diversion dam
dam that diverts all or a portion of the flow of a river from its natural course
headworks
any structure at the head or diversion point of a waterway, civil engineering term
International Diversion Dam
dam in Ciudad Juárez, Chihuahua, Mexico
Harrisons Cut gold diversion
diversion dam in Victoria, Australia
weir
barrier across a river designed to alter its flow characteristics
barrage
type of dam