Topics
Dams
4
Hydroelectric power plants
Recreational use
Research
3
Social aspects
3
Aesthetic resources
2
Archaeological significance
2
Economic aspects
2
Power utilization
2
Wilderness areas
2
Effect of dams on
1
Environmental aspects
1
Fishes
1
Pacific salmon fishing
1
Rafting (Sports)
1
Recreational surveys
1
River surveys
1
Rivers
1
White-water canoeing
1