Clackamas Wetland and Beaver Habitat Restoration Project

Project Description

Bark’s programmatic partnership with Portland State University and the Forest Service, is funded through the Drinking Watershed Providers Partnership, Wilburforce Foundation, Mazamas and other foundations, and individual support!

  1. Update wetland mapping in the Clackamas drainage through both photo interpretation and field verification
  2. Identify site-suitability for beaver through volunteer data collection effort.
  3. Estimate water storage capacity of individual wetlands through both spatial analysis and measurements in the field.
  4. Prioritize wetlands for future restoration projects and make recommendations, and implement these recommendations when possible.
  5. Increase understanding and appreciation of wetland ecosystems through free trainings, presentations, volunteer opportunities.

What do we mean by wetland mapping? The Cowardin Classification System is used by the National Wetlands Inventory, a program of the US Fish and Wildlife Service, and it’s the standard classification system for wetland mapping across the U.S.  NWI mapping has been completed for most of the United States. But most of the mapping in Oregon occurred in the 1980s or earlier, and was based on pretty low-resolution imagery, so the NWI doesn’t represent the number, types or boundaries of wetlands as they may exist now. Therefore our project on wetland and beaver restoration includes the goal of updating the NWI mapping for our project area. This part of our project is largely being completed with the help of Bark volunteers.

Example of old versus new wetland mapping that was completed in 2020, which will be used to update the National Wetland Inventory database.

In 2019, we developed a volunteer field program to assess and prioritize habitat suitability for beaver, using a scorecard method. We developed this in communication with researchers who have done similar work up in the Methow valley in Washington, as well as more recently on the Gifford Pinchot National Forest. Our scorecard looks at variables like beaver presence (both historic and current), hydrology, vegetation, and topography.

Map of beaver habitat surveys by Bark and volunteers from 2019-2020 within various riparian (water) areas.

You can support this project as a volunteer!

We need your support in our efforts to help beavers return to Mt. Hood.

Sign up for volunteer opportunities or get in touch for other ways to get involved.

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