Related Clues:
- River block
- A river runs to it
- China's Three Gorges, for one
- It checks the water
- Structure whose name might make kids giggle (3)
- Keep from flowing
- Block, as a river
- Hydroelectric power site
- Pedigree listing
- Mother among mammals
- Barrier
- Mica, for one
- Grand Coulee, for one
- Classic British war film, "The ___ Busters"
- Reservoir's edge