Nature-Based Solutions Case Study

Clackamas River

State/Territory: Oregon

The Clackamas River is a tributary to the Columbia River that has been degraded by beaver removal, logging, mining, overgrazing, and urban development. This disconnected the floodplain from its river and negatively impacted fish populations. This project restored habitat to help threatened and endangered salmonids. This project reconnected over 60 hectares of main-stem floodplain and reconnected and restored 330 meters of tributary habitat, created dynamic and deformable side channel and floodplain habitats for juvenile salmonids, and reclaimed an abandoned gravel mine on the Clackamas River while restoring its confluence with Goose Creek. This enhances recreation opportunities for the entire Portland-metro area.

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Habitat Types

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Inland Wetland Habitats

Strategies

Nature-based strategies examined in this case study.

Floodplain Reconnection

Beaver Management and Beaver Dam Analogs

Stream Restoration

Top Outcomes

Climate threat reduction, ecological benefits, or social & economic benefit goals obtained in this case. Click to search for case studies with similar outcomes.

Increase Habitat Connectivity

Provide Recreational Opportunities

Support Wildlife

Sourcing

Case study originally found at: https://issuu.com/poweroferdc/docs/erdc-sr-21-2_ebook/s/12100947