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Creator
- United States. Army. Office of the Chief of Engineers 39
Topic
- United States--Appropriations and expenditures 39
- River engineering 35
- West (U.S.) 20
- River surveys 14
- Transportation 5
- Canals--Design and construction--Costs 4
- Dams--Design and construction 4
- Locks (Hydraulic engineering) 4
- Railroad engineering 3
- Bodies of water 2
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Region
- Portland >> Clackamas County >> Oregon >> United States 39
- Willamette River >> Multnomah County >> Oregon >> United States 29
- Columbia River >> Clatsop County >> Oregon >> United States 26
- Yamhill River >> Yamhill County >> Oregon >> United States 10
- Clackamas Rapids >> Clackamas County >> Oregon >> United States 7
- Oregon City >> Clackamas County >> Oregon >> United States 7
- Vancouver >> Clark County >> Washington >> United States 7
- Corvallis >> Benton County >> Oregon >> United States 6
- Cowlitz River >> Cowlitz County >> Washington >> United States 6
- Eugene >> Lane County >> Oregon >> United States 6
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Type
- Text 35
- Collection 4