Related Clues:
- Beaver-built blockages
- Beaver barriers
- Hoover and Mossyrock
- Mica and Tobin
- Challenges for salmon
- Golfer Mike and kin
- Prevents from running, in a way
- Fish ladder locales
- They supply hydroelectric power
- Beavers' handiwork
- Hydropower structures
- Creators of artificial lakes
- Hydroelectric projects
- Beaver-made barriers
- Civil engineering projects