Related Clues:

• Civil engineering project
• Thing beavers build
• It's available in spools and picks
• First man heading off for weir?
• Line through one's teeth?
• Fordham in Illinois
• Classic location for the mill recommended by dentists
• 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