Harbor Pacific Contractors, Inc, Construction Services in the Pacific Northwest
Tulalip Tribes Quil Ceda WWTP - Marysville, Washington
Engineer: Parametrix
Harbor Pacific Contractors, Inc.
Harbor Pacific Contractors, Inc.
Harbor Pacific Contractors, Inc.
Harbor Pacific Contractors, Inc.
Tulalip Tribes Quil Ceda WWTP Facility

Construction of a new wastewater treatment facility for the Tulalip Tribes in Marysville, Washington. The plant is designed around a membrane bio-reactor (MBR) filter system which enables the plant to treat significantly larger volumes of influent (untreated wastewater) in a smaller area.

The MBR utilizes a very fine screen to filter solids out while allowing the supernatant (water less solids) through. The aeration process occurs simultaneously. The treated effluent is then disinfected, pumped and discharged into to the surrounding fields.

Construction included a new headworks structure, MBR filter structure with pipe gallery, an effluent pump station with UV disinfection and an emergency power system which allows the plant to operate during power outages.


Harbor Pacific Contractors, Inc.
19628 144th Avenue NE, Suite A, Woodinville, Washington 98072
phone 425.488.7131 - fax 425.489.3991
www.harborpacific.com -