A Documentary History of the South Park Line: Vol. I* A Chronology of Alpine Tunnel* The Abandonment of Service through Alpine Tunnel and over Boreas Pass in 1910* The Gunnison District, 1879 to 1910Based on newspaper accounts about, and railroad documents of, The Denver, South Park & Pacific Railroad; The Denver, Leadville & Gunnison Railroad and The Colorado & Southern Railway.
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Transportation