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This video takes a look at the Spiral Tunnels on the Laggan sub located east of Field BC.
These tunnels replaced a line built in 1886 that had a 4.4% grade to it causing many derailments in the 25 years it was open. In 1909 the new spiral tunnels opened creating a 2.2% grade that was far less dangerous and made way for the current longer trains we see today.
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