SW6230601_Supplement-EZ Form_20231206

FORM510ADED
tOJECT INFORMATION
1 Project Name
inberly
2 Project Area fac) 48.47
3 Coastal Wetland Area ac
4 Surface Water Area ac 3.617
5 Is this project High or Low Density? High
6 Does this project use an off-site SCM? No
)MPLIANCE WITH 02H.4003(4)
7 Width of vegetated setbacks provided feet "'30
8 Will the ve etated setback remain ve etated? Yes
9 If BUA is proposed in the setback,does it meet NCAC 02H.1003 4 c-d? NIA
0 Is streambank stabilization proposed on this project? No
JMBERAND:TYPE OF.SCMs:
1 Infiltration System 0
2 Bioretention Cell 0
3 Wet Pond 1
4 Stormwater Wetland 0
5 Permeable Pavement ...0
6 Sand Filter 0
7 Rainwater Harvesting RWH 0
8 Green Roof 0
9 Level Spreader-Filter Stri (IS-FS 0
'0 Disconnected Impervious Surface(DIS) ...0
1 Treatment Swale 0
2 Dry Pond 0
3 StormFilter 0'
.4 Silva Cell 0`
5 13a i[ter 0
'6 Filterra
FORMS LOADED
:SIGNER CE RTIFI CATION.
'7 Name and Title: Carlo Pardo,PE '
.8 Organization: Bowman North Carolina.Ltd.
'9 Street address: 4006 Barrett Drive,Suite 104
'0 Ci ,State,Zip: Raleigh,NC 27609
1 Phone number(s): 919-553-6570
,2 Email: cpardo@bowman:com
Certificafion Statement
I c e rt ifyj under penalty o. law that this Supplement-EZ fours and all supporting information were prepared under my direction or supervision that the ,..
information provided m the farm is to the best of my knowledge and belief true accurate and complete and;tllatthe engineering plans
specifications operation andmnaintenance agreeri tints and other supporting information are consistent with,the information provided here
Designer
SEAL Sign. re of Designer
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I Is this a high density project? Yes
2 If so,number of drainage areaslSCMs -`.1
3 Does this project have low density areas? No
1 If so,number of low density drainage areas 0
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
2AINAGE AREA INFORMATION Entire'Site 1
1 Type of SCM Wet Pond
3 Total drainage area(sq ft 2111526 sf 1336945
3 Onsite drainage area(sq ft >2111526 sf 1312309
7 Offsite drainage area(sq ft 24636
3 Total BUA in project(sq ft 371274 sf 395910 sf
New BUA on subdivided lots(subject to permitting)
3 (sg ft 220000 sf 220000 sf
New BUA not on subdivided lots(subject to
permitting) s 151274 sf .175910 sf
1 Offsite BUA s ft 24636 sf
2 Breakdown of new BUA not on subdivided lots:
Parking(sq ft
Sidewalk(sq ft 14847 sf 14847 sf
Roof(sq ft
Roadway s ft 89295 sf 89295 sf
Future(sq ft 47132 sf 47132 sf
-Other,please specify in the comment box
below(sq ft
New infiltrating permeable pavement on
3 subdivided lots s ft
New infiltrating permeable pavement not on
1 subdivided lots(sq ft
Existing BUA that will remain(not subject to
5permitting) s ft
3 Existing BUA that is alreadpermitted-.(s�g..fq.
7 Existing BUA that will be removed(sq ft
3 Percent BUA 17.58% 29.6%
3 Desi n storm inches 1.0 in
3 Design volume of SCM cu ft 100598 of
1 Calcula€ion method for design volume Simple.Method
)DITIONAL`1NFORMATION
Please use this space to provide any additional information about the
2 drainage areas):
e'Future'BUA is 80%of the 58,915 sf lot next to Lot#1:The"off-site BUA
24.636 sf of NCDOT ROW in the drainage area.that was'assu med.100%
pervious for the wet pond design.The impervious area forthe mail kiosk
ross from Lot#53 is accounted for in`Roadway'.'

r V ■ r \i I r V
1 Drainage area number 1
2 Minimum re wired treatment volume cu ft 35264 of
NERAL MDC FROM 02H.1050
3 Is the SCM sized to treat the SW from all surfaces at build-out? Yes
4 Is the SCM located away from contaminated soils? Yes
5 What are the side slopes of the SCM H:V? 3:1
6 Does the SCM have retaining walls,gabion walls or other engineered No
side slopes_?
7 Are the inlets,outlets,and receiving stream protected from erosion Yes
10- ear storm)?
a Is there an overflow or bypass for inflow volume in excess of the Yes
design volume?
9 What is the method for dewatering the SCM for maintenance? Pump referred
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? Yes
13 If the SCM is on a single family lot,does(will?)the plat comply with N/A
General MDC 10?
14 Is there an O&M Agreement that complies with General MDC(11)? Yes
151 Is there an O&M Plan that complies with General MDC 12? Yes
16 Does the SCM follow the devices edfc;MDC? Yes
17 Was the SCM desi ned b an NC Licensed rofessional? Yes
T POND MDC FROM 02H.1053
18 Sizing method used SAIDA
19 Has a sta etstora a table been 2rovided in the calculations? Yes
20 Elevation of the excavated main pool depth(bottom of sediment 361.00
removal)(fmsl
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 362.00
22 Elevation of the bottom of the ve etated shelf fmsl 366.50
23 Elevation of the permanent pool fmsl 367.00
24 Elevation of the top of the vegetated shelf fmsl 367.50
25 Elevation of the tem orspool fmsl 369,80
26 Surface area of the main permanent eool(square feet) 22010
27 Volume of the main permanent pool cubic feet 86865 of
28 Averse depth of the main pool feet 4.33 ft
29 Averse depth equation used j Equation 3
30 If using equation 3,main pool perimeter feet 700.0 ft
31 if usin2 equation 3,width of submerged veg.shelf feet &0 ft
32 Volume of the foreba cubic feel 14800 c€
33 Is this 15.20%of the volume in the main ool? Yes
34 Clean-out depth for foreba inches 30 in
35 Design volume of SCM(cu ft) 100598 cf
36 Is the outlet an orifice or a weir? Orifice
37 If orifice,orifice diameter(inches) 4.00 in
38 If weir,weir height(inches)
39 if weir,weir length inches
40 Drawdown time for the temporary poet(days) 4.39
41 Are the inlet(s)and outlet located in a manner that avoids short- Yes
circuiting?
42 Are berms or baffles provided to improve the flow path? Yes
43 Depth of forebay at entrance(inches) 36 in
44 Depth of rebay at exit(inches) 30 in
45 Does water flow out of the forebay in a non-erosive manner? Yes
46 Width of the vegetated shelf(feet) 6 ft
47 Slope of vegetated shelf(H:V) 6:1
48 Does the orifice drawdown from below the top surface of the Yes
permanentpool?.
49 Does the pond minimize impacts to the receiving channel from the 1- Yes
r,24-hr storm?
50 Are fountains proposed?(if Y,please provide documentation that No
MDC 9 is met.
51 Is a trash rack or other device provided to protect the outlet system? Yes
52 Are the dam and embankment planted in non-clumping turf grass? Yes
53 Species of turf that will be used on the dam and embankment Hybrid Bermuda
54 Hasa planting plan been provided for the vegetated shelf? Yes
IDITIONAL INFORMATION
55 Please use this space to provide any additional information about the
wet pond(s):