SW6210601_Supplement-EZ Form_20211123

SUPPLEMENT-EZ COVER PAGE
FORMSLOADED
'ROJECT INFORMATION
................. .............. _.__.....
1 Project Name
2 Project Area (ac)
3 Coastal Wetland Area (ac)
4 Surface Water Area (ac)
5 Is this project High or Low Density?
6 Does this project use an off -site SCM?
:OMPLIANCE WITH 02H .1003(4)
Graceland Subdivision
54.95
0
0.81
Low
No
7 Width of vegetated setbacks provided (feet) _ 30
8 Will the vegetated setback remain vegetated? Yes
9 y'if BUA is proposed in the setback, does it meet NCAC 02H. 1 003(4)(c-d)? N/A
10 Is streambank stabilization proposed on this project? No
JUMBER 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 Call
25 !Bayfilter
26 Filterra
FORMSLOADED
DESIGNER CERTIFICATION
27
Name and Title. _ _
C. Scott Brown, PE
28
L Organization: _ _
_ _ _ 4D Site Solutions, Inc.
29
_
Street address: _
_ __ 409 Chicago Drive - Suite 112
30
City State, Zip: _
__ Fayetteville, NC 28306
31
Phone number(s):
910-42676777
32
Email
[e-mail]
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.
NC
SEAL =
027452
C) ' .ccIVGINEAP -A-
,,SCoTT
'
�. A�
Signature o Designer
Date
[f - Z3-zl

DRAINAGE AREAS
Is this a high density project? No
If so, number of drainage areas/SCIVIs 0
;Does this project have low density areas? Yes
4 4 If so, number of low density drainage areas
Is all/part of this project subject to previous rule
5 iversions? No
I FORMS LOADED
AREA INFORMATION
4
Type of SCM
Conveyances
5
iTotal drainage area (sq ft)
2,393,633
6
�Cinsite drainage area (sq ft)
2,393,633
7
�Ciffsitedrainage area (sq ft)
0
BUA in pTqject,(sq ft)
5785.57 sf
"!Total
New BUA on subdivided lots (subject to
9
_permitting) q
371223 sf
New BUA not on subdivided lots (subject to
10
permitting) (sf)
203229sf
11
,
�CiffsiteBUA
12 Breakdown of new BUA not on subdivided lots:
_7 Parking (sq 1)
- Sidewalk (sq ft)
Roof 1— ffN
Roadway,(sqft)_
Future (sq_ ft)
—F Other, please specify in the comment box
below (sq ft)
New infiltrating permeable pavement on
13 ,subdivided lot (sq ft)
'New infiltrating permeable pavement not on
_14. -,subdivided jots (sq ft)
Existing BOA that will remain (not subject to
15 'permitting) (sq ,ft) .
i 16 iExistinq BUA that is already permitted (sq ft),
17 Existing BUA that will be removed (sq ft)
18 Percent BOA
i 19, lDesign 'storm (inches)
20 Design volume of SCM - (cu ft)
-f- ;Calculation method for design volume
27709sf
1
2319-3.633
2,393,633
578557sf
371223sf
203229sf
sf
27709sf
175520 sf
sf f sf
sf
sf
sf
sf
sf
sf
4105 sf
4105 sf
246/6-
24%
. . .. ......
'!Please use this space to provide any additional information about the
22 drainage area(s):

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 minlmized per .1003(2)(c)?
Yes
4
Side slopes of the vegetated conveyances (H:V)
3 of
5
',Maximum velocity in the vegetated conveyances during the 10-year storm?
4.5
6
Are curb outlet swales proposed?
Yes
7
Maximum longitudinal slope of curb outlet swale(s) (%) _
5%
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)
100 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 Please use this space to provide any additional information about this low density project:
Swale
Drainage
BUA
Pervious
q
Slope
VamW
VK.M
Flow depth
#
Area
(art
area
(cfs)
P/.)
(fPS)
(fPS)
(g)
1
1.06
0.08
0.98
0.35
1.43
0.75
4.50
1 29
0.35
2
3.32
0.26
3.06
0.35
4.47
0.70
4.50
1.48
0.73
3
2.84
0.22
2.62
0.35
3.83
0 50
4.50
1,50
0.83
4
1.97
0.61
1.36
0.50
3.79
0 75
2.00
1.51
0.84
6 _
0.72
0.17
0.55
0.45
2.55
1.00
2.00
1.71
0.45
6
4.30
0.99
3.31
0.45
7.45
0.50
2.00
1.77
0.90
7
1.39
043
0.96
0.50
3.71
0.50
2.00
1.46
0.64
8.
5.09
0.78
4 31
0.40
7.84
0.60
4.50
1.91
0.88
9
2.65
0.61
2.04
0.45
4.60
1.80
4.50
2.48
0.52
10
1.49
0.34
1.15
0.45
3.57
1.90
4.50
1.89
0:53
11
1.95
0.30
1.65
0.40
3.01
0.30
4.50
115
0.66
12
1.65
0.38
1.27
0.45
2.85
0.30
4,50
1.14
0.65
13
1927
4.45
14.82
0.45
33.38
1.00
4.50
3.77
1.42
14
19.49
4.50
14.99
0.45
33.77
1.20
4.510
3.98
1.38
15
5.32
113
4.09
0.45
9.21
0.80
4.50
2.03
0.94
16
25.91
5.98
19.93
0.45
44.89
0.70
2.00
t 85
2.53 _
17
1.77
0.41
1.36
0.45
3.06
0.60
4.50
1.53
0.74
18
0.53
0.24
0.29
0.60
2.50
0.50
4.50
1.32
0.53
19
1.69
039
1.30
0.45
2.92
O 50
450
1.37
0.57
20
3,35
0.77
2:57
0:45
5.60
1.50
4.50
1.36
0.47
21
3.96
0.91
3.04
0.45
6.85
0.60
4.50
1.28
0.54
22
4.68
1.08
3.60
0.45
8.10
4 00
4.50
2.14
0.44
23
1:57
036
1.21
0:45
2.72
0.50
4:50
1:35
0:55
as
28
26
27
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