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Topic
- United States--Appropriations and expenditures 24
- River engineering 20
- West (U.S.) 19
- Transportation 4
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- Railroad engineering 2
- Bodies of water 1
- Dams--Design and construction 1
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Region
- Portland >> Clackamas County >> Oregon >> United States 24
- Columbia River >> Clatsop County >> Oregon >> United States 14
- Willamette River >> Multnomah County >> Oregon >> United States 14
- Oregon City >> Clackamas County >> Oregon >> United States 6
- Yamhill River >> Yamhill County >> Oregon >> United States 6
- Clatskanie River >> Columbia County >> Oregon >> United States 4
- Vancouver >> Clark County >> Washington >> United States 4
- Clackamas Rapids >> Clackamas County >> Oregon >> United States 3
- Corvallis >> Benton County >> Oregon >> United States 3
- Cowlitz River >> Cowlitz County >> Washington >> United States 3
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Type
- Text 23
- Collection 1
Decade
- 1910-1919 24