SW4220801_Supplement-EZ Form_20221208

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1
Project Name
Newlin Meadows
2
Project Area ac
30.61
3
Coastal Wetland Area ac
0
4
Surface Water Area ac
0.48
5
Is this project High or Low Density?
Low
6
1 Does this project use an off -site SCM?
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 ?
No
10
Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration System
0
12
Bioretention Cell
0
13
Wet Pond
0
14
Stormwater Wetland
0
15
Permeable Pavement
0
16
Sand Filter
0
17
Rainwater Harvesting (RWH)
0
18
Green Roof
0
19
Level Spreader -Filter Strip LS-FS
0
20
Disconnected Impervious Surface (DIS)
0
21
Treatment Swale
0
22
Dry Pond
0
23
StormFilter
0
24
Silva Cell
0
25
Bayfilter
0
26
Filterra
0
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
Chad E. Abbott, PE
28
Organization:
C3 Design and Engineering, PLLC
29
Street address:
2537 East Lyon Station Road, Suite 102
30
City, State, Zip:
Creedmoor, NC 27522
31
Phone numbers :
919-230-0996
32
Email:
[e-mail]
Certification Statement:
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.
Signature of Designer
11-1 � 2d2Z
Date

DRAINAGE AREAS
1 1 Is this a high density project? 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 1
Is all/part of this project subject to previous rule
5 iversions? No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
LD 1
4
Type of SCM
NA
NA
5
Total drainage area (sq ft)
1333281
1333281
6
Onsite drainage area (sq ft)
1333281
1333281
7
Offsite drainage area (sq ft)
8
Total BUA in project (sq ft)
273779 sf
273779 sf
9
New BUA on subdivided lots (subject to permitting)
(sq ft)
248779 sf
25000 sf
248779 sf
25000 sf
10
New BUA not on subdivided lots (subject to
permitting) (sf)
11
Offsite BUA (sq ft)
sf
sf
12
Breakdown of new BUA not on subdivided lots:
- Parking (sq ft)
sf
sf
- Sidewalk (sq ft)
sf
sf
- Roof (sq ft)
sf
sf
- Roadway (sq ft)
25000 sf
25000 sf
- Future (sq ft
sf
sf
- Other, please specify in the comment box
below (sq ft)
sf
sf
13
New infiltrating permeable pavement on subdivided
lots (sq ft) sf
New infiltrating permeable pavement not on
subdivided lots (sq ft) sf
sf
14
sf
15
Existing BUA that will remain (not subject to
permitting) (sq ft)
sf
sf
16
Existing BUA that is already permitted (sq ft)
sf
sf
17
Existing BUA that will be removed (sq ft)
sf
sf
18
Percent BUA
21 %
21 %
19
Design storm (inches)
NA
NA
20
Design volume of SCM (cu ft)
NA
NA
21
Calculation method for design volume
NA
NA
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
ALL DRAINAGE FLOWS WEST TO MOTES CREEK

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .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?
3.64
6
Are curb outlet swales proposed?
No
7 1
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?
No
12
Is stormwater released at the edge of the setback as dispersed flow?
I Yes
13 1
Have stormwater outlets been designed to prevent downslope erosion?
Yes
14 1
Are variations to rule .1003 proposed?
No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project:
N/A
Swale
#
Drainage
Are
Area
(ac1
BUA
(ac)
Pervious
area
ac
C
Q
(cfs)
Slope
N
V,ii°„,
(fps)
Van„ai
(fps)
Flow depth
(ft)
0.66
0.25
0.41
0.49
2.56
4.20
5.00
3.04
0.53
2
2.21
0.71
1.50
0.44
7.70
3.25
6.00
3.64
0.84
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30