SW6191003_Supplement-EZ Form_20191211

SUPPLEMENT-EZ COVER PAGE
FORMS LOADED
PROJECT INFORMATION
I 1 'Project Name Hobson Road Concrete Plant
( 2 Project Area (ac) 4.99
3 -Coastal Wetland Area (ac) 0
4 Surface Water Area (ac) 0
5 r Is this project High or Low Density? High
6 'Does this project use an off -site SCM? No
jCOMPLIANCE WITH 02H .1003(4)
7 Width of vegetated setbacks provided (feet) n/a
8 Will the vegetated setback remain vegetated?
,._
9 i Is BUA other that as listed in .1003(4)(c-d) out of the setback?
10 ' Is streambank stabilization proposed on this project?
NUMBER AND TYPE OF SCMs: ---
—-—I
11 Infiltration System
_ _ 0
12 Bioretention Cell _
S
_ 0_-_
13 !Wet Pond
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)
_ _ 0 ,
a 20 'Disconnected Impervious Surface (DIS)
0
21 Treatment Swale
0
22 :Dry Pond _
0
'? 23 'StormFilter
0
` 24 Silva Cell
0
25 Bayfilter_ _
0 i
26 Filterra
0 I
FORMS LOADED
DESIGNER CERTIFICATION
27
Name and Title
_ _ _ C. Scott Brown, PE
128
!Organization:
4D Site Solutions,. Inc.
29
Street address:
409 Chicago Drive, Suite 112
30
City, State, Zip.
Fayetteville, NC 28306
31
;Phone number(s):
_ 910 426-6777
E 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.
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Signature of DT si
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Date

DRAINAGE AREAS
1 a Is this a high density protect? Yes
2 1 If so number of drainage areas/SCMs 1
rIs all/part of this project subject to previous rule
3 ,versions? No
FORMS LOADED
AREA INFORMATION
5 Total BUA in proiect (sq ft) _ ___ �. -.__981
. 02_sf _ 98102 sf
New BUA on subdivided lots (subject to ?
6 'permitting(sgft) _ _._ _ n/a -- n/a
_.. _
New BUA outside of subdivided lots (subject to
7 ;permittin 98102 sf _- 98102 sf -.-
8 _Offsite ,total area (sgft) _ sf -_ . - _ .- . sf
9 ; Offsite BUA (sq ft) _. _ sf. _ --__sf
10 Breakdown of new BUA outside subdivided lots. �..
Parking (sq ft) 96977 sf 96977 sf
Sidewalk (sq ft) 225 sf. £ - 225 sf
Roof (sq ft) . __- . 900 sf 900 sf
Roadway (sq ft)_ . _ sf sf...
r
i... Future_(sq ft)__...__.
Other, please specify in the comment box
sf sf
New infiltrating permeable pavement on
11 subdivided lots (sq ft) _ sf __ sf
I New infiltrating permeable pavement outside of t
12 ,subdivided lots (�1ft')." sf ' sf
..-.._ _.
Exisitng BUA that will remain (not subject to
13 permitting) (sq ft) ._ 4 sf _sf
14 aExisting BUA that is already permitted (sq ft) R sf sf
15 Existing BUA that will be removed (sq ft) 1869 sf J 1869 sf
16 Percent BUA 530% 53%
17 ,Design storm (inches) 1 in 1 in
19 iCalculation method for desi n volume SA/DAtt�.]
* S / A
18 ,Design volume of SCM (cu ft) 8130 CFcf
PJDA
ADDITIONAL INFORMATION
Please use this space to provide any additional information abo
20 idrainage area(s):_

Please use this space to provide any additional
21 j information about the drainage area(s).

WET POND
1 I Drainage area number 1
2 Design volume of SCM (cu ft) 8130 cf
3 iJs the SCM sized to treat the SW from all surfaces at build -out?
Ye6
i 4 'Is the SCM located away from contaminated soils?
Yes
5 What are the side slopes of the SCM (H:V)?
3:1
i$4
Does the SCM have retaining walls, gabion walls or other engineered .
6 side slo es?
No
Are the inlets, outlets, and receiving stream protected from erosion
(10-year storm)?
Yes
Is there an overflow or bypass for inflow volume in excess of the
_.. ... . ..... _.
8 design volume?
Yes
9 What is the method for dewatering the SCM for maintenance?
Pump (preferred)
101If 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)? _.
14:Is there an O&M Agreement that complies with General MDC (11)?
Yes
a 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
18'Method used SAIDA
19Has a stage/storage table been provided in the calculations? Yes
Elevation of the excavated main pool depth (bottom of sediment
20'removal)(fmsl) _ 231.00
21; Elevation of the main pool bottom -(top of sediment removal) (fmsl)
232.00
22' Elevation of the bottom of the vegetated shelf (fmsl)
236.00
23Elevation of the permanent pool (fmsl)
236.50
24I Elevation of the top of the vegetated shelf (fmsl)
237.00
25 Elevation of the temporary pool (fmsl)
2FA0
26, Surface area of the main permanent pool (square feet)
6065:1
I 27 Volume of the main permanent pool (cubic feet)
18842 cf
28!Average depth of the main pool (feet)
3.14 ft
E 291Average depth equation used
Equation 2
k30 If using equation 3, main pool perimeter (feet)
Oft
( 31 ! If using equation $, width of submerged veg. shelf (feet)
Oft
321Volume of the forebay (cubic feet)
2852 cf
i 331Is this 15-20% of the volume in the main pool?
Yes
I 341 Clean -out depth for forebay (inches)
12 in
s
y 35 Design volume of SCM (cu ft)
8136 cf
z 36 Is the outlet an orifice or a weir?
Orifice
371 If orifice, orifice diameter (inches)
1.5 in
36 If weir, weir height (inches)
39' If weir, weir length (inches)
40 Drawdown time -'for the temporary pool (days)
2.9
;Are the inlet(s) and outlet located in a manner that avoids short-
41circuiting?
Yes
a42 `Are berms or baffles provided to improve the flow path?
No
43 ' Depth of forebay at entrance (inches)
54 in
44: Depth of forebay at exit (inches)
48 in
45, Does water flow out of the forebay in a non -erosive manner?
Yes
46 Width of the vegetated shelf (feet)
6 ft
47iSlope of vegetated shelf (H:V)
6:1
i Does the orifice drawdown from below the top surface of the
48?permanent pool?
Yes
''Does the pond minimize impacts to the receiving channel from the 1-
49'yr, 24-hr storm?
Yes
( sAre fountains proposed? (If Y, please provide documentation that
50MDC(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
Bermuda Grass
I 54?Has a planting plan been provided for the vegetated shelf?
Yes
DDITIONAL INFORMATION
Please use this space to provide any additional information about the
55 wet pond(s):
Wet Pond 1 1:08 PM 12/11/2019