Postcards--Maryland--Bloomington; Baltimore and Ohio Railroad Company--History; Railroads--Maryland; Bloomington (Md.)--History--Pictorial works;
Seventeen Mile Grade is a 17 mile (27.3 km) steep section of railroad tracks between the small town of Piedmont, West Virginia and the summit of Altamont, Maryland. It is so steep that in some places it reaches 116 feet (35.4 m) per mile. The track...