Green River Filtration Facility

(King County, WA)  Landau Associates provided natural resources and geotechnical engineering services as a subconsultant for Tacoma Water’s ~ $210 million Green River Filtration Facility in King County, Washington. Natural resources services included delineating two streams and two wetlands on the site, working closely with the engineering design team to ensure critical areas were minimally disturbed, and coordinating all permitting with regulatory agencies, including the King County Department of Permitting and Environmental Review (DPER), Washington State Department of Fish and Wildlife, and US Army Corps of Engineers. 

The project is funded by a Washington State Department of Health (DOH) Drinking Water Revolving Funds grant and required a NEPA-like environmental review process. We prepared all documentation required by DPER, an Expanded SEPA Checklist, Letter of No Effect for Endangered Species in the project area, a wetland and stream delineation and conceptual mitigation plan, and Joint Aquatics Resource Permit Application. In addition, we served as the project point-of-contact with the DOH and DPER, and coordinated the required archaeological and historical review.