Search
« Previous | 1 - 10 of 172 | Next »
Limit your search
Topic
- Dams 172
- Rivers--Oregon 147
- Fishways 34
- Flood control 28
- Salmon 24
- Fishes--Conservation 20
- Canals 16
- Hydroelectric power plants 13
- Irrigation 7
- Power-plants 6
- more »
Region
- Willamette River >> Multnomah County >> Oregon >> United States 126
- Santiam River >> Marion County >> Oregon >> United States 38
- Marion County >> Oregon >> United States 34
- Linn County >> Oregon >> United States 32
- Columbia River >> Clatsop County >> Oregon >> United States 22
- Yamhill County >> Oregon >> United States 20
- Yamhill River >> Yamhill County >> Oregon >> United States 20
- Clackamas County >> Oregon >> United States 11
- South Yamhill River >> Yamhill County >> Oregon >> United States 11
- Willamina Creek >> Yamhill County >> Oregon >> United States 11
- more »
Rights
- In Copyright 172
Format
- image/tiff 124
- application/pdf 44
- image/jpeg 4
Institution
- Oregon State University 172
Decade
- 1940-1949 172
