Noun
gravity dam (plural gravity dams)
An impoundment dam that is wider at the base than at the top, and which uses the massive weight of the dam's mass to withstand the force of water being being stored behind the dam in its reservoir.
Grand Coulee Dam is a solid gravity dam and Braddock Locks & Dam is a hollow gravity dam. Source: Internet
In a gravity dam, the force that holds the dam in place against the push from the water is Earth's gravity pulling down on the mass of the dam. Source: Internet
This gravity dam featured an originally convert and convert stone wall, supported by a convert earth rampart. Source: Internet
When situated on a suitable site, a gravity dam can prove to be a better alternative to other types of dams. Source: Internet