An existing bridge which spans the River Derwent in Belper has contained a sewer within its structure since it was built in 1905.
This existing sewer was defective having corroded to an extent that is has lost most of its original flexural strength and was in need of replacement so Severn Trent decided to seal the existing sewage pipe and construct a new pipe running just outside the bridge deck, significantly extending the asset life of the sewerage system and reducing the risk of pollution to the River Derwent.
Land & Water Services were engaged to carry out the works which required the new pipework being lifted into position using a 30 tm knuckle boom crane mounted on a floating pontoon due to a weight restriction of 3 tonnes being placed upon the bridge. In addition Land & Water carried out all the detailing of the works and fabricated and installed all the supporting bracketary. The works were completed to the full satisfaction of the client, ahead of schedule and to budget.