Sluice
WEBA sluice gate. A sluice (/ s l u s / SLOOS) is a water channel containing a sluice gate, a type of lock to manage the water flow and water level. It can also be an open channel which processes material, such as a river sluice used in gold prospecting or mill race, leet, flume, penstock or lade is a sluice channeling water toward a water .