The report on the collapse of Penmanshiel tunnel in 1979.
This document was published on 2nd August 1983 by Department of Transport.
It was written by Lieut. Col. I. K. A. McNaughton.
This item is linked to the Accident at Penmanshiel Tunnel on 17th March 1979
The original document format was Stapled Book, and comprised 7 pages.
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"At the time of the accident, work was in hand to increase the effective headroom by lowering the floor of the tunnel. The work on the Up (southbound) track had been completed and it had been reopened for single line traffic while a party of contractors' employees were engaged in tidying up the newly-excavated floor preparatory to the relaying of the Down line when the roof of the tunnel collapsed over a length of some 20 metres, allowing a quantity of broken rock, estimated at over 2000 tonnes, to pour into the tunnel, blocking it completely.
Of the men at work in the tunnel, 13 made good their escape but 2 were overwhelmed by the fall of rock and lost their lives, despite urgent and determined efforts at their rescue and recovery, including the attendance of a Mines Rescue team. Fortunately, no train was in or closely approaching the tunnel at the time of the collapse."
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