale Drainage Pervious BUA p C I Aaca 81ops VNr,, V.� a Flow depth # lac) aarea (cis) ! (Nr) (fps) (fps) (ft) 1 5.92 0.32 5.60 0.24 1018 I 1.85 5.00 3,55 0.98 2 6.16 0.07 6.09 0.21 918 1 88 5.00 3.24 0.97 3 2.91 0.25 2.66 0.26 5.50 1.98 5.00 2.33 0.89 4 5 -- 1.64 7.74 --- -- 0.07 0.00 - 1.57 0.23 7.74 0.20 - ----1 2.72 11.07 _ ---- 1.85 1.17 _ 5.00 5.00 --- 1.49 -------- 3.38 --- 0.78 -- --- 1.05 8 5.97 0.00 5.97 0.20 8.54 I 1.77 5.00 3.10 0.98 s 10 11 12 -_ 13 14 15 18 1- j 1s 19 20 .____.--------_-.__._..__- ------.._._.__._-----..._.._._.__--------- ----------. _._._--------i------------- ---..._._.----.._. 27._... 22 ----- -------- - - 23 -- -- - 24 25 26 27 - - - - - -- --- -------------- --------- ----- -------------- - ------- -- •------- --- ......_..._ 28 29