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Topic
- Rivers--Oregon 142
- Dams 138
- Rivers--Washington (State) 115
- Waterfalls 73
- Rivers--Idaho 40
- Fishways 33
- Fish traps 30
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- Salmon 23
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 119
- Columbia River >> Clatsop County >> Oregon >> United States 101
- Chelan County >> Washington >> United States 87
- Columbia River >> Douglas County >> Washington >> United States 87
- Lane County >> Oregon >> United States 81
- Payette River >> Payette County >> Idaho >> United States 23
- McKenzie River >> Lane County >> Oregon >> United States 22
- Weiser River >> Washington County >> Idaho >> United States 21
- Clackamas County >> Oregon >> United States 19
- Tucannon River >> Columbia County >> Washington >> United States 19
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Rights
- In Copyright 383
Format
- image/tiff 319
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Collection
- Pacific Northwest Stream Survey 383
Decade
- 1930-1939 383
