Lower Columbia Slough Refugia Engineered Log Jams

Mason Flats Wetland Enhancement Project

Construction completed in spring 2013

Columbia Slough Confluence Habitat Enhancement Project

Restoration at the Willamette River - Columbia Slough confluence

Big Four Corners Land Acquisition

Protection and restoration of Portland's fourth largest natural area

Columbia Slough Watershed Council

Learn about the Council's activities in the Columbia Slough watershed.

Clean Rivers Education

Learn about Environmental Services education programs.

Watershed Revegetation Program

Read about Portland's program to remove invasive, non-native plants and restore native vegetation.