SW6131201_Supplement-EZ Form_20240625

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Rooms to Go Building and Parking Expansion
2 Project Area(ac) 136.04
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
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: I Susan Joplin,PE
28 Organization: The Site Group
29 Street address: 1111 Oberlin Rd.
30 City,State,Zip: Raleigh,NC 27605
31 Phone number(s): 919-757-1050
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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Seal Date

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? No
4 If so,number of low density drainage areas 0
Is all/part of this project subject to previous rule
5 versions? Yes
FORMS LOADED
DRAINAGE AREA INFORMATION I Entire Site 1 2
4 Type of SCM N/A Wet Pond Wet Pond
5 Total BUA from project(sq ft)
6 1995 rules
SL 2006-246 3695305 sf 1508835 sf 2194840 sf
2008 rules
2017 rules
New BUA on subdivided lots(subject to
7 permitting)(sq ft)
1995 rules
SL 2006-246 N/A N/A N/A
2008 rules
2017 rules
New BUA not on subdivided lots(subject to
8 permitting)(sf)
1995 rules
SL 2006-246 3695305 sf 1508835 sf 2194840 sf
2008 rules
2017 rules
9 Offsite-total area(sq ft)
1995 rules
SL 2006-246 N/A 49835 sf 6485 sf
2008 rules
2017 rules
10 Offsite BUA(sq ft)
1995 rules
SL 2006-246 N/A 49835 sf 6485 sf
2008 rules
2017 rules
11 Design storm(inches)
1995 rules
SL 2006-246 N/A 1 in 1 in
2008 rules
2017 rules
12 Breakdown of new BUA:
-Parking(sq ft) 1888539 sf 639006 sf 1257903 sf
-Sidewalk(sq ft) 16115 sf 5340 sf 10775 sf
-Roof(sq ft) 1790651 sf 864489 sf 926162 sf
-Roadway(sq ft)
-Future(sq ft)
-Other,please specify in the comment box below
(sq ft)
New infiltrating permeable pavement on subdivided'
13 lots(sq ft)
New infiltrating permeable pavement not on
14 subdivided lots(sq ft)
Existing BUA that will remain(not subject to
15 permitting)(sq ft)
16 Existing BUA that is already permitted(sq ft)
17 Existing BUA that will be removed(sq ft)
18 Percent BUA 62% 74% 86%
19 Design volume of SCM(cu ft) 120188 cf 174334 cf
20 Calculation method for design volume Simple Method Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional
21 information about the drainage area(s):

WET POND
1 Drainage area number 1 2 I
2 Minimum required treatment volume(cu ft) 120188 cf I 174334 cf
GENERAL MDC FROM 02H.1050
31 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 engineered No No
side slopes?
7 Are the inlets,outlets,and receiving stream protected from erosion Yes Yes
(10-year storm)?
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? _ Pump(preferred) Pump(preferred)
10 If 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 desi ned b an NC licensed rofessional? Yes Yes
WET POND MDC FROM 02H.1053
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 169.50 175.50
removal)(fmsl)
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 170.50 176.50
22 Elevation of the bottom of the vegetated shelf(fmsl) 176.40 180.50
23 Elevation of the permanent pool(fmsl) 177.00 181.00
24 Elevation of the top of the vegetated shelf(fmsl) 177.40 181.50
25 Elevation of the temporary pool(fmsl) 178.30 182.30
26 Surface area of the main permanent pool(square feet) 92584 112882
27 Volume of the main permanent pool(cubic feet) 501624 cf 428175 cf
28 Average depth of the main pool(feet) 5.42 ft 3.79 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) 95378 cf 92557 cf
33 Is this 15-20%of the volume in the main pool? No Yes
34 Clean-out depth for forebay(inches) 12 in 12 in
35 Design volume of SCM(cu ft) 156852 cf 192994 cf
36 Is the outlet an orifice or a weir? Orifice Orifice
37 If orifice,orifice diameter(inches) 6 in 6 in
38 If weir,weir height(inches)
39 If weir,weir length(inches)
40 Drawdown time for the temporary pool(days) 2.24 2.39
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) 42 in 54 in
44 Depth of forebay at exit(inches) 42 in 54 in _
45 Does water flow out of the forebay in a non-erosive manner? _ Yes Yes _
46 Width of the vegetated shelf(feet) _ 10 ft 10 ft _
47 Slope of vegetated shelf(H:V) _ 10:1 10:1
48 Does the orifice drawdown from below the top surface of the No No
permanent pool?
49 Does the pond minimize impacts to the receiving channel from the 1- Yes Yes
yr,24-hr storm?
Are fountains proposed?(If Y,please provide documentation that
50 No No
MDC(9)is met.)
51 Is a trash rack or other device provided to protect the outlet system? Yes Yes
52 Are 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 Centipede Grass Centipede Grass
54 Has a planting plan been provided for the vegetated shelf? Yes Yes
ADDITIONAL INFORMATION
55 Please use this space to provide any additional information about the
wet pond(s):
Wet Pond 3 4:47 PM 6/24/2024