SW6211001_Supplement-EZ Form_20211129

SUIPP MEE-FZ COVFR PAGE
FORNAS LOADED
rRCJECT INFORMATION
1 � Project Name
2 Project Area ac __
3 Coastal Wetland Area (ac) ...
4 Surtace Water Area (so)
5 Is this project High or Low Density?
6 Does this project use an off -site SCM?
Road Apartrr
20.17
0
0 -
High
No
COMPLIANCE WITH 02H .1003(4) _
7 Width of vegetated setbacks provided (feet) n/a
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 ? N/A
10 Is streambank stabilization proposed on this project? No
NUMBER AND TYPE OF SCMs:
infiltration System
Bioretention Cell
--—
2
Wet Pond
Stormwater Wetland
` 15 Permeable Pavement
16
-
Sand Filter
17
Rainwater Harvesting (RWH) _
18
Green Roof
19
Level Spreader -Filter Strip LS-FS
20
IDisconnected Impervious Surface (DIS)
21
Treatment Swale
22
Dry Pond
23 StormFilter
24 Sity Cell
—
25
Ba filter
26
Filterra
FORMS LOADE
DESIGNER
CERTIFICATION
27
Name and Title
C. Scott Brown, PE - Vice President
28
,Organization:
_ _ 41D Site Solutions, Inc.
29
Street address:
409 Chicago Drive - Suite 112
30
City,State Zip:.Fayetteville,
North Carolina 28306
31
Phone numbers :
_ 910-426-6777
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.
H CARO4�'�,,
FES 'pa;�'j�
SEAL
027452 =
SONG 051�.
Signature of esigner
P_Zq'Z!
Date

1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
2
3
Does this project have low density areas?
No
4
If so, number of low density drainage areas
_0
Is all/part of this project subject to previous rule
5
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site 1 2
4 iTVPe of SCM
_ Wet Pond
_ 878,537 300,353
300,353
Wet Pond
238655
238655
5 Total drainage area (so ft)
6 Onsite drainage area (sq ft
7 Offsite drainage area ft
8 Total BUA inro ect ft
348854 sf
188578 sf
160276 sf
9ft
ew BUA on subdivided lots (subject to
rpermitting)
10
New BUA not on subdivided lots (subject to
rmittin sf
351226 sf
188578 sf
160276 sf
11
Offsite BUA ft
12
Breakdown of new BUA not on subdivided lots:
- Parking_( ft
-Sidewalk ft
35543 sf
22749 sf
12794 sf
- Roof ft
642136 sf
59267 sf
49769 sf
- Roadway s ft
157607 sf
81453 sf
73782 sf
- Future ft
- Other, please specify in the comment box
belowLsgft)
49040 sf
25109 sf
23931 sf
New infiltrating permeable pavement on
13 subdivided lots ft
New infiltrating permeable pavement not on
14 subdivided lots ft
Existing BUA that will remain (not subject to
15 perm ittin ft
16 Existin BUA that is already permitted ft
17 Existiqq_BUA that will be removed ft
18 Percent BUA
40%
63%
67%
19 Design storm (inches
20 Design volume of SCM (cu ft)_
21 Calculation method for design volume
ADDITIONAL_ INFORMATION
Please use this space to provide any additional information about the
22 1drainage areas):
1.0 in
1.0 in
28103 cf
23193 cf
Simple
Simple
"Other' impervious areas listed are to account for the water surface of the
ponds, providing more accurate routing results.

WET POND
i— 1 Drainage area number
2 Minimum required treatment volume (cu ft)
1
15404 cf 13030 cf
GENERAL MDC FROM 02H .1050
Is the SCM sized to treat the SW from all surfaces at build -out? Yes $ Yes
— - - —
4 Is the SCMM located away from contaminated soils - Yes Yes
5 What are the side slopes of the SCM H:V ? 3:1 3:1
6 i Does the SCM have retaining walls, gabion walls or other engineered
No
No
side slopes?
7
Are the inlets, outlets, and receiving stream protected from erosion
Yes
Yes
10- ear storm)?
8
Is there an overflow or bypass for inflow volume in excess of the
Yes
Yes
desi n volume?
9
What is the method for clewatering the SCM for maintenance?
Pump referred
Pump referred
10
1 If applicable, will the SCM be cleaned out after constriction?
Yes
Yes
11
Does the maintenance access comply with General MDC 8 ?
Yes
Yes
12
Does the drainage easement comply with General MDC 9 ?
Yes
Yes
13
If the SCM is on a single family lot, does (will?) the plat comply with
NIA
NIA
General MDC 10 ?
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
Yes
15' Is there an O&M Plan that complies with General MDC (12)? Yes Yes
16 Does the SCM follow the device specific MDC? _ Yes Yes
17 Was the SCM designed by an NC licensed professional? Yes Yes
WCT onkin Mnr FRnM n7H 1nSz
18 Sizing method used SA/DA SA/DA
19 Hasa stage/storage table been provided in the calculations? Yes Yes
20 Elevation of the excavated main pool depth (bottom of sediment 247.00 246.00
removal) (fmsl
21 1
Elevation of the main pool bottom (top of sediment removal) (fmsl)
248.00
247.00
221 Elevation of the bottom of the vegetated shelf (fmsl)
23. Elevation of the permanent pool fmsl — -
24 Elevation of_ a top of the vegetated shelf (fmsl)
25, Elevation of the temporaryool (fmsl) _
26Surface area of the main permanent pool (square feet)
27 Volume of the main permanent pool (cubic feet)
28 Avera a depth of the main pool (feed _ _ _ _
29 Avera a depth equation used
30 _ If using equation 3, main pool perimeter (feet)
31 If using equation 3, width of submerged veg. she (feet
251.50
251.00
252.00
251.50
252.50
252.00
253.84
T
253.26
8482
25722 of
3 ft
Equation 3
_458.0 ft_
10365
32946 of
3 !IF
Equation 2
__
3.0 ft
32 Volume of the forebay (cubic feed
33 Is this 15--20% of the volume in the main_ pool? _
34 Clean -out depth for foreba inches)
35 Design volume of SCM (cu ft)
5426 of
5070 of
Yes
Yes
48 In
54 in
28103 of
23193 cf
36 Is the outlet an orifice or a weir?
37 If orifice, orifice diameter (inches)
38 If weir, weir heightfinchesL
39 If weir, weir length inches _
40 Drawdown time for the temporary pool (days)
Orifice
Orifice
1.75 in
1.75 in
2.7
2.3
41 Are the inlet(s) and outlet located in a manner that avoids short-
circuiting
42 Are berms or baffles provided to improve the flowpath?
43 Depth of forebay at entrance inches) _ _ _ _..._
44 Depth of forebay_ate_(inches)
45 Does water flow out of the forebay in a non -erosive manner?
46 Width of the vegetated shelf (feet)
47' Slope of vegetated shelf H:V
Yes
Yes
No
No
60 in
66 in
54 in
60 in
Yes
Yes
1 6 ft
6 ft
6:1
6:1
48 Does the orifice drawdown from below the top surface of the
ermanentpool?
Yes
Yes
49
Does the pond minimize impacts to the receiving channel from the 1-
24-hr storm?
Yes
Yes
50
Are fountains proposed? (If Y, please provide documentation that
MD)�9 is met.
No
No
51 Is a trash rack or other device provided to protect the outlet system?
52 Are the dam and embankment planted in non -clumping turf grass?
53 Species of turf that will be used on the dam and embankment
54 Has a planting plan been provided for the vegetated_ shelf?
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
55lwet pond(s)
Yes
Yes
Yes
Yes
I Centipede
Centipede
Yes
Yes
Wet Pond 2 11:12 AM 11/29/2021