Re: Photo: Gondolas With Structures For Hoover Dam (Circa 1930-1935)

Randy Hees

It is unlikely for weight.  The Boulder City Branch was laid with relay 90lb, with 23 ties per 39' rail length (although they used 31' rails) so was equivelent to any UP main line at the time.  The grades were 1.1 to 1.2%.  The line was super elevated to allow 45mph.  There are photos of the smaller challangers in Boulder City.  We believe that the larger chalangers with centepied tenders would have had issues on the wye.

Randy Hees,
Retired Director, Nevada State Railroad Museum, Boulder City

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