Vanir provided the owner extensive pre-construction services, as well as full construction phase CM and Inspection services. The QA/QC coverage included the construction site on land and underwater, as well as several offsite locations where components and pipes were fabricated and coated.
The program aimed to provide northern King County and southern Snohomish County with a new state-of-the-art 36 million gallon per day tertiary treatment plant. Effluent from the plant is treated inland and then conveyed via 12 miles of tunnels to the shore of Puget Sound where it enters the outfall and then discharges a mile offshore. The journey is a total length of 13 miles.
The $29.8 million design/build was completed 22.5 months before the contracted completion date and $8 million under budget.