Related Clues:

• Stops up
• Holds back
• Beavers' constructions
• Blocks
• Works like a beaver
• Hungry Horse and Mossyrock
• TVA creations
• Flood stoppers
• Glen Canyon and Grand Coulee
• Beaver structures
• Some female parents
• Hoover and Boulder, e.g.
• Hoover and Glen Canyon
• Oroville and Coulee
• TVA structures