Answer:

dam

Answer	Crossword Clue
DAM	Hoover, for one
DAM	It holds water
DAM	TVA project

DAM	Hoover is one
DAM	Hoover or Norris
DAM	It retains water
DAM	Reservoir creator
DAM	Water container?
DAM	Water stopper
DAM	Barrier
DAM	Boulder, e.g.

DAM	Hoover or Beaver
DAM	Mama horse
DAM	Current blocker
DAM	Flow stopper
DAM	TVA structure
DAM	Stop up
DAM	Fish ladder's locale
DAM	Beaver project

DAM	Beavers' structure
DAM	Block
DAM	Current checker
DAM	Spillway setting
DAM	Hungry Horse or Hoover
DAM	River block
DAM	It'll hold water
DAM	Hydropower source

DAM	One crossing a river
DAM	New Mexico's Elephant Butte, e.g.
DAM	River-valley construction
DAM	Fish-ladder site
DAM	River crosser
DAM	Provider of flower power?
DAM	Datum on a horse's pedigree papers
DAM	Hoover, e.g.

DAM	Lake maker, maybe
DAM	Beaver's creation
DAM	Beaver's handiwork
DAM	Obstruct
DAM	Lake maker