Talk:Ruling gradient

Tunnels

 * Ardglen
 * 500 m (1,640 ft) estimate from Curve and Gradient book.
 * 487 m (1,599 ft) Bayley
 * Bayley doesn't mention gradient

tunnel talk
The whole missive on tunnels should be in a separate article.

The case with the Cascade Tunnel is less than hypothetical and ignores geographical reality. I believe the primary reason the original tunnel was replaced, was the winter avalanche problem on the west approach.

Baden K. 189.188.230.218 (talk) 23:30, 28 November 2015 (UTC)

External links modified
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