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Creator
- United States. War Department 12
- Wilson, John M. (John Moulder), 1837-1919 3
- Michler, N. (Nathaniel), 1827-1881 2
Topic
- Bodies of water 12
- River engineering 12
- River surveys 12
- Rivers 12
- United States. Congress--Records and correspondence 12
- River channels 9
- Harbors 7
- Northwest, Pacific 7
- Canals 5
- Rapids 5
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Region
- Columbia River >> Douglas County >> Washington >> United States 12
- Willamette River >> Multnomah County >> Oregon >> United States 12
- Oregon >> United States 11
- Washington >> United States 11
- Snake River >> Franklin County >> Washington >> United States 7
- California >> United States 5
- San Francisco Bay >> San Mateo County >> California >> United States 3
- Coos Bay >> Coos County >> Oregon >> United States 2
- Umpqua River >> Douglas County >> Oregon >> United States 2
- Clearwater River >> Nez Perce County >> Idaho >> United States 1
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Decade
- 1870-1879 12