SW6220703_Supplement-EZ Form_20220810

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 lProiectName
Project Area (ac)
Coastal Wetland Area (ac)
Surface Water Area (ac)
Is this project High or Low Density?
Does this protect use an off -site SCM?
a Hills Subdivision
115.81
0
0.15
Low
No
COMPLIANCE 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 ?
Yes
10
1 Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration S stem
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
4D Site Solutions Inc.
409 Chicago Dr. Ste. 112
Fayetteville, NC 28306
910-426-6777
rrown(&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
5
Total drainage area (sq ft
115.96
115.96
6
Onsite drainage area (sq ft
115.96
115.96
7
Offsite drainage area (sq ft
0
0
8
Total BUA in project (sq ft
885648 sf
885648 sf
9permitting)
New BUA on subdivided lots (subject to
s ft
676000 sf
676000 sf
10
New BUA not on subdivided lots (subject to
permitting) (sf)
209648 sf
209648 sf
11
Offsite BUA (sq ft
sf
sf
12
Breakdown of new BUA not on subdivided lots:
- Parking (sq ft
- Sidewalk (sq ft
- Roof (sq ft
- Roadway s ft
209648 sf
209648 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
16
lExistina BUA that is already permitted (sq ft
17
Existing BUA that will be removed (sq ft
18
Percent BUA
18%
18%
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 sf
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
5
6
Are 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?
n/a
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 JPlease use this space to provide any additional information about this low density project:

Designator
DA
Imp Af
Grass Ar
C
Q
SLOPE
Vallow
Vactual F Depth
SLOPE
BOTTOM
LINER
INTSTY
SF
Ditch #1
13.38
203991
378841
0.35
25.05
3.00%
5.00
8.06
0.94
3:1
0.5
C125
5.35
1.28
Ditch #2
0.33
10781
3594
0.75
1.96
8.20%
5.00
5.69
0.53
3:1
0.5
C125
7.93
1.64
Ditch #3
0.35
11435
3812
0.75
2.08
7.30%
5.00
5.52
0.39
3:1
0.5
C125
7.93
1.75
Ditch #4
0.39
8494
8494
0.50
1.24
4.60%
5.00
2.04
0.29
3:1
0.5
S75
6.35
1.47
Ditch #5
1.61
24546
45586
0.35
3.01
1.40%
5.00
1.74
0.57
3:1
0.5
S75
5.35
2.61
Ditch #6
0.22
7057
2352
0.75
1.28
2.00%
5.00
1.52
0.98
3:1
0.5
S75
7.93
2.72
Ditch #7
0.13
4247
1416
0.75
0.77
2.40%
5.00
1.44
0.40
3:1
0.5
S75
7.93
2.92
Ditch #8
0.94
14331
26615
0.35
1.76
2.80%
5.00
1.88
0.62
3:1
0.5
S75
5.35
1.82
Ditch #9
1.25
21780
32670
0.40
2.68
4.50%
5.00
2.50
0.80
3:1
0.5
5150
5.35
1.19
Ditch #10
0.09
2940
980
0.75
0.54
5.00%
5.00
1.68
0.67
3:1
0.5
S75
7.93
2.05
Ditch #11
0.89
15567
23350
0.40
2.27
6.40%
5.00
2.92
0.79
3:1
0.5
SC150BN
6.35
1.21
Ditch #12
0.21
6531
2799
0.70
1.19
3.60%
5.00
1.86
0.64
3:1
0.5
S75
7.93
1.78
Ditch #13
0.49
13874
7471
0.65
2.02
9.50%
5.00
6.01
0.33
3:1
0.5
C125
6.35
1.46
Ditch #14
0.17
2577
4785
0.35
0.47
10.10%
5.00
2.18
0.76
3:1
0.5
S75
7.93
1.2
Ditch #15
0.16
5227
1742
0.75
0.95
5.40%
5.00
2.06
0.83
3:1
0.5
S75
7.93
1.41
Ditch #16
0.74
14505
17729
0.45
2.11
7.00%
5.00
2.95
0.83
3:1
0.5
SC150BN
6.35
1.17
Ditch #17
0.10
3267
1089
0.75
0.59
7.00%
5.00
1.99
0.72
3:1
0.5
S75
7.93
1.47
Ditch #18
0.78
16988
16988
0.50
2.48
7.00%
5.00
3.05
0.69
3:1
0.5
SC150BN
6.35
1.23
Ditch #19
1.20
32931
19341
0.63
4.04
8.00%
5.00
6.63
0.80
3:1
0.5
C125
5.35
1.41
Ditch #20
0.15
4574
1960
0.70
0.83
4.50%
5.00
1.78
0.61
3:1
0.5
S75
7.93
2.11
Ditch #21
0.33
10781
3594
0.75
1.96
2.00%
5.00
1.69
0.58
3:1
0.5
S75
7.93
2.52
Ditch #22
1.08
35284
11761
0.75
6.42
4.00%
5.00
3.33
0.43
3:1
0.5
SC150BN
7.93
1.27
Ditch #23
0.56
18295
6098
0.75
3.33
4.80%
5.00
2.85
0.38
3:1
0.5
SC150BN
7.93
1.44
Ditch #24
0.67
21889
7296
0.75
3.98
5.50%
5.00
3.16
0.52
3:1
0.5
SC150BN
7.93
1.19
Ditch #25
0.23
7351
2450
0.75
1.34
5.50%
5.00
2.19
0.82
3:1
0.5
S75
7.93
1.43
Ditch #26
0.19
6106
2035
0.75
1.11
4.10%
5.00
1.88
0.87
3:1
0.5
S75
7.93
1.93
Ditch #27
1.48
35362
28933
0.55
5.15
9.00%
5.00
7.42
0.51
3:1
0.5
C125
6.35
1.14
Ditch #28
0.16
5074
1691
0.75
0.92
7.50%
5.00
2.22
0.66
3:1
0.5
S75
7.93
1.36
Ditch #29
3.30
50312
93436
0.35
6.18
1.10%
5.00
2.03
0.59
3:1
0.5
S75
5.35
2.61
Ditch #30
0.26
8494
2831
0.75
1.55
1.80%
5.00
1.53
0.39
3:1
0.5
S75
7.93
3.03
Ditch #31
3.38
51531
95701
0.35
6.33
1.50%
5.00
2.26
0.41
3:1
0.5
S75
5.35
2.02
Ditch #32
0.34
10245
4391
0.70
1.87
3.00%
5.00
1.93
0.91
3:1
0.5
S75
7.93
1.89
Ditch #33
0.38
11435
4901
0.70
1.67
4.80%
5.00
2.23
1.14
3:1
0.5
S75
6.35
1.39
Ditch #34
0.16
5315
1772
0.75
0.97
2.10%
5.00
1.43
1.30
3:1
0.5
S75
7.93
3.36
Ditch #35
0.75
24503
8168
0.75
4.46
4.80%
5.00
3.14
0.53
3:1
0.5
SC150BN
7.93
1.27
Ditch #36
0.14
4492
1497
0.75
0.82
3.90%
5.00
1.69
0.36
3:1
0.5
S75
7.93
2.35
Ditch #37
1.11
31429
16923
0.65
4.58
8.30%
5.00
6.98
0.40
3:1
0.5
C125
6.35
1.28