SW6210402_Supplement-EZ Form_20220119

SUPP'-EMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Woodhaven Subdivision
2 Project Area (ac) 27.39
3 Coastal Wetland Area (ac)
4 Surface Water Area (ac) 0.25
5 Is this project High or Low Density? Low
6 Does this project use an off -site SCM? No
OMPLIANCE WITH 02H .1003(4)
7 Width of vegetated setbacks provided (feet) 30
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)?
10 Is streambank stabilization proposed on this project? No
25 'Bayfilter
26 Filterra
FORMS LOADED
27 Name and Title:
Scott Brown, PE - Vice President
28 Organization:
; 4D Site Solutions, Inc
29 lStreet address:
409 Chicago Drive, Suite 112
30 City, State Zip:
Fayetteville, NC 28306
31 Phone number(s):
910426-6777
32 iEmail:
sbrownO.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,
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Signature of Designer
Date
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LOW DENSITY
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)
3 sf
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
4.46
6
Are curb outlet swales proposed?
Yes
7
Maximum longitudinal slope of curb outlet swale(s) (%)
2%
8
Bottom width of curb outlet swale(s) (feet)
2 ft
9
Maximum side slope of curb outlet swale(s) (H:V)
3:1
10
Minimum length of curb outlet swale(s) (feet)
122 ft
11
Are treatment swales used instead of curb outlet swales?
No
12
! Is stormwater released at the edge of the setback as dispersed flow?
Yes
13
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14
.Are variations to rule .1003 proposed?
No
15 j Please use this space to provide any additional information about this low density project:
swale
Drainage j
BUA
Pervious
Q
Slope
V.s,,,,,
1 V..,
Flow depth
#
Area
(ac )i
area
C
(cis)
N
(fps)
00s)
(ft)
1
9.38
1.01
8.37
0.37
27.30
0.10
5.00
1.35
2.29
2
1,94
0.50
1.34
0.50
_
7.06
0.50
_._
5.00
1.74
0.88
3
1.06
0.57
0.49
0.65
5.02
0.70
5.00
1.80
0.69
4
2.25
0.55
1.70
0.46
8.20
0.50
5.00
1.81
0.94
5
1.42
031
1.11
0.44
4.90
0.30
5.00
1.34
0.82
6
1144
1.20
10.24
0.37
30.80
2.30
5.00
4.56
1.20
7
0.93
0.39
0.54
0.51
3.70
0.70
5.00
1.42
0.66
8
10
11
12
13
14
_
16
17
18
19
20
21
r
22
2324
-
25
_.__,
26
27
28
29
_30,_