SW4220801_Supplement-EZ Form_20220825

DurrLCinCN i CL l+V V CM r l-k"C
FORMS LOADED
ROJECT INFORMATION
1 Proj_ect Name_ _
2 1 Proiect Area fact
Coastal Wetland Area ac
4 Surface Water Area ac
5 Is this project if h or_Low Density? — _ _
6 Does this project use an off -site SCM?
..-......._....
OMPLIANCE WITH 02H .1003(4)
7 Width of vegetated setbacks provided (feet)
_8 -' Will the vegetated_ setback remain vegetated?
9_ If BUA is proposed in the setback, does it meet NCAC
10 Is streambank stabilization proposed on this project?
21
Treatment Swale
_
..... -------
D_ry Pond__
23
...... _ _......
StormFilter
24
Silva Cell
27 Name and Title
28 iOrnanization:
32
address:
Newlin Meadows
31.09
0
0.48
Low
No
0
Chad E. Abbott, PE
3 Design and Engineeriglh C --
'_East Lyon Station Road, Suite 102____
[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.
,CARD!
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Signa ure of Designer

DRAINAGE AREAS
1 Is this a high densjjproject? No
_2 If so, number of drainage areas/SCMs p
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 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site
4 Type of SCM NA
LD 1
5
Total drainage area (sq ft1333281
6
Onsite drainage area (sq ft 1333281
7
Offsite drainage area sq ft)
Total BUA inproiect (sq ft) 273779 sf
New BUA on subdivided lots (subject to permitting)
Lsq ft) 248779 sf
New BUA not on subdivided lots (subject to
ermittin s +-
Offsite BUA (soft) sf
Breakdown of new BUA not on subdivided lot-Parkink (sq_ft'sf
8
9
10
11
12
- Sidewalks ft
sf
-Roof (sq ft)
sf
- Roadway (sq ft)
sf
- Future (sq ft) _ _ sf
- Other, please specify in the comment box
below (sq ft) sf
New infiltrating permeable pavement on subdivided
lots (sq ft) sf
New infiltrating permeable pavement not on
subdivided lots (sgft)_ sf
Existing BUA that will remain (not subject to
permq!in s ft) sf
Existing BUA that is alread r ermitted (sq ft) sf
13
14
15 1
16
17 I
18 ;
Existing BUA that will be removed (sq ft)_sf
Percent BUA
_
�21 % _
19 Desn storm inches) NA
20 ; Design volume of SCM (cu ft) NA
21 Calculation method for design volume NA
ADDITIONAL INFORMATION
Please use this space to provide an additional information z
p p y tion about the
22 drainage area(s):
_ _
ALL DRAINAGE FLOWS WEST TO MOTES CREEK

LOW DENSITY
DESIGN REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H AW3
1 Is project below density thresholds set forth in the -applicable stormwater rule? Yes
2 Does project maximize di8 ersed flow and minimize channelization of flow?
--- _ Yes
3 Has the use of piping been minimized per .10C 2
4 I Side slopes of the vegetated conveyances (H:V) _ -- - - 3 sf
-t-
5 I Maximum velocity in the va�etated conveyances durire 10 year atorm7 3.64
6 Are curb outlet swales proposed? No
-- -. u O (feet)
_.
7 Maximum longitudinal outlet
w curb outlet swale s °k - _----- ^ -- -_-------- 7 NIA
_ r
8 Bottom width of curb outlet Swale s feat N/A
9 I Maximum side slope of curb outlet $wale(s) (H _V) NIA
10 Minimum length of curb outlet swale(s) Meet) N/A
11 Are treatment swales used instead of curb outlet swales? Yea
-- --r - _
12 i Is stormwater released at the edge of the setback as dispersed flow? Yea
13 Have $tomtwater outlets been designed to prevent downslope erosion? Yes
14 Are variations to rule .1003 proposed? No
ADDITIONAL INFORMATION
15 j Please use this space to provide _any Information about this low density project:
N/A
Swale
#
Drainage i Pervious
Area BUA area C 4 Slope V.s.., V., l Flow depth
ae (ac) o (cfs) M (fps) (fps) (ft)
1
2
3
0.66
2.21
1.97
0.26
0.71
0.69
0A1
--
1.50
1.28
0.49
----
0.44
0.46
2.56
-
7.70
7.18
4.20
- 8.00
6.00
5.00
j 3.04
3.64
fi 2.65
i 0.53
0.84
0.95
3.25
1.45
4
0.85
5.00
2.77
0.49
0.11
0.74
0.30
2.02
3.83
7
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