20090597 Ver 5_2021-03-18 Wet Pond Supplement Form Signed_20210318

SUPPLEMENT-EZ COVER PAGE
r'RM5rt
PROJECT INFORMATION
1
Project Name
CCEP - Lott*
2
Prolect Area (ac)
24.05
3
Coastal Wetland Area (ac)
0
4
Surface Water Area (ac)
0
5
Is this project High or Low Density?
High
6
Does this project use an oft -site SCM?
No
COMPLIANCE WITH 0211 .1003(4)
7
Width of vegetated setbacks provided (feet)
50
8
Will the vegetated setback remain vegetated?
Yes
9
Is BUA other that as listed in .1003(4)(c-d) out of the setback?
No
10
Is streambank stabilization proposed on this project?
Ns
'NUMBER AND TYPE OF SCMs:
11
Infiltration System
0
12
Biaretentlon CeI1
0
13
Wet Pond
1
14
Stormwater Wetland
0
15
Permeable Pavement
0
16
Sand Filter
0
17
Rainwater Harvesting (RWH)
0
18
Green Root
0
19
Level Spreader -Filler 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
Filters
0
fORi15 LOADED
DESIGNER.CERTIFICATION
27
Name and Title:
Mitch Craig, PE - Principal/Project Manager
28
Organization:
CE Group, Inc.
29
Street address:
301 Glenwood Avenue, Suite 220
30
City, State, Zip:
Raleigh, NC 27603
31
Phone number(s):
[phone] ext. 108
32
Email:
MItch®CEGrvupInc.com
rectification Statement
I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or
superviesion; that die Information provided in the
st of my knowledge end belief true, accrete. and complete, and that
the engineering plans eped!{catons, operation and le� agreements and other supportlrg irdannatlon are consistent web the
information proirded here.

DRAINAGE AREAS
1
2
3
1s this a high density project?
If so, number of drainage areas.'SCMs
Is all/part of this project subject to previous rule
versions?
Yes
1
No
1
F�RM5LOAD ED
DRAINAGE AREA INFORMATION
gntir+e AI!a
V _ # •'
4
Type of SCM
Wet Pond
5
Total BUA in p_rotct Ssq_ft)
376186 sf
372282 sf ,
6
New BUA on subdivided Tots (subject to permitting)
(sq ft)
7
New BUA outside of subdivided Tots (subject to
permitting) (sf)
376188 sf
1
372282 sf _
8
Offsite - total area (sq ft)
9
Offsite BUA (sq ft)
10
Breakdown of new BUA outside subdivided lots:
- Parking (sq ft)
8083 sf
8063 sf
- Sidewalk (sq ft)
1117 sf
1117 sf
- Roof (sq ft)
117585 sf
117585 sf
- Roadway (sq ft)
19238 sf
15332 sf
- Future (sq ft)
162899 sf
162899 sf
- Other, please specify In the comment box
below (sq ft)
87286 sf
67288 sf
11
New infiltrating permeable pavement on
subdivided Tots (sq ft)
,
12
New infiltrating permeable pavement outside of
subdivided Tots (sq ft)
,
13
Exisitng BUA that will remain (not subject to
permitting) (sq ft)
14
Existing BUA that is already permitted (sq ft)
i
15
Existing BUA that will be removed (sq ft)
16
Percent BUA
36%
49%
17
Design storm (inches)
1 in
18
Design volume of SCM (cu ft)
35473 cf I
19
Calculation method for design volume
Simple Method
ADDITIONAL_
INFORMATEON
20
Please use this space to provide any additional information about the
drainage area(s):
Other BUA: Loading Dock Area and Gravel Firs access drive

WET POND
1
Drainage area number
1
2
Design volume of SCM (cu ft)
- .. 4 Mtn MO 149G
35473 c1
. L-i...
3
Vim
_
Is the 5CM sized to treat the SW from all surfaces at buid-out?
4.
Is the SCM located away from contaminated sans?
Yes
5.
What are the side slopes of the SCM (H V)?
a1
6
Does the SCM have retaining walls. gabion walls or other engineered
side slopes?
No
7
Are the inlets. outlets, and receiving stream protected from erosion
(10-year storm)?
Yes
Is there an overflow or bypass for inflow volume In excess of the
8 design volume?
Yes
9
What is the method for devralmir9 the SCM for maintenance?
Pump (preferred)
10
If applicable, will the SCM be cleaned out after construction?
Yes
11
Does the maintenance access comply with General MDC (8(?
Yes
12
Does the drainage easement comply with General MDC (9)7
Yes
13
If the SCM is on a single family lot, does (win) the plat comply with
General MDC (10)?
14
Is there an O&M Agreement that complies with General MDC (11)?
.
Yes
15
Is there an O&M Plan that complies with General MDC (12)7 —
_
Yes ,
18
Does the SCM follow the device specific MDC?
'Yes
17
Was the SCM designed by an NC licensed pro'essional?
IPDc FROM 4 H ,1053
Yea
r
«,i a+
18
19
Method used
Hasa stage/storage table been provided In the calculations?
20
Elevation of the excavated main pod depth (bottom of sediment
removal) (fmst)
248.00
21.
Elevation of the main pool bottom -(top of sediment removal) (fmsl)
249.00
22
23
Elevation or the bottom of the vegetated shelf (fmsl)
255.00
Elevation of the permanent pod (fmsl)
255.50
24
Elevation cif the top of the vegetated shelf (fms1)
58.00
25
Merface
Elevation of the temporary pod (fmst)
257,00
area of the main permanent pool (aquare feet)
171481
27
Volume of the main permanent pod (cubic feet)
71,494 ni
28
Average depth of the main pod (feet)
4.48 fl
29 Average depth equation used
Equation 2-
30 If using equation 3, main pod perimeter (feet)
31
32
If using equation 3. width of submerged wig shelf {feet)
Volume of the forebay (cubic feel)
124E of
33 Is this 15-20% of the volume In the main pod?
Yes
34
Clean -out depth for forebay (Inches)
12 In
35
Design volume of SCM (cu ft)
35413 col
38
Is the outlet an o-Trce or a weir?
Orifice
37
If orifice, orifice diameter (Inches)
3 M
38
If weir. well hegl4 (inches)
39
If weir, weir length !inches)
40
Drawdown time for (he temporary pool (days)
_ 3.9
_ 41
42
Are the inlet(s) and outlet located in a manner that avoids short-
ckcuitllg? _ Yea
Are berms or baffles provided to Improve the flow path? Yes
43
Depth of forebay at entrance (inches) 90 In
44
45
Depth of forebay at exit (Inches) 78 In
Does water Bow out of the forebay Ina nonerosive mamer? Yes
46
Width of the vegetated shelf {feet} 8 1t
47
48
Slope of vegetated shelf (HFV)
8:1
Does the orifice draws own from below the top surface of the
permanent pool?
- -
Yes
49
Does the pond minimize Impacts to the receiving channel from the 1-
yr, 24-hr storm?
Yes
50
Are fountains proposed? (If Y. please provide documentation Thal
MDC(9) Is met I
No
51
Is a trash rack or after device provided to protect the outlet system?
Yes
52
Are the dam and embankment planted in non -clumping turf grass?
Yes
Bermuda
53
—
&d'has
Species of turf that will be used on the dam and embankment
a planting plan been provided for tFYr vegetate stern
Yes I
• NAL INFORMATION 1
'Please
55
use Otis space to provide any additional information about the
wet pond(s):
wet Pans
3
10:50 AM 3/18/2021