On Factory Island, the Saco Iron Works began operation in 1811. The Saco Manufacturing Company established a cotton mill in 1826, and a canal was dug through rock to provide water power. The mill burned in 1830, but was replaced in 1831 by the York Manufacturing Company. With the arrival of the Portland, Saco and Portsmouth Railroad in 1842, Factory Island developed into a major textile manufacturing center, with extensive brick mills dominating the Saco and Biddeford waterfronts. Other businesses included foundries, belting and harnessmaking, and machine shops. But the New England textile industry faded in the 20th century, and the York Manufacturing Company would close in 1958. The prosperous mill town era, however, left behind much fine architecture in the Georgian, Federal, Greek Revival and Victorian styles. Many buildings are now listed on the National Register of Historic Places.