City of Tacoma GISOver a century of industrial practices left sediments heavily contaminated in the Thea Foss and the City, in collaboration with various agencies, organizations, property owners, took action to remove or cap these pollutants, transforming the marine habitats around the waterway. The remedial action construction was completed in 2006 under a Superfund Consent Decree (CD) issued by the U.S. EPA. This layer shows these remedial actions which included no action, natural recovery, enhanced natural recovery, dredged to clean, dredged and backfilled, and capping. The St. Paul Waterway Confined Disposal Facility (CDF) was also constructed as part of the remedy to contain the material dredged from the waterways. See Thea Foss Waterway Cleanup City of Tacoma for additional information on the remedial actions. The City of Tacoma Institutional Controls Plan (ICP) for the Thea Foss and Wheeler-Osgood Waterways Remediation Project ( Institutional-Controls-Plan_2006.pdf ) aims to protect these remedial actions in perpetuity for the purpose of protecting water quality for marine organisms and human health. This static layer was created per Section D.1.2.4 of the ICP to display these historical remedial action areas for permitting purposes for City staff and the public. Contact: Environmental Programs Group; Thea Foss and Wheeler Osgood Waterway Superfund Program. Laura Nokes, Engineering Project Manager. lnokes@tacoma.govArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/e18759ef3ed84113a4b5f963aed8d9ef_0engTacoma Open DataPublicFoss Waterway Superfund Remedial Action Areas (Tacoma) [Washington (State)--Tacoma]Web servicesWashington (State)--TacomaWashington (State)Last Modified: 2025-12-13