Primarily in response to plans for a major transportation corridor through the eastern portion of the planning area, residents and County staff initiated work on a comprehensive land use plan in the early 1970s. The result of this effort was adoption of the Black Forest Preservation Plan in 1974. While this plan recommended rural-residential uses for most of the planning area, it also delineated several large areas for mixed urban uses. The largest of these was in the southeast where the new "city" of Latigo would later be proposed.