Related Clues:
- Hoover and Mossyrock
- Mica and Tobin
- Landing piers on rivers
- Flood preventives
- Challenges for salmon
- Protective embankments
- Prevents from running, in a way
- Fish ladder locales
- They supply hydroelectric power
- Cousins of levees
- Overflow protection
- Beavers' handiwork
- Hydropower structures
- Creators of artificial lakes
- Sights in New Orleans