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Creator
- Izaak Walton League of America 7
- Oregon Journal (Firm) 2
- Oregonian (Firm) 2
Topic
- Rivers--Oregon 7
- Dams 4
- Fishes--Conservation 3
- Izaak Walton League of America 3
- Salmon 3
- Water--Pollution 3
- Flood control 2
- Algae 1
- Hunting 1
- Sewage disposal plants 1
Region
- Columbia River >> Clatsop County >> Oregon >> United States 6
- Willamette River >> Multnomah County >> Oregon >> United States 4
- Rogue River >> Curry County >> Oregon >> United States 2
- Portland >> Washington County >> Oregon >> United States 1
- Tillamook >> Tillamook County >> Oregon >> United States 1
