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Topic
- Rivers--Oregon 5
- Cities and towns 3
- Bridges 1
- Sewage disposal plants 1
- Water--Pollution 1
Region
- Roseburg >> Douglas County >> Oregon >> United States 5
- Umpqua River >> Douglas County >> Oregon >> United States 4
- Baker City >> Baker County >> Oregon >> United States 1
- Burns >> Harney County >> Oregon >> United States 1
- Grants Pass >> Josephine County >> Oregon >> United States 1
- Medford >> Jackson County >> Oregon >> United States 1
- Portland >> Washington County >> Oregon >> United States 1
- Salem >> Marion County >> Oregon >> United States 1
- Silverton >> Marion County >> Oregon >> United States 1
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- In Copyright 5