An ARCO filling station off Slauson Avenue in Los Angeles Atlantic Richfield Company (ARCO) is an American oil company with operations in the United States as well as in Indonesia, the North Sea, and the South China Sea. It has more than 1,300 gas stations in the western part of the United States. ARCO was originally formed by the merger of East Coast-based Atlantic Refining and California-based Richfield Oil Corporation in 1966. A subsequent merger in 1969 brought in Sinclair Oil Corporation. It became a subsidiary of UK-based BP in 2000 through its BP West Coast Products LLC (BPWCP) affiliate.
ARCO is known for its low-priced gasoline compared to other national brands, mainly due to an early 1980's decision to emphasize cost cutting (cash/debit-only policy) and alternative sources of income (ampm). ARCO is headquartered in La Palma, California.
The Atlantic Petroleum Storage Company's heritage dates back to 1866. It became part of the Standard Oil trust in 1874, but achieved independence again when Standard Oil was broken up in 1911.
In 1915, Atlantic opens its first gas station on Baum Boulevard in Pittsburgh, Pennsylvania.
In 1917, First Richfield Oil Company of California gas station at Slauson and Central Avenues in Los Angeles, California. Richfield Oil Company of California logo is an Eagle trademark.
The Atlantic Refining Company was headquartered in Philadelphia, Pennsylvania.
In 1921, Sinclair Oil Company opens first modern service station in Chicago called "Greasing Palace No. 1". Sinclair gets into trouble with Teapot Dome scandal.
In 1966, Atlantic merges with the Richfield Oil Company of California. The first CEO was Robert Orville Anderson. The new company boasts a new trademark, a red diamond shape called the ARCO Spark designed by Bauhaus artist, designer, and architect Herbert Bayer.
Commercial oil exploration started in Prudhoe Bay, Alaska, in the 1960s and the Prudhoe Bay Oil Field, North America's largest oil field, was discovered on March 12, 1968, by Atlantic Richfield Company (ARCO) and Exxon with the well Prudhoe Bay State #1. Key employees with ARCO Alaska were Marvin Mangus and John M. Sweet. The Richfield Oil Company of California had purchased the drilling rights to the land where the discovery well was located. British Petroleum had drilling rights near the discovery well.
ARCO acquired Sinclair Oil Corporation in 1969, but later divested certain Sinclair assets during the mid 1970s, resulting in Sinclair returning as a private company. At one time, ARCO had its headquarters in the City National Plaza complex in Downtown Los Angeles In 1978, ARCO opened the first of its ampm convenience stores in Southern California.
ARCO once had a presence in the Southwestern U.S. a stretch of Texas State Highway 225 east of Loop 610 in Houston, Texas, had an oil tank farm once painted with the ARCO logo. Lyondell-Citgo would rebrand the oil tanks in the 1980s. ARCO's Corporate Headquarters were in the ARCO Center in Los Angeles at the corner of 5th and Flower Streets before they were acquired by BP. ARCO's Oil & Gas division headquarters were in downtown Dallas, Texas. The headquarters' building was a 46-story office building designed by architect I.M. Pei, the ARCO Tower. ARCO closed the Dallas office and sold the building in the mid 1980s. Today, ARCO operates about 1,100 stations in five Western states: California, Nevada, Oregon, Washington, and Arizona.
ARCO merged with Anaconda Copper Mining Company (ACM) of Montana in 1977. ACM holdings including the Berkeley Pit and the Anaconda, Montana Smelter. ARCO founder stated "he hoped Anaconda's resources and expertise would help him launch a major shale-oil venture, but that the world oil glut and the declining price of petroleum made shale oil moot."  The purchase turned out to be a regrettable decision for ARCO. A lack of experience with hard-rock mining and a sudden drop in the price of copper to below seventy cents a pound, the lowest in years, caused ARCO to suspend all operations in Butte, Montana. By 1983, only six years after acquiring rights to the "Richest Hill on Earth", the Berkeley Pit was completely idle. By 1986, some ARCO properties were sold to billionaire industrialist Dennis Washington, whose company, Montana Resources, operates a much smaller open-pit mine east of the defunct Berkeley Pit.
In 1985, the Atlantic brand was spun off for ARCO's East Coast stations as Atlantic Petroleum. Atlantic was acquired by Dutch trader John Deuss who later sold it in 1988 to Sunoco. The ARCO brand is now used on the West Coast. ARCO specializes in discount gas by removing many frills, among them forcing prepayment for fuel, not accepting credit cards at most locations, and charging 45 cents for the use of debit cards. In most locations, it is co-branded with ampm convenience stores, also a division of BP West Coast (ARCO introduced the ampm concept in 1979).
ARCO financed EASTLUND in the beginning of the 1990s for High Auroral Active Research Project (HAARP Project). In March 1997, ARCO also leased almost all the gas stations of the (now) Santa Fe Springs, California based independent Thrifty Oil group of 250 stations found throughout California after a damaging price war which the independent Thrifty was unable to win.
On April 18, 2000, ARCO was purchased by BP America and completely merged into BP operations except for ARCO Alaska which, due to FTC requirements, was sold by BP to Phillips Petroleum. ARCO as a subsidiary no longer exists.
Over the course of 2004 and 2005, ARCO signs have been replaced. New signs still have the Arco spark, but BP's Helios (BP's new white, yellow, and green "sunburst" mark named after the Greek Sun god, replacing the old British Petroleum shield mark) is also located on the sign. A new tagline "ARCO - part of BP" has also appeared on some signs and advertisements. ARCO is known for sponsoring the ARCO Arena in Sacramento, California, with a license fee of $750,000/year through 2007.
ARCO is the responsible party for America's largest Superfund site a site that takes in the towns of Butte and Anaconda, and of the Clark Fork River including Milltown Dam. The region's water and soil were polluted by a century of mining and smelting. Chemicals of concern include many heavy metals and arsenic. On 7 February 2008, the United States Environmental Protection Agency announced that prolonged litigation with ARCO ended when ARCO agreed to pay $187 million to finance natural resource restoration activities.
- Harold Harby, Los Angeles City Council member, 1939 42, 1943 57, worked for Richfield Oil
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