The Lockwood Mill Historic District, consisting of Mill Number 1, Mill Number 2, Mill Number 3, and the associated power house and canal, is the only major nineteenth century textile complex constructed in Waterville, Maine. With its prominent site on the Kennebec River adjacent to the central business district, the district is a major architectural landmark that has long been important in the economic development of the city. The complex was designed and planned by Amos D. Lockwood, nationally significant as one of the first professional consulting mill engineers. Lockwood?s involvement was such that the complex was named in his honor in 1875 shortly before cotton weaving production came on line. Subsequent additions to the mill buildings were designed by Lockwood-Green in 1918-19, which powered both the mills and portions of the town. Mill Number 1 continued in use as a textile factory until around 1979. Mill Number 2 ceased operation as a cotton mill in 1955, but is also significant for its association with the Hathaway Shirt Company. From 1957-2002, Mill Number 2 served as the principal manufacturing plant for the Hathaway Shirt Company, an internationally known firm that originated in Waterville. It is the only intact industrial facility in Waterville associated with the important shirt maker. The Lockwood Mill Historic District was listed in the National Register of Historic Places for its roll in the industrial history of Waterville, its association with Hathaway Shirt Company, and its association with mill engineer Amos D. Lockwood.