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The Saltash Tunnel is a road tunnel on the A38 at
During construction of the tunnel a problem was encountered with flooding due to the saturation of the surrounding rocks. The resultant flow of water was channelled through the tunnel, hidden by a decorative cladding. Within a few months this cladding had begun to crack and water entered the part of the tunnel reserved for traffic; although no structural problems were found the water staining on the cladding gave the impression of a poorly built tunnel. This was commented upon in Parliament by the local MP, Skanska renovation project entry
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Saltash
Saltash (Cornish: Essa) is a town and civil parish in south Cornwall, England, United Kingdom. It had a population of 16,184 in 2011 census. Saltash faces the city of Plymouth over the River Tamar and is popularly known as "the Gateway to C ...
in Cornwall
Cornwall (; kw, Kernow ) is a historic county and ceremonial county in South West England. It is recognised as one of the Celtic nations, and is the homeland of the Cornish people. Cornwall is bordered to the north and west by the Atlan ...
, UK and was opened in 1988.
The central lane operates as a reversible lane
A reversible lane (British English: tidal flow) is a lane in which traffic may travel in either direction, depending on certain conditions. Typically, it is meant to improve traffic flow during rush hours, by having overhead traffic lights and l ...
to cope with holiday and rush hour traffic and the speed limit is 30 mph. The tunnel is used by more than 38,000 motorists per day and is 410 m long. It was designed by Mott, Hay and Anderson, built by Balfour Beatty
Balfour Beatty plc () is an international infrastructure group based in the United Kingdom with capabilities in construction services, support services and infrastructure investments. A constituent of the FTSE 250 Index, Balfour Beatty works ac ...
, and has a design life of at least 100 years.
Construction
During construction of the tunnel a problem was encountered with flooding due to the saturation of the surrounding rocks. The resultant flow of water was channelled through the tunnel, hidden by a decorative cladding. Within a few months this cladding had begun to crack and water entered the part of the tunnel reserved for traffic; although no structural problems were found the water staining on the cladding gave the impression of a poorly built tunnel. This was commented upon in Parliament by the local MP, Colin Breed
Colin Edward Breed (born 4 May 1947 in Surrey) is a British Liberal Democrat politician. He was the Member of Parliament (MP) for South East Cornwall from 1997 until he stood down at the 2010 general election. He was also member of the parliam ...
, and a £7.4 million renovation project was contracted to Skanska
Skanska AB () is a multinational construction and development company based in Sweden. Skanska is the fifth-largest construction company in the world according to ''Construction Global'' magazine. Notable Skanska projects include renovation of t ...
to provide for a new tunnel lining and improvements to the electrical system./ref>
See also
*List of tunnels in the United Kingdom
This is a list of road, railway, waterway, and other tunnels in the United Kingdom.
A tunnel is an underground passageway with no defined minimum length, though it may be considered to be at least twice as long as wide. Some government bodies ...
References
{{coord, 50.41161, N, 4.21496, W, type:landmark_region:GB, display=title Roads in Cornwall Tunnels in Cornwall Road tunnels in England Tunnels completed in 1988