District (later renamed the Montalvo Municipal Improvement District) and built a sewage treatment plant to facilitate further development. Development was halted in 1958 when the Ventura County Health Department found the sewage treatment plant to be inadequate. After improvement to the sewage facilities, development resumed. In 1961, Ventura County master plan consultants proposed developing Montalvo as "the core of an urban region" covering Ventura, Oxnard, Point Hueneme, and Saticoy, which was predicted to reach a population of 700,000 by 1980 and 2,000,000 by the year 2020. The consultants proposed making Montalvo the hub of Ventura County government, culture, and transportation, including development of a civic center and a state college. In 1967, the Ventura Freeway was constructed through Montalvo, resulting in significant financial losses to local merchants. Annexation and crime problems In the 1980s, residents debated proposals to accept annexation of Montalvo into the city of Ventura. An initial effort at annexation was defeated in 1992. In the 1970s and 1980s, the city of Ventura moved eastward and 35 apartment buildings were constructed on three Montalvo streets south of the Bristol Shopping Center. By 1990, Montalvo had a population of 4,630 and a median household income of $46,602. In the 1990s, the area began to experience increased blight and crime, including fights, drug dealing and tagging, as two gangs claimed the apartment area as their territory. In 1994, the Ventura Police Department opened a storefront substation in Montalvo to attempt to fight the increased crime. Montalvo was finally annexed into the city of Ventura in September 2012. Landmarks Notable landmarks in Montalvo included Sam Korb's Trading Post, Loop's Restaurant, Little Heidelberg Restaurant, and The White Spot. Montalvo also was home to a mound in the northern part of the community that was thought to be the work of native Americans. It was described in the 1890s as having an altitude of 150 feet with smoothly sloping sides and approximately one-quarter mile in length. Later press reports indicate that large portions of the mound were removed to be used as fill dirt. See also East Ventura station West Montalvo Oil Field References Ventura County, California Ventura, California Neighborhoods in Ventura County, California