Related Clues:

• Lake former, perhaps
• Greeks' D
• Hydroelectric facility
• Beaver creek project
• It goes against the flow
• Mouth feature
• River-mouth formation
• A river runs to it?
• Beaver endeavor
• It forms at the mouth
• It may have a big mouth
• River-mouth feature
• Aswan, for one
• Altanta-based airline
• Beaver's construct