Alder Creek Restoration Project

Case Study
Case Study
Case Study
Case Study

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).

This Project will benefit:

Salmonids, including

  • Upper Willamette River (UWR) spring-run Chinook salmon (Onchorhynchus tshawytscha)
  • Lower Columbia River (LCR) Chinook salmon, LCR steelhead (Onchorhynchus mykiss)
  • UWR steelhead, and LCR coho salmon (O. kisutch)

Pacific Lamprey (Lampetra tridentate)

Bald Eagle (Haliaeetus leucocephalus)

Osprey (Pandion haliaetus)

Mink (Mustela vison)

The project will also benefit a diverse array of other aquatic and terrestrial species that reside either permanently or temporarily within the Willamette and Columbia Rivers of the Pacific Northwest.

Project details:

The 52.3-acre Project includes approximately 32 waterfront acres south (waterward) of the Sauvie Island Drainage Improvement Company (SIDIC) levee and approximately 20 acres north (landward) of the SIDIC levee.

The Project design includes 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.

Click images to enlarge.

Habitat improvements:

This Project has been designed so that its implementation will restore and improve habitats that:

  • Restore natural hydrology
  • Restore floodplain function, including off-channel habitat for multiple species
  • Re-establish floodplain and riparian plant communities
  • Improve aquatic and riparian habitat conditions
  • Improve river margin habitat complexity

Project tasks to achieve habitat restoration and enhancement:

  • Industrial Sawmill Removal
  • Invasive Species Control and Native Re-vegetation
  • Side Channel Habitat Restoration
  • Marsh/mudflat Habitat Restoration
  • Habitat Complexity Improvement
  • Hydrologic Reconnection
  • Riparian Forest Restoration
  • Upland Forest Establishment
  • Permanent Protection of Conservation Values
  • Long-term Stewardship

Demolition of the sawmill was completed in spring 2014. Habitat construction is scheduled to begin in summer 2014. Any in-water construction work will occur within the designated in-water work window in order to minimize potential impacts.

Purchasing credits:

Wildlands is proud to offer this innovative solution to the industries and governments that are in need of habitat restoration to fulfill their obligation to restore natural resources in Portland Harbor.

If you are interested in reserving or purchasing credits, please contact:

Need Credits?
Contact Julie Mentzer at 503-241-4895, ext. 2 or


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