The Colorado Midland Railway (reporting mark CM), incorporated in 1883, was the first standard gauge railroad built over the Continental Divide in Colorado. It ran from Colorado Springs to Leadville and through the divide at Hagerman Pass to Glenwood Springs and Grand Junction. History. John J. Hagerman gained control of the Colorado Midland Railway Company in June 1885. In September 1890, Hagerman sold the railroad to the Atchison, Topeka and Santa Fe Railway, which operated the railroad as a subsidiary and changed the name to the Colorado Midland Railroad.
https://en.wikipedia.org/wiki/Colorado_Midland_Railway