SW6220806_Supplement-EZ Form_20221128

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name
2 Project Area ac
3 Coastal Wetland Area ac
McMillan Manor Subdivision
62.9
0
0.67
4
Surface Water Area ac
5
Is this project High or Low Density?
Low
6
1 Does this protect use an off -site SCM?
No
COMPLIANCE WITH 02H .1003(4)
7
Width of ve etated 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 ?
I n/a
10
1 Is streambank stabilization proposed on this project?
I No
NUMBER 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 Cell
25
Ba filter
IFilterra
26
FORMS LOADED
NER CERTIFICATION
Name and Title:
Organization:
Street address:
City, State, Zip:
Phone number(s):
Email:
C. Scott Brown, PE - Vice President
4D Site Solutions, Inc.
409 Chicago Drive - Suite 112
Fayetteville, North Carolina 28306
910-426-6777
sbrown(&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.
Seal
Signature of Designer
Date

DRAINAGE AREAS
1
Is this a high density project?
No
2
If so, number of drainage areas/SCMs
0
3
Does this oroiect have low densit areas?
Yes
4
If so number of low 4-ify drainage areas
1
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
LD 1
4
Type of SCM
Low Density
5
Total drainage area (sq ft
2,740,015
2,740,015
6
Onsite drainage area (sq ft
21740,015
21740,015
7
Offsite drainage area (sq ft
8
Total BUA in project (sq ft
9permitting)
New BUA on subdivided lots (subject to
s ft
547109 sf
547109 sf
10
New BUA not on subdivided lots (subject to
permitting) (sf)
108843 sf
108843 sf
11
Offsite BUA (sq ft
12
Breakdown of new BUA not on subdivided lots:
- Parking (sq ft
- Sidewalk (sq ft
60 sf
60 sf
- Roof (sq ft
- Roadway s ft
108783 sf
108783 sf
- Future (sq ft
- Other, please specify in the comment box
below (sq ft
13
New infiltrating permeable pavement on
subdivided lots (sq ft
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
15permitting)
Existing BUA that will remain (not subject to
s ft
1626 sf
1626 sf
16
lExistina BUA that is already permitted (sq ft
17
Existing BUA that will be removed (sq ft
18
Percent BUA
24%
24%
19
Design storm inches
20
Design volume of SCM cu ft
21 Calculation method for design volume
ADDITIONAL INFORMATION 11111111F-
JlPlease use this space to provide any additional information about the
22 drainage area(s):

LOW DENSITY
DESIGN
REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 021-1 .1003
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)
3:1
5
1 Maximum velocity in the vegetated conveyances during the 10-year storm?
4.5
6
JAre curb outlet swales proposed?
No
7
Maximum longitudinal slope of curb outlet swale(s) (%)
n/a
8
Bottom width of curb outlet swale(s) (feet)
n/a
9
Maximum side slope of curb outlet swale(s) (H:V)
n/a
10
Minimum length of curb outlet swale(s) (feet)
n/a
11
Are treatment swales used instead of curb outlet swales?
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
ADDITIONAL INFORMATION
15 1131ease use this space to provide any additional information about this low density project:
Swale
#
Drainage
Area
ac
BUA
(ac)
Pervious
area
ac
C
Q
(cfs)
Slope
( % )
V,,,o,,,
(fps)
V-,
(fps)
Flow depth
(ft)
1
0.58
0.13
0.45
0.45
2.07
0.64
4.50
1.42
0.62
2
3.40
026
3.14
0.35
7.53
0.64
4.50
1.96
1.05
3
0.45
0.10
0.35
0.45
1.60
0.50
4.50
121
0.58
4
2.95
0.68
227
0.45
10.50
0.50
4.50
1.94
126
5
0.78
0.18
0.60
0.45
2.78
1.00
4.50
1.81
0.64
6
3.19
0.74
2.45
0.45
9.08
0.70
4.50
2.13
1.11
7
4.01
0.93
3.08
0.45
11.42
1.00
2.00
1.30
1.63
8
027
0.08
0.18
0.50
1.06
0.50
4.50
1.10
0.50
9
3.87
0.89
2.97
0.45
13.78
0.50
4.50
2.08
1.41
10
0.58
0.13
0.44
0.45
2.05
1.00
4.50
1.68
0.57
11
1.12
026
0.86
0.45
4.00
0.50
4.50
1.53
0.85
12
1.61
0.37
124
0.45
5.74
0.50
2.00
1.67
0.99
13
1.87
0.43
1.44
0.45
6.66
0.30
2.00
1.44
1.17
14
0.64
0.15
0.49
0.45
228
220
4.50
2.31
0.50
15
1.32
0.30
1.01
0.45
4.70
1.70
4.50
2.52
0.71
16
0.15
0.05
0.11
0.50
0.60
1.30
4.50
1.35
0.31
17
0.12
0.04
0.08
0.50
0.48
1.50
4.50
1.36
028
18
0.10
0.03
0.07
0.50
0.39
1.50
4.50
128
025
19
022
0.05
0.17
0.45
0.79
1.00
4.50
1.32
0.37
20
022
0.05
0.17
0.45
0.77
1.00
4.50
1.31
0.37
21
0.41
0.09
0.32
0.45
1.47
1.60
4.50
1.84
0.44
22
0.68
0.16
0.52
0.45
2.41
1.60
4.50
2.08
0.54
23
0.82
0.19
0.63
0.45
2.91
0.50
4.50
1.41
0.75
24
1.70
0.39
1.31
0.45
6.07
0.50
4.50
1.70
1.01
25
0.48
0.11
0.37
0.45
1.70
3.30
4.50
2.49
0.40
26
0.37
0.09
029
0.45
1.33
3.30
4.50
2.33
0.36
27
0.18
0.04
0.14
0.45
0.63
0.70
4.50
1.07
0.36
28
0.09
0.04
0.06
0.55
0.40
0.70
4.50
0.97
0.30
29
4.97
1.15
3.82
0.45
17.72
020
2.00
1.57
1.86
30
022
0.05
0.17
0.45
0.77
2.70
4.50
1.91
0.30

1838-Supplement EZ continued
Drainage
Swale # Area
ac
BUA
(ac)
Pervious
area
ac
C
Q
(cfs)
Slope
(%)
Va„°w
(fps)
Vactual
(fps)
Flow
depth (ft)
31
0.11
0.02
0.08
0.45
0.37
2.70
4.50
1.60
0.22
32
2.27
0.52
1.74
0.45
1 8.08
0.50
4.50
1.82
1.14
33
0.93
0.21
0.71
0.45
3.30
0.50
4.50
1.46
0.79
34
1.04
0.24
0.80
0.45
3.69
0.50
4.50
1.50
0.83
35
0.27
0.10
0.16
0.55
1.16
0.50
4.50
1.12
0.51
36
0.31
0.07
0.24
0.45
1.11
1.20
4.50
1.53
0.41
37
0.15
0.06
0.09
0.55
0.66
1.20
4.50
1.36
0.34
38
3.13
0.72
2.41
0.45
8.91
1.00
2.00
1.22
1.48
39
0.37
0.08
0.28
0.45
1.31
0.50
4.50
1.15
0.54
40
0.30
0.07
0.23
0.45
1.06
0.50
4.50
1.10
0.50
41
0.73
0.17
0.56
0.45
2.60
2.90
4.50
2.65
0.49
42
0.71
0.16
0.54
0.45
2.52
3.00
4.50
2.65
0.48
43
1.32
0.30
1.01
0.45
4.69
0.50
4.50
1.59
0.91
44
1.28
0.30
0.99
0.45
4.57
0.50
4.50
1.58
0.90
45
0.08
0.03
0.05
0.55
0.34
3.00
4.50
1.54
0.18
46
0.16
0.06
0.10
0.55
0.71
3.00
4.50
1.93
0.28
47
6.53
1.51
5.02
0.45
18.60
0.30
2.00
1.85
1.75
48
5.89
1.36
4.53
0.45
16.77
0.50
2.00
1.14
2.13
49
50
51
52
53
54
55
56
57
58
59
60