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Topic
- Rivers--Oregon 219
- Dams 126
- Fishways 34
- Salmon 30
- Flood control 28
- Canals 16
- Fishes--Conservation 16
- Water--Pollution 15
- Hydroelectric power plants 13
- Power-plants 9
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 224
- Linn County >> Oregon >> United States 78
- Santiam River >> Marion County >> Oregon >> United States 58
- Marion County >> Oregon >> United States 56
- Yamhill County >> Oregon >> United States 22
- Yamhill River >> Yamhill County >> Oregon >> United States 22
- Calapooia River >> Linn County >> Oregon >> United States 17
- Tualatin River >> Clackamas County >> Oregon >> United States 14
- Clackamas County >> Oregon >> United States 13
- South Yamhill River >> Yamhill County >> Oregon >> United States 13
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Rights
- In Copyright 224
Local Collection Name
- William L. Finley Papers, 1899-1946 (MSS Finley) 40
- Extension Bulletin Illustrations Photograph Collection, 1915-1963 (P 020) 2
- Gifford Collection Photographs by Unknown or Other Photographers, circa 1915-1955 (P 218-SG 6) 2
- Wanda Gifford Photographs, 1948-1958 (P 218-SG 4) 2
- Gerald W. Williams Regional Albums (P 303) 1
- Gwil Evans Photographic Collection, 1930-1968 (P 082) 1
- Public Health Department Records, 1971-1999 (RG 231) 1
- Ralph I. Gifford Photographs, circa 1910s - 1947 (P 218-SG 2) 1
Type
- Image 183
- Text 40
- Moving Image 1
Format
- image/tiff 183
- application/pdf 40
Institution
- Oregon State University 224
Decade
- 1940-1949 224
