SW3230605_Supplement-EZ Form_20230627

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Rogers Pond
2 Project Area(ac) 60.01
3 Coastal Wetland Area(ac) 0
4 Surface Water Area(ac) 1.56
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)
8 Will the vegetated setback remain vegetated?
9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)?
10 Is streambank stabilization proposed on this project?
NUMBER AND TYPE OF SCMs:
11 Infiltration System
12 Bioretention Cell
13 Wet Pond 2
14 Stormwater Wetland
15 Permeable Pavement
16 Sand Filter 1
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: Blake H.Estridge,PE/Project Engineer
28 Organization: American Engineering Associates-Southeast,PA
29 Street address: 8008 Corporate Center Dr,Suite 110
30 City,State,Zip: Charlotte,NC 28226
31 Phone number(s): 704-375-2438
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

WET POND
1 Drainage area number 1 2 2 Minimum required treatment volume(Cu ft) 26564 cf I 22268 cf I
GENERAL MDC FROM 02H.1050
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 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
If the SCM is on a single family lot,does(will?)the plat comply with
13 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
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 626.50 588.50
removal)(fmsl)
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 627.00 589.00
22 Elevation of the bottom of the vegetated shelf(fmsl) 632.00 594.00
23 Elevation of the permanent pool(fmsl) 632.50 594.50
24 Elevation of the top of the vegetated shelf(fmsl) 633.00 595.00
25 Elevation of the temporary pool(fmsl) 633.53 595.99
26 Surface area of the main permanent pool(square feet) 18499 9877
27 Volume of the main permanent pool(cubic feet) 79054 cf 34952 cf
28 Average depth of the main pool(feet) 4.27 ft I 3.54 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) 13028 cf 6450 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
35 Design volume of SCM(cu ft) 28323 cf 22345 cf
36 Is the outlet an orifice or a weir? Orifice Orifice
37 If orifice,orifice diameter(inches) 2.5 2 in
38 If weir,weir height(inches)
39 If weir,weir length(inches)
40 Drawdown time for the temporary pool(days) 2.6 2.8
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? Yes �I_ Yes
43 Depth of forebay at entrance(inches) 72 in I_ 72 in
44 Depth of forebay at exit(inches) 18 in I 18 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
48 Does the orifice drawdown from below the top surface of the Yes Yes
permanent pool?
49 Does the pond minimize impacts to the receiving channel from the 1- Yes Yes
yr,24-hr storm? _
50 Are fountains proposed?(If Y,please provide documentation that No No
MDC(9)is met.)
51 Is a trash rack or other device provided to protect the outlet system? No 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 Bermuda Sod Bermuda Sod
54 Has a planting plan been provided for the vegetated shelf? Yes Yes
ADDITIONAL INFORMATION
Please use this space to provide any additional information about
55 the wet pond(s):
Wet Pond 1 4:21 PM 3/23/2023

SAND FILTER
1 Drainage area number 3
2 Minimum required treatment volume(cull) 6361 sf
GENERAL MDC FROM 02H.1050
3 Is the SCM sized to treat the SW from all surfaces at build-out? I Yes
4 Is the SCM located away from contaminated soils? Yes
5 What are the side slopes of the SCM(H:V)? 3:1
Does the SCM have retaining walls,gabion walls or other
6 engineered side slopes? No
Are the inlets,outlets,and receiving stream protected from erosion
7(10-year storm)? Yes
8 Is there an overflow or bypass for inflow volume in excess of the Yes
design volume?
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
If the SCM is on a single family lot,does(will?)the plat comply with
13 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
16 Does the SCM follow the device specific MDC? Yes
17 Was the SCM designed by an NC licensed professional? Yes
SAND FILTER MDC FROM 02H.1056
18 SHWT elevation(fmsl)
19 Type of sand filter(open or closed) Open
20 If closed,will the filter will be pre-cast or pour-in-place?
21 If closed,top of grate elevation(fmsl)
22 Is this sand filter designed to attenuate peak flows? Yes
Sediment Chamber
23 Volume that can be retained in the sediment chamber(cubic feet) 6730 cf
24 Will there be a permanent pool in the sediment chamber? No
25 Bottom of the sediment chamber(fmsl) 593.00
26 Area of the sediment chamber(square feet) 1346 sf
27 Physical depth of the sediment chamber(inches) 12 in
28 Ponding depth in the sediment chamber,above any permanent 60 in
pool(inches)
29 Elevation of top of weir between chambers(fmsl) 594
Sand Chamber
30 Volume that can be retained in the sand chamber(cubic feet) 3500 cf
31 Bottom of the sand chamber(fmsl) 590.50
32 Area of the sand chamber(square feet) 700 sf
33 Physical depth of the sand chamber(inches) 30 in
34 Ponding depth in the sand chamber,above the sand surface 60 in
(inches)
35 Elevation of the bypass device(fmsl) 594
36 Type of bypass device Riser with weir
37 Mechanism for distributing flow over the sand surface
38 Sand specification for sand chamber ASTM C-33
39 Depth above underdrain pipe(inches) 24 in
40 Will the media be maintained to drain at least two inches per hour at yes
the sand surface?
41 Is at least one clean-out pipe provided at the low point of each Yes
underdrain line?
42 Will clean-out pipes be capped? Yes
ADDITIONAL INFORMATION
Please use this space to provide any additional information about
43 the sand filter(s):
Sand Filter 1 4:28 PM 3/23/2023

DRAINAGE AREAS
r5
1 Is this a high density project? Yes
2 If so,number of drainage areas/SCMs _ 3
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
versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site 1 2 3
4 Type of SCM Wet Pond Wet Pond Sand Filter
5 Total drainage area(sq ft) 1813839 957449 616374 240016
6 Onsite drainage area(sq ft) 1592030 751244 615146 225640
7 Offsite drainage area(sq ft) 221809 206205 1228 14376
8 Total BUA in project(sq ft) 663473 sf 301331 sf 262527 sf 99615 sf
New BUA on subdivided lots(subject to
9 permitting)(sq ft) 397944 sf 177288 sf 149612 sf 71044 sf
New BUA not on subdivided lots(subject to
10 permitting)(sf) sf
11 Offsite BUA(sq ft) 24557 sf 24557 sf sf sf
12 Breakdown of new BUA not on subdivided lots: 0
-Parking(sq ft) sf
-Sidewalk(sq ft) 62273 sf 25982 sf 29047 sf 7244 sf
-Roof(sq ft) sf
-Roadway(sq ft) 164878 sf 67240 sf 78528 sf 19110 sf
-Future(sq ft)
-Other,please specify in the comment box
below(sq ft) 6264 sf 5340 sf 2217 sf
New infiltrating permeable pavement on
13 subdivided 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 37% 32% 43% 42%
19 Design storm(inches) 1.0 in 1.0 in 1.0 in
20 Design volume of SCM(cu ft) 28323 cf 22345 cf 6941 cf
21 Calculation method for design volume Simple Method Simple Method I Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):
Other BUA includes driveway areas inside of public road right-of-way