SW3210101_800- Signed EZ Form_20210324

SUPPLEMENT-EZ COVER PAGE
I FORMS LOADED
PROJECT INFORMATION
1
Project Name
The Glenns
2
Project Area (ac)
46.95 Acres
3
Coastal Welland Area (ac)
N/A
_4 .
5
Surface Water Area (ac)
N/A
Is this project High or Low Density?
Ifth
6 Does this project use an off -site SCM?
No
[COMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setba�rovid�eecl (feetl_
8 Will the vegetated setback remain vegetated?
9 , Is BLIA other that as listed in .1 003(4)(c-d) out of the setback?
10 1 Is streambank stabilization proposed on this project?
N/A
Yes
No
NUMBER AND TYPE OF SCMs:
1 Infiltratiw System 0
12 Bioretention Cell
0
13 Wet Pond
2
Stormwater Wetland
0
._�114
15 Permeable Pavement
0
16
1 Sand Filter
0
0
0
0
17
18
Rainwater Harvestino (RWH)
Green Roof
19
Level Spreader -Filter Strip (LS-FS)
20
Disconnected Impervious Surface QIS)
0
21
Treatment Swale
0
22
Dry Pond
0
23
StormFilter
0
24
Silva Cell
0
25
26
§_q)(filter
Filterra
0
L 0
I FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title:
Michael D. Duval, PE Project Manaa r
2a
OEgaruzatm;
The John R. McAdams Company,, In
29
Street address:
3430 Toringdon Way, Suite 110
30
C�y., State, Zip:
Charlotte, NC M77
31
Phone riumber(s):
704.527.0800
32
Email:
[e-mail]
certifit'glion sleternent�
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,
"\ � , % I % I I I i I I , I
\A CA
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048769
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Signature of Designer
3/1-7/9L \
Date

DRAINAGE AREAS
1
5
1 Is this a hiah density�project?
Yes
2
f So , number of drainage areas/SCMs
f.,.i
2
r 3
F 1 , part of this project subject to previous rule
rVI.-I
ons?
No
I- FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
2
-4 Type of SCM
Total BUA in project s ft)
Wet Pond
Wet Pond
613936 sf
318873 sf
295063 sf
—5
New BUA on subdivided lots (subject to permitting)
6 (sq_ft)_
230411 sf�
24961 -sf
205450 sf
-
New BUA outside of subdivided lots (subject to
-7 p
169258 sf
79645 sf
89613 sf
8 Offsite - total area (sq.ft)
223343 sf
223343sf
9
Offsite BUA (sq 1).
66533sf
66533 sf
10
Breakdown of new BUA outside subdivided lots:
Parking (sq ft)
-
-
-
Sidewalk (sg ft)
51560 sf
29349 sf
22211 sf
Roof (sq ft)
-
-
Roadway (sq ft)
117698 sf
50296 sf
67402sf
Future (sq ft)
-
Other, please specify in the comment box
below Jsq ft)
11
New infiltrating permeable pavement on
subdivided lots (sq ft)
12
New infiltrating permeable pavement outside of
l subdivided lots (sq ft)
13
Exisitng BUA that will remain (not subject to
permitting) (sq ft)
66533sf
66533 sf
14
Eyisbna BUA that is already permitted (sq ft).
66533sf
66533 sf
15
Existing BUA that will be removed (sq ft)
16
Percent BUA
30%
33%
23%
17
pEsiarLstorm (inches)
-
1 in
1 in
18
Design volume of SC M (cu ft)
33397 cf
23472 cf
I
19
Calculation method for design volume
SA/DA
SAIDA
— —
ADDITIONAL INFORMATION
TPlease use this space to provide any additional information about the
20 ldrainage area(s):

WETPOND
I 10ro1nage area number
I 1
1 2
21 Design volume cyf SCM (cu ft)
GENERAL -MIX FROM 02H . 10
3, Is the SCM sized to treat the SW from all surfaces at build -out?
L 33397 cf
23472 cf
Yes V.�s
4
Is the SCM located away from contaminated soils?
Yes
Yes
5
What are the side slopes of the SCM (H:Y)?
3:1
3:1
6
Does the SCM have retaining walls, gabion walls or other engineered
side slopes?
No
No
7
Are the inlets, outlets, and receiving stream protected from erosion
(1 0-year storm)?
Yes
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
design volume?
Yes
Yes
9
What is the method for dewatering the SCM for maintenance?
Pump (preferred)
Pump (preferred)
10
If eipPI(Cilble. Will ft SCM be cleaned out after congrijapril?
Yes
Yes
11
Does the maintenance access comply with General MDC_(8)?
Does the drainage easement comply with General M15C (9)?
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC (10)?
Is there an O&M Agreement that complies with General MDC (11)?
To —thwe. an G&M Plan that complies with Genwil MDC (12)7
Does the SCM follow the device specific MDC?
Yes
Yes
12
Yes
Yes
131
No
No
14
Yes
Yes
15
Yes
Yes
16
Yes
Yes
17 Was the SCM designed by an NC licensed professional?
WET POND MDC FROM 02H .105
18 Method used
19 Has a stagefstorage table been provil In the calculaons?
yba
SAJDA
yed
SA/DA
Yes
Yes
20
Elevation of the excavated main pool depth (bottom of sediment
removal) (fmsl)
567.00
569.00
21
Elevation of the main pool bottom -(top of sediment removal) (fmsi)
571.50
572.40
22.
Elevation of the bottom of the vegetated shelf (finsl)
572.00
573.50
23
Elevation of the permanent pool (fmsi)
572.50
574.00
24
Elevation of the top of the vegetated shelf (fmst)
'�ie_vation oF%—a iemp--ry PEKA (frrw)
Surface area of the main -permanent pool �square feet)
573.00
674.60
25
573.30
574.50
26
37552:1
42468:1
27
_kj
Volume of the main permanent pool (cubic feet)
Average depl� ofiiie m-ewin—pool #sei�
123084 cf
124235 cf
3.84 ft
3.68 It
29
Average depth equation used
Equation 2
Equation 2
30
If using equation 3, main pool perimeter (feet)
31
�_using equatlan 3. width of submerged veg. shelf (feet)
32
Volume of the forebay (cubic feet)
21062 cf
32022 cf
33 T�This 15-270% ;Ft -he volume in the main pool?
34 Clean -out depth for foreWy (Inches)
Yes
Yes
12 in
19 in
35 DeWp VoiUme of SCM (cU ft)
33397 cf
23472 cf
36 Is the outlet an orifice or a weir?
Orifice
Orifice
37 If orifice, orifice diameter (inches)
3 in
3 in
38 FrW_!j� Weir height pmhas)
39 ei r, weir length (Inches)
-
40. Drawdown time for the temporary pool (days)
3.57
4.13
Are ffie inlet(s) and outlet located in a manner that avoids short-
41 circuiting?
Yes
Yes
—421Are
bemns or baffles proVided to Improve the flow path?
Yes
Yes
43
Depth of for" at entrance @tchesj
66 in
60 in
44
Depth of forebay at exit (inches)
Does wate_rflow out oft—ho forebay In a non-eFasimeman-ner?
66 in
60 in
45
Yes
Yes
46
Wi of the vagetated shelf (feet)
6 ft
6 ft
47
Slope of vegetated shelf (H:V)
6:1
6:1
48,permanent
Does the orifice drawdown from below the top surface of the
pool?
No
Yes
49
oes the pond minimize impacts to the receiving channel from the 1-
yr, 24-hr storm?
Are fountains proposed? (if Y, please provide documentation that
MDC(9) is met.)
Yes
Yes
50
No
No
51
Is a trash rack or other device provided to protect the outlet system?
Yes
Yes
52
Are t e dam and embankment planted in non -clumping turf grass?
Yes
Yes
53
. es of turf that wffl be Used on Um dam and embankment
Tall Fescue
Tall Fescue
54
Has a pTanting plan been . provided _for_ffie­ve6�_tated_sh__elf?
Yes Yes
ADDITIONAL INFORMATION
PTetapsoenuse this space to provide any additional information about the
55 we d(s):
Wet Pond 3 5:01 PIM 3/17/2021