SW6220202_Supplement-EZ Form_20230309

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
1 Project Name Messer Parcels
2 Project Area ac 12.25
3 Coastal Wetland Area ac 0
4 Surface Water Area ac 0
5 Is this project High or Low Density? High
6 1 Does this project use an off-site SCM? No
COMPLIANCE WITH 02H.1003(4)
7 Width of vegetated setbacks provided feet 30 ft
8 Will the ve etated 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 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
23 StormFilter
24 Silva Cell
25 Bayfilter
26 Filterra
FORMS LOADED
DESIGNER CERTIFICATION
27 Name and Title: Landon M.Lovelace,PE
28 Organization: Underfoot Engineering,inc.
29 Street address: 1149 Executive Circle,Suite C
30 City,State,Zip: Cary,NC 27511
31 Phone numbers: 919-576-9733
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
Q S
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Seal Date

DRAINAGE AREAS
1 Is this a high density project? Yes
2 If so,number of drainage areas/SCMs 1
3 Does this Droiect have low densit areas? No
4 If so,number of low density drainage areas 0
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site 1
4 Type of SCM Wet Pond Wet Pond
5 Total drainage area(sq ft 533635 sf 423247 sf
6 Onsite drainage area(sq ft 533635 sf 417370 sf
7 Offsite drainage area(sq ft N/A 5877 sf
8 Total BUA in project(sq ft 157110 sf 162987 sf
New BUA on subdivided lots(subject to
9permitting) s ft 88200 sf 88200 sf
New BUA not on subdivided lots(subject to
10permitting) sf 68910 sf 68910 sf
11 Offsite BUA(sq ft N/A 5877 sf
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft none none
-Sidewalk(sq ft 11042 sf 11042 sf
-Roof(sq ft none none
-Roadway s ft 57868 sf 57868 sf
-Future(sq ft none none
-Other,please specify in the comment box
below(sq ft
New infiltrating permeable pavement on
13 subdivided lots(sq ft none none
New infiltrating permeable pavement not on
14 subdivided lots(sq ft none none
Existing BUA that will remain(not subject to
15permitting) s ft none none
16 Existing BUA that is already permitted(sq ft none none
17 Existing BUA that will be removed(sq ft 6494 sf 6494 sf
18 Percent BUA 29% 39%
19 Design storm inches 1.0 in
20 Design volume of SCM cu ft 23088 cf
21 Calculation method for design volume Simple Method
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s):

WET POND
1 Drainage area number 1
21 Minimum required treatment volume cu ft 13631 cf
GENERAL 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 Yes
10- ear storm)?
8 Is there an overflow or bypass for inflow volume in excess of the Yes
desi n volume?
9 What is the method for dewatering the SCM for maintenance? Drawdown Orifice
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 Yes
General MDC 10?
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? 1 Yes
161 Does the SCM follow the device specific MDC? Yes
17 Was the SCM designed by an NC licensedprofessional? 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 260.50
removal)(fmsl
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 261.00
22 Elevation of the bottom of the vegetated shelf(fmsl) 266.00
231 Elevation of the permanent pool(fmsl) 266.50
24 Elevation of the top of the vegetated shelf(fmsl) 267.00
25 Elevation of the temporary pool(fmsl) 267.75
26 Surface area of the main permanent pool(square feet) 16886
27 Volume of the main permanent pool(cubic feet) 53262 cf
28 Average depth of the main pool(feet) 4.00 ft
29 Average depth equation used Equation 3
301 If using equation 3,main pool perimeter(feet) 542.0 ft
31 If using equation 3,width of submerged veg.shelf(feet) 3.0 ft
32 Volume of the forebay(cubic feet) 10119 cf
33 Is this 15-20%of the volume in the main pool? Yes
34 Clean-out depth for forebay(inches) 66 in
35 Design volume of SCM(cu ft) 23088 cf
36 Is the outlet an orifice or a weir? Orifice
371 If orifice,orifice diameter(inches) 2.0 in
38 If weir,weir height(inches)
39 If weir,weir length(inches)
40 Drawdown time for the temporary pool(days) 4.11
41 Are the inlet(s)and outlet located in a manner that avoids short- Yes
circuiting?
42 Are berms or baffles provided to improve the flow path? Yes
431 Depth of forebay at entrance(inches) 74 in
44 Depth of forebay at exit(inches) 72 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 Yes
permanentpool?
49 Does the pond minimize impacts to the receiving channel from the 1- Yes
r,24-hr storm?
50 Are fountains proposed?(If Y,please provide documentation that No
MDC 9 is met.
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 Bermuda
54 Hasa plantin Ian been provided for the vegetated shelf? Yes
ADDITIONAL INFORMATION
Please use this space to provide any additional information about
55 the wet pond(s):
Wet Pond 1 1:15 PM 3/9/2023