Private Stormwater System Inspection Program
The City of SeaTac Public Works Department conducts annual to semi-annual inspections of commercial and multifamily private stormwater systems to ensure stormwater facilities are being maintained and functioning properly. Private stormwater systems can include detention, flow control and water quality treatment facilities, which reduce peak stormwater flows and capture pollutants carried by stormwater. So, proper maintenance of these facilities is necessary to protect our downstream waterways from flooding and water quality impacts, as well as to comply with federal and state regulations.
Inspections are usually conducted in late winter to early spring of each year. Property owners are notified a minimum of one week in advance of these inspections.
Frequently Asked Questions (FAQs)
Q: Why can’t I sign up for vactor cleaning services like I did last year?
A: That program is no longer offered, because the City no longer contracts for vactor cleaning service of the municipal stormwater system. Maintenance of the City storm system is now done in house. For your convenience, inspection staff will provide a list of vendors who provide this service, if maintenance of your private storm system is required.
Q: Why do I have to provide access to my property for storm system inspections?
A: If you don’t want to allow access to your property, you have the option of hiring a qualified third party consultant who is trained to conduct stormwater system inspections to the standards of the 2009 King County Surface Water Design Manual. City staff will provide a list of vendors that provide this service. [Please note: If you chose this option, you will be paying the vendor for an inspection service the City provides for free.]
Q: Why do stormwater inspections need to be done?
A: The City conducts annual to semi-annual inspections of commercial and multifamily private drainage systems to ensure stormwater facilities are being maintained and functioning properly. This is done in an effort protect our downstream waterways from flooding and water quality impacts, as well as to comply with federal and state regulations. [Please note: Pursuant to sections 12.10.170 and 12.10.010 of the SeaTac Municipal Code, property owners are responsible for the maintenance and repair of the storm water facility on their property.]
Q: How do I qualify/apply for a rebate on my stormwater fees?
A: Pursuant to SeaTac Municipal Code 12.10.225.E, nonresidential properties which contain one or more retention/detention facilities, or equivalent, which are designed, engineered, and maintained to the standards of the King County Surface Water Design Manual are entitled to a rebate equal to twenty-five percent (25%) of the annual surface water management fee for the acreage served by each facility. If your property qualifies for the above stormwater fee rebate and your stormwater facility inspection has been approved, please complete and submit a SWM Fee Rebate Request Form to:
City of SeaTac Public Works
4800 South 188th Street
SeaTac, WA 98188
Attn: Request for SWM Rebate