Northwestern Steel's steam engines were among the last to operate in the United States. 73, as it was known, (a 1929 Baldwin locomotive) was among the final steam engines to be used in regular service in America. NWSW last used the locomotive on Dec. 3, 1980 at 10 a.m. Its final run was made coupled to the technology that replaced it, a diesel engine.
Northwestern Steel's steam locomotives were among the last in use in the United States. The 73, a Baldwin locomotive from 1929, was one of the final steam engines used for regular service before being replaced by diesel engines. It was retired on December 3rd, 1980 at 10:00 AM and its last run involved coupling to a diesel engine.