Subject
- Cities and towns -- Oregon -- Willamette River Watershed -- Growth1
- Climatic changes -- Oregon -- Willamette River Watershed1
- Irrigation water -- Oregon -- Willamette River Watershed1
- Land use -- Oregon -- Willamette River Watershed1
- Reservoirs -- Oregon -- Willamette River Watershed1
- Reservoirs -- Oregon -- Willamette River Watershed -- Regulation1
- Water levels -- Oregon -- Willamette River Watershed -- Management1
- Water use -- Oregon -- Willamette River Watershed1
- Watersheds -- Recreational use -- Oregon -- Willamette River Watershed1