Dan Wrote:
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> OK, found the study I remembered. Attached is an
> excerpt.
>
> In this issue of Engineering News, Gen. Henry
> Chittenden, of Seattle, describes the project
> which he has worked out with much painstaking
> detail for building a railway tunnel 30 miles in
> length under the main range of the Cascade
> Mountains. The building of this tunnel would
> enable the railway traffic between Puget Sound
> ports and the interior, which now has to be lifted
> vertically to an elevation of 2,500 to over 3,300
> ft. in crossing the Cascade range by the present
> railway lines, to pass under the main range at an
> elevation of only 1,200 ft Forgot to catch the
> date, might have been 1916 - well before
> design/construction of the present tunnel was
> started.


Very interesting, thanks Dan.