HomeMy WebLinkAboutSW6200601_Supplement-EZ Form_20201016r"1"LCIYICIV 1 -CL lrV V CR 1"'HVC
JECT INFORMATION
Project Name
Project Area (ac)
Coastal Wetland Area (ac)
Surface Water Area (ac) _
Is this project High or Low Density?
Does this project use an off -site SCM?
PLIANCE WITH 02H .1003(4)
:Width of vegetated setbacks provided (feet)
Will the vegetated setback remain vegetated? _
Is BUA other that as listed in .1003(4)(c-d) out of the setback?
Is streambank stabilization proposed on this project?
ABER AND TYPE OF SCMs:
Infiltration System
Bioretention Cell
3 Wet Pond
I Stormwater Wetland
3 Permeable Pavement
3 Sand Filter
7 :Rainwater Harvesting (RWH)
3 Green Roof
3 Level Spreader -Filter Strip (LS-FS)
) Disconnected Impervious Surface (DIS)
1 Treatment Swale
2 Dry Pond
3 StormFilter
4 'Silva Cell
5 Bayfilter
6 Filterra
ti R,, L0A0EJ
SIGNER CERTIFICATION
7 Name and Title:
8 ,Organization:
9 Street address:
0 City, State, Zip: .
1 'Phone number(s):
2 'Email:
Roadmaster Truck School
7.6
0
0
High
a NO, - -
No
No
Zak Shipman, PE -President
Shipman Engineering, PLLC
137 Middlegreen Place
_Holly Springs, NC 27540
(919) 90070006
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 Design& i
Date
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Is this If so,anulmberof drainage gh densifty tareas/SCMs Y1 s
Is all/part of this project subject to previous rule
versions? No
IDPI LOADE_)
NAGE AREA INFORMATION Entire Slte
Type of SCM _
Total BUA in project (sq ft) 253085 sf
New BUA on subdivided lots (subject to
permitting) (sq ft)
:New BUA outside of subdivided lots (subject to
[permitting) (sf) 170706 sf
Offsite - total area (sq ft)
Offsite BUA (sq ft)
Breakdown of new BUA outside subdivided lots:
Parking (sq ft)
18290 sf
Sidewalk (sq ft)
1186 sf
Roof (sq ft)
10647 sf
Roadway (sq ft)
10207 sf,
Future (sq ft�__._________--__
Other, please specify in the comment box
below (sq ft)
130376 sf
'New infiltrating permeable pavement on
isubdivided lots (sq ft)
'New infiltrating permeable pavement outside of
'subdivided lots (sq ft)
' Exisitng BUA that will remain (not subject to
,permitting) (sq ft)
82379 sf
(Existing BUA that is already permitted (sq ft
Existing BUA that will be removed (s ft)
40387 sf--
'Percent BUA
76% _
Design storm (inches)
Design volume of SCM (cu ft
Calculation method for design volume
)ITIONAL INFORMATION
Please use this space to provide any additional information about the
:drainage area(s):
ar BUA consists of dumpster pad, gravel test pad area, and concrete
pad area.
t 'Type of SCM
i Total BUA from project (sq ft)
i 1995 rules
SL 2066-246
2008 rules -
2017 rules
New BUA on subdivided lots (subject to
7 ',permitting) (sq ft)
1995 rules
SL 2006-246
2008 rules _-
2017 rules
New BUA outside of subdivided lots (subject
8 to permitting) (sf)
1995 rules
SL 2006-246
2008 rules
2017 rules
9 'Offsite - total area (sq ft)
1995 rules _
SL 2006-246
2008 rules
2017 rules
0 'Offsite BUA (sq ft)
1995 rules
SL 2006-246
2008 rules
I 2017 rules
167575 sf
18290 sf
1186 sf
10647 sf
8197 sf
129255 sf
1 in
13496 cf
167575 sf
{v
—SL 2006-246
2008 rules
2017 rules
Breakdown of new BUA:
T Parking (sq ft)___ ----
Sidewalk (sq ft)
- Roof (sq ft)
Roadway (sq ft)
Future (sq ft)
Other, please specify in the comment box
below (sq ft)
New infiltrating permeable pavement on
subdivided lots (sq ft)
New infiltrating permeable pavement outside of
subdivided lots (sq ft) _
Exisitng BUA that will remain (not subject to
permitting) (sq ft)
Existing BUA that is already permitted (s_q�
Existing BUA that will be removed (sq ft)
Percent BUA
Design volume of SCM (cu ft)
Calculation method for design volume
f IONAL INFORMATION
Please use this space to provide any additional
information about the drainage area(s):
1 in
18290 sf
18290 sf
1186 sf
1186 sf
10647 sf
_-- _,_. _
10647 sf
10207 sf
8197 sf
130376 sf
129255 sf
82379 sf
40387 sf 28899 sf_
76% 79%
13496 cf
Simple Metho4
ET POND
1 Drainage area number 1
21 Design volume of SCM (cu ft) 13496 cf
3'! Is the SCM sized to treat the SW from all surfaces at build -out? Y_&s
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
6engineered side slopes? No
Are the inlets, outlets, and receiving stream protected from erosion
7(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 (preferr(
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)?
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
POND MDC FROM 02H .1053
18' Method used
S/VDA
19; Has a stage/storage table been provided in the calculations?
Yes
Elevation of the excavated main pool depth (bottom of sediment
20 removal) (fmsl)
190.25
21 Elevation of the main pool bottom -(top of sediment removal) (fmsl)
190.75
22 Elevation of the bottom of the vegetated shelf (fmsl)
196.25
23 Elevation of the permanent pool (fmsl)
196.75
24 Elevation of the top of the vegetated shelf (fmsl)
197 25
25 Elevation of the temporary pool (fmsl)
197.44
26 Surface area of the main permanent pool (square feet)
13993:1
27 Volume of the main permanent pool (cubic feet)
55599 cf
28 Average depth of the main pool (feet)
3.97 ft _
29 Average depth equation used
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) r
9047 cf
33 Is this 15-20% of the volume in the main pool?
Yes
34 Clean -out depth for forebay (inches)
Varies -See below
35 Design volume of SCM (cu ft)
13496 cf
36 Is the outlet an orifice or a weir?
Orifice
37 If orifice, orifice diameter (inches)
1.75 in.
38 If weir, weir height (inches)
39 If weir, weir length (inches)
_
40 Drawdown time for the temporary pool (days)
2.42 _
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?
No
43 Depth of forebay at entrance (inches)
Varies -See below
44 Depth of forebay at exit (inches)
Varies -See below
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
—
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
Are fountains proposed? (If Y, please provide documentation that
50 MDC(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? I Yes
53 Species of turf that will be used on the dam and embankment Bermu
54 Has a planting plan been provided for the vegetated shelf? Yes
ATIONAI INFORMATION
.� Please use this space to provide any additional information about
55 the wet pond(s): 3
4
Clean -Out Depth of Forebays is as follows:
Forebay 1: 72 inches
Forebay 2: 48 inches
Depth of Forebay Entrance is as follows:
Forebay 1: 84 inches
Forebay 2: 60 inches
Depth of Forebay Exit is as follows:
Forebay 1: 78 inches
Forebay 2: 54 inches