SW6211101_Plansheet C18 - Misc. Detail_20211130

Important maintenance piroceduires:
The drainage area to the vegetated conveyance or vegetated receiving area will be carefully managed
to reduce the sediment load to the vegetated conveyance or vegetated receiving area.
After the initiall feirtifization to establish the grass in the vegetated conveyance or the vegetated receiving
area, fertilizer will not be applied to the vegetated receiving areas.
The vegetated conveyance or vegetated receiving area will be inspected quarterly. Records of operation and
maintenance will be kept in a known set location and will 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:
Vegetation
Vegetation is too short or
Maintain grassed vegetation such that the swale or vegetated
too long.
area does not erode during the peak flow from the 1 0-year storm
Trash/debris is present.
Remove the trash/debris.
Areas of are soil and/or
egrade the soil if necessaryto remove the gully, and then re -
erosive glullies have
sod or plant with other appropriate species) and water until
Vegetated receiving
formed.
established. Provide lime and a one-time fertilizer application.
areas
Trees and/or other woody
Remove the trees and woody vegetation from the swale, regrade
vegetation are present in
the swale if necessary and re-establish grass as shown on the
the swale.
approved plans.
Trash/debris is present.
Remove the trash/debr,is.
Areas of bare soil and/or
Degrade the soil if necessary to remove the gully, and then re -
erosive gullies have
sod (or plant with other appropriate species) and water until
formed.,
established, IProvlide lime and) a one-time fertilizer application.
Sedliment covers the grass
Remove sedliment and dispose in an area that will not impact
Vegetated conveyances
at the bottom of the sw6le.
streams or SCMs. Re -sod if necessary,
swales / Iroadsliide ditches
(other than curb outlet
The side slope is steeper
Regrade the slopes to the permitted configuration per the
swales)
than the approved
approved plan and reestablish vegetation. If as -built or existing
configuration.
conditions do not allow the slopes to be iregiraded, contact the
applicable permittiingl agency.
Grass is dead, diseased or
Determine the source of the problem: soils, hydrology„ disease,
dying.
etc. Remedy the problem and replace plants, Provide a one-time
fertilizer application to establish the ground cover if necessary.
Trees and/or other woody
Remove the trees and woody vegetation from, the vegetated
vegetation are present in
conveyance, regrade the vegetated conveyance if necessary and
the vegetated conveyance.
re-establish grass as shown on the approved plans.
Clogging has occurred.
Clean out the outlet device Dispose, of the sediment off -site.
The outlet device (if
applicable)
The outlet device is
Repair or replace the outlet device.
damaged
Erosion or other signs of
damage have occurred at
Repair the damage and improve the flow dissipation structure.
the outlet.
Discharges from the site
The receiving water
are causing erosion or
sedimentation in the
Contact the local NCDEQ Regional Office.
receiving water.
Important operation and maintenance �procedures'.
- The drainage area will be mianaged to reduce the sediment load to the dry pond.
Immediately after the dry pond is established, the vegetation will be watered twice weekly if needed until
the plants become established (commonly six weeks).
After the initial fertilization to establish vegetation in the dry Iponid, fertilizer willl not be applied to the dlry
pond.
The vegetation in and around the basin will be maintained at a height of approximately six finches.
At least onceannually, a dam safety expertwfll inspect the eirribainkment. Any problems that are, found
will be repaired immediately.
After the dry pond its established, it shall 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 Ibe kept iln 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 rernediate the problem:
The entire SCM
Trash/debris is, present.
Remove the trash/debris.
Areas of bare soil and/'or
Degrade the soil if necessary to remove the gully, plant ground
The Iperimeter of the SCM
erosive gullies have
cover and water until it is established. Provide lime and a one-
formedA .
time fertilizer application.
The inlet pipe is clogged (if
U. nclog the pipe. Dispose of the sediment in a location where it
applicable).
will not cause impacts to streams or the SCM.
The inlet pipe is cracked or
The inlet device
otherwise damaged (if
Repair or replace the pipe.
applicable).
Erosion is occurring in the
Regrade the swale if necessary and provide erosion control
swale (if applicabie).
devices such as reinforced turf matting or riprap to avoid future
problems with erosion.
Sediment has accumulated
Search for the source of the sediment and remedy the Iproblem if
to a depth greater than the
possible. Remove the sediment and dispose of it in a location
original design, depth for
where it, will not cause impacts to streams or the SCU
sediment storage.
The forebay
Erosion, has occurred.
Provide additional erosion protection such as reinforced turf
matting or riprap lif 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.
Sediment has accumulated
Search, for the source of the sediment and remedy the pirobleim if
to a depth greater than the
original design depth for
possible. Remove the sediment and dispose of it in a location
�sediment storage.
where lit will not cause impacts to streams or the SCM.
The main treatment area
Water is standing more
Check the outlet structure for clogging. If it is a design issue,
than 5 days after a storm
consult an appropriate professional.
event.
Weeds and noxious plants
Remove the weeds, preferably by hand. If pesticide is used, wipe
treatment area.,
it on the plants rather than spraying.
SCM element:
Potential problem:
How to remediate the problem:
Shrubs have started to
Remove shrubs iilmlmediately..
grow on the embankment.
Evidence of muskrat or
Consult a professional to remove muskrats or beavers and repair
beaver activity is present.
any holes or erosion.
A tree has started to grow
Consult a dam safety specialist to remove the tree.
The embankment
on the embankment.
An annual inspection by an
appropriate professional
Make all needed repairs immediately
shows that the
embankment needs repair.
Clogging has occurred.
Clean out the outlet device. Dispose of the sediment in a location
where it will not cause impacts to streams or the SCI
The outlet device
The outlet, device is
Repair or replace the, outlet device.
damaged
�Erosion or other signs of
damage have occurred at
Repair the damage and improve the flow dissipation structure.
the outlet.
Discharges from the dry
The receiving water
pond are causing erosion
Contact the local NCDEQ Regional Office.
or sedimentation in the
receiving water
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C18
FOR AGENCY REVI EW 11 - 10-2021
FILE: