20070228 Ver 2_More Info Received_20090630

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Permit Number:
(to be provided by DWQ)
Drainage Area Number.
Filter Strip, Restored Riparian Buffer and Level Spreader
Operation and Maintenance Agreement
(ar CU4. ;or .Qa seaur-
I will keep a maintenance record on this BMP. This maintenance record will 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 defidmwies can affect ft integrity
of structures, safety of the public and the removal efficiency of the BMP.
Important maintenance procedures:
ke
I
- Immediately after the filter strip is established, any newly planted vegetation 7
will be watered twice weekly if needed until the plants become established ^
(commonly six weeks):
- Once a year, the filter strip will be reseeded to maintain a dense growth of
vegetation ;
- Stable groundcover will be maintained in the drainage area to reduce the
sediment load to the vegetation.
- Two to three times a year, grass filter strips will be mowed and the clippings
harvested to promote the growth of thick vegetation with optimum pollutant
4)
removal efficiency. Turf grass should not be cut shorter than 3 to 5 inches and
may be allowed to grow as tall as 12 inches depending on aesthetic requirements
(NIPC,1993). Forested filter strips do not require this type of maintenance.
- Once a year, the soil will be aerated if necessary.
- Once a year, soil pH will be bested and lime will be added if necessary.
After the filter strip is established, it will be inspected quarterly and within 24 hours
after every storm event greater than 1.0 inch (or 1.5 inches if in a Coastal County).
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.
BMP element; Potential vioblein: How I will remediate the problem
The entire filter strip
System Trash/debris is present. Remove the trash/debris.
The flow spllttw device The flow sputter device is Unclog the conveyance and dispose
(if applicable) of arw sediment off-site.
The flow sputter, device is Make any necessary repairs or
damaged. replace if damage is too large for
Farm SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 1 of 3
BMP element: Potential roblem: How I will remediate the problent:
The swale and the level The swale is clogged with Remove the sediment and dispose
lip sediment of it off-site.
The level lip is cracked, Repair or replace lip.
settled, undercut, eroded or
otherwise damaged.
There is erosion around the Regrade the soil to create a berm
end of the level spreader that that is higher than the level lip, and
shows stormwater has then plant a ground cover and
bypassed it water until it is established. Provide
lime and a one-time fertilizer
application.
Trees or shrubs have begun Remove them
to grow on the swale or just
downslo of the level lip.
The bypass channel Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then
reestablish proper erosion control.
Turf reinforcement' is Study the site to see if a larger
damaged or ripap is rolling bypass channel is needed (enlarge if
downhill. necessary). After this, reestablish
the erosion control material.
The filter strip Grass is too short or too long Maintain grass at a height of
if applicable). approximately 'three to six inches.
Areas of bare soil and/or Regrade the soil if necessary to
erosive gullies have formed. remove the gully, and then plant a
ground cover and water until it is
established. Provide lime and a
one-time fertilizer application.
Sediment is building up on Remove the sediment and
the filter strip. restabilize the soil with vegetation if
necessary. Provide Iime and a one-
time fertilizer application.
Plants are desiccated. Provide additional irrigation and
fertilizer as needed.
Plants are dead, diseased or Determine the source of the
dying. problem: soils, hydrology, disease,
etc. Remedy the problem and
replace plants. Provide a one-time
fertilizer a licatiorL
Nuisance vegetation is Remove vegetation by hand if
choking out desirable species. possible. If pesticide is used, do not
allow it to get into the receiving
water.
The receiving water Erosion or.other signs of Contact the NC Division of Water
damage have occurred at the Quality local Regional Office, or the
outlet. 401 Oversight Unit at 919-733-1786.
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 2 of 3
Permit Number:
(to be provided by DWQ)
I acknowledge and agree by my signature below that I am responsible for the
performance of the maintenance procedures listed above. I agree to notify'DWQ of any
problems with the system or prior to any changes to the system or responsible party.
Project name:Middlesex Cortwrate Center Infrastructure Project
BMP drainage area number:See I"eelwSvreader Table-Attached
e
Print name&p= Moore
Title:Assisffint County Manager. Nash County
Address: 120 W. Washint= Street Nashville NC 27856
I, 7"%Qr. ?e_r. F-Vans a'Notary Public for the State of
Maf-?& fat 1 iA4, County of 1441 A aY , do hereby certify that
g& nnee= personally appeared before me this 26-&-
day of _ the;. and acknowledge the due execution of the
forgoing filter strip, riparian buffer, and/or level spreader maintenance requirements.
Witness my hand and official seal,
JAM= ANA
R{lTW "Jun
SEAL
My commission expires 9-18 • Z6IO
Form SWU401-Level Spreader, Filter Strip, Restored Riparian Buffer O&M-Rev.3 Page 3 of 3
Note: The legally responable party should not be a homeowners association unless more than 30% of
the lots have been sold and a resident of the subdivision has been named the pnmdent.
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