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| builder = | materials = | height = | used = | demolished = | condition = | ownership = | open_to_public = | controlledby = | garrison = | current_commander = | commanders = | occupants = | battles = | events = | image2 = | caption2 = }} The Chidlaw Building is a former United States Air Force facility located in the Knob Hill neighborhood of Colorado Springs, Colorado. The building associated, but not within the Ent Air Force Base complex, was leased by the military for several decades and was headquarters of several military commands, starting with the Air Defense Command (ADC) and the North American Aerospace Defense Command (NORAD). When Chidlaw was completed, personnel from multiple locations, including the Ent Air Force Base, were consolidated into the new building. In 1993, the building was renovated into an office building and was successful with the presence of Premiere Global Services (PGi) as its main tenant. Since PGi moved out in 2011, the building has been at 45% occupancy and its main tenant has been Time Warner Cable's customer service center. The building went into foreclosure in 2012. ==Background== By April 1958, North American Aerospace Defense Command (NORAD) informed the Joint Chiefs of Staff of the need for a Ballistic Missile Early Warning System (BMEWS) to be located in a new, underground Combat Operations Center in the Colorado Springs, Colorado area. Building the Combat Operations Center within a granite mountain in the Colorado Springs area was shown to be the best solution at the lowest cost. NORAD also concluded that it was important to have related commands nearby, such for joint planning and combat readiness, but not so close that they could be destroyed easily at the same time. On March 18, 1959, and upon review of findings by the Corps of Engineers, the Joint Chiefs of Staff determined that Cheyenne Mountain should be the location of the underground facility (Cheyenne Mountain Complex). While the construction was performed, an interim location for the Zone of Interior BMEWS equipment was to be established in the basement of a building near the base. That way, BMEWS equipment could be utilized as early as 1961 and until the new Combat Operations Center was completed. NORAD said that the only initial active Advanced Intercontinental Ballistic Missile (AICBM) system that could be ready in sufficient numbers to be effective by 1964 was the Nike Zeus, which would integrate the use of radar, anti-missile missiles and atomic warheads. In December 1958, NORAD called for the hasty development of the anti-Intercontinental ballistic missile (ICBM) system, the WS-117L reconnaissance satellite. The Clear Air Force Station system in Alaska was scheduled to be completed in 1961, but the hardened Combat Operation Center would not be operations until sometime after that. So, an interim BMEWS central display facility was built as an annex to the Ent Combat Operation Center. It would not, though, have an interim satellite prediction computer, that that would be placed in the new Cheyenne Mountain facility. In the meantime, each radar site's computer would make its own calculations. The Ent Air Force Base COC annex would not be completed until December 1960, so an interim solution was to be implemented at Thule by September 1960 and until December 1960. SPADATS was transferred to NORAD and CONAD command in November 1960 and was activated at the Ent Air Force Base on February 14, 1961 by the 1st Aerospace Surveillance and Control Squadron, which was also responsible for the operation of the BMEWS Central Computer and Display Facility in the NORAD Operations Center. SPADATS was dedicated at Ent on July 3, 1961, just a few months after excavation began on Cheyenne Mountain. The plan to use an off-base leased facility was implemented for the Combined Operations Center when the Cheyenne Mountain Air Force Station was delayed and an earlier Semi-Automatic Ground Environment command post was needed as an interim Air Defense Operations Center for combining NORAD's attack warning and CONAD's weapons direction missions. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chidlaw Building」の詳細全文を読む スポンサード リンク
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