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Topic
- Northwest, Pacific 50
- River engineering 50
- United States. Congress--Records and correspondence 49
- Rapids 8
- Jetties 6
- Canals 4
- Harbors 2
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- Railroad engineering 1
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Region
- Columbia River >> Douglas County >> Washington >> United States 50
- Willamette River >> Multnomah County >> Oregon >> United States 24
- Oregon >> United States 17
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- Snake River >> Franklin County >> Washington >> United States 3
- Cathlamet Bay >> Clatsop County >> Oregon >> United States 2
- Chehalis River >> Grays Harbor County >> Washington >> United States 2
- Cascade Locks >> Hood River County >> Oregon >> United States 1
- Cowlitz River >> Cowlitz County >> Washington >> United States 1
- Snake River >> British Columbia >> Canada 1
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Type
- Text 48
- Collection 2
Decade
- 1890-1899 50