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Creator
- Izaak Walton League of America 4
- Oregon Journal (Firm) 1
- Oregonian (Firm) 1
Topic
- Rivers--Oregon 4
- Dams 3
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- Flood control 2
- Salmon 2
- Izaak Walton League of America 1
- Sewage disposal plants 1
- Water--Pollution 1
Region
- Columbia River >> Clatsop County >> Oregon >> United States 4
- Willamette River >> Multnomah County >> Oregon >> United States 4
- Portland >> Washington County >> Oregon >> United States 1
- Rogue River >> Curry County >> Oregon >> United States 1
- Tillamook >> Tillamook County >> Oregon >> United States 1
