U.S.B.R. DRUM GATES This gate remains hinged at the top of the crest of the spillway. This gate when open i.e. when not in position remains swung into a ditch formed at the crest of the spillway. In open position drum of the gate itself forms the crest of the spillway while the framework supporting the skin plate remains in the ditch. See Fig. 14.22 dotted position. The gate remains hinged at point A. The gates is put in closed position with the help of power driven winches only. BEAR TRAP GATE This gate consists of two parts, one part slipping over the other for some length. It is mostly use for low Navigation dams.
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