An unnamed, seasonal stream originating from springs on the escarpment forms a steep-sided ravine which passes under the South Western Highway between the caravan park and former vineyards. The ravine is known as 'Dead Man's Gully'. The lower course of the stream is indistinct, but passes under the South Western Railway just south of the crossing to Wungong Road, and from this point the stream joined its northern counterpart near Ninth Road and one kilometer south-east of this discharges into the Wungong Brook.