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Topic
- Hydroelectric power plants 5
- Rivers--Oregon 5
- Dams 4
- Power-plants 3
- Fishways 2
- Salmon 1
Region
- Willamette River >> Multnomah County >> Oregon >> United States 5
- Lane County >> Oregon >> United States 2
- Linn County >> Oregon >> United States 2
- McKenzie River >> Lane County >> Oregon >> United States 2
- Clackamas County >> Oregon >> United States 1
- Clackamas River >> Clackamas County >> Oregon >> United States 1
- Leaburg Power Plant >> Lane County >> Oregon >> United States 1
- Lebanon >> Linn County >> Oregon >> United States 1
- Lebanon Dam >> Linn County >> Oregon >> United States 1
- River Mill Dam >> Clackamas County >> Oregon >> United States 1
Decade
- 1930-1939 5
