a coal mine. It was later determined that the coal did not belong to the mine developer, and the line was abandoned, the town was scrapped. Only four trains ever ran on this line, those carrying the ballast to complete the track. In 1910 the federal government condemned the low-clearance covered bridge in Bridgeport (now South Brownsville), and the Monongahela Railroad bought the bridge company and removed the bridge. In the same year they installed a 10-stall roundhouse in Bridgeport. This was to be the main yard for the railroad throughout its history. In 1911 the railroad served seven mines and fifty one coke works (with 34 coke works and 1 mine being on the Dunlap Creek Division) The daily rated output was 1,395 cars of coke and 280 cars of coal. In 1911-1912 the big push was the state line extension, to make a connection with the Buckhannon and Northern Railway (B&N). It involved a major river crossing and two large creek crossings. On July 1, 1915 the Monongahela Railroad consolidated with the Buckhannon and Northern Railway to form the Monongahela Railway Company (MRY), still under the control of the parent companies (PRR and P&LE). In 1927 the Baltimore and Ohio railroad acquired 1/3 (1/6 from each the PRR and P&LE) of the capital stock of the Monongahela Railway, securing their interests in the coal-producing area it served. On January 1, 1930 the Ten Mile Run branch opened. This branch still serves one major coal mine, the Emerald Mine in Waynesburg, as of 2015. On October 21, 1950 the Monongahela Railway discontinued passenger service. On November 25, 1952 the Monongahela Railway ran its first Baldwin S-12 diesel locomotive. This marked the beginning of the end of their fleet of steam locomotives, the last one of which being used on May 26, 1954. In June 1968 the Waynesburg Southern Railroad Company (organized in the interest of the PRR) opened a line from Waynesburg to Consolidated Coal Company's Blacksville No. 1 mine and Eastern Gas & Fuel Company's Federal No. 2 mine. This line is still in service as of 2015, although Blacksville No. 1 has closed while a third mine in the same area, Blacksville No. 2, is active. On May 1, 1993 the Monongahela Railway was merged into the Consolidated Rail Corporation (Conrail), which had previously bought out the shares of B&O successor CSX Transportation and Pittsburgh & Lake