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Louisville Historical Museum Department of Library & Museum Services City of Louisville, Colorado May 2015 I�f city Louisville COLORADO * SINCE 187E 737 Johnson St. History Legal Description: LOT 13 LESS WLY 4FT OF SLY 65 FT AND LOT 14, BLK 5, JOHNSON'S FIRST ADDITION, Louisville, Colorado Year of Construction: 1964 Summary: According to the Boulder County Assessor's Office, this house was built in 1964 and was moved to 737 Johnson in 1990. It was moved from a property on S. 88th St., which was then a rural property believed to have been located west of 88th St. and south of Dillon Road. Development of the Johnson's First Addition Johnson's 1st Addition was platted in 1890 by Mahlon V. Johnson. It was only the second residential subdivision to be platted, after the Jefferson Place Addition was platted in 1880. (It consists of two separate sections that do not border one another, though both abut Roosevelt.) Mahlon V. Johnson (1838-1922) was a Denver -based coal mine operator who started the Ajax Coal Mining Co. in 1889 and served as its president. He had worked as a civil engineer in Indiana and came to Colorado in 1871 to "assume the superintendency of bridges and buildings for the Colorado Central Railroad Company and was thus actively identified with the building of that railroad system and of other Colorado railroads as well" (from the book History of Colorado, published 1918, by Wilbur Fiske Stone). (Johnson's son, Frederick, co-founded the Boulder Daily Camera newspaper in 1890.) Records indicate that the Ajax Mine started operations in 1890. Maps place its location as being near the southeast corner of Hoover and Lois in Louisville, not far from Johnson St. According to 1889 articles in Denver newspapers, the original intent was to establish a new town by Louisville to be called "Ajaxville" with proximity to the new Ajax Mine. However, instead, Johnson platted this subdivision to the town of Louisville. According to the Sept. 1, 1