Maintaining Neighborhood Stormwater Facilities
Stormwater facilities are man-made structures and require maintenance to insure that they function properly over time.
Erosion and Sediment Control
Inlet/Outlet Pipe Inspection
Interested in a free workshop on maintaining your stormwater facility?
Email us at
email@example.com to sign up for the next workshop.
As part of Thurston
County's responsibility to prevent and minimize stormwater pollution,
stormwater facilities must be inspected on an annual basis to ensure
they continue to function properly. Homeowners and private
property owners responsible for the maintenance of a stormwater facility
within Thurston County will receive an
inspection form every
year that must be completed by the property manager and/or owner, and
returned to Water Resources staff at:
2000 Lakeridge Drive SW
Bldg 4, Room 100
Olympia, WA 98502
Additionally, Thurston County Resource Stewardship staff inspects private and commercial stormwater facilities on an annual basis to ensure they are functioning properly. If any deficiencies are found, a report is sent to the responsible party with details on how to repair the problems(s). Within 30 days of receiving the report, property owners are required to return an enclosed inspection form stating that they either corrected the deficiencies, or plan to correct them at a specified point in the future.
Need to hire a contractor for your stormwater facility management needs?
Check Thurston County's list of stormwater-related contractors to find a company that may be able to help you complete necessary maintenance on privately-owned (neighborhood) stormwater facilities.
Thurston County Water Resources staff recommends maintaining cattail populations in wet ponds at or below 25% coverage of the total wet pond area. This is because cattail coverage over this amount can reduce the designed holding capacity of a pond and restrict flow in and out of the pond.
To control cattail in a wet pond, individual plants and their entire root system can be pulled out by hand. This method is typically more successful where the plants are less deeply rooted in the looser soil in the middle of a pond than on the edges. If removing cattail by hand is not practicable, cattail can be cut below the water line and all cuttings removed from the area. The rhizomes (roots) of cattail plants that are continuously submerged at least three (3) inches below the water line will eventually die, although multiple cuttings in one year may be necessary to achieve success.
For small infestations, the entire plant and as much of the root system as possible should be removed from the area, as remaining roots can re-sprout. The area should be monitored for several years to remove seedlings as they sprout. For larger infestations, mechanical removal with the use of brush cutters, tractor-mounted mowers, or backhoes should be done when the plants are drought stressed (July through September) to achieve maximum mortality.
|Annual bugloss||Common bugloss|
|Common reed (Phragmites)||English ivy|
|Field bindweed||Garden loosestrife|
|Giant hogweed||Himalayan blackberry|
|Knotweeds||Old man's beard|
|Poison oak||Purple loosestrife|
|Reed canarygrass||Scotch broom|
|Tansy ragwort||Western water hemlock|
|Wild chervil||Yellow flag iris|
Staff contact: Cathe Linn: (360) 867-2095. E-mail: firstname.lastname@example.org
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