Related Clues:

• Mother
• Hoover ___
• Fort Peck ___, in Montana
• Water container?
• Spill checker?
• Gatehouse site
• It can hold its water
• Lake maker, perhaps
• Block, in a way
• Block up
• Flood preventer
• Hoover or Tarbela, e.g.
• Sire's counterpart
• River sight
• Flood control