SW3220102_O&M Agreement/Plan_20220131

Operation & Maintenance Agreement
Project Name: WAXHAW DOWNTOWN CENTRAL PARK
Project Location: 301 GIVENS STREET, WAXHAW, NC
Cover Page
Maintenance records shall be kept on the following SCM(s). This maintenance record shall be kept in a log in a known set location.
Any deficient SCM 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 SCM(s).
The SCM(s) on this project include (check all that apply & corresponding O&M sheets will
Infiltration Basin Quantity:
Infiltration Trench Quantity:
Bioretention Cell Quantity:
Wet Pond Quantity:
Stormwater Wetland Quantity:
Permeable Pavement Quantity:
Sand Filter Quantity:
Rainwater Harvesting Quantity:
Green Roof Quantity:
Level Spreader - Filter Strip Quantity:
Proprietary System Quantity:
Treatment Swale Quantity:
Dry Pond Quantity:
Disconnected Impervious Surface Present:
User Defined SCM Present:
Low Density Present:
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):
Type:
1
1
No
No
F No
acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each SCM above, and attached O&M tables. I agree to notify NCDEQ 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:
Signature:
JEFF WELLS
TOWN MANAGER, TOWN OF WAXHAW
1150 N. BROOME ST.
WAXHAW, NC 28173
704-843-2195 EXT. 254
[e-mail]
Date:
a Notary Public for the State of Nor±b Carolina
County of yunim , do hereby certify that "j
personally appeared before me this 5H" day of eckmb'e' ^ and
acknowledge the due execution of the Operations and Maintenance Agreement.
Witness myqhapa gdofficial seal, LA 4�AWLLII�
Sea! My commission expires
STORM-EZ 1211512021
Version 1.5 O&M Agreement Page 1 of 1

Stormwater Wetland Maintenance Requirements
Important operation and maintenance procedures:
Immediately following construction of the stormwater wetland, conduct bi-weekly inspections and water wetland plants bi-
weekly until vegetation becomes established (commonly six weeks).
Before and immediately after plant installation, monitor water level and adjust to ensure that plants are not completely
inundated.
No portion of the stormwater wetland will be fertilized after the initial fertilization that is required to establish the wetland
plants.
- Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wetland.
At least once annually, a dam safety expert will inspect the embankment. Any problems that are found will be repaired
immediately.
After the wetland is established, it shall be inspeckpdarterly and within 24 hours after every storm event greater than 1.0 inches (o
inches if in a Coastal County.) Records of operation and maintenance shall be kept in a known set location and shall be available
request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element:
Potential problem:
How I will remediate the problem:
The entire wetland
Trashldebris is present.
Remove the trashMebris.
The perimeter of the wetland
Areas of bare soil and/or erosh
Regrade the soil if necessary to remove the gully, plant ground cover an
gullies have formed.
water until it is established. Provide lime and a one-time fertilizer applio
The inlet pipe is clogged (if
Unclog the pipe. Dispose of the sediment off -site.
applicable).
The inlet pipe is cracked or
otherwise damaged (if
Repair or replace the pipe.
The inlet device
applicable).
Erosion is occurring in the
Regrade the swale if necessary and provide erosion control devices suc
swale (if applicable).
reinforced turf matting or riprap to avoid future problems with erosion.
Sediment has accumulated in
Search for the source of the sediment and remedy the problem if possibl
a
the forebay to a depth of less
than 1 that inhibits the
Remove the sediment and dispose of it in a location where it will not cau
forebay from functioning well.
impacts to streams or the SCM.
The forebay
Erosion has occurred.
Provide additional erosion protection such as reinforced turf matting or ri
if needed to prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used, wipe it on if
plants rather than spraying.
Lion.
as

Stormwater Wetland Maintenance Requirements (Continued)
SCM element:
Potential problem:
How I will remediate the problem:
A tree has started to grow on tl
If the tree is <6" in diameter, remove the tree. If the tree is >6" in diamet
embankment.
consult a dam safety specialist to remove the tree.
An annual inspection by an
Embankment
appropriate professional show
that the embankment needs
Make all needed repairs immediately.
repair.
Evidence of muskrat or beaver
Consult a professional to remove muskrats or beavers and repair any ho
activity is present.
erosion.
Algal growth covers over 30%
the deep pool and shallow wat
Consult a professional to remove and control the algal growth.
areas.
Cattails, phragmites or other
invasive plants cover 30% of &
Remove the plants by hand or by wiping them with pesticide (do not spr
deep pool and shallow water
consult a professional.
areas.
The temporary inundation zon
remains flooded more than 5
Unclog the outlet device immediately.
days after a storm event.
Deep pool, shallow water an
shallow land areas
Determine the source of the problem: soils, hydrology, disease, etc. Re
Plants are dead, diseased or
the problem and replace plants. Provide a one-time fertilizer application
dying.
establish the ground cover if necessary.
Best professional practices
show that pruning is needed to
Prune according to best professional practices.
maintain optimal plant health.
Sediment has accumulated an
reduced the depth to 75% oft
Search for the source of the sediment and remedy the problem if possibl
original design depth of the
emove the sediment and dispose of it in a location where it will not cau
deep pools.
impacts to streams or the SCM.
Sediment has accumulated an
earth for the source of the sediment and remedy the problem if possibl
Micropool
reduced the depth to 75% of th
ERemove the sediment and dispose of it in a location where it will not caw
original design depth.
impacts to streams or the SCM.
Clogging has occurred.
99 g
Clean out the outlet device. Dispose of the sediment in a location where
not cause impacts to streams or the SCM.
The outlet device
The outlet device is damaged
Repair or replace the outlet device.
Z

Stormwater Wetland Maintenance Requirements (Continued)
SCM element:
Potential problem:
How I will remediate the problem:
Erosion or other signs of
damage have occurred at the
Repair the damage and improve the flow dissipation structure.
outlet.
The receiving water
Discharges from the wetland
are causing erosion or
Contact the local NCDEQ Regional Office.
sedimentation in the receiving
water.

Important operation and 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 pond should be fertilized after the initial fertilization that is required to
establish the plants on the vegetated shelf.
Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wet
pond.
If the pond must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain will be minimized as much as possible.
At least once annually, a dam safety expert will inspect the embankment. Any problems that are
found will be repaired immediately.
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.
After the wet pond is established, it will be inspected quarterly 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 shall be
kept in a known set location and shall be available upon request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element:
Potential problem:
How to remediate the problem:
The entire wet pond
Trash/debris is present.
Remove the trash/debris.
The perimeter of the
Areas of bare soil and/or
Regrade the soil if necessary to remove the gully, plant ground
erosive gullies have
cover and water until it is established. Provide lime and a one
wet pond
formed.
time fertilizer application.
The inlet pipe is clogged
applicable).
(ifThe
Unclog the pipe. Dispose of the sediment off -site.
inlet pipe is cracked
or otherwise damaged (if
Repair or replace the pipe.
The inlet device
applicable).
Regrade the swale if necessary and provide erosion control
Erasion is occurring in the
devices such as reinforced turf matting or riprap to avoid
swale (if applicable).
future problems with erosion.
Sediment has
accumulated to a depth
Search for the source of the sediment and remedy the problerr
greater than the original
if possible. Remove the sediment and dispose of it in a
design depth for sediment
location where it will not cause impacts to streams or the SCM
storage.
The forebay
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.

SCM element:
Potential problem:
How to remediate the problem:
Sediment has
accumulated to a depth
Search for the source of the sediment and remedy the problerr
greater than the original
if possible. Remove the sediment and dispose of it in a
design sediment storage
location where it will not cause impacts to streams or the SCM
depth.
The main treatment
Algal growth covers over
area
50% of the area.
Consult a professional to remove and control the algal growth.
p g
Cattails, phragmites or
other invasive plants
Remove the plants by wiping them with pesticide (do not
cover 50% of the basin
spray).
surface.
Best professional
practices show that
pruning is needed to
Prune according to best professional practices.
maintain optimal plant
health.
The vegetated shelf
Determine the source of the problem: soils, hydrology,
Plants are dead, diseased
disease, etc. Remedy the problem and replace plants. Provid
or dying.
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.
Shrubs have started to
Remove shrubs immediately.
grow on the embankment.
Evidence of muskrat or
Consult a professional to remove muskrats or beavers and
beaver activity is present.
repair any holes or erosion,
A tree has started to
Consult a dam safety specialist to remove the tree.
The embankment
grow on the embankment.
An annual inspection by
an appropriate
professional shows that
Make all needed repairs immediately.
the embankment needs
repair.
Clogging has occurred.
gg g
Clean out the outlet device and dispose of any sediment in a
location where it will not cause impacts to streams or the SCM
The outlet device
The outlet device is
damaged.
Repair or replace the outlet device.
Weeds or volunteer trees
are growing on the mat.
Remove the weeds or trees.
=loating wetland island
'if applicable)
The anchor cable is
damaged, disconnected
Restore the anchor cable to its design state.
or missing.

SCM element:
Potential problem:
How to remediate the problem:
Erosion or other signs of
damage have occurred at
Repair the damage and improve the flow dissipation structure.
the outlet.
The receiving water
Discharges from the wet
pond are causing erosion
Contact the focal NCDEQ Regional Office,
or sedimentation in the
receiving water,

Wet Fond Diagram
WET POND ID
Pretreatment
other than
Has Veg. Filter?, No:'
FOREBAY
Permanent Pool El.
62.6.5
Temporary Pool El:
628 6..:
Clean Out Depth:
6
Sediment Removal E.
620.5'
Bottom Elevation:
621.5."
ATTACH ADDITIONAL SHEETS IF NECESSARY
MAIN POND
Permanent Pool El.
626.5
Temporary Pool El:
628.6
Clean Out Depth:
6.5
Sediment Removal E
620.
Bottom Elevation:
621

Wet Pond Maintenance Requirements
Important operation and 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 pond should be fertilized after the initial fertilization that is required to
establish the plants on the vegetated shelf.
Stable groundcover will be maintained in the drainage area to reduce the sediment load to
the wet pond.
If the pond must be drained for an emergency or to perform maintenance, the flushing of
sediment through the emergency drain will be minimized as much as possible.
At least once annually, a dam safety expert will inspect the embankment. Any problems
that are found will be repaired immediately.
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.
After the wet pond is established, it will be inspected quarterly 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 shall be kept in a known set location and shall be available upon request.
ispection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element:
Potential problem:
How to remediate the problem:
The entire wet pond
Trash/debris is present.
Remove the trash/debris.
Areas of bare soil
Regrade the soil if necessary to remove the gully, plant
The perimeter of the
and/or erosive gullies
ground cover and water until it is established. Provide
wet pond
have formed.
lime and a one-time fertilizer application.
The inlet pipe is clogged
Unclog the pipe. Dispose of the sediment off -site.
(if applicable).
The inlet pipe is
cracked or otherwise
Repair or replace the pipe.
The inlet device
damaged (if applicable).
Erosion is occurring in
Regrade the swale if necessary and provide erosion
the swale (if
control devices such as reinforced turf matting or riprap
applicable).
to avoid future problems with erosion.
Sediment has
Search for the source of the sediment and remedy the
accumulated to a depth
problem if possible. Remove the sediment and dispose
greater than the original
of it in a location where it will not cause impacts to
design depth for
streams or the SCM.
sediment storage.
The forebay
Provide additional erosion protection such as reinforced
Erosion has occurred.
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.

Wet Pond Maintenance Requirements (Continued)
SCM element:
Potential problem:
How to remediate the problem:
Sediment has
Search for the source of the sediment and remedy the
accumulated to a depth
problem if possible. Remove the sediment and dispose
greater than the original
of it in a location where it will not cause impacts to
design sediment
streams or the SCM.
storage depth.
The main treatment
Algal growth covers
Consult a professional to remove and control the algal
area
over 50% of the area.
growth.
Cattails, phragmites or
other invasive plants
Remove the plants by wiping them with pesticide (do not
cover 50% of the basin
spray).
surface.
Best professional
practices show that
pruning is needed to
Prune according to best professional practices.
maintain optimal plant
health.
The vegetated shelf
Determine the source of the problem: soils, hydrology,
Plants are dead,
disease, etc. Remedy the problem and replace plants.
diseased or dying.
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.
Shrubs have started to
grow on the
Remove shrubs immediately.
embankment.
Consult a professional to remove muskrats or beavers
beaver activity is
and repair any holes or erosion.
grow on the
Consult a dam safety specialist to remove the tree.
The embankment
An annual inspection by
an appropriate
professional shows that
Make all needed repairs immediately.
the embankment needs
repair.
Clean out the outlet device and dispose of any sediment
Clogging has occurred.
in a location where it will not cause impacts to streams or
The outlet device
the SCM.
The outlet device is
Repair or replace the outlet device.
damaged.
trees are growing on the
Remove the weeds or trees.
Floating wetland
island (if applicable)
The anchor cable is
damaged, disconnected
Restore the anchor cable to its design state.
or missing.

Wet Pond Maintenance Requirements (Continued)
SCM element:
Potential problem:
How to remediate the problem:
Erosion or other signs
of damage have
Repair the damage and improve the flow dissipation
occurred at the outlet.
structure.
The receiving water
Discharges from the
wet pond are causing
erosion or
Contact the local NCDEQ Regional Office.
sedimentation in the
receiving water.

WET POND ID
1
Pretreatment No
other than
Has Veg. Filter-, No
Wet Detention Pond Design Summary
Wet Pond Diagram
FOREBAY
Permanent Pool El
626.5
Temporary Pool El:
628.6
Clean Out Depth:
6
Sediment Removal
620.5
Bottom Elevation:
621.5
MAIN POND
Permanent Pool El
626.5
Temporary Pool El:
628.6
Clean Out Depth:
6.5
Sediment Removal
620
Bottom Elevation:
621
ATTACH ADDITIONAL SHEETS IF NECESSARY

Stormwater Wetland Maintenance Requirements
Important operation and maintenance procedures:
Immediately following construction of the stormwater wetland, conduct bi-weekly inspections and water wetland plants bi-
weekly until vegetation becomes established (commonly six weeks).
Before and immediately after plant installation, monitor water level and adjust to ensure that plants are not completely
inundated.
No portion of the stormwater wetland will be fertilized after the initial fertilization that is required to establish the wetland
plants.
- Stable groundcover will be maintained in the drainage area to reduce the sediment load to the wetland.
At least once annually, a dam safety expert will inspect the embankment. Any problems that are found will be repaired
immediately.
r the wetland is established, it shall be inspectfdarterly and within 24 hours after every storm event greater than 1.0 inches (o
inches if in a Coastal County.) Records of operation and maintenance shall be kept in a known set location and shall be available
request.
Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately.
SCM element:
Potential problem:
How I will remediate the problem:
The entire wetland
Trash/debris is present.
Remove the trash/debris.
The perimeter of the wetland
Areas of bare soil and/or erosh
Regrade the soil if necessary to remove the gully, plant ground cover an
gullies have formed.
water until it is established. Provide lime and a one-time fertilizer applic
The inlet pipe is clogged (if
Unclog the pipe. Dispose of the sediment off -site.
applicable).
The inlet pipe is cracked or
otherwise damaged (if
Repair or replace the pipe.
The inlet device
applicable).
Erosion is occurring in the
Regrade the swale if necessary and provide erosion control devices suc
swale (if applicable).
reinforced turf matting or riprap to avoid future problems with erosion.
Sediment has accumulated in
the forebay to a depth of less
Search for the source of the sediment and remedy the problem if possibl
than 15' or that inhibits the
Remove the sediment and dispose of it in a location where it will not caw
forebay from functioning well.
impacts to streams or the SCM.
The forebay
Erosion has occurred.
Provide additional erosion protection such as reinforced turf matting or ri
if needed to prevent future erosion problems.
Weeds are present.
Remove the weeds, preferably by hand. If pesticide is used, wipe it on t
plants rather than spraying.
ion.
as

Stormwater Wetland Maintenance Requirements (Continued)
SCM element:
Potential problem:
How I will remediate the problem:
A tree has started to grow on tl
If the tree is <6" in diameter, remove the tree. If the tree is >6" in diamet
embankment.
consult a dam safety specialist to remove the tree.
An annual inspection by an
Embankment
appropriate professional show
that the embankment needs
Make all needed repairs immediately.
repair.
Evidence of muskrat or beaver
Consult a professional to remove muskrats or beavers and repair any ho
activity is present.
erosion.
Algal growth covers over 30%
the deep pool and shallow wati.Consult
a professional to remove and control the algal growth.
areas.
Cattails, phragmites or other
invasive plants cover 30% oft
(Remove the plants by hand or by wiping them with pesticide (do not spr
deep pool and shallow water
consult a professional.
areas.
The temporary inundation zon
remains flooded more than 5
Unclog the outlet device immediately.
days after a storm event.
Deep pool, shallow water an
shallow land areas
Determine the source of the problem: soils, hydrology, disease, etc. Re
Plants are dead, diseased or
the problem and replace plants. Provide a one-time fertilizer application
dying.
establish the ground cover if necessary.
Best professional practices
show that pruning is needed to
Prune according to best professional practices.
maintain optimal plant health.
Sediment has accumulated an
reduced the depth to 75% of th
Search for the source of the sediment and remedy the problem if possibl
original design depth of the
Remove the sediment and dispose of it in a location where it will not caw
deep pools.
impacts to streams or the SCM.
Sediment has accumulated an
earch for the source of the sediment and remedy the problem if possibl
Micropool
reduced the depth to 75% of th
ERemove the sediment and dispose of it in a location where it will not cau
original design depth.
impacts to streams or the SCM.
Clogging has occurred.
gg g
Clean out the outlet device. Dispose of the sediment in a location where
not cause impacts to streams or the SCM.
The outlet device
The outlet device is damaged
Repair or replace the outlet device.
0

Stormwater Wetland Maintenance Requirements (Continued)
SCM element:
Potential problem:
How I will remediate the problem:
Erosion or other signs of
damage have occurred at the
Repair the damage and improve the flow dissipation structure.
outlet.
The receiving water
Discharges from the wetland
are causing erosion or
Contact the local NCDEQ Regional Office.
sedimentation in the receiving
water.