You may think this was a tragedy, but it's all a matter of perspective.  You see, if this particular tunnel hadn't caved in somewhere in the 1930's, we wouldn't have the marvelous Goat Canyon trestle.  This tunnel circumnavigated Goat Canyon entirely.  Only a small trestle was needed to bridge the upper part of the Canyon.  After the cave-in, however, the only alternative was to span a 750ft wide spot further down in Goat Canyon with an industrial strength trestle.