SW6131201_Supplement-EZ Form_20240229

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION I
1 Project Name i Rooms to Go Building and Parking Expansion
2 Project Area(ac) rz~_ 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 I Infiltration System
12 Bioretention Cell
13 Wet Pond 2
14 Stormwater Wetland
15 Permeable Pavement
16 Sand Filter
17 Rainwater HarvestingjRWH)
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 t
27 Name and Title: Ed Sconfienza PE,Senior Engineer
28 Organization: The Site Group
29 Street address: 1111 Oberlin Rd.
30 City,State,Zip: ( Raleigh,NC 27605
31 IPhone number(s): 919-835-4787x236 —t
32 jEmail: eda@}thesitegroup.net
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
„ ` R� °" End F a e�. g f3 � 6�
2- L9
��
ry xp Signature of Designer
•
•
- ' . \ZA 's Z / z -z/ &Ca Z /
��' ' Sea! Date

DRAINAGE AREAS
1 Is this a high density project? Yes
2 I If so,number of drainage areas/SCMs 2
3 Does this project have low density areas? No
4 I If so,number of low density drainage areas 0
l Is all/part of this project subject to previous rule
5 (versions? Yes
FORMS LOADED
DRAINAGE AREA INFORMATION _.17 "`4. 1 2 1
4 Type of SCM Nth
5 Total BUA from project(sq ft) 1521301 sf 2197863 sf
6 1995 rules
—I SL 2006-246
2008 rules 1222752 sf 1902834 sf
2017 rules 298549 sf 295029 sf
New BUA on subdivided lots(subject to
7 permitting)(sq ft)
1995 rules ( 1
SL 2006-246
2008 rules
I 2017 rules
New BUA not on subdivided lots(subject to
8 permitting)(sf)
1995 rules I {
SL 2006-246
2008 rules _
2017 rules 298529 sf 1 295029 sf
9 Offsite-total area(sq ft) 1
I 1995 rules
SL 2006-246 ! # !
2008 rules 49684 sf 5306
2017 rules
10 Offsite BUA(sq ft)
1995 rules
SL 2006-246
2008 rules — 4032 sf I 3901 sf 4�
2017 rules
11 Design storm(inches)
1995 rules
SL 2006-246
2008 rules 1 in I 1 in
2017 rules 1 in 1 in i
12 Breakdown of new BUA: _
-Parking(sq ft) 132493 sf 1 124674 sf
-Sidewalk(sq ft) _
-Roof(sq ft) 166056 sf----r 170355 sf
-Roadway(sq ft) ! j
-Future(sq ft) i
-Other,please specify in the comment box below
(sq ft)
New infiltrating permeable pavement on subdivided
13 lots(sq ft) 1 _
New infiltrating permeable pavement not on
14 subdivided lots(sq ft) i p
Existing BUA that will remain(not subject to
15 permitting)(sq ft) 1222752 sf 1902834 sf
16 Existing BUA that is already permitted(sq ft) 1 1222752 sf 1902834 sf
17 Existing BUA that will be removed(sq ft)
18 Percent BUA 25% { 37%
019 Design volume of SCM(cu ft) 120188 cf ( 174334 cf
20 Calculation method for design volume ; SA/DA SA/DA
AD } ONAL INFORMATION
Please use this space to provide any additional
21 information about the drainage area(s):

WET POND
1 iDrainage area number 1 1 I 2
2 Minimum required treatment volume(cu ft) 120188 cf 174334 cf
NERAL MOO FROM 02H.1050
3 Is the SCM sized to treat the SW from all surfaces at build-out? Yes
imp Is the SCM located away from contaminated soils? l Yes Yes
gni 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 r
side slopes? V No No
7 Are the inlets,outlets,and receiving stream protected from erosion
(10-year Storm)? ` Yes Yes
Is there an overflow or bypass for inflow volume in excess of the
8 desi.n volume? Yes Yes
9 What is the method for dewaterin.the SCM for maintenance? Pump(preferred) ; Pum. •referred)
1.13 If applicable,will the SCM be cleaned out after construction? Yes Yes
1111 Does the maintenance access comply with General MDC(8)? Yes Yes
Does the drainage easement comply with General MDC(9)? Yes Yes
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 FOND MDC FROMb2F1.Yfl53. ..,
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 169.50 176.50
removal)(fmsl)
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 173.50 177.50
mg Elevation of the bottom of the vegetated shelf(fmsi) 176.50 180.50
MEI Elevation of the permanent pool(fmsi) 177.00 181.00
24 Elevation of the top of the vegetated shelf(fmsi) 177.50 181.50 I
i ®Elevation of the temporary pool(fmsi) 178.30 182.30
I 26 Surface area of the main permanent pool(square feet) 92584 112882
27 Volume of the main permanent pool(cubic feet) 292708 cf 341941 of
28 Average depth of the main pool(feet) 3.16 ft 3 03 ft
29lAverage 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) 61175 cf 53307 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) I 165259 cf 203431 cf
36 Is the outlet an orifice or a weir? Weir Weir
37 If orifice,orifice diameter(inches) I
38 If weir,weir height(inches) 16 in 16 in
39 If weir,weir length(inches) 18 in 20 in ~m
40 Drawdown time for the temporary pool(days) 0.78 0.86 4w4
Are the inlet(s)and outlet located in a manner that avoids short- I
41 circuiting? Yes Yes
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
Does the orifice drawdown from below the top surface of the
48 permanent pool? No No
Does the pond minimize impacts to the receiving channel from the 1-
49 yr 24-hr storm? Yes Yes
Are fountains proposed?(If Y,please provide documentation that
50 MDC(9)is met_) No No
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
54i Has a planting flan been rovided for the vegetated shelf? Yes Yes
ADDITIONAL INFORMATION
j Please use this space to provide any additional information about theme
55_ !wet pond(s):
Wet Pond 3 9:43 AM 2/22/2024