HomeMy WebLinkAboutSW6211201_Supplement-EZ Form_20211210SUPPLEMENT-EZ COVER PAGE
LOAD SUPPLEMENT FORMS
PROJECT INFORMATION SOL
1 lProiectName
Project Area (ac)
Coastal Wetland Area (ac)
Surface Water Area (ac)
Is this project High or Low Density?
Does this protect use an off -site SCM?
The Glen
11.18
0
0.4
No
COMPLIANCE WITH 02H .1003(4)
7
Width of vegetated setbacks provided feet
30 feet
8
Will the vegetated setback remain vegetated?
N/A
9
If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ?
N/A
10
1 Is streambank stabilization proposed on this project?
No
NUMBER AND TYPE OF SCMs:
11
Infiltration S stem
12
Bioretention Cell
13
Wet Pond
1
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
StormFilter
Silva Cell
113ayfilter
IFilterra
23
24
25
26
LOAD SUPPLEMENT FORMS
DESIGNER CERTIFICATION
27 IName and Title:
Street address:
City, State, Zip:
Phone number(
Email:
Andrew S Pettv. VP
Curry Engineering Group, PLLC
205 South Fuquay Avenue
Fuquay-Varina, NC
919-552-0849
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.
04
EVIL
36823
-
fffl�llllLlthX���
Seal
2021.10.22 09.19.54 -
04'00'
Date
DRAINAGE AREAS
1
Is this a high density project?
Yes
2
If so, number of drainage areas/SCMs
1
3
Does this roiect have low densit areas?
No
4
F5
If so, number of low densitydrainage areas
0
Is all/part of this project subject to previous rule
versions?
No
FORMS LOADED
DRAINAGE AREA INFORMATION
Entire Site
1
4
T pe of SCM
N/A
Wet Pond
5
Total drainage area (sq ft
487000.8
328007
6
Onsite drainage area (sq ft
487000.8
328007
7
Offsite drainage area (sq ft
-
8
Total BUA in project (sq ft)
121704 sf
121704 sf
9permitting)
New BUA on subdivided lots (subject to
s ft
82500 sf
82500 sf
10permitting)
New BUA not on subdivided lots (subject to
s
39204 sf
39204 sf
11
Offsite BUA (sq ft
-
12
Breakdown of new BUA not on subdivided lots:
-
-
- Parking (sq ft
-
34848 sf
- Sidewalk (sq ft
-
4356 sf
- Roof (sq ft
-
-
- Roadway s ft
-
-
- Future (sq ft
-
-
- Other, please specify in the comment box
below (sq ft)
-
sf
13
New infiltrating permeable pavement on
subdivided lots (sq ft
-
14
New infiltrating permeable pavement not on
subdivided lots (sq ft)
-
15permitting)
Existing BUA that will remain (not subject to
s ft
-
-
16
1 Existina BUA that is already permitted (sq ft
-
-
17
Existing BUA that will be removed (sq ft
-
-
18
Percent BUA
25%
37 0
19
Design storm inches
1.0 in
20
IDesign volume of SCM cu ft
13144 cf
21
lCalculation method for design volume
Simple
ADDITIONAL INFORMATION
Please use this space to provide any additional information about
22 drainage area(s):
WET POND
Drainage area number
ERAL 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 side slopes?
No
7
Are the inlets, outlets, and receiving stream protected from erosion
(10-year storm)?
Yes
8
Is there an overflow or bypass for inflow volume in excess of the
desi n volume?
Yes
9
What is the method for dewatering the SCM for maintenance?
Pump (preferred)
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
General MDC 10 ?
N/A
14
Is there an O&M Agreement that complies with General MDC (11)?
Yes
15
Is there an O&M Plan that complies with General MDC (12)?
Yes
161
Does the SCM follow the device specific MDC?
Yes
17
Was the SCM designed by an NC licensed rofessional?
Yes
WET POND
MDC FROM 02H .1053
18
Sizing method used
SA/DA
19
Has a stage/storage table been provided in the calculations?
Yes
20
Elevation of the excavated main pool depth (bottom of sediment
removal) (fmsl
71.50
21
Elevation of the main pool bottom (top of sediment removal) (fmsl)
72.00
221
Elevation of the bottom of the vegetated shelf (fmsl)
77.00
23
Elevation of the permanent pool (fmsl)
77.50
24
Elevation of the top of the vegetated shelf (fmsl)
78.00
25
Elevation of the temporary pool (fmsl)
78.50
26
Surface area of the main permanent pool (square feet)
7792
27
Volume of the main permanent pool (cubic feet)
26681 cf
28
Average depth of the main pool (feet)
4.04 It
29
Average depth equation used
Equation 3
30
If using equation 3, main pool perimeter (feet)
406.0 It
31
If using equation 3, width of submerged veg. shelf (feet)
3.0 ft
32
Volume of the forebay (cubic feet)
6589 cf
33
Is this 15-20% of the volume in the main pool?
Yes
34
Clean -out depth for forebay (inches)
30 in
35
Design volume of SCM (cu ft)
13144 cf
36
Is the outlet an orifice or a weir?
Orifice
37
If orifice, orifice diameter (inches)
2 in
38
Ifweir, weir height (inches)
39
Ifweir, weir length (inches)
40
Drawdown time for the temporary pool (days)
2.51
41
Are the inlet(s) and outlet located in a manner that avoids short-
circuiting?
Yes
42
Are berms or baffles provided to improve the flow path?
Yes
43
Depth of forebay at entrance (inches)
36 in
44
Depth of forebay at exit (inches)
18 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
permanentpool?
Yes
49
Does the pond minimize impacts to the receiving channel from the 1-
r, 24-hr storm?
Yes
50
Are fountains proposed? (If Y, please provide documentation that
MDC 9 is met.
No
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
Centipede
54
Hasa planting plan been provided for the vegetated shelf?
Yes
ADDITIONAL
INFORMATION
55
Please use this space to provide any additional information about
the wet pond(s):
Wet Pond 3 9:13 AM 10/22/2021