gravity dam

A gravity dam is a large structure built across a river or reservoir to hold back water. It relies on its own weight and the force of gravity to stay stable and resist the water's pressure. Made from materials like concrete or stone, its mass pushes down into the foundation, preventing it from being pushed over or moved. Gravity dams are effective for controlling water flow, generating hydroelectric power, and managing water supplies, especially in areas with solid bedrock that can support their heavy weight.