SW6231108_Supplement-EZ Form_20231121

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
:PROJECT INFORMATION
1 Project Name Hoke County Apartments
2 Project Area(ac) ..___.� 17.56_.. _ ......
3 Coastal Wetland Area(ac) 0 .....
4 Surface Water Area(ac)
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) w N/A
8 Will the vegetated setback remain vegetated? N/A
9 III BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? No
10 Is streambank stabilization proposed on this project? —-- _•___.__._No__.__._..._
NUMBER AND TYPE OF SCMs:
.
11 Infiltration System r
12 Bioretention Cell 0
13 Wet Pond ._._....__._...._.._.___._.__._.w_..___.�
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) 0____.
20 Disconnected Impervious Surface(DIS) � 0
21 Treatment Swale 0
22 D Pond
l : R
23 EStormFiiter I 0
24 !Silva Cell 0
25 Bayfilter .............._...W. _:..... ._O
25 Bayfilter
Filterra — -- 0
_
FORMS LOADED
(DESIGNERICERTIFICATION
27 Name and Title: Carlo Pardo,PE
28 Organization: Bowman North Carolina,!Ltd..
29 Street address: 4006 Barrett Drive,Suite 104
30 City,State,Zip: Raleigh,NC 27609
31 Phone number(s): 919-553-6570
32 Email: j [e-mail]
Ce ifcabon Staternant:
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
01\11111111/i//////r ,
•
SEAL Signature of Designer
051571 i
•
4:14 0 E ?),",„\ efibta3
.;,Seal' Date

DRAINAGE AREAS
1 Is this a high density project? Yes
2 If so,number of drainage areas/SCMs 1 �
3 Does this project have low density areas? I 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 t__ h ( 1
4 T •e of SCM , . Wet Pond
5 Total drainage area s• ft 764974 sf 1 716241 '
6 I Onsite draina•e area s• ft 764974 sf 716241
7 Offsite drains•e area s• ft E
8 Total BUA in •ro'ect s•ft 458579 sf 448705 sf
New BUA on subdivided lots(subject to permitting)j
9 s•ft
New BUA not on subdivided lots(subject to
10 •ermitting)(sf) 458579 sf 448705 sf
11 Offsite BUA s• ft
12 Breakdown of new BUA not on subdivided lots:
-Parkint)
-Sidewalk(sq ft) 1 26527 sf 26527 sf •
-Roof(sq ft) 105582 sf - 105582 sf
-Roadway(sq ft) 217896 sf 208022 sf
-Future(sq ft) w _
-Other,please specify in the comment box
below(sq ft) 108574 sf t 108574 sf
New infiltrating permeable pavement on 1
13 subdivided lots(sq ft)
New infiltrating permeable pavement not on
14 subdivided lots(sq ft)
Existing BUA that will remain(not subject to a
15 permitting)(sq ft) a
16 Existing BUA that is already permitted(sq ft) _
17 Existing BUA that will be removed(sq ft)
18 Percent BUA 1 59.95% :62.6% _
19 'Design storm(inches) 1.0 in
20 Design volume of SCM(Cu ft) i 38972 cf
21 Calculation method for design volume -Simple Method I
ADDITIONAL INFORMATION.
Please use this space to provide any additional information about the
22 'drainage area(s):
gOther BUA refers to 80%of parcel 494560301440 allocated for future
development.
_ .v

WET POND
1 Drainage area number I 1
2 Minimum required treatment volume Cu( ft 36637 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 No
side slopes?
Are the inlets,outlets,and receiving stream protected from erosion P- _..__......_.......___.'
7 10- -ar storm? Yes
e 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 a.plicable,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)? Yes13 mm
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)? j Yes
. Does the SCM follow the device specific MDC? Yes_u
17 Was the SCM deli.ned b an NC licensed •rofessional?
Yes
WET POND MDC FROM 02H.1053
18 Sizing method used J 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 j 245.00
removal fmsl
21 Elevation of the main pool bottom(top of sediment removal)(fmsl) 246.00
22jElevation of the bottom of the vegetated shelf(fmsl) 254.00
23 Elevation of the permanent pool(fmsl) f 254.50
24 Elevation of the top of the vegetated shelf(msl) j 255.00
25 Elevation of the temporary pool(fmsl) 256.10
26 Surface area of the main permanent pool(square feet) l 14170
27 Volume of the main permanent pool(cubic feet) 76763 cf
28 Average depth of the main pool(feet) 6.07 ft.
291Average depth equation used ] Equation 3_
301 If using equation 3,main pool perimeter(feet) 635.0 ft
31 If using equation 3,width of submerged veg.shelf(feet) 3.0 ft
32 Volume of the foreba cubic feet j 3155 cf
EIs this 15-20%of the volume in the main pool? Yes
Clean-out depth for forebay(inches) 18 in
©Design volume of SCM(cu ft) 36637.cf
36 Is the outlet an orifice or a weir? Orifice
37 If orifice,orifice diameter(inches) 2.50 in Y"
38 If weir,weir height(inches) _
39 If weir,weir length(inches)
40 Drawdown time for the temporary pool{days) (_ 2.92
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? j _ Yes
43 Depth of forebay at entrance(inches) 30 in
44 Depth of forebay at exit(inches) 24 in
45 Does water flow out of the forebay in a non-erosive manner? Yes
46 Width of the vegetated shelf(feet) j 6 ft
47 Slope of vegetated shelf(H:V) ( 6:1
Does the orifice drawdown from below the top surface of the48 Yes
permanent pool?
Does the pond minimize impacts to the receiving channel from the 1-
49 yr,24-hr storm? I Yes
Are fountains proposed?(If Y,please provide documentation that
50 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 I H rid Bermuda
54 Has •lantin. .1an been •rovided for the vegetated shelf? I W Yes
ADDITIONAL INFORMATION _
Please use this space to provide any additional information about the
55 wet pond(s):
Wet Pond 1 3:07 PM 11/6/2023