 The Emory Grove-Gettysburg-Highfield route became the WM's Hanover Subdivision.In addition to servicing industries and cities in Pennsylvania, the Hanover Sub provided an alternate route between Baltimore and Hagerstown, although it was 23 miles (37 km) longer than the East Sub.The WM built a marine terminal at Port Covington in Baltimore in 1904, and built a new connecting line from the East Sub to the terminal.