Bulkhead Gate

A gate used either for temporary closure of a channel or conduit before dewatering it for inspection or maintenance or for closure against flowing water when the head difference is small (e.g., for diversion tunnel closure).

A gate used either to temporary close a channel or conduit in order to empty it for inspection or for closure against flowing water when the head difference is small, e.g., a diversion tunnel closure. Although a bulkhead gate is usually opened and closed under nearly balanced pressures, it nevertheless may be capable of withstanding a large pressure differential when in the closed position.