Redheugh Bridge
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The Redheugh Bridge is a road bridge spanning the River Tyne between the west end of Newcastle upon Tyne and Gateshead, in North East England.
[edit] The First Crossing
In 1860, builder Richard Cail proposed a rail/road bridge at Redheugh, with the rail deck below the road level – the reverse of the High Level Bridge. The North Eastern Railway showed little interest so Cail, with others decided to press ahead with a road bridge. The first Redheugh (pronounced 'Redhewff') Bridge was opened in on 1st May 1871, engineered by Thomas Bouch who was also the designer of the ill-fated first Tay Bridge in Scotland (see The Tay Bridge Disaster). It was a slender construction with a footpath either side and supported by three river piers 30 metres above river level. However construction was hindered by delays in the delivery of materials, due to poor access roads and the scarcity of skilled labour. By as early as 1885 serious structural faults began to emerge. The general opinion was that repairs would cost more than a new bridge, and so was replaced.
[edit] The Second Crossing
Replacement commenced in 1897 with the new bridge being built around the old structure. Once again process was hindered by delays in materials and an inadequate work force. By 1900 the main girders and spans were in place and, ingeniously, hydraulic jacks were used to inch along the newly built superstructure until it rested on the previously constructed piers. The remains of the old structure were removed and the bridge was opened in August 1907. However, by the 1960's serious design flaws once again became apparrent. Ridiculous speed restrictions of 10 m.p.h. and weight restrictions of between 8 and 10 tonnes hindered the traffic flow and engineers stated that if it remained in use for much longer, the approaches and superstructure would need to be rebuilt. It was seen as more economical to build a new crossing.
[edit] The Present Crossing
Work to replace the second crossing began in 1980. Of the original crossing, only the south abutment now remains (adorned by a modern sculpture designed by Richard Deacon). The third bridge, much different from its two predecessors is a pre-stressed concrete bridge with its central span of 160 metres and two side spans of 100 metres (including the approaches, it is a total of 897 metres long and 15.8 metres wide) and can carry abnormal loads of up to 4,000 tonnes, and has a life expectancy of 120 years. It was constructed by Edmund Nuttall Ltd. to a design by Mott, Hay & Anderson. The two supporting concrete piers were fluted to create an impression of lightness and were designed to withstand the impact from a vessel of ten thousand tonnes travelling at a speed of five knots. Due to the exposed location, strong winds cause problems for high-sided vehicles, early in its life a double decker bus was nearly blown over the side but luckily came to rest leaning against the parapet railings. The bridge was opened on 18th May 1983 by the Princess of Wales. The total cost amounted to £15,350,000.
