In 1907 the syndicate acquired several railroad companies, including the George's Creek and Cumberland Railroad (GC&C), which had built a line west through the Cumberland Narrows, and then south to Lonaconing, Maryland. Using the portion of the line through the Narrows, the Connellsville Extension was built west from Cumberland to Connellsville, Pennsylvania, beginning in 1910, and it was completed in 1912. At Connellsville the WM connected with the Pittsburgh and Lake Erie Railroad (P&LE). In 1915 the WM obtained trackage rights on a B&O line from Bowest Junction (2 miles south of Connellsville) to Chiefton, West Virginia, which provided access to coal mines in the area west of Fairmont, West Virginia.