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Louisville Historical Museum <br />Department of Library & Museum Services <br />City of Louisville, Colorado <br />June 2017 <br />I�f city <br />Louisville <br />COLORADO * SINCE 187E <br />724 Johnson History <br />Legal Description: Lots 10-11 and the western 20 feet of Lot 12, plus a 20 foot strip abutting the <br />south side of the property (vacated alley), Block 4, Johnson's First Addition, Louisville, Colorado <br />Year of Construction: 1939 <br />Summary: Alva and Murel Pierce constructed 724 Johnson in 1939. The original parcel that the <br />Pierces purchased in 1939 consisted of additional property to the east and west of the current <br />parcel. These lots have been sold off over the years. <br />Development of the Johnson's First Addition <br />Johnson's 1st Addition was platted in 1890 by Mahlon V. Johnson. It was only the second <br />residential subdivision to be platted, after the Jefferson Place Addition was platted in 1880. (It <br />consists of two separate sections that do not border one another, though both abut Roosevelt.) <br />Mahlon V. Johnson was a Denver -based coal mine operator who started the Ajax Coal Mining <br />Co. in 1889 and served as its president. According to 1889 articles in Denver newspapers, the <br />original intent was to establish a new town by Louisville to be called "Ajaxville" with proximity <br />to the new Ajax Mine. However, instead, Johnson platted this subdivision that became part of <br />the town of Louisville. <br />Pierce Family Ownership of 724 Johnson, 1939-1947; Discussion of Date of Construction <br />Rocky Mountain Fuel Company came to own some of the lots in the Johnson's First Subdivision. <br />The reason for and the date of the company's acquisition of the lots are not known. <br />In 1939, Alva Pierce (1887-death date unknown) and Murel [sic] Sandy Triplett Pierce (1892- <br />1994) purchased Lots 9 through 14 from the Rocky Mountain Fuel Company. They had married <br />in 1930. <br />According to the County Assessor Card for this property and the County website, 724 Johnson <br />was constructed in 1939. Boulder County has sometimes been found to be in error with respect <br />1 <br />