The Santa Fe ordered 40 2-6-2 express locomotives in 1901, which had a driver diameter of 79 inches (2,007 mm) and a four-cylinder Vauclain compound engine. These formed classes 1000 and 1014 and were intended for routes such as the section between La Junta and Albuquerque, which had steep gradients of up to three percent. They had a large boiler, but only a comparatively small firebox. Three were also built with a Jacobs-Shupert firebox. 

In 1902 and 1903, a further 103 class 1050 locomotives were built. These had a driver diameter of only 69 inches (1,753 mm), which still ensured sufficient speed. Like their predecessors, they were also built by Baldwin. Between 1912 and 1924 the locomotives were rebuilt to simple two-cylinder engines. From 1918 they also received a superheater. The oldest locomotives also received smaller 69-inch wheels and some were converted to oil firing. They were retired between 1941 and 1956.