Talk:Cowburn Tunnel

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[edit] Cowburn Tunnel

Not clear what there was to flood to 30m... was it the airshaft perhaps?

  • It flooded the header. They drilled a header shaft and worked outwards. At Totley they drilled seven.

And the rising line - was it to avoid going into the unstable shale? (I dimly recollect this was a problem at Woodhead?)

  • It may have been but my reference didn't say, just gave dimensions.

I'd assumed it was limestone, and also with Totley (I remember it as Dore and Totley like the station) and the water was from springs. The tunnels are each end of the Hope Valley, so my assumption was, they were limestone outcrops around the shale in the valley. I'll have to ask a geologist. Chevin 22:00, 1 October 2005 (UTC)

  • The Totley tunnel was cut through a mixture of shale, coal and ganister deposits and probably Crawshaw sandstone, which itself is fairly fragile. I'm still trying to find out about Cowburn. Chevin 13:13, 14 October 2005 (UTC)
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