SHIP SHAPE: A 19th Century Thomas Telford-built inverted syphon beneath the Gloucester-Sharpness Ship Canal has been repaired and strengthened by the high tech Insituform process. The 50m long Brickpits culvert, which carries surface water under the canal, is made up of two 1.2m diameter brick culverts linked by a central 1.2m by 900mm syphon section constructed from rectangular cast iron segments. British Waterways was concerned about the condition of this section, but was anxious to avoid dewatering it due to the lack of cover below the 6m deep canal.
Main contractor Sewer Services, working with Insituform Technologies, used divers to clean the flooded syphon section before pulling through Insituform's resin-impregnated liner system.
Contract value is £95,000.