Sheffield heavy engineering company DavyMarkham has won a £750,000 contract for the mechanical, electrical and hydraulic elements of a spectacular lifting bridge over the canal at Gloucester.
Designed by Bristol architects White Young Green, St Ann Way Bridge is designed to enhance the city’s transport system, linking the inner relief road to the newly completed bypass, and provide a focal point for the regeneration of central Gloucester.
Monmouthshire civil engineers Alun Griffiths Contractors awarded the contract, and the bridge project itself is being funded and managed by national regeneration agency, English Partnerships, supported by the South West RDA.
The bridge is a bascule (counterweighted) design with a single counterbalanced 28m movable span, stiffened by tensioned cables attached to a tubular steel gantry and raised by means of two hydraulic cylinders. DavyMarkham will be responsible for the bridge’s main pivot bearings and brackets, hydraulic deck operating machinery, tail locking assemblies and electrical control equipment. It will also provide vehicular and pedestrian barriers, CCTV and PA systems, and an operator control desk for regulating bridge traffic and deck open/close routines.
The slimline bridge will carry a single carriageway road, with shared pedestrian and cycling routes on either side, and provide a 6m draught to allow most boats to pass beneath when lowered. It will be raised for tall-masted vessels negotiating the main 12m-wide navigation channel.
Contract delivery is scheduled for the end of the year, in advance of the planned bridge opening in Spring 2008.