line went from Centralia (named for the railroad), to the rapidly growing city of Chicago. In Chicago, its tracks were laid along the shore of Lake Michigan and on an offshore causeway downtown, but land-filling and natural deposition have moved the present-day shore to the east. Track from Centralia north to Freeport would be abandoned in the 1890s, as traffic to Galena was routed via Chicago. In 1867, the Illinois Central extended its track into Iowa. During the 1870s and 1880s, the IC acquired and expanded railroads in the southern United States. IC lines crisscrossed the state of Mississippi and went as far south as New Orleans, Louisiana, and east to Louisville, Kentucky. In the 1880s, northern lines were built to Dodgeville, Wisconsin; Sioux Falls, South Dakota; and Omaha, Nebraska. Further expansion continued into the early twentieth century. The Illinois Central, and the other "Harriman lines" owned by E.H. Harriman by the 20th century, became the target of the Illinois Central shopmen's strike of 1911. Although marked by violence and sabotage in the southern, midwestern, and western states, the strike was effectively over in a few months. The railroads simply hired replacements, among them African-American strikebreakers, and withstood diminishing union pressure. The strike was eventually called off in 1915. The totals above do not include the Waterloo RR, Batesville Southwestern, Peabody Short Line or CofG and its subsidiaries. On December 31, 1925, IC/Y&MV/G&SI operated 6,562 route-miles on 11,030 miles of track; A&V and VS&P added 330 route-miles and 491 track-miles. At the end of 1970, IC operated 6,761 miles of road and 11,159 of track. In 1960, the railroad retired its last steam locomotive, 2-8-2 Mikado #1518. On August 31, 1962, the railroad was incorporated as Illinois Central Industries, Inc. ICI acquired Abex Corporation (formerly American Brake Shoe and Foundry Co.) in 1968. Illinois Central Gulf Railroad (1972–1988) On August 10, 1972, the Illinois Central Railroad merged with the Gulf, Mobile and Ohio Railroad to form the Illinois Central Gulf Railroad . October 30 of that year saw the Illinois Central Gulf commuter rail crash, the company's deadliest. At the end of 1980, ICG operated 8,366 miles of railroad on 13,532 miles of track; that year it reported 33,276 million ton-miles of revenue freight and 323 million passenger-miles. Later in that decade, the railroad spun off most of its east–west lines and many of its redundant north–south lines, including much