Overflow pipe, Silent Valley Reservoir, Head Road, Kilkeel, Newry, Co Down, BT34 4PU

Inverted circular bellmouth opening set into pitched side of reservoir near its south-east corner. Externally faced with rock-dressed granite blocks in regular courses and coped with large blocks of darker coloured ashlar granite with rounded outer rim. Inside face of bellmouth has four concrete baffle ribs and is lined with blue brick over pre-cast concrete blocks. Intake diameter at cill is 80ft. Orifice tapers into 16ft diameter brick-lined concrete pipe which turns a right-angle at bottom and thence into rock-cut tunnel under dam. At far side of dam, pipe assumes horseshoe profile in cross section and eventually discharges into open channel just above scour valve house.