Related Clues:
- River barriers
- Glen Canyon and Grand Coulee, e.g.
- River blockers
- Kid producers
- Muscle-bone connectors
- Hydroelectric structures
- Blocks the flow
- Driving forces
- Some power producers
- Blocks off
- Mechanics' focuses
- The ends of 18- and 60-Across and 3- and 31-Down are types of them
- Inflames
- Creek blocker
- Energy sources