Mount Hebo Air Force Station Mount Hebo Air Force Station ( ADC ID : M - 100 , NORAD ID : Z - 100 ) is a closed United States Air Force General Surveillance Radar station . It is located east - southest of Hebo , Oregon , located at the top of Mount Hebo . It was closed in 1980 . Facilities . The station was 10 miles ( 16 km ) from the Pacific Ocean and some east of the coastal community of Hebo . Due to local orographic lift of the predominant westerly Pacific airflow , Mount Hebo is often rainy , windy , cold , and snowy . Three giant Air Force radome s , about in diameter and high , were destroyed by the elements : the first was constructed in 1962 and was destroyed by high winds on 12 Oct 1962 while yet incomplete ; the second was built in 1963 and was destroyed by lightning and high winds in Jan 1964 ; the third was a different design and constructed in 1965 , but it eventually succumbed to the winds in 1968 . The top of Mount Hebo is usually under a few feet of snow during the winter . Mount Hebo Air Force Station was a vital part of the Air Force Semi Automatic Ground Environment ( SAGE ) computer supported system for air defense . Available electronic equipment was able to support the detection , identification and destruction of enemy aircraft . This was accomplished by communications between the SAGE computers at Adair Air Force Station in Oregon and McChord Air Force Base in Washington , the radar and communications systems at Mount Hebo , and interceptor aircraft such as the supersonic F - 106 Delta Dart . Primary radar systems at Mt Hebo AFS included the FPS - 24 search radar , and the FPS - 26A and FPS - 90 height finder radars . The FPS - 26A was modified between 1967 and 1970 into the FSS - 7 Sea launched ballistic Missile ( SLBM ) sensor and tracking radar . When the third FPS - 24 radome was destroyed in 1968 , the FPS - 24 was replaced by an FPS - 27 search radar with a smaller radar antenna and radome . Connectivity to the SAGE system was through the FST - 2B . Ground to air radio communications were provided in two ways . First was digital data sent to the aircraft ( F - 106 ) via the GKA - 5 digital data link system ' s modified GRT - 3 UHF radio . Second was voice communications using the sites analog single channel GRT - 3 transmitters , GRR - 7 receivers and GRC - 27 multi - channel ( transmit and receive capable ) UHF radios . All radio equipment was located at the Ground - to - Air Transmitter Receiver ( GATR ) site . The largest building on the radar site was the , FPS - 24 radar tower . Surrounding this tower was a Radome Support Structure with a , radome to protect the 85 . 5 - ton FPS - 24 antenna from snow , ice , and high winds . In addition to the main facility , Mount Hebo operated several AN / FPS - 14 Gap Filler sites : Supporting infrastructure at the Mt Hebo AFS included 27 family homes in a housing area about 2 . 5 miles below the main site . A Ground - to - Air Radio site was about 3 miles to the east on Little Hebo . A paved access road led from the town of Hebo and climbed over 3000 feet in 8 . 5 miles with many curves and steep sections . Separate water systems were provided for the main site and the housing area . Separate sewer systems supported the main site , housing area , and GATR site . A power station with four 1000Kw diesel driven generators was available . Storage tanks were available for water at the main site and housing area . Diesel fuel storage tanks were available on the main site . Special purpose vehicles were assigned to support Mt Hebo AFS . Two 4 - wheel drive 40 passenger buses were used primarily for taking children to and from schools in Hebo and Cloverdale . An ambulance was available for emergencies . For winter weather conditions there was an arctic snow weasel with tracks , a towable 100 gallon water tank , a snow blower , 2 snow plows , a front end loader , and a road grader . Personnel . Mount Hebo was the home of the 689th Radar Squadron . Squadron responsibilities included operation and maintenance of the installed radar and communications equipment , and various support activities including food service , supply , power production , civil engineering , administration , transportation and personnel services . Available facilities included buildings for the radar and communications , barracks for personnel , family housing , a power plant , dining hall , gym , motor pool , and support activities . The radar station was like a small town . The 689th Radar Squadron was originally assigned to the SAGE Portland Air Defense Sector . Later it was realigned with the 25th Air Division SAGE at McChord AFB . Higher headquarters included the Fourth Air Force and Air Defense Command . Later , Detachment 2 of the 14th Missile Warning Squadron was activated at Mount Hebo to operate missile - warning radar . Deactivation . Between 1954 and 1972 , of land were acquired by the Air Force from private parties , the United States Forest Service ( USFS ) , and the General Services Administration ( GSA ) for use as the Mount Hebo aircraft warning and control radar station . Between 1972 and 1987 , the Air Force declared the property excess and the land was transferred to the GSA for disposal . The land is currently under the jurisdiction of the USFS ( Siuslaw National Forest , Hebo Ranger District ) , U . S . Department of Energy , and private parties . Before its final disposal , the GSA contracted to demolish the Air Force buildings . The Air Force equipment and facilities at Mount Hebo have been removed and the site returned to its natural state , except for an access road . A plaque is virtually all that remains of the radar station . It reads