Limit your search
Topic
- River engineering 31
- United States--Appropriations and expenditures 30
- River surveys 16
- West (U.S.) 11
- Transportation 6
- United States. Congress--Records and correspondence 6
- Canals--Design and construction--Costs 4
- Dams--Design and construction 3
- Locks (Hydraulic engineering) 3
- Bodies of water 2
- more »
Region
- Columbia River >> Clatsop County >> Oregon >> United States 31
- Portland >> Clackamas County >> Oregon >> United States 31
- Willamette River >> Multnomah County >> Oregon >> United States 26
- Pacific Ocean >> Earth 8
- Vancouver >> Clark County >> Washington >> United States 7
- Astoria >> Clatsop County >> Oregon >> United States 6
- Snake River >> British Columbia >> Canada 6
- The Dalles >> Wasco County >> Oregon >> United States 6
- Yamhill River >> Yamhill County >> Oregon >> United States 6
- Cowlitz River >> Cowlitz County >> Washington >> United States 5
- more »
Type
- Text 26
- Collection 5