Related Clues:

• Beavers' river blockers
• Beavers’ creations
• Water containers?
• Stops up, as a river
• Blocks, like a river
• Power-production projects
• Lake formers
• Structures beavers build
• Holds back, in a way
• River-blocking constructions
• Stops (up)
• Beavers' formations
• Beaver's creations
• Bank buildings?
• Flow blockers