SW3170603 - Larkin Subidivision Phase 6B (2)

SUPPLEMENT -EZ FORM COVER PAGE
Please indicate the types, quantities and locations of SCMs that will be used on this protect
Quantity Location(s)
Infiltration System
Bioretention Cell
Wet Pond 4
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:
Applicant:
Project Name:
Larkin Golf Course Ph. 613
Address
City / Town
Statesville, NC
Envlronmrn
Quality
Name and Title:
Matthew Johnson (Civil Engineer II)
Company: Dependable Development, Inc
Organization:
R. Joe Harris, Inc
Contact: Jeff Reasner
Street address:
127 Ben Casey Dr, Suite 101
Mailing Address 2649 Brekonridgs Dr, Suite 104
City, State, Zip:
Fort Mill, SC 29708
City, State, Zip: Monroe, NC 28110
Phone number(s):
[phone]
Phone number(s) [phone]
Email:
m�ohnson@r�oeharris com
Email [e-mail]
Designer
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Certification Statement
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I certify, under penalty of law. that this Supplement -EZ form and all supporting
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information were prepared under my direction or supervision;
that the information In the form is, to the best of my knowledge
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and belief, true, accurate, and complete; and
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Signature of D lgner
- that the engineering plans, specifications, operation and maintenance
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agreements and other supporting information are consistent with
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the information provided here.
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re that there are significant es for a lse
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fines and imprisonmentlting
information including the possibility forr knowing
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violations as well as a report being made to my professional board
Cover Page 1 122 PM 5/22/2017

WET POND
Larkin Golf Course Ph. 6B
THE DRAINAGE AREA
^1
Drainage area number
Break down of BUA in the drainage area (both new and existing).
Total coastal wetlands area (sq ft)
Parking / driveway (sq ft)
10281 sf
Total surface water area (sq ft)
FWet7f]—
Sidewalk (sq ft)
3444 sf
Total drainage area (sq ft)
Roof (sq ft)
33915 sf
BUA associated with existing development (sq ft)
Roadway (sq ft)
19878 sf
Proposed new BUA (sq ft)
67518 sf
Other, please specify in the comment box below (sq ft)
N/A
Percent BUA of drainage area
48%
Total BUA (sq ft)
67518 sf
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwater program(s) that apply (please specify)*
Design rainfall depth (in)
1 0 in
Minimum volume required (cu ft)
5656 cf
Design volume of SCM (cu ft)
5794 cf
GENERAL MDC FROM 02H.1050
#1 Is the SCM sized to treat the SW from all surfaces at build -out?
No
#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 mametenance access comply with General MDC (8)?
Yes
#3 What are the side slopes of the SCM (H V)9
31
#9 Does the drainage easement comply with General MDC (9)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)v
#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
#12 Is there an O&M Plan that complies with General MDC (12)?
'Yes
#6 What is the method for dewatering the SCM for maintenances
Drawdown Orifice
#13 Was the SCM designed by an NC licensed professional?
Yes
WET POND MDC FROM 02H.1053
#1 Method used
SAIDA,
#6 Width of the vegetated shelf (feet)
6 ft
#1 Surface area of the main permanent pool (square feet)
5846 sf
#6 Location of vegetated shelf
@ Normal Pool
#1 Volume of the main permanent pool (cubic feet)
10075 cf
#6 Elevation of top of shelf (fmsl)
l 766 ft
#2 Average depth of the main pool (feet)
3 ft
#6 Elevation of bottom of shelf (fmsl)
765 ft
#2 Was the vegetated shelf included in the calculation of average depth?
Yes
#6 Slope of vegetated shelf (H V)
,6 1
#2 Elevation of the bottom of the permanent pool (fmsl)
761 ft
#7 Diameter of drawdown orifice (inches)
18 in
#2 Elevation of the top of the permanent pool (fmsl)
761 ft
#7 Drawdown time for the temporary pool (hours)
57,hrs
#2 Elevation of the top of the temporary pool (fmsl)
761 ft
#7 Does the onfice drawdown from below the top surface of the permanent pools
Yes
#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 storm9
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)
1661
#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
Centipede
#5 Depth of forebay at entrance (inches)
48 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 manner9
#5 Clean-out depth for forebay (inches)
#5 Will the forebay be cleaned out when the depth is reduced to less than the above?
Yes ,
12 in
Yes
Plants are tube placed in rows, alternating species and to be spaced 4'• on center Plant,types are from the NCDEQ BMP,
Manual approved species list
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 1 132 PM 5/22/2017

WET POND
Larkin Golf Course Ph. 6B
THE DRAINAGE AREA
Drainage area number
Break down of BUA in the drainage area (both new and existing).
2
Total coastal wetlands area (sq ft)
Parking / driveway (sq ft)
4392 sf
Total surface water area (sq ft)
M218236
Sidewalk (sq ft)
6239 sf
Total drainage area (sq ft)
Roof (sq ft)
24236sf
BUA associated with existing development (sq fl)
Roadway (sq ft)
10871 sf
Proposed new BUA (sq ft)
Other, please specify in the comment box below (sq ft)
N/A
Percent BUA of drainage area
21%
Total BUA (sq ft)
45738 sf
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwater program(s) that apply (please specify)
IDesign rainfall depth (in)
10 in
Minimum volume required (cu ft)
4346 cf
Des gn volume of SCM (cu ft)
4474 cf
GENERAL MDC FROM 02H.1050
#1 Is the SCM sized to treat the SW from all surfaces at build -out?
No
#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)?
31
#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
#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
WET POND MDC FROM 02H.1053
Orifice
#13 Was the SCM designed by an NC licensed professional?
Yes
#1 Method used
SAIDA
#6 Width of the vegetated shelf (feet)
611
#1 Surface area of the main permanent pool (square feet)
4438 sf
#6 Location of vegetated shelf
@ Normal Pool
#1 Volume of the main permanent pool (cubic feet)
7226 cf
#6 Elevation of top of shelf (fmsl)
786 ft
#2 Average depth of the main pool (feet)
3 ft
#6 Elevation of bottom of shelf (fmsl)
785 ft
#2 Was the vegetated shelf included in the calculation of average depth?
Yes
#6 Slope of vegetated shelf (H V)
61
#2 Elevation of the bottom of the permanent pool (fmsl)
781 ft
#7 Diameter of drawdown orifice (inches)
15 in
#2 Elevation of the top of the permanent pool (fmsl)
785 ft
#7 Drawdown time for the temporary pool (hours)
59 hrs
#2 Elevation of the top of the temporary pool (fmsl)
785 ft
#7 Does the orifice drawdown from below the top surface of the permanent pool?
Yes
#3 Depth provided for sediment storage (inches)
121n
#8 Does the pond minimize impacts to the receiving channel from the 1 -yr, 24 -hr storm?
as
#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)
1226
#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
Centipede
#5 Depth of forebay at entrance (inches)
481n
#11 Describe the planting plan for the vegetated shelf
#5 Depth of forebay at exit (inches) 481n
#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
1PIants are to be placed in rows, alternating species and spaced 4' on center Plant types to,be used are from the NCDEQ
JBMP Manual approved species list
Wet Pond 1 133 PM 5/22/2017

WET POND Larkin Golf Course Ph. 6B
THE DRAINAGE AREA
3
Drainage area number
Wet Pond #300
Break down of BUA in the drainage area (both new and existing)
Total coastal wetlands area (sq ft)
N/A
Parking / driveway (sq ft)
7621 sf
Total surface water area (sq ft)
N/A
Sidewalk (sq ft)
10378 sf
Total drainage area (sq ft)
310583 sf
Roof (sq ft)
70150 sf
BUA associated with existing development (sq ft)
58876 sf
Roadway (sq ft)
41660 sf
Proposed new BUA (sq ft)
70933 sf
Other, please specify in the comment box below (sq ft)
Percent BUA of drainage area
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
42%
Total BUA (sq ft)
129809 sf
Stormwater program(s) that apply (please specify)
Design rainfall depth (in)
1 0 in
GENERAL MDC FROM 02H.1050
#1 Is the SCM sized to treat the SW from all surfaces at build -out?
No
Minimum volume required (cu ft)
Design volume of SCM (cu ft)
#7 if applicable, with the SCM be cleaned out after construction
11020 cf
11127 cf
Yes
#2 Is the SCM located on or near contaminated soils?
No
#8 Does the mametenance access comply with General MDC (8)?
Yes
#3 What are the side slopes of the SCM (H V)?
31
#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
#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 Orrfice
#13 Was the SCM designed by an NC licensed professional?
Yes
WET POND MDC FROM 02H.1053
#1 Method used
SAIDA
#6 Width of the vegetated shelf (feet)
6 ft
#1 Surface area of the main permanent pool (square feet)
9828 sf
#6 Location of vegetated shelf
@ Normal Pool
#1 Volume of the main permanent pool (cubic feet)
21616 cf
#6 Elevation of top of shelf (fmsl)
770 ft
#2 Average depth of the main pool (feet)
3 ft
#6 Elevation of bottom of shelf (fmsl)
769 ft
#2 Was the vegetated shelf included in the calculation of average depth?
Yes
#6 Slope of vegetated shelf (H V)
61
#2 Elevation of the bottom of the permanent pool (fmsl)
765 ft
#7 Diameter of drawdown orifice (inches)
2 5 in
#2 Elevation of the top of the permanent pool (fmsl)
769 ft
#7 Drawdown time for the temporary pool (hours)
51 firs
#2 Elevation of the top of the temporary pool (fmsl)
769 ft
#7 Does the orifice drawdown from below the top surface of the permanent pool?
Yes
#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)9
#10 Is a trash rack or other device provided to protect the outlet system?
Yes
#5 Volume of the forebay (cubic feet)
3753
#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
Centipede
#5 Depth of forebay at entrance (inches)
48 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?
ADDITIONAL INFORMATION
48 in
Yes
12 in
Yes
Plants are to be placed in rows, alernating species and to be spaced 4' on center Plant types to be used are from the
NCDEQ BMP Manual approved species list
Please use this space to provide any additional information about this wet pond that you think is relevant to the review
Wet Pond 1 133 PM 5/22/2017

WET POND Larkin Golf Course Ph. 6B
THE DRAINAGE AREA
4
Drainage area number
Wet Pond #400
Break down of BUA in the drainage area (both new and existing).
Total coastal wetlands area (sq fl)
N/A
Parking I driveway (sq ft)
31612 sf
Total surface water area (sq ft)
N/A
Sidewalk (sq ft)
25636 sf
Total drainage area (sq ft)
559310 sf
- Roof (sq ft)
159299 sf
BUA associated with existing development (sq ft)
_
23463 sf
Roadway (sq ft)
69307 sf
Proposed new BUA (sq ft)
262291 sf
Other, please specify in the comment box below (sq ft)
Percent BUA of drainage area
51%
Total BUA (sq ft)
285754 sf
COMPLIANCE WITH THE APPLICABLE STORMWATER PROGRAM
Stormwater program(s) that apply (please specify)
Design rainfall depth (in)
1 0 in
GENERAL MDC FROM 02H.1050
Mmimum volume required (cu ft)
Design volume of SCM (cu ft)
23762 cf
23971 cf
#1 Is the SCM sized to treat the SW from all surfaces at build -out?
No
#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)?
31
#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
#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
#13 Was the SCM designed by an NC licensed professional?
Yes
WET POND MDC FROM 02H.1053
#1 Method used
SAIDA
#6 Width of the vegetated shelf (feet)
6 ft
#1 Surface area of the main permanent pool (square feet)
19483 sf
#6 Location of vegetated shelf
@ Normal Pool _
#1 Volume of the main permanent pool (cubic feet)
49275 cf
#6 Elevation of top of shelf (fmsl)
764 It
#2 Average depth of the main pool (feet)
4 ft
#6 Elevation of bottom of shelf (fmsl)
763 ft
#2 Was the vegetated shelf included in the calculation of average depth?
Yes
#6 Slope of vegetated shelf (H V)
61
#2 Elevation of the bottom of the permanent pool (fmsl)
759 It
#7 Diameter of drawdown orifice (inches)
3 8 in
#2 Elevation of the top of the permanent pool (fmsl)
763 ft
#7 Drawdown time for the temporary pool (hours)
50 hrs
#2 Elevation of the top of the temporary pool (fmsl)
763 ft
#7 Does the orifice drawdown from below the top surface of the permanent pool?
Yes
#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)?
#10 Is a trash rack or other device provided to protect the outlet system?
Yes
#5 Volume of the forebay (cubic feet)
8191
#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
Centipede
#5 Depth of forebay at entrance (inches)
481n
#11 Describe the planting plan for the vegetated shelf
#5 Depth of forebay at exit (inches) 481n
#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
Plants are to be placed in rows, alternating species and to be,spaced 4' on center Plant types to be used are from the
NCDEQ BMP Manual approved species list
Wet Pond 1 133 PM 5/22/2017

I Operation & Maintenance Agreement I
Project Name:
Project Location:
Larkin Golf Course 66
136 Club House Dr, Statesville, NC 28667
Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set location.
Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced immediately. These deficiencies can
affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the BMP(s).
The BMP(s) on this project include (check all that apply & correspc
Bioretention Cell
Quantity.
Dante: (01, 7
Dry Detention Basin
Quantity.
Iy
Nod -lel On') ri'a
Grassed Swale
Quantity:
1 rop�sQ
Green Roof
Quantity,
and
Infiltration Basin
Quantity,
Infiltration Trench
Quantity:
Level Spreader/VFS
Quantity,
Permeable Pavement
Quantity.
Proprietary System
Quantity,
Rainwater Harvesting
Quantity,
Sand Filter
Quantity,
Stormwater Wetland
Quantity,
5/25/2017
Wet Detention Basin
Quantity,
4
Disconnected Impervious Area
Present.
I No
User Defined BMP
Present:
No
O&M tables will
Location(s).
Location(s).
Location(s).
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
tie aaaea a
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to
the system or responsible party
* Responsible Party:
Title & Organization:
Street address:
City, state, zip -
Phone number(s):
Email:
Michael Foss - Dependable Development, Inc.
Operations Partner - Land Development
2649 Brekonridge Centre Drive, Suite 104
Monroe, NC 28110
980-313-3367
[e-mail]
Signature:
Dante: (01, 7
M O
a Notary Public for the State of
Iy
Nod -lel On') ri'a
County of MM k(Ln&A! a
do hearby certify that MIMLIp
1 rop�sQ
personally appeared before me this
5 day of -3cA JJQ /,.261-7
and
acknowledge the due execution of the
eratio s and Maintenance Agreement .
Witness my hand and official seal,
L
�a°,a
o 6
�ssion
TA9/.
CU
G N 0� D �'UB1.�
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1D � d
28,20
ST �'® C9 s°
5/25/2017
Version 1.4 P®d��BBi1IAg3�1
O&M Manual
Pagel of5

'Wet Detention Pond Maintenance Requirements I
The wet detention basin system is defined as the wet detention basin, pretreatment including forebays and the vegetated filter if
one is provided.
Important maintenance procedures:
_ Immediately after the wet detention basin is established, the plants on the vegetated shelf and perimeter of the
basin should be watered twice weekly if needed, until the plants become established (commonly six weeks)
_ No portion of the wet detention pond should be fertilized after the first initial fertilization that is required to
establish the plants on the vegetated shelf.
_ Stable groundcover should be maintained in the drainage area to reduce the sediment load to the wet detention
basin.
_ If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the
emergency drain should be minimized to the maximum extent practical.
- Once a year, a dam safety expert should inspect the embankment.
After the wet detention pond is established, it should be inspected once a month and within 24 hours after every storm event
greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance should be kept in a
known set location and must be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
BMP element:
Potential problem:
How I will remediate the problem:
The entire BMP
Trash/debris is present.
Remove the trash/debris.
The perimeter of the BMP
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, and then plant a
erosive gullies have formed.
ground cover and water until it is established. Provide lime and a one-
time fertilizer application.
Vegetation is too short or too
Maintain vegetation at a height of approximately six inches.
long.
The inlet device
The pipe is clogged.
Unclog the pipe Dispose of the sediment off-site.
The pipe is cracked or
Replace the pipe.
otherwise damaged.
Erosion is occurring in the
Regrade the swale if necessary to smooth it over and provide erosion
swale.
control devices such as reinforced turf matting or riprap to avoid future
problems with erosion
Stone verge is clogged or
Remove sediment and replace with clean stone.
covered in sediment (if
applicable).
The forebay
Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
a depth greater than the
possible. Remove the sediment and dispose of it in a location where it
original design depth for
will not cause impacts to streams or the BMP.
sediment storage.
Erosion has occurred.
Provide additional erosion protection such as reinforced turf matting or
riprap if needed to prevent future erosion problems.
Weeds are present
Remove the weeds, preferably by hand. If pesticide is used, wipe it on
the plants rather than spraying.
The vegetated shelf
Best professional practices
Prune according to best professional practices
show that pruning is needed
to maintain optimal plant
health.
Plants are dead, diseased or
Determine the source of the problem: soils, hydrology, disease, etc
dying.
Remedy the problem and replace plants. Provide a one-time fertilizer
application to establish the ground cover if a soil test indicates it is
necessary.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used, wipe it on
the plants rather than spraying
STORM -EZ 5/25/2017
Version 1 4 O&M Manual Page 3 of 5

Wet Detention Pond Maintenance Requirements (Continued)
The main treatment area
Sediment has accumulated to
Search for the source of the sediment and remedy the problem if
a depth greater than the
possible. Remove the sediment and dispose of it in a location where it
original design sediment
will not cause impacts to streams or the BMP.
storage depth.
Algal growth covers over 50%
Consult a professional to remove and control the algal growth.
of the area.
Cattails, phragmites or other
Remove the plants by wiping them with pesticide (do not spray).
invasive plants cover 50% of
the basin surface.
The embankment
Shrubs have started to grow
Remove shrubs immediately.
on the embankment.
Evidence of muskrat or
Use traps to remove muskrats and consult a professional to remove
beaver activity is present.
beavers.
A tree has started to grow on
Consult a dam safety specialist to remove the tree.
the embankment.
An annual inspection by an
Make all needed repairs.
appropriate professional
shows that the embankment
needs repair. (if applicable)
The outlet device
Clogging has occurred.
Clean out the outlet device Dispose of the sediment off-site.
The outlet device is damaged
Repair or replace the outlet device.
The receiving water
Erosion or other signs of
Contact the local NC Department of Environment and Natural
damage have occurred at the
Resources Regional Office.
outlet.
The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not
readily penetrate into accumulated sediments.
STORM -EZ 5/25/2017
Version 1 4 O&M Manual Page 4 of 5

Wet Detention Pond Design Summary
Wet Pond Diagram
WET POND ID
FOREBAY
MAIN POND
#100
Permanent Pool EI
765
Permanent Pool EI.
765
765.86
Temporary Pool El-
Temporary Pool EI:
76586
Pretreatment other
Clean Out Depth:
Clean Out Depth:
4
4
No
than forebay?
Sediment Removal EI-
761
Sediment Removal EI:
761
760
Has Veg. Filter? Yes Bottom Elevation:
Bottom Elevation:
760
WET POND ID
FOREBAY
MAIN POND
#200
Permanent Pool EI.
785
Permanent Pool EI.
785
Temporary Pool El,
785.88
Temporary Pool EI:
785.88
Pretreatment other No
Clean Out Depth:
4
Clean Out Depth:
4
than forebay?
Sediment Removal EI.
781
Sediment Removal EI.
781
Has Veg Filter? Yes
Bottom Elevation:
780
Bottom Elevation:
780
WET POND ID
FOREBAY
MAIN POND
#300
Permanent Pool EI.
769
Permanent Pool El.
769
Temporary Pool El:
770.02
Temporary Pool EI:
77002
Pretreatment other No
Clean Out Depth:
4
Clean Out Depth.
4
than forebay?
Sediment Removal El-
765
Sediment Removal El:
765
Has Veg Filter? Yes
Bottom Elevation:
764
Bottom Elevation-
764
WET POND ID
FOREBAY
MAIN POND
#400
Permanent Pool EI.
763
Permanent Pool El.
763
Temporary Pool EI:
764.14
Temporary Pool EI:
76414
Pretreatment other No
Clean Out Depth:
4
Clean Out Depth:
4
than forebay?
Sediment Removal EI:
759
Sediment Removal EI.
759
Has Veg Filter? Yes
Bottom Elevation:
758
Bottom Elevation:
758
STORM -EZ 5/25/2017
Version 1.4 O&M Manual Page 5 of 5