Historic California Posts, Camps, Stations and Airfields
Corn Springs Gap Filler Annex SM-162B
Typical AN/FPS-14 Gap Filler Radar
"During the late 1950s another area of progress was the development and deployment of AN/FPS-14 and AN/FPS-18 gap-filler radars. Having a range of around sixty-five miles, these radars were placed in areas where it was thought enemy aircraft could fly low to avoid detection by the longer-range radars of the permanent and mobile radar networks. Gap-filler radar deployment peaked in December 1960 at 131 sites throughout the continental United States. Because the introduction of gap-filler radars alleviated the need for civilians to scan the skies for enemy bombers, the ADC disestablished the Ground Observer Corps on January 31, 1959."
Searching The Skies
USAF Air Combat Command
June, 1997
Typical floorplan of a Gap Filler Annex
SITE NAME: Corn Springs Gap Filler Annex (SM-162B)

LOCATION: Riverside County, California, approximately 40 miles west of Blythe, California.
SITE HISTORY: This 0.30 acre site was obtained by DOD in 1957. The site was used as an air defense command installation and assigned to Western Air Defense Force effective March 1, 1959. It was retransferred to the U.S. Department of the Interior on October 6, 1965.
Its mission was to cover an area that was blocked from the MPS-7 and MPS-14 radars at Vincent AFS/MCAS Yuma (SM-162) in Yuma, AZ. It was one of seven planned Gap Filler Annexes (five activated) located in southeast California and southwest Arizona assigned to that installation and manned by members of the 864th Aircraft Warning Squadron.
The building was demolished. Only the building's concrete pad and three radar-tower foundations/footings remain.
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Updated 23 June 2017