come in the future. #493 ran under its own power for the first time on January 24, 2020, and has been the D&SNG's primary piece of motive power throughout 2020 and 2021. No. 493 has been converted to an oil burner and is operational. No. 497 was traded to the C&TSRR in October, 1991 and is awaiting an overhaul in the Chama roundhouse. No. 498 is stored partially disassembled in Durango. No. 499 was traded to the Royal Gorge Park in May, 1999 and is placed on display. Diesel engines Diesels were first introduced to the Durango Yard in the 1960s with diesel locomotive #50. Today, #50 is now on display at the Colorado Railroad Museum in Golden, Colorado. The United States Transportation Corps. also had a six-axle narrow-gauge diesel locomotive (#3000) for trial use in Durango in the 1950s, which saw limited use. Diesel engine #1, nicknamed the "Hotshot", is a 50-ton center-cab diesel built by General Electric in 1957. It was acquired from the Arkansas Limestone Railroad. During the 2002 Missionary Ridge Fire, the D&SNG voluntarily shut-down steam service. To help continue service, Hotshot pulled coaches out along the highline from Rockwood, Colorado. It is currently stationed in Durango. Diesel engine #2, nicknamed the “P.B. II”, is a 45-ton center-cab diesel built by General Electric in February, 1951 and was originally Algoma Steel #1, from Sault Ste. Marie, Ontario. It was later sold to the Yosemite Mountain Sugar Pine Railroad in May, 2006. It is currently in service on the YMSPRR as their #402. Diesel engine #4 is a 55-ton center-cab diesel built by General Electric in August, 1955 and was originally Algoma Steel #4, from Sault Ste. Marie, Ontario. It was later sold to the Colorado Railroad Museum in 2004. It is currently in service at the C.R.R.M. as Golden City & San Juan #4. Diesel engine #5 is a 45-ton center-cab diesel built by General Electric in May, 1960 and was originally Algoma Steel #5, Sault Ste. Marie, Ontario. It currently remains stored partially disassembled in Durango. Diesel engine #7, nicknamed the "Big Al", is an 87-ton center-cab diesel built by General Electric in August, 1975 and was originally Algoma Steel #7, from Sault Ste. Marie, Ontario. Big Al is named after the current owner of the D&SNG, Allen C. Harper. It was later sold to the Colorado Railroad Museum in December, 2021 and eventually moved