transportation for mined coal. In 1849, the Mill Creek R. R. distribution to the Schuylkill Canal and the P&R was over 100,000 tons of coal to the canal and 140,000 tons to the railroad. An 1857 charter supplement authorized the Mill Creek R. R. to build branches to the Mahanoy Valley in the Second Coal Region, but an unassociated corporation, the Mahanoy & Broad Mountain Railroad, instead built that line, which was leased and operated by the P&R. This expansion allowed coal from the Mahanoy Valley collieries to be transported south through St. Clair, Pennsylvania to the markets. References and Notes Defunct Pennsylvania railroads History of rail transportation in the United States