North Mercer Island Interceptor and Enatai Interceptor Upgrade

1 Alliance  was contracted to produce a base map for engineering design through preliminary design and final design for the replacement of the North Mercer Island and Enatai sewer pipelines. The project included the design of approximately 16,000 feet of wastewater pipelines from the North Mercer Pump Station on Mercer Island to the Sweyolocken Pump Station in Bellevue.

Increasing sewer capacity will allow King County to provide reliable wastewater service through the year 2060.