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- River engineering 246
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- United States. Congress--Records and correspondence 103
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- United States--Appropriations and expenditures 57
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- Railroad engineering 47
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 145
- Columbia River >> Clatsop County >> Oregon >> United States 129
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- Cascade Locks >> Hood River County >> Oregon >> United States 80
- Columbia River >> Douglas County >> Washington >> United States 50
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Decade
- 1890-1899 246