SW4240907_Supplement-EZ Form_20241015

SUPPLEMENT-EZ COVER PAGE
LOAD SUPPLEMENT FORMS
PROJECT INFORMATION
1 Project Name Design Masters Building Expansion
2 Project Area(ac) 17.05
3 Coastal Wetland Area(ac) I^ 0 - -4 Surface Water Area(ac) 0.23
5 Is this project High or Low Density? Both High and Low Density
6 Does this project use an off-site SCM? i No
COMPLIANCE WITH 02H.1003(4)
7 !Width of vegetated setbacks provided(feet) 50- - .
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 _ - 0 .— --
12 Bioretention Cell - _ _ . _ 0 - - - _
13 Wet Pond c _- 1 - -14 Stormwater Wetland 0 -
15 Permeable Pavement _ _ 0 -
16 Sand Filter _ _ 0
17 Rainwater Harvesting(RWH) • - _ _ 0
18 Green Roof 0
19 Level Spreader-Filter Strip(LS-FS) 4 _ _—- 0
20 Disconnected Impervious Surface(DIS) _ _ - -- 0
21 Treatment Swale 0
22 Dry Pond - — - - 0
23 StormFilter 0
24 Silva Cell 0
25 Bayfilter _ 0 26 Fllterra 0
LOAD SUPPLEMENT FORMS I
DESIGNER CERTIFICATION _
27 Name and Title: - _- Andrew Christ.PE
28 Organization: - FEI Civil Engineers and Land Surveyors
29 Street address 8518 Triad Drive _
30 City,State.Zip: - Colfax,NC 27235 _
31 Phone number(s): _ - 336-544-6438
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
\`0I 1111/01
7,7 Signature of Designer
•4. SEAL r•
•
053870
C \\ S:---Arfry
�l�U 1111 Date

DRAINAGE AREAS
1 Is this a high density project? r Yes
2 If so. number of drainage areas/SCMs 1
3 Does this project have low density areas? Yes
4 If so,number of low density drainage areas 1
Is all/part of this project subject to previous rule
5 versions? No
FORMS LOADED
DRAINAGE AREA INFORMATION Entire Site ' 1 LD 1
4 Type of SCM LD and Wet Pond Wet Pond Low Density__
5 Total drainage area(sq ft) 815,683 173.718 641,965
6 Onsite drainage area(sq ft) 815.683 173,718 641 965
7 Offsite drainage area(sq ft) 0 0 0
8 Total BUA in project(sq ft) 206608 sf 137647 sf _ 68961 sf
New BUA on subdivided lots(subject to permitting)
9 (sq ft) n/a n/a n/a
New BUA not on subdivided lots(subject to
10 permitting)(sf) 96576 sf 96576 sf n/a
11 Offsite BUA(sq ft) n/a n/a n/a
12 Breakdown of new BUA not on subdivided lots:
-Parking(sq ft) 74576 sf 74576 sf n/a
-Sidewalk(sq ft) n/a n/a n/a
-Roof(sq ft) 22000 sf 22000 sf n/a
I -Roadway(sq ft) n/a n/a n/a
1 -Future(sq ft) n/a n/a n/a
-Other,please specify in the comment box
below(sq ft) n/a n/a n/a
New infiltrating permeable pavement on
13 subdivided lots(sq ft) n/a n/a n/a
New infiltrating permeable pavement not on
14 subdivided lots(sq ft) n/a n/a n/a
Existing BUA that will remain(not subject to
15 permitting)(sq ft) 110032 sf 41071 sf 68961 sf
16 Existing BUA that is already permitted(sq ft) n/a n/a n/a
17 Existing BUA that will be removed(sq ft) 69135 sf 69135 sf n/a
18 Percent BUA 25.3% 79.2% 10.7%
19 Design storm(inches) n/a 1.0 in n/a
20 Design volume of SCM(cu ft) - n/a 8908 cf n/a
21 Calculation method for design volume n/a SADA/SCS n/a
ADDITIONAL INFORMATION
Please use this space to provide any additional information about the
22 drainage area(s): -
Drainage areas include surface waters and percent BUA represents total BUA.
r
within each drainage area
1
—I

WET POND
j 1 Drainage area number 1
2 Minimum required treatment volume jcu ft) 7977 cf
GENERAL MDC mQ14924405O RIM
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 No
side slopes? -
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? Drawdown Orifice
10 If applicable,will the SCM be cleaned out after construction? j 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 licensedlrofessional? Yes
WETPOND MDC FROM'2H.10S3
181Sizing 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 896.50
removal)(fmsl)
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 897.50
22 Elevation of the bottom of the vegetated shelf(fmsl) 902.50
23'Elevation of the permanent pool(fmsl) 902.50
24 Elevation of the top of the vegetated shelf(fmsl) 903.50
25 Elevation of the temporary pool(fmsl) 903.30
26 Surface area of the main permanent pool(square feet) 7814
27 Volume of the main permanent pool(cubic feet) _ 26341 cf
28 Average depth of the main pool(feet) j 3.37 ft
29 Average depth equation used Equation 2
30 If using equation 3,main pool perimeter(feet) N/A
31 If using equation 3,width of submerged veg.shelf(feet) N/A
32 Volume of the forebay(cubic feet) 4427 cf
33 Is this 15-20%of the volume in the main pool? Yes
34 Clean-out depth for forebay(inches) 12 in
35 Design volume of SCM(cu ft) 8908 cf
36 Is the outlet an orifice or a weir? k Orifice
37 If orifice,orifice diameter(inches) 1.5
38 If weir,weir height(inches) _ N/A
39 If weir,weir length(inches) N/A
40 Drawdown time for the temporary s
P rY pool(days)Y ) i 3.38
Are the inlet(s)and outlet located in a manner that avoids short-
41 circuiting? Yes
42 Are berms or baffles provided to improve the flow path? I Yes
43 Depth of forebay at entrance(inches) 42 in
44 Depth of forebay at exit(inches) 30 in
45 Does water flow out of the forebay in a non-erosive manner? Yes
46 Width of the vegetated shelf(feet) i _ 6 ft
47 Slope of vegetated shelf(H:V) I 6:1
48 Does the orifice drawdown from below the top surface of the Yes
permanent pool?
Does the pond minimize impacts to the receiving channel from the 1-
49 yr,24-hr storm? Yes
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 _ Fescue
541 Has a planting plan been provided for the vegetated shelf? Yes
ADDITIONAL INFORMATION -
55Please use this space to provide any additional information about the
wet pond(s):
Wet.Paw, 3 7:57 PM 9/24/2024