デュランゴ・アンド・シルバートン狭軌鉄道
While regular production of steam locomotives by Alco ended in the 1950s, Alco-built steam engines have been preserved in locations across North America. They can be found on the Nevada Northern Railway in Ely, Nevada; at the Orange Empire Railway Museum in California, on the Lake Whatcom Railway in Washington and on the Durango and Silverton Narrow Gauge Railroad in Colorado. Several Alco-built mainline engines are still operational, such as Union Pacific 844, Union Pacific Big Boy 4014, Milwaukee Road 261 and Soo Line 1003. UP Challenger 3985 ran until 2014, but is now retired.