SW4240501_Supplement-EZ Form_20240819

SUPPLEMENT-EZ COVER PAGE
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PROJECT INFORMATION
1 Project Name Reserve at Old Hollow
2 Project Area(ac) 15.16
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 off-site SCM? • No
`COMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided(feet) 30
8 Will the vegetated setback remain vegetated? • Yes
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:
11 Infiltration System 0
12 Bioretention Cell 0
13 Wet Pond 2
14 Stormwater Wetland 0
15 Permeable Pavement 0
16 Sand 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 Dry Pond 0
23 StormFilter 0
24 Silva Cell 0
25 Bayfilter 0
26 Filterra 0
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: Norris Z.Clayton,PE,President
28 Organization: Hugh Creed Associates,Inc.,P.A. _
29 Street address: 1306 W.Wendover Ave.
30 City,State,Zip: Greensboro,NC 27408
31 Phone number(s): 336-906-3976 _
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.
Designer
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DRAINAGE AREAS
1 Is this a high density project? I 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 I
I FORMS LOADED ,
DRAINAGE AREA INFORMATION Entire Site 1 2
4 of SCM Wet Pond Wet Pond
5 Total drainage area(sq ft) 661911 180307 276834
6 Onsite drainage area(sq ft) 661911 180307 _276834
7 Offsite drainage area(sq ft) 0 0 0
8 Total BUA in project(sq ft) 249086 sf 93320 sf 162078 sf
New BUA on subdivided lots(subject to .
9 permitting)jsq ft) 123783 sf 46559 sf 77224 sf
'New BUA not on subdivided lots(subject to
r10 permitting)(sf) 125303 sf 40449 sf 84854 sf
11 Offsite BUA(sq ft) sf sf sf
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft) 44504 sf 15027 sf 29477 sf
-Sidewalk(sq ft) 11272 sf 3004 sf 82.68 sf
-Roof(sq ft) sf sf sf
._-Roadway(sq ft) 68082 sf --"-- 22418 sf 45664 sf
-Future(sq ft) sf _ sf sf
• -Other,please specify In the comment box
below(sq ft) 1445 sf sf 1445 sf
New infiltrating permeable pavement on
13 subdivided lots(sq_ftL sf sf sf
New infiltrating permeable pavement not on
14 subdivided lotsLsq ft) sf ___, sf sf
Existing BUA that will remain(not subject to
15 permitting)(sq ft) 15529 sf 6312 sf _ sf
16 Existing BUA that is already permitted(sq ft) sf sf sf_
17 Existing BUA that will be removed(sq ft) sf sf sf
18 Percent BUA 38% 50% 59%
19 'Design storm(inches) 1.0 in 1.0 in
20 Design volume of SCM(cu ft) 7328 cf _ 13307 cf
21 Calculation method for desi n volume Simple Simple
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
"Other"built-upon area from DA 2 is for gravel dnveway and pad for
-Sanitary Sewer Lift Station and CBU's.

WET POND
1 Drainage area number 1 2
2 Minimum required treatment volume(cu ft 7740 cf 1 13307 cf
MD_ C FROM 02H. 0
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:V)? 3:1 3:1
6 Does the SCM have retaining walls,gabion walls or other
No No
engineered side slopes?
7 Are the inlets,outlets,and receiving stream protected from erosion
(10-year storm)? Yes Yes
8 Is there an overflow or bypass for inflow volume in excess of the Yes Yes
design volume?
9 What is the method for dewatering the SCM for maintenance? Drawdown Orifice Drawdown Orifice
__ 10tIf 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 comply with General MDC(9)? Yes Yes
13 If the SCM is on a single family lot,does(will?)the plat comply with N/A N/A
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
WET POND MDC FROM 02H.1053
18lSizing method used SA/DA SA/DA
191 Has a stage/storage table been provided in the calculations? Yes Yes
20 Elevation of the excavated main pool depth(bottom of sediment
removal)Urns') i 955.00 935.00
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 1 956.00 936.00
22 Elevation of the bottom of the vegetated shelf(fmsl) 961.00 941.00
_ 23 Elevation of thepermanent pool(fmsl) 962.00 942.00
_ 24 Elevation of the top of the vegetated shelf(fmsl) 962.00 942.00
25 Elevation of the temporary pool(fmsl) 963.10 943.70
26 Surface area of the main permanent pool(square feet) 5386 5878
27 Volume of the main permanent pool(cubic feet) 17757 cf 18148 cf
28 Average depth of the main pool(feet) 3.30 ft 3.09 ft
29 Average depth equation used Equation 2 Equation 2
30 If using equation 3,main pool perimeter(feet)
31 If using equation 3,width of submerged veg.shelf(feet)
32 Volume of the forebay(cubic feet) 2725 cf _ 3119 cf
33 Is this 15-20%of the volume in the main pool? Yes Yes
34 Clean-out depth for forebay(inches) 36 in 36 in
Design volume of SCM(cu ft) _1 7972 cf _ 15244 cf __
36 Is the outlet an orifice or a weir? Orifice i Orifice
37 If orifice,orifice diameter(inches) 1.25 in 1.50 in
_38 If weir,weir held ht(inches)
39 If weir,weir length(inches, _
40 Drawdown time for the temporary pool(days) 3.6 3.6
41 Are the inlet(s)and outlet located in a manner that avoids short- Yes Yes
circuiting?
42 Are berms or baffles provided to improve the flow path? No No
43 Depth of forebay at entrance(inches) _ 36 in 36 in
44 Depth of forebay at exit(inches) 30 in 30 in
45 Does water flow out of the forebay in a non-erosive manner? Yes Yes
46l W idth of the vegetated shelf(feet) 6 ft 6 ft
4 S7 lope of vegetated shelf(H:V) 6:1 6:1
48 Does the orifice drawdown from below the top surface of the
I,ermanent pool? No
49 Does the pond minimize Impacts to the receiving channel from the 1-
yr.24-hr storm? Yes Yes
Are fountains proposed?(If Y,please provide documentation that No No
50 MDC(9)is met.)
51,Is a trash rack or other device provided to protect the outlet system? Yes Yes
52Are the dam and embankment planted in non-clumping turf grass? Yes Yes
53 Species of turf that will be used on the dam and embankment Hybrid Bermuda Hybrid Bermuda
54 Has a t;lanting plan been provided for the vegetated shelf? Yes Yes
ADDITIONAL INFORMATION ®�
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Please use this space to provide any additional information about
55 the wet pond(s):
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