Mitigation Projects

Alder Creek Restoration Project

The Alder Creek Restoration Project is an aquatic, riparian, and upland forest restoration and enhancement project developed in coordination with the Portland Harbor Natural Resource Trustee Council. The habitat values provided by this Project can be used to offset Natural Resource Damages (NRD) resulting from past industrial use along the Willamette River in Portland, Oregon.

The Project is located on a 52.3-acre property on the southern tip of Sauvie Island, at the divergence of the Willamette River and Multnomah Channel, approximately 10 miles north of downtown Portland, and within the northern extent of the Portland Harbor Study Area (NOAA 2012).

The Project design included dismantling the sawmill complex and then restoring the site to a mosaic of side channel, mud flat, beach, emergent marsh, riparian scrub-shrub, riparian forest, and upland forest habitats.

The Project's created, enhanced, and protected habitats will benefit fish and wildlife resources in the Lower Willamette River, an area that has experienced significant degradation of habitat including channelization, off-channel habitat removal, floodplain removal, silt loading, water temperature increases, and industrial contaminants.

This Project will benefit:

Chinook Salmon
  • Salmonids
  • Pacific Lamprey
  • Bald Eagle
  • Osprey
  • Mink

52.3 acres

Location: Multnomah County, Oregon

Mitigation Types

  • DSAYs

Service Area

Includes the Portland Harbor Superfund Study Area as depicted on the map. The Service Area runs from approximately river mile 1 to river mile 12.2 of the Willamette River and includes the upper mile of Multnomah Channel. The entire Portland Harbor Superfund area, as well as adjacent lands, is included within the Service Area.

Approving Agencies

  • Portland Harbor Natural Resources Trustee Council

For additional information on the Alder Creek Restoration Project, please contact Julie Maddox at (916) 435-3555 or