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- Fishways 7
- Rivers--Oregon 7
- Dams 6
- Flumes 1
- Hydroelectric power plants 1
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- Clackamas County >> Oregon >> United States 7
- Willamette River >> Multnomah County >> Oregon >> United States 6
- Clackamas River >> Clackamas County >> Oregon >> United States 5
- River Mill Dam >> Clackamas County >> Oregon >> United States 3
- Marmot Dam (historical) >> Clackamas County >> Oregon >> United States 1
- Sandy River >> Multnomah County >> Oregon >> United States 1
- Tualatin >> Washington County >> Oregon >> United States 1
- Tualatin River >> Clackamas County >> Oregon >> United States 1
