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Topic
- United States. Congress--Records and correspondence 15
- River surveys 13
- United States--Appropriations and expenditures 13
- River engineering 10
- Transportation 3
- Bodies of water 2
- Harbors 2
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- Rivers 2
- West (U.S.) 2
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Region
- Portland >> Clackamas County >> Oregon >> United States 9
- Willamette River >> Multnomah County >> Oregon >> United States 9
- Columbia River >> Clatsop County >> Oregon >> United States 7
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- Crescent Harbor >> Del Norte County >> California >> United States 3
- Washington >> United States 3
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- Columbia River >> Douglas County >> Washington >> United States 2
- Maine >> United States 2
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Type
- Text 15
Decade
- 1860-1869 15