SW6240607_Supplement-EZ Form_20240830

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Roiling Springs Section 9
2 L Project Area(ac) 37 28
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
ICOMPUANCE WITH 02H.1003(4)..M .d
t 7 sWidth of vegetated setbacks provided(feet) n/a _
F 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
110 Is streambank stabilization proposed on this project?
[NUMBER AND TYPE OF SCMs:
11 Infiltration System
12 Bioretention Cell
13 ,Wet Pond
1 14 Stormwater Wetland
) 15 Permeable Pavement I!
16 Sand Filter
17 'Rainwater Harvesting(RWH)
118 Green Roof
19 Level Spreader-Filter Strip(LS-FS) I
1 20 Disconnected Impervious Surface(DIS)
i 21 Treatment Swale
s22 Dry Pond
i23 StormFilter I
24 Silva Cell
1 25 Bayfilter
i 26 Fiiterra
FORMS LOADED
EJ NER CERTIFICATION
27 'Name and Title: C. Scott Brown,PE i
l
28 Organization: 4D Site Solutions, Inc.
29 Street address: 409 Chicago Drive-Ste 112 j
30 City,State,Zip: Fayetteville, NC 28306 s
I 31 Phone number(s): 910-426-6777
s 32 :Email: sbrown©4dsitesolutions.com
Certification Statement:
I 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 with the information provided here.
Designer
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SEAL - Signature of Designer
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Seal Date

DRAINAGE AREAS
1 ,Is this a high density project? No
2 If so,number of drainage areaslSCMs 0
3 IDoes this project have low density areas? Yes
4 1 If so, number of low density drainage areas 1
1 Is all/part of this project subject to previous rule
ti 5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site LD 1 1
4 iType of SCM Low Density f Low Density
rc
5 .Total drainage area(sq ft) 1 623,8971 1,623,897
6 jOffste drainage area(sq ft)Onsite drainage area(sq ft) 1 6230,897 1 6230,897
8 1Total BUA in project(sq ft) t
tt 389709 sf I 389709 sf
New BUA on subdivided lots(subject to
9 permitting)(sq ft) A 328032 sf 328032 sf It t
New BUA not on subdivided lots(subject to t
10 1permittmg)(sf) " 61117 sf 61117 sf
11 ;Offsite BUA(sq ft) m
12 Breakdown of new BUA not on subdivided lots: t A
a .-Parking(sq ft)_.._ tt t
-Sidewalk(sq ft) tt
..
ft)
j
Roadway(sq ft). . _..61117 sf 61117 sf t
t
(sq ft) ,t. 1 7
Other, please specify in the comment box
below(sq ft) #_. _.. __
New infiltrating permeable pavement on 4
X f
13 'subdivided lots�sqft). s f... t
New infiltrating permeable pavement not on A t ^
14 jsubdivided lots(sq ft 5
'Existing BUA that will remain(not subject to A ;,
15 :permitting)(sq ft) k 560 sf f 560 sf
t
16 tExisting BUA that is already permitted(sq ft) j
17 i ExistingBUA that will be removed s ft)
'` t
( q
n 18 ~Percent BUA 24% t_._. 24% r;
(19 ;Design storm(inches)
[20 'Design volume of SCM(cu ft)
21 !Calculation method for design volume t
'ADDITIONAL INFORMATION y
, Please use this space to provide any additional information about the
22 drainage area(s): z
t f
t

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H.1003
Is project below densitythresholds set forth in the applicable stormwater� � A
1 Prol ��•� PP 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 i Side slopes of the vegetated conveyances(H:V) 3
5 Maximum velocity in the vegetated conveyances during the 10-year storm? 4.5
1 6 Are curb outlet swales proposed? No
E
7 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)
v 10 Minimum length of curb outlet swale(s)(feet)
s 11 Are treatment swales used instead of curb outlet swales?
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: i
I
t
Drainage ' Pervious
Swale BUA Q Slope VA., V,n,,,, Flow depth
Area '
# (act (ac) area(act C (cfs) (%) (fps) (fps) (ft)
1 0.36 0.14 0.22 0.55 1.54 5.00 4.00 2.94 0.32
2 0.69 0.11 0.58 0.40 2.15 5.00 4.00 3.31 0.37
3 0.43 0.13 0.30 0.50 1.67 1.30 4.50 1.38 0.56
4 0.84 0.19 0.65 0.45 2.94 4.40 4.50 3.43 0.46
5 1.47 0.34 1.13 0.45 5.15 2.50 4.50 3.00 0.68
8 2.26 0.52 1.74 0.45 7.92 6.80 6.27 6.27 0.57
7 2.65 0.61 2.04 0.45 9.29 8.80 7.24 7.24 0.40
8 3.25 0.75 2.50 0.45 11.39 0.50 4.50 1.53 1.28
9 4.24 ' 0.98 3.26 0.45 14.86 5.90 7.19 7.19 0.75
10 4.58 1.06 3.52 0.45 16.06 4.50 6.12 6.12 0.66
11 5.08 1.17 3.91 0.45 17.81 2.90 4.94 4.94 0.81
12 3.76 0.87 2.89 0.45 13.18 3.90 5.41 5.41 0.82
13 0.23 0-07 0.16 0.50 0-88 4.60 4-50 2-30 0.28
14 7.92 1.83 6.09 0.45 27.76 3.40 6.36 6.36 0.92
16 0.11 0,04 0.07 0.55 0.47 4,60 4.50 1.84 0.22
16 0.31 0.09 0.21 0.50 1.19 7.60 4.00 2.89 0.17
17 0.31 0.10 0.22 0.50 1.21 4.30 4.50 2.48 0.33
18 0.13 0.05 0.08 0.55 0.57 4,30 4,50 1,89 0.24
19 1.00 0.23 0.77 0 45 3.51 0.50 4.50 1.05 0,83
20 0.30 0.11 0.18 0.55 1.26 8.90 4.00 3.83 0.26
21 0.42 0.13 0.29 0.50 1.64 8.90 4.21 4.21 0.29
22 0.37 0.14 0.23 0.55 1.61 5.00 4.00 I 2.99 ' 0.35
23 0.66 0.20 0.46 0.50 2.57 5.00 4.00 3.52 0.42
24 1.28 0.39 0.89 0.50 4.99 2.30 4.00 2.83 0.69
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