Related Clues:
- Water holder?
- You progress down some waterways and get to this barrier...which bursts and capsizes your boat. See 70-across.
- Lake former
- Lake maker
- River barrier
- Block off, as water flow
- TVA project
- Gardiner, for one
- It retains water
- Keep from running
- Thoroughbred's mother
- Leave it to beavers
- Beaver barrier
- Block the flow
- Beaver's oeuvre