What is a sluice house?

A sluice house is a small structure that houses the machinery used to operate a sluice gate. Sluice gates are used to control the flow of water in rivers and canals, and they are often operated by a hand crank or a motor. Sluice houses are typically made of wood, metal, or concrete, and they may be located on the banks of a river or canal, or on an island in the middle of a river.