From 1953 to 1989, the Rocky Flats Plant, a DOE nuclear weapon facility that was about 15 miles from Denver, produced fissile plutonium "pits" for nuclear warheads. A major fire at the facility in 1957, as well as leakage from nuclear waste stored at the site between 1958 and 1968, resulted in the contamination of some parts of Denver, to varying degrees, with plutonium-239, a harmful radioactive substance with a half-life of 24,200 years.[37] A study by the Jefferson County health director, Dr. Carl Johnson, in 1981, linked the contamination to an increase in birth defects and cancer incidence in central Denver and nearer Rocky Flats. Later studies confirmed many of his findings.[38][39][40] Plutonium contamination was still present outside the former plant site as of August 2010,[41] and presents risks to building the envisioned Jefferson Parkway,[42] which would complete Denver's automotive beltway.
Denver Public Schools (DPS) is the public school system in Denver. It educates approximately 92,000 students in 92 elementary schools, 18 K-8 schools, 34 middle schools, 44 high schools, and 19 charter schools.[128] The first school of what is now DPS was a log cabin that opened in 1859 on the corner of 12th Street between Market and Larimer Streets. The district boundaries are coextensive with the city limits.[129] The Cherry Creek School District serves some areas with Denver postal addresses that are outside the city limits.[129][130]
State Highway 470 (C-470, SH 470) is the southwestern portion of the Denver metro area's beltway. Originally planned as Interstate 470 in the 1960s, the beltway project was attacked on environmental impact grounds and the interstate beltway was never built. The portion of "Interstate 470" built as a state highway is the present-day SH 470, which is a freeway for its entire length.

Denver casillero

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