Related Clues:

• Beaver building
• Power tool?
• Dental ___
• Reservoir creator
• Flow checker
• Beaver work
• Gardiner or Mica
• 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
• Hydroelectric power site
• Pedigree listing