They planned on selling the lots for cabins, or vacation homes. The site was operated by Atomics International and Rocketdyne (originally both divisions of the North American Aviation company). They camped near a native village in the valley on the 14th.[30]. [115] Services will formerly provided through the Ventura County Library system. There are five high schools located in Simi Valley: Royal High School, Grace Brethren High School, Santa Susana High School, Simi Valley High School, and Apollo High School (a continuation school). 60%. There were 31,697 families (76.9% of all households); the average family size was 3.33. The average household size was 3.00. The Montalvo Cutoff, a railroad line opened by the Southern Pacific Railroad on March 20, 1904, to improve the alignment of its Coast Line, runs east–west through the valley. [31], The Pioneer, or ‘American,’ period in Simi Valley began with the 96,000-acre purchase of El Rancho Simí by an eastern speculator named Thomas A. Scott (1814–1882), who had made his money as an investor in the Pennsylvania Railroad during the Civil War. The annual average precipitation in Simi Valley is 17.9 inches. [43], The Santa Susana Field Laboratory includes sites identified as historic by the American Institute of Aeronautics and Astronautics and by the American Nuclear Society. Although severely damaged during the 1994 Northridge earthquake, it was placed on the National Register of Historic Places in 1996. The current population of Simi Valley (125,613) is it's peak population. Temperate variations between day and night tend to be relatively big. [34] Location: Robert P Strathearn Historical Park, 137 Strathearn Place, Simi Valley. In September 2009, The U.S. Department of Energy sponsored a public workshop where three nuclear reactor experts shared their independent analysis of the July, 1959 incident. Given its close proximity to Hollywood, Simi Valley has long been a popular entertainment industry location. [101][102][103] The area was originally served by the Santa Susana Depot which was also opened in 1904 as a combination passenger and freight depot built by the Southern Pacific and located on Los Angeles Avenue near Tapo Street. Both of these originate in the Santa Susana Mountains. Some college or associate's degree. Pacific Islander, 6.50% from other races, and 3.74% from two or more races. American Medical Response, in conjunction with Ventura County Fire Department, provide Emergency Medical Services at the Advanced Life Support (ALS) level. 93,181 people (75.0% of the population) lived in owner-occupied housing units and 30,396 people (24.5%) lived in rental housing units. The district has an inventory of 5,600 acres of public owned land,[117][118] including hundreds of acres of land in the Simi Hills. Other areas containing Chumash Native American pictographs in the Simi Hills are for instance by Lake Manor and Chatsworth. The population was spread out, with 31,036 people (25.0%) under the age of 18, 11,088 people (8.9%) aged 18 to 24, 33,890 people (27.3%) aged 25 to 44, 35,046 people (28.2%) aged 45 to 64, and 13,177 people (10.6%) who were 65 years of age or older. Rancho Simí, also known as Rancho San José de Nuestra Señora de Altagracia y Simí,[31] was a 113,009-acre (457 km2) Spanish land grant in eastern Ventura and western Los Angeles counties granted in 1795 to Santiago Pico. [41] The case was settled, it is reported, with a large payment by Boeing. Bush, is housed and available for tours. Spanning over 42 miles, Simi Valley has a population density of 3,039 people per square mile. [19] The native people who inhabited Simi Valley spoke an interior dialect of the Chumash language, called Ventureño. 19%. [73] Donald Trump's four-point win in the 2016 presidential election could possibly suggest a decreasing advantage for the Republican Party in Simi Valley. residing in the city. In N/A, there were N/A times more N/A residents (N/A people) in Simi Valley, CA than any other race or ethnicity. Basic Books: U.S. Department of Agriculture (C. Robert Elford). 1970. Simi Valley At A Glance The City of Simi Valley, with an estimated population of 126,788 (as of July 2015) is the third largest of Ventura County's ten cities. The 2010 United States Census reported that Simi Valley had a population of 124,237. The city's climate cools during winter when mean temperatures tend to be in the 50s. Simi Valley, CA Simi Valley is located about 40 miles from Los Angeles, but this city nestled in the California mountains offers a lifestyle that is 180 degrees opposite of what you find in LA. In 1972, Boys Town West was founded in the eastern end of Simi Valley. Many television series were filmed there during the 1950s, such as Richard Carlson's Mackenzie's Raiders though that program was set at the former Fort Clark near Brackettville in southwestern Texas.