SW5240401_Supplement-EZ Form_20240404

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name RSC Development
2 Project Area(ac) __3.33
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) N.A
8 Will the vegetated setback remain vegetated? N/A
9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? N/A
10 Is streambank stabilization proposed on this project? No
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-Filter Strip(LS-FS)
20 Disconnected Impervious Surface(DIS)
21 Treatment Swale
22 Dry Pond
23 StormFilter
24 Silva Cell
25 Bayfilter
26 Filterra
FORMS LOADED •
DESIGNER CERTIFICATION I
,ter. — ..,�,. _.._ -�,•-- _�.. _
27 Name and Title: William H.Mitchell, PE
28 Organization: Mitchell Design Group,PLLC
29 Street address: _ PO Box 2007
30 City,State,Zip: Wake Forest,NC 27588
31 Phone number(s): [phone]
32 Email: harry©mitchelldesgroup.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.
Designer AWL 1
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DRAINAGE AREAS
1 Is this a high density project? No
2 If so,number of drainage areas/SCMs
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
CLICK TO LOAD FORM

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) 6 sf
5 Maximum velocity in the vegetated conveyances during the 10-year storm? 2.34
6 Are curb outlet smiles 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 swaees?
12 Is stormwater released at the edge of the setback as dispersed flow? N/A
13 Have stormwater outlets been designed to prevent downslope erosion? Yes
14 Are variations to rule.1003 proposed? No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:
Drainage Pervious
Swale EWA Q Sbpe V,„., Flow depth
0 l Arel (ac) � )rea
t: (�) (%) (fps) (fps) (ft)
1 0.48 0.34 0.12 0.83 2.79 1.25 4.00 1.20 0.37
2 0.65 0.17 0.48 0.62 2.90 2.22 4.00 1.66 0.30
9 0.72 0.51 0.21 0.81 4.24 3.15 4.00 2.34 0.31
4 0.25 0.06 0.19 0.60 1.09 2.25 4.00 1.11 0.19
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