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.