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- United States. Army. Corps of Engineers 7
Topic
- Bodies of water 7
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- River engineering 7
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- United States--Armed Forces--Organization--Charts, diagrams, etc 7
- United States. Congress--Records and correspondence 7
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Region
- Columbia River >> Douglas County >> Washington >> United States 7
- Oregon >> United States 7
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- Willamette River >> Multnomah County >> Oregon >> United States 7
- Snake River >> Franklin County >> Washington >> United States 6
- Coos Bay >> Coos County >> Oregon >> United States 3
- Yamhill River >> Yamhill County >> Oregon >> United States 2
- Clearwater River >> Nez Perce County >> Idaho >> United States 1
- Coquille River >> Coos County >> Oregon >> United States 1
- Cowlitz River >> Cowlitz County >> Washington >> United States 1
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Type
- Text 7