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- United States. Congress--Records and correspondence 138
- Northwest, Pacific 115
- River engineering 109
- Bridges--Design and construction 16
- United States--Appropriations and expenditures 16
- River surveys 14
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 63
- Columbia River >> Douglas County >> Washington >> United States 48
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- Text 138
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