SW4231202_Supplement-EZ Form_20231229

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name The Townes at Bermuda Run-Phase 1
2 Project Area(ac) 21.99
3 Coastal Wetland Area(ac) 0
4 Surface Water Area(ac) 1.53
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
12 Bioretention Cell
13 Wet Pond 2
14 Stormwater Wetland
15 Permeable Pavement
16 Sand Filter
17 Rainwater Harvesting(RWH)
18 Green Roof
19 Level Spreader-Filter Strip(LS-FS)
20 Disconnected Impervious Surface(DIS)
21 Treatment Swale
22 Dry Pond
23 StormFilter
24 Silva Cell
25 Bayfilter
26 Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: Clark A.Fleming,P.E.
28 Organization: Evans Engineering,Inc.
29 Street address: 4609 Dundas Drive
30 City,State,Zip: Greensboro,NC 27407
31 Phone number(s): 336-854-8877
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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•'Q. SE/IL _ Signature of Designer
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DRAINAGE AREAS
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? Yes
4 If so,number of low density drainage areas 1
Is all/part of this project subject to previous rule
5 versions? No
FORMS WADED
DRAINAGE AREA INFORMATION 1 2 LD 9 I
4 T •e of SCM 1111111111111.1 Wet Pond#1 i Wet Pond#2 None
5 Total draina•e area s• ft 545 634 ( 219,121 " 275,685 50,828
6 Onsite drainage area s• ft 542,217 218,289 273,100 50,828
7 Offsite draina•e area s• ft 3 421 832 2,589 '` N/A
8 Total BUA in •ro'ect s•ft 270911 sf { 122617 sf 139136 sf ( 9158 sf
New BUA on subdivided lots(subject to permitting)
9 s•ft 159590 sf 71198 sf 88392 sf N/A
New BUA not on subdivided lots(subject to
110 •ermittin• s 111321 sf _ 51419 sf 50744 sf 9158 sf
11 Offsite BUA s•ft N/A } N/A I N/A N/A
®Breakdown of new BUA not on subdivided lots:
1111 -Parkin• s•ft 6605 sf 3330 sf !® N/A
- -Sidewalk s•ft 15572 sf 7238 sf 6462 sf 1872 sf
1111 -Roof s•ft 159590 sf 71198 sf 88392 sf N/A
-Roadwa s• ft 89144 sf j 40851 sf 41007 sf 7286 sf
IIIIINESEIREIIIIIIIIIIIIIIIIIIIMIIIIIIIN/A I N/A N/A N/A
Other,please specify in the comment box
below s• ft N/A N/A [ N/A N/A
IIINew infiltrating permeable pavement on
subdivided lots s•ft N/A N/A N/A N/A
New infiltrating permeable pavement not onIII
C i
subdivided lots s•ft N/A N/A N/A N/A
®Existing BUA that will remain(not subject to
•ermittin• s•ft N/A N/A N/A N/A
16 Existin• BUA that is alread •ermitted s• ft N/A N/A p N/A N/A
®Existin• BUA that will be removed s• ft N/A N/A N/A N/A
18 Percent BUA 50% 56% 50% ' 18%
19 Desi•n storm inches N/A 1.0 in 1.0 in N/A
20 Desi.n volume of SCM cu ft N/A 10136 cf 4mv 11696 cf N/A
®Calculation method for design volume N/A Simple Method Simple Method N/A
ADDITIONAL INFORMATION
IIIPlease use this space to provide any additional information about the
drainage area(s):

WET POND
'1 Drainage area number 1 2
2 Minimum required treatment volume Scu ft)
i`L 11..h -IL.%, t.:i 'I.ii
3 Is the SCM sized to treat the SW from all surfaces at
build-out?4 Is the SCM located away from contaminated soils? 1111.011111111 Yes
©What are the side slopes of the SCM(H: ? 3:1 3:1
Does the SCM have retaining walls,gabion walls or other engineered1111
No No
side slosea?
IIEAre the inlets,outlets,and receiving stream protected from erosion Yes
(10-year storm?
Ell Isthere an overflow or bypass for inflow volume in excess of the No No
deli.n volume?
9 What is the method for dewatering the SCM for maintenance? Pum. .referred Pum. .referred
10 If applicable,will the SCM be cleaned out after construction?
MEI Does the maintenance access comply with General MDC(8)? M.11.
®Does the drainage easement comply with General MDC(9)? 11.111011111111
®If the SCM is on a single family lot,does(will?)the plat comply with N/A N/A
General MDC(10)?
•Is there an O&M Agreement that complies with General MDC(11)? Yes
®Is there an O&M Plan that complies with General MDC(12)? Yes
16 Does the SCM follow the device specific MDC?
Nip Was the SCM desi.ned b an NC licensed .rofessional?
18 Sizing method used SA/DA� SA/DA
19 Has a stage/storage table been provided in the calculations? Yes Yes
20 Elevation of the excavated main pool depth(bottom of sediment 739.00 722.00
removal fmsl)
®Elevation of the main pool bottom(top of sediment removal)(fmsl) 739.50 I 722.50
®Elevation of the bottom of the vegetated shelf(fmsl) 744.50 726.50
®Elevation of the permanent pool(fmsl) 745.00 727.00
24 Elevation of the top of the vegetated shelf(fmsl) 745.50 727.50
®Elevation of the temporary pool(fmsl) 747.50 730.00
26 Surface area of the main permanent pool(square feet) 6,197 SF 5,781 SF
NM Volume of the main permanent pool(cubic feet) 21051 cf 16803 cf
28 Average depth of the main pool(feet) 3.80 ft 3.27 ft
29 Average depth equation used E. .f. Equation 3
30 If using equation 3,main pool perimeter(feet 242.0 ft 240.0 ft
® If using equation 3,width of submerged veg.shelf(feet) 3.0 ft 3.0 ft
®Volume of the forebay(cubic feet) 3693 cf 2640 cf
®Is this 15-20%of the volume in the main pool? Yes
34 Clean-out depth for forebay(inches) 36 in
®Design volume of SCM(cu ft) 10136 cf 11696 cf
36 Is the outlet an orifice or a weir? Orifice Orifice
Egg If orifice,orifice diameter(inches) 2 in '=C'
38 If weir,weir height(inches) N/A N/A
39 If weir,weir length(inches) N/A N/A
Drawdown time for the temporary pool(days) 3.43 �'�
Are the inlet(s)and outlet located in a manner that avoids short- i
circuiting? Yes Yes
42 Are berms or baffles provided to improve the flow.ath? Yes Yes
43 Depth of forebay at entrance(inches) 48 in 48 in
44 Depth of forebay at exit inches) 36 in 36 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:V) 6:1 6:1
Does the orifice drawdown from below the top surface of the No No
.ermanent pool?
Does the pond minimize impacts to the receiving channel from the 1- Yes Yes
E
yr,24-hr storm?
Are fountains proposed?(If Y,please provide documentation that
50 MDC(9)is met.) No No
®Is a trash rack or other device provided to protect the outlet system? Yes Yes
MEAre the dam and embankment planted in non-clumping turf grass? Yes Yes
Species of turf that will be used on the dam and embankment Fescue 11111=maM
Hasa.Iantin. .Ian been .rovided for the vegetated shelf? Yes
ADDITIONAL INFORMATION
®Please use( this space to provide any additional information about the
pond(s):
and s)
Wet Pond 1 1:59 PM 12/5/2023