Related Clues:

• Feature of a moat
• Female parent in the animal world
• Beaver's output
• Civil engineering project
• Thing beavers build
• First man heading off for weir?
• Fordham in Illinois
• Barrier with a spillway
• Stop (up)
• Barrier on a waterway
• Fish ladder locale
• Hydro plant locale
• Water flow stopper
• Reservoir structure
• Block a river's flow