Unknown2019-02-042019-02-041955EPM-071-02-011http://hdl.handle.net/20.500.11867/15425Single 10 x 8 inch photograph. Verso has typed label taped to it. Date est.Writing at the top of the photograph appears to have nothing to do with the photograph. "Near the summit of the Cascade range, in 1886. NP trains crossed this mountain barrier by means of switchbacks prior to completion of the Stampede tunnel."PhotographRailroads--Design and constructionRailroads--Northern Pacific;