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- Bodies of water 14
- River engineering 14
- River surveys 14
- Rivers 14
- United States. Congress--Records and correspondence 14
- River channels 13
- Harbors 11
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- Northwest, Pacific 7
- United States--Armed Forces--Organization--Charts, diagrams, etc 7
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Region
- Columbia River >> Douglas County >> Washington >> United States 14
- Oregon >> United States 14
- Snake River >> Franklin County >> Washington >> United States 14
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- Willamette River >> Multnomah County >> Oregon >> United States 14
- Coos Bay >> Coos County >> Oregon >> United States 11
- Clearwater River >> Nez Perce County >> Idaho >> United States 5
- Idaho >> United States 5
- California >> United States 4
- Cowlitz River >> Cowlitz County >> Washington >> United States 4
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- 1880-1889 14