first tourist railroad, began operating 1827. It was the Lehigh Coal & Navigation Company, initially a gravity road feeding anthracite coal downhill to the Lehigh Canal and using mule-power to return nine miles up the mountain; but, by the summer of 1829, as documented by newspapers, it regularly carried passengers. Later renamed the Summit Hill & Mauch Chunk Railroad, it added a steam powered cable-return track for true two-way operation by 1843, and ran as a common carrier and tourist road from the 1890s to 1937. Lasting 111 years, the SH&MC is described by some to be the world's first roller coaster. The first purpose-built common carrier railroad in the northeast was the Mohawk & Hudson Railroad; incorporated in 1826, it began operating in August 1831. Soon, a second passenger line, the Saratoga & Schenectady Railroad, started service in June 1832. In 1835 the B&O completed a branch from Baltimore southward to Washington, D.C. The Boston & Providence Railroad was incorporated in 1831 to build a railroad between Boston, Massachusetts and Providence, Rhode Island; the road was completed in 1835 with the completion of the Canton Viaduct in Canton, Massachusetts. Numerous short lines were built, especially in the south, to provide connections to the river systems and the river boats common to the era. In Louisiana, the Pontchartrain Rail-Road, a route connecting the Mississippi River with Lake Pontchartrain at New Orleans was completed in 1831 and provided over a century of operation. Completed in 1830, the Tuscumbia, Courtland & Decatur Railroad became the first railroad constructed west of the Appalachian Mountains; it connected the two Alabama cities of Decatur and Tuscumbia. Soon, other roads that would themselves be purchased or merged into larger entities, formed. The Camden & Amboy Railroad (C&A), the first railroad built in New Jersey, completed its route between its namesake cities in 1834. The C&A ran successfully for decades connecting New York City to the Delaware Valley, and would eventually become part of the Pennsylvania Railroad. 1851–1900 By 1850, over of railroad lines had been built. The B&O's westward route reached the Ohio River in 1852, the first eastern seaboard railroad to do so. Railroad companies in the North and Midwest constructed networks that linked nearly every major city by 1860. Transcontinental railroad The First Transcontinental Railroad in the U.S. was built across North America in the 1860s, linking the railroad network of the eastern U.S.