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Bridget Bacon, Louisville Historical Museum Department of Library & Museum Services City of Louisville, Colorado February 2020 Cityof Louisville COLORADO • SINCE 1878 501 Jefferson Ave. History Legal Description: Lots 15-17, Block 3, Acme Place, Louisville, Colorado Year of Construction: Unknown; relocated and remodeled in 1948 Summary: This house was relocated from the Columbine Mine camp in 1948. Its original construction date is unknown. It was the home of the family of William and Ruth Leslie from 1948 until 1974. Development of the Acme Place Addition In 1893, John Connell, who had helped to establish the Acme Mine at what is now the corner of Roosevelt and Hutchinson, platted the subdivision of Acme Place. It covered what are now the 500 blocks of Lincoln, Grant, Jefferson, and La Farge Avenues. The Acme Place subdivision was only the fourth addition to Original Louisville and was likely developed due to its proximity to the Acme Mine that was started in 1888. The 1909 Drumm's Wall Map of Louisville shows that the 500 blocks of Lincoln and Grant were well populated with houses by 1909, but the 500 blocks of Jefferson and La Farge, which were located quite close to the Acme Mine and parts of which were within the Mine's fenced enclosure, had few houses at that time. Boulder County Property records indicate that the land that Connell used to establish Acme Place had been acquired directly from the Acme Coal Mining Company. In 1911, Rocky Mountain Fuel Company acquired the mine and was the owner/operator of the Acme Mine until it closed in 1928. Rocky Mountain Fuel Company for many years continued to own the property, including the lots that make up 501 Jefferson. Leslie Family Ownership of Property, 1946-1974; Discussion of Date of Construction In 1946, Rocky Mountain Fuel Company sold these lots, plus two adjoining lots, to William J. and Ruth Leslie. (The next year, the Leslies sold the adjoining lots, which became 515 Jefferson. The house at 515 Jefferson was also identified on its Assessor Card has having been relocated, and other information indicates that it also came from a mine camp.) 1