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Maintenance Inspections Home

Drainage System Maintenance Service Contractors  (PDF File)
Diagram of a Typical Drainage System  (PDF File)
Using a Contractor for Maintenance
Questions & Answers About Maintenance Inspections
How to Maintain Drainage Structures



Services > Drainage & Sewer > Drainage System Information & Inspections > Maintenance Inspections

Using a Contractor for Maintenance

Finding a contractor
Refer to our List of Drainage System Contractors (see link below). Most maintain, clean and install components, and install oil absorbent booms and cushions.


This is not an all-inclusive list of contractors; these can be found in the Yellow Pages under "Sewer/Drainage Contractors." This list is provided for your convenience. Seattle Public Utilities cannot recommend any private contractor.

Getting competitive bids
It is wise to get at least three bids. This is a competitive field and it is often possible to realize substantial savings by soliciting competitive bids.


When requesting service from a contractor, provide the contractor with a copy of the Seattle Public Utilities inspection report and site map sent to you after the inspection. The information it contains will save time and make it easier for the contractor to prepare an accurate bid estimate. Contractors can contact Seattle Public Utilities if they have questions.

Re-inspecting when work is complete
Please notify the Seattle Public Utilities inspector when the work has been completed, so that if the contractor’s work is deficient, this fact can be discovered during the re-inspection and before the contractor is paid.


If the maintenance work has been completed correctly, the inspector will send a sign-off letter to you, noting that your stormwater drainage system is in compliance with city standards for maintenance.

Related Links
Questions and Answers About Maintenance Inspections
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For detail on what to expect during an inspection.
Using a Contractor for Maintenance

List of Drainage System Contractors
(PDF)
Pollution Control Inspections
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To help businesses keep pollutants out of their stormwater runoff.