SW3220304_Supplement-EZ Form_20220323

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION-
1
Project Name
Aidi East Spencer In -bound Traffic Imp.
2
1 Project Area ac
273.3
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
0
5
Is this project High or Low Densi
Low
6
Does this project use an off -site SCM?
No
;COMPLIANCE WITH 02H
remain
9 Ilf BUA is proposed in the setback, does it meet NCAC 02H.1003 4 o-d ? N/A
10 Is streambank stabilization proposed on this project? No
NUMBER
712
AND TYPE OF SCMs:
Infiltration System
Bioretention Cell
I
_�.
13
Wet Pond
14
Stormwater Wetland
15
Permeable Pavement
16
Sand Filter
17
Rainwater Harvesting RWH
18
Green Roof
19
Level S reader -Filter Strip LS-FS
20
Disconnected Impervious Surface DIS
21
Treatment Swale
22
Dry Pond
23
StormFilter
24
Silva Cell
25
BavfIlter
26
Filterra
FORMS LOADED
Todd Fisher -
_ColeJenest & Stone ,-
200 S.TTryon Street, Suite 1400
Charlotte, NC 28202
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.
All
q�. d
02�� 63
0: o
9
'Fo�P 2'O D D ,e`®
®P9eRaaLe..ai00�
Signature of Designer
2.23.22
Date

DRAINAGE AREAS
1
Is this a high density ro'ect?
No
2
If so, number of drainage areas/SCMs
0
3
Does this project have low density areas?
Yes
4
If so, number of low density drainage areas
2
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
zv,\I�
4
�nVL nnr.n �� vf�nlnl IVIY
Type of SCM
,c11t11C JILc
1 9904950 sf
IL4 �
LL! L .
None
7418270
7418270
0
602430 sf
0
None
5
Total drainage area (sq ft
4486680
4486680
6
Onsite drainage area (sq ft
11904950 sf
0
1379500 sf
0
7
Offsite drainage areas ft
0
8
Total BUA in ro'ect s ft
777070 sf
9
New BUA on subdivided lots (subject to
ermittin s ft
0
10
_
New BUA not on subdivided lots (subject to
ermittin sf)
1 268720 sf
97520sf
171200 sf
11
Offsite BUA s ft
0
0
0
12
Breakdown of new BUA not on subdivided lots:
Parking (sq ft
192570 if
89770 sf
102800 sf
Sidewalk (sq ft
3060 sf
2880sf
180 sf
Roof (sq ft
41QO sf
41DOsf
0
Roadway s ft
68990 sf
770 sf -
68220 sf
Future (sq ft
0
0
0
Other, please specify in the comment box
below (sq ft
0
0
0
13
New infiltrating permeable pavement on
subdivided lots (sq ft
0
0.
0
New infiltrating permeable pavement not on
subdividedlots s ft
0
0Existing
k16
BUA that will remain (not subject to
ermittin s ft
1110780 sf
679550sf
431230sf
Existin BUA that is alread ermitted s ft
0
0
0
Existin BUA that will be removed s ft
0
0
0
Percent BUA
12%
201
2%
19
Design storm inches
NIA
IA
N/A
20 IDesiqn
volume of SCM cu ft
N[A
N/A
N/A
21 Calculation method for design volume N/A
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage areas
N/A
N/A

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 021-1.1003
1 _I
2
Is project below density thresholds set forth in the applicable stormwater rule?
Does project maximize dispersed flow and minimize channelization of flow?
Yes
Yes
3
Has the use of piping been minimized per .1003(2)(c)?
Yes
4
ISide slopes of the vegetated conveyances (H:V)
31
5
Maximum velocity in the vegetated conveyances during the 10-year stone?
3.24
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)
350 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?
N/A
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
SwaleDrainage
#
BUA pervious (;
Area!
ac (ac) ac
Q
(cfs)
1 Slope
; N
V;ii,,
(fps)
V,�, R i
(fps)
Flow depth
(ft)
1
2
3
4
5
6
1.53 1.00
( 0 86 0.69
165 1.39
3.50 3.00
i 1,12 0.26
0.53
0.74
8.00
2.00
4.24
2.77
0.70
0.64
0.96
1.00
0.58
0.17
0:81
5.00
1:50
4.36
1;98
0.26
0.79
9A0
1':00
4.48
1.95
0.50
U3
20.40
1.50
4:52
3.24
0.86,
0.48
3.80
0.65
4.85
0.88-
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e.
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25r
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