Steamtown National Historic Site includes the Locomotive Erecting Shop, built in 1909, where heavy maintenance was done on locomotives and where more than 70 locomotives were built, with a foundry, blacksmith shop, machine shop, and laboratory; the Office and Storage Building, also built in 1909, served as a warehouse for the erecting shop and as the main office for the Scranton yard; the Sand Tower, built in 1917, dried and stored sand used on all locomotives to improve traction; the Containment Rings, built from 1944 to 1950, were reinforced concrete placed around diesel fuel tanks at the Scranton yard, which was the DL&W's diesel repair facility; the Store House, built in 1900, stored mining equipment for the DL&W's coal mines; the Locomotive Shop, used from 1865 to 1949, includes part of the first locomotive shop built in 1865 that is still in use today, though the structure has undergone many changes, became a diesel facility in 1949, and today serves as a restoration shop; the Roundhouse, built in 1902 and 1937, serviced steam locomotives and is open to museum visitors; the Museum Complex, built in 1995 on the site of the roundhouse, includes a theater, history museum, technology museum, visitor center, and restored historic roundhouse sections; the Oil House, built in 1912, stored the yard's flammable lubricants and lighting fluids, and part of it is used as the park's bookstore; the Dickson Manufacturing Company building, built in 1876, housed a machine shop and pattern shop where locomotives and machinery were produced; Bridge 60 Tower, built in 1953, controlled yard switching; and the Excursion Platform was built in 1995.