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Under the "Historical background" section, the 1985 inventory record stated: "This was one of several houses owned by the National Fuel Company and later sold." This statement appears to suggest that there were other properties within Louisville itself that the National Fuel Company owned. However, it is believed that the company didn't own any other land parcels in Louisville. It is more likely that the inventory record was referring to the fact that the company owned houses at a mine location such as the Monarch Mine #2 outside of Louisville that the company later sold to people who moved them into town. The "Historical background" section of the inventory record also noted that "[i]t is not typical miner's housing since it is a two story Dutch Colonial Revival. It may have been the home of someone of supervisory level." The statement of significance states: "This is the only surveyed Dutch Colonial Revival structure in Louisville. It has integrity of location and some structural integrity, despite an addition in back and a porch addition." The house was referred to as the "Koeppler House" in the 1985 survey, but a search of the property records indicates that Joseph Koeppler owned the property for only two months in 1936. John Unger Ownership, 1904-1907; Discussion of Date of Construction Orrin Welch, the Pleasant Hill Addition developer, sold Lots 3, 4, and 5 in Block 7 to John Unger in 1904 for $120. (The property would later be divided, resulting in 728 Grant and 732 Grant. This occurred in the early 1950s.) Boulder County gives 1904 as the date of construction for this house, both on the 1948 County Assessor card and on the current website. The 1985 inventory record for 728 Grant also relied on this date from the County. Boulder County has been found to be in error with respect to the date of construction of some Louisville buildings, so other evidence is looked to. In this case, no evidence indicating a different construction date was located. The house is shown in the correct location on the 1909 Drumm's Wall Map at the Louisville Historical Museum. The significance of the ownership by John Unger (who was born in 1865 in Austria) is that Unger was a "carpenter & bldr," as stated in the 1906 directory for Louisville. He is known to have built or added onto other houses in Louisville, and he could well have been the builder of the house. The County's date of 1904 as the construction year seems consistent with this information. The deed executed when Unger sold the property in 1907 states that the purchase price was $1,775. Harry Van Mater and the National Fuel Company Ownership, 1907-1936 Next, Unger sold this house and property in 1907 to Harry Van Mater (1860-1932), a coal operator who was the longtime President of the National Fuel Company. He then transferred ownership to the National Fuel Company itself in 1912. 2