Marion-Osgood 3-1/2 Cubic Yard Capacity Model 73 Steam Shovel, circa 1910. This shovel is the size and type that built the Panama Canal. This machine will be the only on of this type still operation on steam. Donated to WMSTR by The Battletown, KY Park Board with the assistance of: Bellview Sand & Gravel Inc., Cemex Corp., Kentucky Railway Museum.