HomeMy WebLinkAboutAgreement APPLICANT 1/14/2013 • •
Private Stormwater Management and Treatment System
Operations and Maintenance Plan
Required per Development Agreement
In order to meet requirements of the City of Springfield MS4 Stormwater Discharge
Permit the City has implemented several policies requiring private property owners to install and
maintain facilities that manage and treat stormwater runoff before discharge to the public
stormwater system.
(Property Owner/Developer) acknowledge and agree to
maintain stormwater treatment facilities listed in this document. The maintenance of the •
stormwater facilities listed in this document is required as part of the development agreement
required by the City of Springfield. This facility will be operated and maintained in accordance
with the requirements stated in this document and in the latest edition of the City of Springfield
Engineering Design Standards and Procedures. As part of the required maintenance of the
facility the city reserves the right to inspect any stormwater facilities to ensure the facilities are
operating at a satisfactory level. Failure to inspect and maintain the facilities can result in an
unacceptable impact to the public stormwater system and receiving waters.
The requirement to operate and maintain the stormwater treatment facilities in accordance with
the approved site development agreement is binding on all current and future owners of the
property. This plan may be modified under written consent of both the property owners and the
City of Springfield. For any questions regarding this plan, maintenance agreement and
development agreement refer to the Public Works/Development Services front desk at 225 Fifth
St, Springfield Oregon or call (541)-736-3753.
Description of Property
Subject to agreement
(Legal Address/Taxlot):
Development Agreement: TYP 212-00036 Buffalo Wild Wings
Responsible Party:
Date Received: I I I (/,]
Planner: LM
By signing below, the signer accepts and agrees to the terms and conditions contained in the
operations and maintenance plan and in any documents attached.
Owner(s):
Signature Print Name
STATE OF OREGON, County of Lane,
This instrument as acknowledged before me this day of
By , owners of the above described premises.
Notary Public for Oregon
My Commission Expires
Date Received: 1 / I [ 13
q
Planner: LM
Private Stormwater Management and Treatment System
Operations and Maintenance Plan
Specific Site facilities Requirements
List of Stormwater Treatment Drop in Catch Basin Filters
Facilities covered under this agreement: Stormwater Swales •
Facilities and Maintenance List:
Drop in Catch Basin Filters
Required Maintenance:
• Inspect and remove debris/clean catch-basin if necessary every 6 months or per manufacturers
recommended schedule
• Replace filter according to manufacturers schedule
Date Received.
I 43
Planner: LM
• •
Swales(Vegetated,Grassy,and Street)
Operations & Maintenance Plan
Swales are vegetated or grassed open channels that trap pollutants by filtering and slowing flows, allowing
particles to settle out. The swale should drain within 48 hours of a storm event. All facility components,
vegetation, and source controls shall be inspected for proper operations and structural stability, at a minimum,
quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after
each major storm event. The facility owner must keep a log, recording all inspection dates, observations, and
maintenance activities. The following items shall be inspected and maintained as stated:
Swale Inlet(such as curb cuts or pipes) shall maintain a calm flow of water entering the swale.
• Source of erosion shall be identified and controlled when native soil is exposed or erosion channels are
forming.
• Sediment accumulation shall be hand-removed with minimum damage to vegetation using proper
erosion control measures. Sediment shall be removed if it is more than 3" thick or so thick as to damage
or kill vegetation.
• Inlet shall be cleared when conveyance capacity is plugged. Sources of sediment and debris shall be
identified and corrected.
• Rock splash pads, spreaders and dissipaters shall be replenished to prevent erosion.
Side Slopes shall be maintained to prevent erosion that introduces sediment into the swale.
• Slopes shall be stabilized and planted using appropriate erosion control measures when native soil is
exposed or erosion channels are forming.
Swale Media shall allow stormwater to percolate uniformly through the landscape swale. If the swale does not
drain within 48 hours, it shall be tilled and replanted according to design specifications.
• Swale area shall be protected during construction from compaction.
• Annual or semi-annual tilling shall be implemented if compaction or clogging continues.
• Debris in quantities that inhibit operation shall be removed routinely(e.g., no less than quarterly), or
upon discovery.
Swale Outlet shall maintain sheet flow of water exiting swale unless a collection drain is used. Source of
erosion damage shall be identified and controlled when native soil is exposed or erosion channels are forming.
• Outlets such as drains and overland flow paths shall be cleared when 50% of the conveyance capacity is
plugged.
• Outlet structures shall be cleaned of sediment and debris at least 1 time per year or when the level is at
50% of the conveyance capacity.
• Sources of sediment and debris shall be identified and corrected.
Vegetation shall be healthy and dense enough to provide filtering while protecting underlying soils from
erosion. Mulch shall be replenished as needed to ensure survival of vegetation.
• Vegetation, large shrubs or trees that interfere with landscape swale operation shall be pruned.
44 • Fallen leaves and debris from deciduous plant foliage shall be removed if build up is damaging
vegetation.
• Grassy swales shall be mowed to keep grass 4"to 9" in height. Clippings shall be removed when
possible,to remove pollutants absorbed in grasses, or when build up is damaging vegetation.
• Nuisance and prohibited vegetation (such as blackberries and English Ivy) shall be removed when
discovered. Invasive vegetation contributing up to 25% of vegetation of all species shall be removed and
replaced.
i6 • Dead vegetation and woody material shall be removed to maintain less than 10%of area coverage or
8- when swale function is impaired. Vegetation shall be replaced within 3 months,or immediately if
Cr required to maintain cover density and control erosion where soils are exposed.
fp e Debris and Litter shall be removed to ensure stormwater conveyance and to prevent clogging of inlet and
t R outlet drains and interference with plant growth.
Spill Prevention measures shall be exercised when handling substances that contaminate stormwater. Releases
of pollutants shall be corrected as soon as identified.
Training and/or written guidance information for operating and maintaining swales shall be provided to all
property owners and.tenants. A copy of the O&M Plan shall be provided to all property owners and tenants.
Access to the swale shall be safe and efficient. Egress and ingress routes shall be maintained to design
standards. Roadways shall be maintained to accommodate size and weight of vehicles, if applicable.
• •
Swales (Vegetated, Grassy,and Street)
Operations & Maintenance Plan
• Obstacles preventing maintenance personnel and/or equipment access to the swale shall be removed.
• Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic.
Insects & Rodents shall not be harbored in the swale. Pest control measures shall be taken when
insects/rodents are found to be present.
• If a complaint is received or an inspection reveals that a stormwater facility is significantly infested
with mosquitoes or other vectors, the property owner/owners or their designee may be required to
eliminate the infestation at the City inspector's discretion. Control of the infestation shall be attempted
by using first non-chemical methods and secondly, only those chemical methods specifically approved
by the City's inspector. Acceptable methods include but are not limited to the following:
i. Installation of predacious bird or bat nesting boxes.
ii. Alterations of pond water levels approximately every four days in order to disrupt mosquito
larval development cycles.
iii. Stocking ponds and other permanent water facilities with fish or other predatory species.
iv. If non-chemical methods have proved unsuccessful, contact the City inspector prior to use of
chemical methods such as the mosquito larvicides Bacillus thurengensis var. israeliensis or other
approved larvacides. These materials may only be used with City inspector approval if evidence
can be provided that these materials will not migrate off-site or enter the public stormwater
system. Chemical larvicides shall be applied by a licensed individual or contractor.
• Holes in the ground located in and around the swale shall be filled.
If used at this site, the following will be applicable:
Check Dams,flow spreaders and dissipaters shall control and distribute flow.
• ,Causes for altered water flow or short circuits shall be identified, and obstructions cleared upon
discovery.
• Causes for channelization shall be identified and repaired.
• Systems shall remain free of sediment build up and debris.
I I 'I 13
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Date Received. ---1---
Planner: LM