Arizona County

Graham County, Arizona

Mount Graham's international observatory complex and the Gila Valley - from the Mount Graham International Observatory (the 10,720-foot summit of Mount Graham hosts one of the world's premier astronomical observatories - the Large Binocular Telescope, with its twin 8.4-meter mirrors, is the world's largest single-mount optical telescope, and the Vatican Advanced Technology Telescope's presence on Mount Graham makes it one of the few places where the Vatican operates astronomical research equipment) to the Gila River's Graham County agricultural valley (the Safford-Thatcher valley's irrigated farmland - cotton, corn, and alfalfa - has sustained agricultural communities since Mormon settlers arrived in the 1870s).

County Seat Safford
Population 38,000
Founded 1881
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