20161069 Ver 2_Supplement EZ ND-156-17_20190108

SUPPLEMENT -EZ FORM COVER PAGE
Please indicate the types, quantities and locations of SCMs that will be used on this project:
_
Infiltration System
Quantity
Location(s)
310 Simmons Rd. Suite K
—
_
Bioretention Celt
Wet Pond
Stormwater Wetland
Permeable Pavement
Sand Filter
Rainwater Harvesting
Green Roof
Level Spreader -Filter Strip
_ Disconnected Impervious_ Surface
Treatment Swale
Dry Pond
865-671-2281
[e-mail]
City, State, Zip:
1
Eastern' Property Line
865-457-3601
-
[e-mail]
_
_
Designer information for this project:
Name and Title:
Organization:
Street address:
City, State, Zip:
Phone number(s):
Email:
Rusty Baksa, Principal Engineer
Land Development Solutions
310 Simmons Rd. Suite K
—
Knoxville, TN 37922
865-671-2281
[e-mail]
Designer
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Date
Applicant:
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Project Name:
ND -156-17
Address
Quality Drive, Southpoint Business Park
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Mocksville
Company:
Hollingsworth Investments XI
Contact:
Joe Hollingsworth _
Mailing Address:
2 Centre Plaza
City, State, Zip:
Clinton, TN 37716
Phone number(s):
865-457-3601
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.
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 4:15 PM 12/21/2018

WET POND
ND -156-17
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)
sf
Parking / driveway (sq ft)
38000 sf
Total surface water area (sq ft)
Sidewalk (sq ft)
1150 sf
Total drainage area (sq ft)
631620 sf
Roof (sq ft)
108960 sf
BUA associated with existing development (sq ft)
sf
Roadway (sq ft)
Proposed new BUA (sq ft) 1
148110 sf
Other, please specify in the comment box below (sq ft)
Percent BUA of drainage area
23%
ITotal BUA (sq ft)
148110 sf
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwater program(s) that apply (please specify):
Design rainfall depth (in)
Minimum volume required (cu ft)
27175 cf
Design volume of SCM (cu ft)
35600 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 lot, 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?
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?
Pump (preferred)
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)
6 ft
#1 Surface area of the main permanent pool (square feet)
10360 sf
#6 Location of vegetated shelf
Submerged
#1 Volume of the main permanent pool (cubic feet)
35600 cf
#6 Elevation of top of shelf (fmsl)
816 ft
#2 Average depth of the main pool (feet)
4 ft
#6 Elevation of bottom of shelf (fmsl)
815 ft
#2 Was the vegetated shelf included in the calculation of average depth?
No
#6 Slope of vegetated shelf (H:V)
6:1
#2 Elevation of the bottom of the permanent pool (fmsl)
810 ft
#7 Diameter of drawdown orifice (inches)
2.5 in
#2 Elevation of the top of the permanent pool (fmsl)
816 ft
#7 Drawdown time for the temporary pool (hours)
92 hrs
#2 Elevation of the top of the temporary pool (fmsl)
819 ft
#7 Does the orifice drawdown from below the top surface of the permanent pool?
Yes
#3 Depth provided for sediment storage (inches)
6 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)?
#10 Is a trash rack or other device provided to protect the outlet system?
Yes
#5 Volume of the forebay (cubic feet)
13,320
#11 Are the dam and embankment planted in non -clumping turf grass?
Yes
#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
Non -clumping Fescue
#5 Depth of forebay at entrance (inches)
84 in
#11 Describe the planting plan for the vegetated shelf:
#5 Depth of forebay at exit (inches)
#5 Does water flow out of the forebay in a non-erosive manner?
#5 Clean-out depth for forebay (inches)
#5 Will the forebay be cleaned out when the depth is reduced to less than the above?
48 in
Yes
12 in
Yes
See Sheet C505
ADDITIONAL INFORMATION
Please use this space to provide any additional information about this wet pond that you think is relevant to the review:
Wet Pond 1 9:50 AM 1/8/2019