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 1100 stations in 5 US 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. 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.
The Atlantic brand was spun off for ARCO's East Coast stations, and was acquired by 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 (except in Oregon, where customers are prohibited by state law from pumping their own gas), not accepting credit cards, and charging $0.45 for use of debit cards. h 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).
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 mark named after the Greek sun god which replaced 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 (license fee is $750,000/year with the license expiring in 2007). In March, 1997, ARCO also leased almost all the gas stations of the (now) Santa Fe Springs, CA based independent Thrifty Oil group of 250 stations found throughout California after a damaging price war which the independent Thrifty was unable to win.