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- United States--Appropriations and expenditures 2
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- Portland >> Clackamas County >> Oregon >> United States 2
- Siuslaw River >> Lane County >> Oregon >> United States 2
- Canoe Encampment Rapids (historical) >> Morrow County >> Oregon >> United States 1
- Celilo Canal >> Wasco County >> Oregon >> United States 1
- Celilo Falls (historical) >> Wasco County >> Oregon >> United States 1
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- Clatskanie River >> Columbia County >> Oregon >> United States 1
- Columbia River >> Clatsop County >> Oregon >> United States 1
- Coquille River >> Coos County >> Oregon >> United States 1
- Corvallis >> Benton County >> Oregon >> United States 1
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