Related Clues:
- Big Easy protector
- Bank that deters flooding
- Place for a famous thumb
- Grand Coulee, for one
- Classic British war film, "The ___ Busters"
- Reservoir's edge
- Common lowland sight
- Delta dike
- Beaver job
- Hydroelectric option
- It may hold back the sea
- Sea wall's kin
- Mica or Gardiner
- Place for Don McLean's Chevy
- Protective barrier