Historic Preservation Commission Agenda and Packet 2020 01 13

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IUCityaf Louisville COLORADO • SINCE 1882 Supporting category These are typically buildings that are newer than the period of historic significance and therefore do not contribute to our ability to interpret the history of Louisville. They do, however, express certain design characteristics that are compatible with the architectural character of the historic district. They are "good neighbors" to older buildings in the vicinity and therefore support the visual character of the district. Non-contributing building category These are buildings that have features that deviate from the character of the historic district and may impede our ability to interpret the history of the area. They are typically newer structures that introduce stylistic elements foreign to the character of Louisville. Some of these buildings may be fine examples of individual building design, if considered outside the context of the district, but they do not contribute to the historic interpretation of the area or to its visual character. The detracting visual character can negatively affect the nature of the historic area. Non-contributing, with Qualifications: These are buildings that have had substantial alterations, and in their present conditions do not add to the historic character of the area. However, these buildings could, with substantial restoration effort, contribute to the downtown once more. PRESERVATION APPROACHES While every historic project is different, the Secretary of the Interior has outlined four basic approaches to responsible preservation practices. Determining which approach is most appropriate for any project requires considering a number of factors, including the building's historical significance and its existing physical condition. The four treatment approaches are: • Preservation places a high premium on the retention of all historic fabric through conservation, maintenance and repair. It reflects a building's continuum over time, through successive occupancies, and the respectful changes and alterations that are made. • Rehabilitation emphasizes the retention and repair of historic materials, but more latitude is provided for replacement because it is assumed the property is more deteriorated prior to work. • Restoration focuses on the retention of materials from the most significant time in a property's history, while permitting the removal of materials from other periods. • Reconstruction establishes limited opportunities to re-create a non -surviving site, landscape, building, structure, or object in all new materials. The Secretary of the Interior's website outlines these approaches and suggests recommended techniques for a variety of common building materials and elements. An example of appropriate and inappropriate techniques for roofs is provided in the sidebars. Additional information is available from preservation staff and the Secretary's website at: www.cr.nps.gov/hps/tps/standguide/index.htm THE SECRETARY OF THE INTERIOR'S STANDARDS The Standards are neither technical nor prescriptive, but are intended to promote responsible preservation practices that help protect our Nation's irreplaceable cultural resources. For example, they cannot, in and of themselves, be used to make essential decisions about which features of the historic building should be saved and which can be changed. But once a treatment is selected, the Standards provide philosophical consistency to the work. 7 42