Tar Tunnel

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Inside the Tar Tunnel Inside the Tar Tunnel - geograph.org.uk - 1457462.jpg
Inside the Tar Tunnel

The Tar Tunnel an abandoned tunnel located on the north bank of the River Severn in the Ironbridge Gorge at Coalport, England. It is one of ten Ironbridge Gorge Museums attractions administered by the Ironbridge Gorge Museum Trust.

Miners struck a gushing spring of natural bitumen, a black treacle-like substance, when digging a canal tunnel for the Coalport Canal in 1787,[ citation needed ] or else digging a level in search of coal. [1] [2] The plan, proposed by William Reynolds, was to connect the canal alongside the River Severn to the lower galleries of the mines below the Blists Hill area. [3] After digging around 3,000 feet (910 m) into the hill the canal project was abandoned in favour of bitumen extraction.

The doorway house to the Tunnel Tar Tunnel - geograph.org.uk - 292355.jpg
The doorway house to the Tunnel

The tunnel was a great curiosity in the eighteenth century and bitumen still oozes gently from the brick walls today. Bitumen's chief commercial use at the time was to treat and weatherproof ropes and caulk wooden ships, but small amounts were processed and bottled as 'Betton's British Oil', a panacea remedy for rheumatism and scurvy. [4] [2] After the canal project was abandoned the Hay Inclined Plane was built instead, its base being alongside the canal basin.

In the past visitors were provided with hard hats and were able to enter the first 300 feet (91 m) of the brick-lined tunnel as far as an iron gate. Electric lighting is provided. Due to a build up of gas in the tunnel, it is unsafe to enter but visitors can still get a view along part of its length from the entrance. [5]

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References

  1. J. Huxley (1983). Britain's Onshore Oil Industry. Springer. p. 29. ISBN   1349065978.
  2. 1 2 William Marshall (1818). Western Department. The Review and Abstract of the County Reports to the Board of Agriculture. Vol 2. Board of Agriculture.
  3. Underground canals shropshirehistory.com, accessed 19 July 2015.
  4. "Directions for taking and using Betton's true and genuine British oil" (PDF). 1758.
  5. Museum website accessed 26 July 2017.

Coordinates: 52°37′12″N2°27′9″W / 52.62000°N 2.45250°W / 52.62000; -2.45250