History of Denver

Early in the 20th century, Denver, like many other cities, was home to a pioneering Brass Era car company. The Colburn Automobile Company made cars copied from the contemporary Renault.

From 1953 to 1989, the Rocky Flats Plant, a DOE nuclear weapon facility formerly located 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. 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. Plutonium contamination was still present outside the former plant site as of August 2010, and presents risks to building the envisioned Jefferson Parkway, which would complete Denver's automotive beltway.

Denver was selected in 1970 to host the 1976 Winter Olympics to coincide with Colorado's centennial celebration, but in November 1972 Colorado voters struck down ballot initiatives allocating public funds to pay for the high costs of the games, which were subsequently moved to Innsbruck, Austria. The notoriety of becoming the only city ever to decline to host an Olympiad after being selected has made subsequent bids difficult. The movement against hosting the games was based largely on environmental issues and was led by State Representative Richard Lamm, who was subsequently elected to three terms (1975–87) as Colorado governor. Denver explored a potential bid for the 2022 Winter Olympics, but no