a double track bridge that was completed in 1909. Also in 1864, the C&IN Railroad merged with the Galena & Chicago Union Railroad to form the Chicago & North Western Railroad (C&NW). In the north–south direction, railroad development continued as well. In 1868, the C&NW built a branch line connecting Lyons with the east–west railroad at Clinton. In 1870, the Iowa Midland Company built a railroad from Lyons to Anamosa, Iowa, to the Northwest. This railroad was later absorbed by the C&NW. In 1872, the Chicago, Clinton, & Dubuque Railroad (CC&D) was built North from Lyons. It became part of the Milwaukee Road; it extended another line South to Clinton. The last of the railroads in Clinton, the Davenport, Rock Island, and Northwestern, was completed from the Southwest along the Mississippi River to Clinton in 1901. An interurban passenger railroad (the Clinton, Davenport, and Muscatine Railway) operated along this trackage as late as 1940. This right-of-way, along with that of the former CC&D, is currently operated by Canadian National. In 1869, due to its importance as a major transportation hub, the county seat was moved to Clinton; it has resided there ever since. The Clinton County Court House, located at 612 North 2nd Street, was designed by G. Stanley Mansfield, Architect, of Freeport, Illinois, and Josiah L. Rice, Supervising Architect, of Clinton. It was constructed between 1892 and 1897. The first public school in Clinton was conducted in a log house near the W.J. Young upper mill. It was erected in the winter of 1855-56 and Isaac Baldwin was its first teacher. St. Irenaeus School was opened in 1852. The original Lyons-Fulton Bridge was constructed in 1891 (replaced by the Mark N. Morris Memorial Bridge in 1975), followed by the Clinton High Bridge in 1892 (replaced by the Gateway Bridge in 1956). Between the 1850s and 1900, the cities of Lyons and Clinton quickly became centers of the lumber industry and were regarded as the "Lumber Capital of the World." Huge log rafts were floated down the river from Wisconsin and Minnesota, cut into lumber at Clinton, then shipped to the growing communities via the river and the railroads. Companies owned by the W.J. Young, Chancy Lamb, George M. and Charles F. Curtis (Curtis Bros. & Co), David Joyce, Silas W. Gardiner Lyons, and Friedrich Weyerhäuser families soon became among the largest in the nation. In the 1880s and 1890s