SW3210802_Supplement-EZ Form_20211021

SUPPLEMENT-EZ COVER PAGE
rQF.rr1S LOAD[ 3
al Wetland Area (j
re Water Area Lam proAct H or Low Dens
this orolect use an off site SCM?
latex at Marvin B►anah --
28.481
0
0.77
No
NUMBER AND TYPE OF SCMs;
11
Infiltration Slotem
12
Bioretention Cell
Wet Pond
13
14
Storrmwater Wetland
15
16
Permeable_ Pavement
Sand Filter
17
Rainwater Harvesting RWH
18
Green Roof
19
Level Spreader -Filter Strip S-FS
20
Disconnected Impervious Surface D( IS) —
21
Treatment Swale
22
D. Pond --
-- --
3.-
24
StomtFllter
Silva Cell
Bayfliter
F.'terra
25
26
27
28
Name and Title;-..._ - . -.. —... -.--.---- .--....... -. -.-. -._-- . -.... -. --
O antzatlon:
-....-.-_---Mason Greeson.PE Director--_---
C;,dD,,tgn
29
Street address:
223 North Graham Street
30
31
C State Z
Phone numb s :
Email:
Charlotte, NC-28202
704-333.0325
32
[e-mail]
I certify, under penally of law that this Supplement-EZ form and all supporting Information were prepared under my directlort or supervision; that the
Information provided to the form Is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans,
specifications. operation end maintenance agreements and other supporting information are consistent with the Information provided here.
N APO
:4 SEAS.
0431G8
sJalll)111����
Signature of Designer
Date
/P • Z/ • ZOL/

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 are
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
Curb Cut w/ grass
swale
Curb Cut w/ grass
swale
5
Total drainage area (sq ft
1,207,091
1,207,091
6
Onsite drainage area (sq ft
1,207,091
1,207,091
7
Offsite drainage area (sq ft)
0
0
8
Total BUA in project (sq ft
236854 sf
236854 sf
9
New BUA on subdivided lots (subject to permitting)
(sq ft
176000 sf
176000 sf
10permitting)
New BUA not on subdivided lots (subject to
s
Offsite BUA (sq ft
Breakdown of new BUA not on subdivided lots:
60854 sf
60854 sf
11
sf
sf
12
- Parking (sq ft
sf
sf
- Sidewalk (sq ft
11156 sf
11156 sf
- Roof (sq ft
- Roadway (sq ft
- Future (sq ft
- Other, please specify in the comment box
below (sq ft
New infiltrating permeable pavement on subdivided
lots (sq ft
sf
sf
49698 sf
49698 sf
sf
sf
13
sf
sf
14
New infiltrating permeable pavement not on
subdivided lots (sq ft
sf
sf
15permitting)
Existing BUA that will remain (not subject to
s ft
sf
sf
16
1 Existing BUA that is already permitted (sq ft
sf
sf
17
Existing BUA that will be removed (sq ft
sf
sf
18
Percent BUA
20%
20%
19
Design storm inches
7.6 in
7.6 in
20
Design volume of SCM cu ft
21
lCalculation method for design volume
ADDITIONAL
INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):

LOW DENSITY
DESIGN
REQUIREMENTS FOR LOW DENSITY PROJECTS FROM 02H .1003 JIM
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)
sf
5
Maximum velocity in the vegetated conveyances during the 10-year storm?
5
6
Are curb outlet swales proposed?
Yes
7
Maximum longitudinal slope of curb outlet swale(s) (%)
5
8
Bottom width of curb outlet swale(s) (feet)
2 ft
9
Maximum side slope of curb outlet swale(s) (H:V)
31
10
Minimum length of curb outlet swale(s) (feet)
100 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?
I N/A
13
lHave stormwater outlets been designed to prevent downslope erosion?
Yes
14
JAre variations to rule .1003 proposed?
No
ADDITIONAL INFORMATION
15 Please use this space to provide any additional information about this low density project: