20161069 Ver 2_Supplement EZ ND-158-17_20190108

SUPPLEMENT -EZ FORM COVER PAGE
Please indicate the types, quantities and locations of SCMs that will be used on this project:
_ Quantity Location(s)
Infiltration System
Bioretention Cell
Wet Pond 1 Southern Property Line
Stormwater Wetland
Permeable Pavement
Sand Filter
Rainwater Harvesting _
Green Roof T
Level Spreader -Filter Strip
Disconnected Impervious Surface _
Treatment Swale.
Dry Pond -
Designer information for this project:
and Title:
address:
(City, State, Zip:
Phone number(s):
jEmail:
Designer
- SEAL
030176
Alr�t
Rusty Baksa, Principal Engineer
Land Development Solutions
310 Simmons Rd. Suite K
Knoxville, TN 37922
865-671-2281
[e-mail]
i
it
Signature f DkVigner
Date
Applicant:
Mailing Address:
Email:
Project Name:
ND -158-17
Address
Quality Drive, Southpoint Business Park
City / Town
Mocksville
Hollingsworth General Partnership
Joe Hollingsworth
2 Centre Plaza
Clinton, TN 37716
sworthcos.com
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.
j
f.: sir nnnN11
Cover Page 1 4:16 PM 12/21/2018

WET POND
ND -158-17
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)
56022 sf
Total surface water area (sq ft)
Sidewalk (sq ft)
825 sf
Total drainage area (sq ft)
710028 sf
Roof (sq ft)
152241 sf
BUA associated with existing development (sq ft)
sf
Roadway (sq ft)
Proposed new BUA (sq ft)
209088 sf
Other, please specify in the comment box below (sq ft)
Percent BUA of drainage area 1
29%
ITotal BUA (sq ft)
209088 sf
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwater program(s) that apply (please specify):
Design rainfall depth (in)
Minimum volume required (cu ft)
37300 cf
Design volume of SCM (cu ft)
64650 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)
18335 sf
#6 Location of vegetated shelf
Submerged
#1 Volume of the main permanent pool (cubic feet)
64650 cf
#6 Elevation of top of shelf (fmsl)
804 ft
#2 Average depth of the main pool (feet)
4 ft
#6 Elevation of bottom of shelf (fmsl)
803 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)
798 ft
#7 Diameter of drawdown orifice (inches)
3.0 in
#2 Elevation of the top of the permanent pool (fmsl)
804 ft
#7 Drawdown time for the temporary pool (hours)
88 hrs
#2 Elevation of the top of the temporary pool (fmsl)
807 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 10:31 AM 1/8/2019