SW3170503 (13)

SUPPLEMENT -EZ FORM COVER PAGE
Please indicate the types, quantities and locations of SCMs that will be used on this project:
Designer information for this project:
and Title:
I address:
State, Zip:
e number(s):
Designer
Seal
Joel Causey, PE - Senior Project Manager
ColeJenest & Stone, P.A.
200 S. Tryon Street, Suite 1400
Charlotte, NC 28202
704-971-4519
Signature of Designer
Date
Applicant:
Project Name:
Afton Ridge Industrial
Address
6979 Untz Road
City / Town
Concord, NC 28027
!'n vlronmen ta!
QualJry
Company:
Quantity
Location(s)
Infiltration System
Mailing Address:
301 South College Street, Suite 2800
Bioretention Cell
Charlotte, NC 28202
Phone number(s):
Wet Pond
1
35d25'06", -080d41'34"
Stormwater Wetland
Permeable Pavement
Sand Filter
Rainwater Harvesting
Green Roof
Level Spreader -Filter Strip
Disconnected Impervious Surface
Treatment Swale
Dry Pond
Designer information for this project:
and Title:
I address:
State, Zip:
e number(s):
Designer
Seal
Joel Causey, PE - Senior Project Manager
ColeJenest & Stone, P.A.
200 S. Tryon Street, Suite 1400
Charlotte, NC 28202
704-971-4519
Signature of Designer
Date
Applicant:
Project Name:
Afton Ridge Industrial
Address
6979 Untz Road
City / Town
Concord, NC 28027
!'n vlronmen ta!
QualJry
Company:
CK Afton Ridge Land, LLC
Contact:
Landon Wyatt, III
Mailing Address:
301 South College Street, Suite 2800
City, State, Zip:
Charlotte, NC 28202
Phone number(s):
704-342-9000
Email:
I [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.
I am aware that there are significant penalties for submitting false
information including the possibility of fines and imprisonment for knowing
violations as well as a report being made to my professional board.
Cover Page 1 4:35 PM 6/7/2017

WET POND
Afton Ridge Industrial
THE DRAINAGE AREA
1
Drainage area number
#1
Break down of BUA in the drainage area (both new and existing):
Total coastal wetlands area (sq ft)
N/A
Parking / driveway (sq ft)
Incl. in Roadway
Total surface water area (sq ft)
N/A
Sidewalk (sq ft)
Incl. in Roadway
Total drainage area (sq ft)
1102068 sf
Roof (sq ft)
294500 sf
BUA associated with existing development (sq ft)
N/A
Roadway (sq ft)
43744 sf
Proposed new BUA (sq ft)
732244 sfOther,
please specify in the comment box below (sq ft)
N/A
Percent BUA of drainage area
66%
Total BUA (sq ft)
732244 sf
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwater program(s) that apply (please specify):
Design rainfall depth (in)
1.0 in
NPDES Stormwater Program - Phase II
Minimum volume required (cu ft)
60948 cf
Design volume of SCM (cu ft)
91398 cf
GENERAL MDC FROM 02H.1050
#1 Is the SCM sized to treat the SW from all surfaces at build -out?
Yes
#7 If applicable, with the SCM be cleaned out after construction?
Yes
#2 Is the SCM located on or near contaminated soils?
No
#8 Does the mainetenance access comply with General MDC (8)?
Yes
#3 What are the side slopes of the SCM (H:V)?
3:1
#9 Does the drainage easement comply with General MDC (9)?
Yes
#3 Does the SCM have retaining walls, gabion walls or other engineered side slopes?
No
#10 If the SCM is on a single family tot, does the plat comply with General MDC (10)?
#4 Are the inlets, outlets, and receiving stream protected from erosion (10 -year storm)?
Yes
#11 Is there an O&M Agreement that complies with General MDC (11)?
Yes
#5 Is there a a bypass for flows in excess of the design flow? I
Yes
1#12 Is there an O&M Plan that complies with General MDC (12)?
Yes
#6 What is the method for dewatering the SCM for maintenance? Drawdown Orifice
1#13 Was the SCM designed by an NC licensed professional?
Yes
WET POND MDC FROM 02H.1053
#1 Method used
SA/DA
#6 Width of the vegetated shelf (feet)
loft
#1 Surface area of the main permanent pool (square feet)
23734 sf
#6 Location of vegetated shelf
@ Normal Pool
#1 Volume of the main permanent pool (cubic feet)
76965 cf
#6 Elevation of top of shelf (fmsl)
632 ft
#2 Average depth of the main pool (feet)
4.44 ft
#6 Elevation of bottom of shelf (fmsl)
631 ft
#2 Was the vegetated shelf included in the calculation of average depth?
No
#6 Slope of vegetated shelf (H:V)
10:1
#2 Elevation of the bottom of the permanent pool (fmsl)
626 ft
#7 Diameter of drawdown orifice (inches)
3.0 in
#2 Elevation of the top of the permanent pool (fmsl)
631.5 ft
#7 Drawdown time for the temporary pool (hours)
70 hrs
#2 Elevation of the top of the temporary pool (fmsl)
634 ft
#7 Does the orifice drawdown from below the top surface of the permanent pool?
No
#3 Depth provided for sediment storage (inches)
12 in
#8 Does the pond minimize impacts to the receiving channel from the 1 -yr, 24 -hr storm?
Yes
#4 Are the inlet(s) and outlet located in a manner that avoids short-circuiting?
Yes
#9 Are fountains proposed?
No
#4 Describe any measures, such as berms or baffles, that will be taken to improve the flow path:
#9 If yes, is documentation provided per Wet Pond MDC (9)?
Inlets are located at outside of low LW shaped pond, outlets at center of pond for maximum flow path
#10 Is a trash rack or other device provided to protect the outlet system?
Yes
#5 Volume of the forebay (cubic feet)
14433
#11 Are the dam and embankment planted in non -clumping turf grass?
No
#5 Is this 15-20% of the volume in the main pool?
Yes
#11 Species of turf that will be used on the dam and embankment
"Elite" Tall Fescue
#5 Depth of forebay at entrance (inches) 54 in
#5 Depth of forebay at exit (inches) 42 in
#5 Does water flow out of the forebay in a non-erosive manner? Yes
#5 Clean-out depth for forebay (inches) 12 in
#5 Will the forebay be cleaned out when the depth is reduced to less than the above? Yes
ADDITIONAL INFORMATION
Please use this space to provide any additional information about this wet pond that you think is relevant to the review:
Refer to the attached BMP Detail/Sheet C-910 of the attached Construction documents.
#11 Describe the planting plan for the vegetated shelf:
Refer to the attached BMP Detail, Detail 1/Sheet C-910 of the attached Construction Documents.
Wet Pond 2 4:35 PM 6/7/2017