SW6230901_Supplement-EZ Form_20231129

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
ROJECT INFORMATION „,1
1 Project Name Royal Farms Ph II Subdivision
2 Project Area(ac) 35.82 ..
3 •Coastal Wetland Area(ac)
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
OMPLIANCE WITH 02H.1003(4) a �� ,o .u,
7 Width of vegetated setbacks provided(feet) 30'
i
8 Will the vegetated setback remain vegetated? Yes
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
.
!UMBER AND TYPE OF SCMs: 1
11 ,Infiltration System I
12 .Bioretention Cell
13 Wet Pond
14 Stormwater Wetland
15 Permeable Pavement
_ _ I
16 -,Sand Filter
17 'Rainwater Harvesting(RWH)
18 •Green Roof f
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
I FORMS LOADED I
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DESIGNER CERTIFICATION '
.,4/s mm ..R.,. » .,. .M.T..,,,,1M,4,.,,,.,9 ,y, .4 4,ems„1.4,�1_ . .c. .,,�„ .,....-.A.M„ .. E1.01,.... -...E...,,... x. ,-. ..�.,..,..P ,,. �,1 1...:�.V.., fi....
27 Name and Title: Scott Brown,PE-Vice President 4
28 'Organization. 4D Site Solutions, Inc___
29 ;Street address: 409 Chicago Drive,Suite 112
30 ;City,State,Zip: Fayetteville,NC 28308
31 :Phone number(s): 910 426 6777 F
32 'Email: sbrown(i 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.
Designer
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s CARP
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SEAL •
= Signature of Designer
027452 =
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Seal Date

DRAINAGE AREAS
1 -t Is this a high density project? : No
2 I If so, number of drainage areas/SCMs 0
3 IDoes this project have low density areas? Yes
4 t If so, number of low density drainage areas , 1
Is all/part of this project subject to previous rule
5 versions? I No ,
FORMS LOADED
RAINAGE AREA INFORMATION 1 Entire Site J. LD 1
4 'Type of SCM
4 v
5 ./'Total drainage area(sq ft) i 1560,195 4 1,560,195
6 i Onsite drainage area(sq ft) 1,560,195 ; 1,560,195
7 Offsite drainage area(sq ft) ,
8 jTotal BUA in project(sq ft) , 374434 sf t; 374434 sf
• ; T
New BUA on subdivided lots(subject to tI 1
9 tpermitting)(sq ft) t
i.. 326268 sf 1 326268 sf
4 i
New BUA not on subdivided lots(subject to
10 I permitting)_(sf) $ 48166 sf
48166 sf
11 ,Offsite BUA(sq ft) T
;,; -I
st t
t .1
12 Breakdown of new BUA not on subdivided lots:
, -Parking(sq ft) i- itt i
. f
-Sidewalk(sq.ft) !' i-Roof(sq if) I II_
-Roadwayisq ft) 48166 sf 1 48166 sf
. . s.
-Future(sgft) I 4
-Other, please specify in the comment box ;
4 i 4
below Isq ft)
1 ; i
New infiltrating permeable pavement on
13 ;subdivided lots(sq ftl it.
New infiltrating permeable pavement not on t 1, It
14...4sybdivicled lots(sq ft) i
4
Existing BUA that will remain(not subject to t — 1
t ;
16 tperrnifting)(sq ft), ; t
t T .. s
16 Existing BUA that is already permitted(sq ft) j.
17 i Existing BUA that will be removed(sq ft) 1 !$ ;
18 Percent BUA t T ;
.19_ .jDesign storm(inches) ,
— .
20 Design volume of SCM(Cu ft) ;
t4
21 Calculation_method for design volume
UM154.11I0M416015111.5f...50XWM0102BIBVPMPV5.....55555,5,115.1* 05.01,........5576.1545)1.,,,,,a15,45.1,0,VM..,..alKrn it.,145.5.4,7•52515M.T.,511.5 gi',5.V 57 5
ADDITIONAL INFORMATION ,.
'Please use this space to provide any additional information about the ;
22 !drainage area(s):
;
7
9

1 1 Is project below density thresholds settortninmeappncaomeawi rvam
j Yes
g 2 Does project maximize dispersed flow and minimize channelization of flow?
0 3 Has the use of piping been minimized per.1003(2)(c)?
Yes i+
_ 3 sf 1
(I4 ,Side slopes of the vegetated conveyances(H.V}
) 5 Maximum velocity in the vegetated conveyances during the 10-year storm?
2.76
No
0 6 Are curb outlet swales proposed?
"
0
7 Maximum longitudinal slope of curb outlet swale(s)(%)
s 8 Bottom width of curb outlet swale(s)(feet)
r 9 Maximum side slope of curb outlet swale(s)(H:V)
00,
10 Minimum length of curb outlet swale(s)(feet)
0, 11 Are treatment swales used instead of curb outlet swales?
0 _- Yes a
i 12 Is stormwater released at the edge of the setback as dispersed flow? Yes e
€ 13 Have stormwater outlets been designed to prevent downslope erosion? t
.,
14 Are variations to rule.1003 proposed? No ,,�s..� .� .�.-.,� -
;ADDITIONAL INFORMATION _w, -^. ;,.,.{
1 15 r Please use this space to provide any additional information about this low density project k
Y
00
N
i
1. The Swale information is shown on the attached sheet. _ _ _.,, __ „,v,�:,„
.mw�Amn+:.�w.n..uk ...
Drainage BUA Pervious ! Q Slope • V,s.. • V,n,,., Flow depth
Sw0ale Area • (ac) area C (cfs) (%) (fps) (fps) ' (ft)
iacl (act
1
2._..
3
4
6
6
7._
8
9
10 •
11
12
13
14
16
16
17
18
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 2.98 0.69 2.29 0.45 8.52 0.50% 5.00 1.84 1.16
2 1.51 0.35 1.16 0.45 4.31 0.50% 5.00 2.76 0.88
3 0.17 0.05 0.12 0.50 0.67 0.50% 5.00 0.98 0.41
4 0.62 0.19 0.43 0.50 1.66 0.50% 5.00 1.23 0.60
5 0.76 0.23 0.53 0.50 2.04 0.50% 5.00 1.29 0.65
6 0.20 0.06 0.14 0.50 0.79 0.50% 5.00 1.02 0.44
7 0.42 0.10 0.32 0.45 1.50 0.50% 5.00 1.19 0.57
8 11.69 1.80 9.89 0.40 18.14 0.10% 5.00 1.22 2.14
9 2.73 0.42 2.31 0.40 5.85 0.10% 5.00 0.92 1.38
10 14.64 2.25 12.39 0.40 22.72 0.10% 5.00 1.29 2.34