Silver Jubilee Bridge

From Wikishire
Jump to navigation Jump to search
Silver Jubilee Bridge
Lancashire, Cheshire

The Silver Jubilee Bridge at night
Location
Carrying: Road traffic and pedestrians
Crossing: River Mersey
Location
Grid reference: SJ50998356
Location: 53°20’48"N, 2°44’16"W
Structure
Length: 527 yards
Main span: 361 yards
Design: Through arch bridge
Material: Steel
History
Information

The Silver Jubilee Bridge (originally the Runcorn–Widnes Bridge or informally the Runcorn Bridge) crosses the River Mersey and the Manchester Ship Canal at the 'Runcorn Gap', overleaping the great river between Runcorn in Lancashire on the north bank and Widnes in Cheshire on the south.

The bridge carries the A533 road and a cantilevered footway across the Mersey.

This is a through arch bridge with a main arch span of 361 yards. It was opened in 1961 as a replacement for the Widnes-Runcorn Transporter Bridge, since dismantled. In 1975–77 the carriageway was widened, after which the bridge was given its official name in honour of the Queen's Silver Jubilee of 1977. It is a Grade II listed structure.[1]

The bridge was closed to vehicles for refurbishment at the opening of the new Mersey Gateway Bridge, set to reopen (after delays) in February 2021.[2][3][4]

Structure, specifications and costs

The main arch is 361 yards long and each side arch measures 83 yards. Its height over the riverbed is 285 feet and the headroom over the ship canal is 80 feet.

During the bridge's construction, 5,900 tons of steel were used, 7,500 tons of concrete and 720,000 rivets. The bridge requires constant repainting, with each coat using 6,000 gallons of paint.

On the Lancashire side the approach viaducts are 359 yards in length, and on the Cheshire side 166 yards. The cost of constructing the bridge was £2,433,000.[5] At the time of its construction it had the third longest steel arch span in the world. It had the longest vehicular span in the country, but this record was held for only a few weeks until the Tamar Bridge was completed. By 2001 it was the 10th longest steel arch bridge, and at that time was just eight inches short of having Europe's largest span.[6]

History

Before the brifdge

Until 1868, when Runcorn Railway Bridge was opened, the only means of crossing the Mersey at or near Runcorn Gap were by fording or by ferry:[7] the lowest bridge on the river was the road bridge at Warrington.[8] The Runcorn ferry was a well-known crossing, and the subject of a comic piece by Stanley Holloway about a family unwilling to pay 'per tuppence per person per trip'.

The first bridge to carry vehicular traffic across Runcorn Gap was the Widnes-Runcorn Transporter Bridge which opened in 1905.[9] This contraption, which carried vehicles in a gondola under a steam-driven winch high above the river, was an inefficient means of transport and it had become inadequate for the amount of traffic using it before the outbreak of Second World War. In 1946 the Ministry of Transport agreed that the transporter bridge should be replaced when sufficient funds were available. Mott, Hay and Anderson were appointed as consultant engineers.[10]

The new bridge had to allow the passage of shipping along the Manchester Ship Canal. Many ideas were considered, including a new transporter bridge or a swing bridge. These were considered to be impractical and it was decided that the best solution was a high-level bridge upstream from the railway bridge. This would allow the least obstruction to shipping and would also be at the narrowest crossing point. The first plan for a high-level bridge was a truss bridge with three or five spans, giving an 8-yard dual carriageway with a cycle track and footpaths. This was abandoned because it was too expensive, and because one of the piers would be too close to the wall of the ship canal. The next idea was for a suspension bridge with a span of 343 yards between the main towers with an eight-yard single carriageway and a two-yard footpath. However aerodynamic tests on models of the bridge showed that, while the bridge itself would be stable, the presence of the adjacent railway bridge would cause severe oscillation.

The finally accepted design was for a steel through arch bridge with a ten-yard single carriageway.[11] The design of the bridge is similar to that of Sydney Harbour Bridge in New South Wales but differs from it in that the side spans are continuous with the main span rather than being separate from them. This design feature was necessary to avoid the problem of oscillation due to the railway bridge. The main span measures 361 yards and each side span is 83 yards.[6]

Construction

Construction began on 25 April 1956. The contractors for the first phase of work, Leonard Fairclough of Adlington, cleared the ground and constructed the foundations for the piers. The contract for the second phase, the building of the main arch and the side arches, was given to Dorman Long of Middlesbrough who sub-contracted the building of the bridge deck, viaduct and roadworks to Leonard Fairclough. Building of the bridge itself began in March 1958 and the side spans were completed by November 1959. The main arch was built by cantilevering steelwork from the side spans until it met in the middle in November 1960. The carriageway was suspended from the arch by 48 lock-coil wire ropes.[12] From February 1960, approach roads and viaducts were being built on both sides of the river; the total length of viaduct constructed was 525 yards.[13] The approaches on the Runcorn side blocked the Bridgewater Canal at Waterloo Bridge and the line of locks leading down to the Mersey were filled in.[14] The bridge was officially opened as the Runcorn-Widnes Bridge by Princess Alexandra on 21 July 1961.[15][16]

Since creation, the bridge has always been painted in a light shade of green.[17]

Later work

The Silver Jubilee bridge from the railway

The bridge transformed Runcorn from an effective dead end into a town with through traffic. Trade at the Port of Runcorn increased sixfold between 1960 and 1970. The presence of the bridge enabled the development of the New Town in Runcorn in the late 1960s and the 1970s. The amount of traffic using the bridge trebled between 1961 and 1970;[18] this led to such severe congestion that in 1965 the first of two road widenings took place with a lane being added down the middle of the bridge (commonly referred to as the suicide lane). By 1975 traffic had increased to 40,000 vehicles per day and the bridge was widened again adding a fourth lane; the approach roads were improved creating a better flow on and off the bridge.

The carriageway was widened by incorporating the footpaths, giving it four lanes, and a cantilevered foot-way was built on the east side of the bridge. This work was completed in 1977, the year of The Queen's Silver Jubilee, and so the bridge was renamed from Runcorn Bridge to the Silver Jubilee Bridge in commemoration of the jubilee.[19]

Even after the widening, the modern, mobile society impinged such that traffic on the bridge continued to grow to over 80,000 vehicles a day, and there was frequent congestion. In order to alleviate this, a further crossing was built, known as the Mersey Gateway Bridge. This is a six-lane toll bridge to the east of the Silver Jubilee Bridge that opened on 14 October 2017.

Following the opening of the Mersey Gateway, the Silver Jubilee bridge was immediately closed to vehicles for refurbishment, after which it will reopen with tolls applied to both bridges.[20][21] After refurbishment is complete it will reopen with a single lane of vehicle traffic in each direction and a new cycle and footpath. The road network on the Runcorn side of the bridge will be reconfigured. The West Viaduct, also known as the "Trumpet Loop", will be demolished and replaced with a roundabout, with the land recovered from the viaduct used for new leisure and retail space.[22]

Outside links

 ("Wikimedia Commons" has material
about Silver Jubilee Bridge)

References

  1. ↑ National Heritage List 1130421: Runcorn Widnes Road Bridge (Grade II listing)
  2. ↑ "Bridge reopening delayed again as council reveals new target". InYourArea. 9 November 2020. 
  3. ↑ "Bridge reopening delayed until 2020" (in en-GB). BBC News. 12 December 2018. https://www.bbc.com/news/uk-england-merseyside-46540536. 
  4. ↑ Manning, Craig (14 November 2019). "Silver Jubilee Bridge to reopen full-time for pedestrians and cyclists". Runcorn and Widnes World. https://www.runcornandwidnesworld.co.uk/news/18036193.silver-jubilee-bridge-reopen-full-time-pedestrians-cyclists/. Retrieved 28 November 2020. 
  5. ↑ Thompson 2001, p. 44
  6. ↑ 6.0 6.1 Thompson 2001, p. 6
  7. ↑ Anon. 1978, pp. 1–6
  8. ↑ Starkey 1990, p. 166
  9. ↑ Starkey 1990, pp. 212–215
  10. ↑ Thompson 2001, pp. 3–4
  11. ↑ Thompson 2001, pp. 4–5
  12. ↑ Thompson 2001, pp. 6, 9–15
  13. ↑ Thompson 2001, pp. 21–24
  14. ↑ Starkey 1990, p. 221.
  15. ↑ Thompson 2001, pp. 28–30
  16. ↑ "Princess Opens Bridge 1961". British Pathé. 27 July 1961. https://www.britishpathe.com/video/princess-opens-bridge. Retrieved 28 November 2020. 
  17. ↑ "Stay cable fascinating facts". Mersey Gateway Project. 2017. http://www.merseygateway.co.uk/stay-cable-fascinating-facts/. Retrieved 28 November 2020. 
  18. ↑ Thompson 2001, pp. 32–34.
  19. ↑ Thompson 2001, pp. 35–38
  20. ↑ Mersey Gateway, New Mersey Gateway, http://www.merseygateway.co.uk/tolls/tolls-live-outside-halton/, retrieved 9 November 2008 
  21. ↑ "The Mersey Gateway Project". Mersey Gateway Project. February 2017. http://www.merseygateway.co.uk/wp-content/uploads/2017/03/15418-MG_leaflet_complete_Feb-2017_small.pdf. Retrieved 28 November 2020. 
  22. ↑ Brown, Faye (1 January 2019). "Amazing images show how Runcorn could look in the next 10 years". https://www.liverpoolecho.co.uk/news/liverpool-news/amazing-images-show-how-runcorn-15602364. Retrieved 28 November 2020. 
  • Anon. (1978), The Bridging of Runcorn Gap, Halton Borough Council 
  • Starkey, H. F. (1990), Old Runcorn, Halton: Halton Borough Council 
  • Thompson, Dave (2001), Bridging Us Together: The Story of Runcorn-Widnes Bridge, Widnes: Dave Thompson 
  • Thompson, Dave (2000), Bridging the Mersey: A Pictorial History, Zaltbommel: European Library, ISBN 90-288-2640-8 


Bridges and crossings on the River Mersey
Queensway Tunnel Mersey Railway Tunnel Ethelfleda Bridge Silver Jubilee Bridge Mersey Gateway Forrest Way Bridge Factory Lane Pipe Bridge
Retrieved from "https://wikishire.co.uk/w/index.php?title=Silver_Jubilee_Bridge&oldid=72945"