SW6220504_Supplement-EZ Form_20220926

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 j Project Name �^
2 Project Area ac
Cameron Village
42.3088
3
Coastal Wetland Area ac
-
4
Surface Water Area ac
-
5
Is this project High or Low Density?
High
6
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?
N/A
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
2
14
Stormwater Wetland
0
15
_
Permeable Pavement
0
16
ISand 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
1 Dry Pond
0
23
StormFilter
0
24
Silva Cell
0
25
BayflIter
0
26
Filterra
0
FORMS LOADED
IGNER CERTIFICATION
27
Name and Tltle:
Or anization:
Street address:
_ Carlo Pardo, PE
Bowman North Carolina, Ltd.
28
29
4006 Barrett Drive, Suite 104
30
City, State, Zip:
Raleigh, NC 27609
31 1
Phone numbers :
919-553-6570
32
Email:
[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
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Signature of Designer
Date

DRAINAGE AREAS
1 _
Is this a hi h density project?
Yes
2
If so, number of drainage areas/SCMs
3
3
Does this project have low density areas?
No
4
If so, number of low density drainage areas
0
5
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
2
3
4
Type of SCM
-
Wet Pond
Wet Pond
Bypass
5
Total drainage area (sq ft
1842972 sf
1141886 sf
552343 sf
13073
6
Onsite drainage area (sq ft
1842972 sf
1141886 sf
552343 sf
13073
7
Offsite drainage area (sq ft
8
Total BUA in.project (sq ft
744489 sf
475548 sf
260413 sf
8528 sf
9
New BUA on subdivided lots (subject to permitting)
(sq ft)
496000 sf
308000 sf
188000 sf
10permitting)
New BUA not on subdivided lots (subject to
(sf)
248489 sf
167548 sf
72413 sf
8528 sf
11
JOffsite BUA (sq ft
12
Breakdown of new BUA not on subdivided lots:
Parking (sq ft
Sidewalk (sq ft
67235 sf
46590 sf
18704 sf
1941 sf
Roof (sg ft
Roadway s ft
171236 sf
110940 sf
53709 sf
6587 sf
Future (sq ft
Other, please specify in the comment box
below (sq ft
10018 sf
10018 sf
13
New infiltrating permeable pavement on
subdivided lots (sq ft
14
New infiltrating permeable pavement not on
Isubdivided lots (sq ft
15permitting)
Existing BUA that will remain (not subject to
s ft
17230 sf
17230 sf
16
ExistinQ BUA that is already permitted (sq ft
17
Existing BUA that will be removed (sq ft
18
Percent BUA
40.40%
41.65%
47.15%
19
Design storm inches
1.0 in
1.0 in
20
Design volume of SCM cu ft
40424 cf
21832 cf 71
21
Calculation method -for design volume
Simple Method
Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
Drainage Area #1 - Pool Impervious Area = 10,018sf Drainage
Area #1 has been designed for an area of 1,866,124 sf with an impervious area of
900,331 sf. The future phase includes an additional 724,238 sf of drainage area with an
additional impervious area of 424,783 sf

WET POND
11
Drainage area number
1
2
2
1 Minimum required treatment volume cu ft)
40424 cf
21832 cf
GENERAL
MDC FROM 02H .1050
3
Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
Yes
4
Is the SCM located away from contaminated soils?
Yes
Yes
5
What are the side slopes of the SCM H: ?
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
(10- ear storm)?
Yes
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
desi n volume?
Yes
Yes
9
What is the method for clewatering the SCM for maintenance?
Pump (preferred)
Pump referred
10
If applicable. will the SCM be cleaned out after construction?
Yes
Yes
11
Does the maintenance access comply with General MDC (8)?
Yes
Yes
12
Does the drainage easement comely with General MDC (9)?
Yes
Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
General MDC 10 ?
N/A
N/A
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
Yes
M Is there an O&M Plan that complies with General DC 12 ?
Yes
Yes
A17
Does the SCM follow the devices ecific MDC?
Yes
Yes
Was the SCM designed by an NC licensedprofessional?
Yes
Yes
T POND
MDC FROM 02H .1053
18
Sizing method used
SA/DA
SA/DA
19
Has a sta a/stora a table been provided in the calculations?
Yes
Yes
20
Elevation of the excavated main pool depth (bottom of sediment
removal) (fmsl
251.00
250.00
21
Elevation of the main pool bottom (top of sediment removal) (fmsl)
252.00
251.00
221
Elevation of the bottom of the vegetated shelf (fmsl)
255.50
254.50
23
Elevation of the permanent pool fmsl
256.00
255.00
24
Elevation of the top of the vegetated shelf fmsl
256.50
255.50
25
Elevation of the temporary pool (fmsl)
257.80
256.30
26
Surface area of the main permanent pool (square feet)
51435
18440
27
Volume of the main permanent pool cubic feet
183364 cf
60353 cf
28
Avera a depth of the main pool feet
3.76 ft
3.59 ft
29
Average depth euation used
Equation 3
Equation 3
30
If using equation 3, main pool perimeter (feet)
975.0 ft
593.0 ft
31
If using equation 3 width of submerged veg. shelf feet
3.0 ft
3.0 ft
32
Volume of the foreba (cubic feet
35620 cf
9396 cf
33
Is this 15-20% of the volume in the mainpool?
Yes
Yes
34
Clean -out depth for foreba inches
24 in
24 in
351
Design volume of SCM cu ft
146649 cf
36180 cf
361
Is the outlet an orifice or a weir?
Orifice
Orifice
37
If orifice, orifice diameter (inches)
5.0 in
2.50 in
38
If weir, weir height inches
39
If weir, weir length inches
40
Drawdown time for the tem ora ool (days)
3.01
3.16
41
Are the inlet(s) and outlet located in a manner that avoids short-
circuiting?
Yes
Yes
42
j Are berms or baffles provided to improve the flowpath?
Yes
Yes
431
Depth of forebay at entrance inches
36 in
36 in
44
De th of fo bay at exit (inches)
30 in
30 in
45
Does water flow out of the forebay in a non -erosive manner?
Yes
Yes
46
Width of the vegetated shelf (feet)
6 ft
6 ft
47
Slope of vegetated shelf H:
6:1
6:1
48
Does the orifice drawdown from below the top surface of the
permanentpool?
Yes
Yes
49
Does the pond minimize impacts to the receiving channel from the 1-,
r 24-hr storm?
Yes
Yes
50
Are fountains proposed? (If Y, please provide documentation that
MDC(9) is met.
No
No
51
Is a trash rack or other device provided to protect the outlet system?
Yes
Yes
52
Are the dam and embankment planted in non -clumping turf grass?
Yes
Yes
53
Specie of turf that will be used on the dam and embankment
Hybrid Bermuda
Hybrid Bermuda
54
Hasa plantingtan been provided for the vegetated shelf?
Yes
Yes
AUD171ONAL
INFORMATION -
Please use this space to provide any additional information about
55 the wet pond(s):
Wet Pond 1
1:34 PM 9/26/2022