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- Willamette River >> Multnomah County >> Oregon >> United States 27
- Columbia River >> Clatsop County >> Oregon >> United States 17
- Santiam River >> Marion County >> Oregon >> United States 8
- Bonneville Dam >> Multnomah County >> Oregon >> United States 4
- McKenzie River >> Lane County >> Oregon >> United States 4
- Grand Coulee Dam >> Okanogan County >> Washington >> United States 2
- Malheur National Wildlife Refuge >> Harney County >> Oregon >> United States 2
- Portland >> Washington County >> Oregon >> United States 2
- Sweet Home >> Linn County >> Oregon >> United States 2
- Alaska >> United States 1
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Repository
- Oregon State University. Libraries 44