Related Clues:

• TVA project
• Gardiner, for one
• River-flood preventer
• It retains water
• Dick Van --
• Keep from running
• Thoroughbred's mother
• Barrier in Holland
• Leave it to beavers
• Beaver barrier
• Block the flow
• Flood-control device
• Beaver's oeuvre
• 'When the ___ Breaks' (old blues song)
• Robert E. Lee waiting spot