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- Dams 38
- Rivers--Oregon 38
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- Flood control 8
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Region
- Santiam River >> Marion County >> Oregon >> United States 38
- Willamette River >> Multnomah County >> Oregon >> United States 38
- Marion County >> Oregon >> United States 28
- McKenzie River >> Lane County >> Oregon >> United States 8
- Linn County >> Oregon >> United States 6
- Mill City >> Linn County >> Oregon >> United States 3
- Salem Ditch >> Marion County >> Oregon >> United States 3
- Mayflower Creek >> Marion County >> Oregon >> United States 2
- Columbia River >> Clatsop County >> Oregon >> United States 1
- North Santiam River >> Linn County >> Oregon >> United States 1
Format
- image/tiff 28
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Decade
- 1940-1949 38
