The Robert Pearson Collection: Porter Air Locomotives - Homestake Mine No. 35, South Dakota

Photos I took of Porter compressed air locomotive No. 35 used in Homestake gold mine in Lead, South Dakota.  The 18" gauge locomotive was construction number 7201 and built 4/1931 with 6x10 cylinders, a 36" wheelbase and weighted 5 tons.   This was the last compressed air locomotive built by Porter for the Homestake Mining Co.