Mill Valley Air Force Station

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Mill Valley Air Force Station
Part of Aerospace Defense Command
Mount Tamalpais West Peak


Main gate signs: top, as active Air Force Station circa 1973 and
bottom, as FAA Joint Surveillance System (JSS) Facility J-33.
Type Long Range Radar Site
Coordinates 37°55′23″N 122°36′03″W / 37.923, -122.6007
Built 1950 - 1952
In use 1953 - 1980
Current
owner
Marin Municipal Water District

Mill Valley Air Force Station (MVAFS) was a United States Air Force installation on the West Peak of Mt. Tamalpais in Mill Valley, California[1]. Its primary purpose was the operation of the radar facilities on Mt. Tam and command and control of anti-aircraft missile systems around the Bay Area. MVAFS has stood largely vacant since the early 1980's and has seen various occupancy by the FAA.

Contents

[edit] History

The Federal Government entered a lease with the Marin Municipal Water District in 1942 to occupy the land atop Mt. Tam's West Peak and build an Army installation. Commissioned in 1953, the station operated until its final tenant unit, the 666th Radar Squadron, was deactivated in 1980. In 2005, the Federal Government's lease expired and the land was returned to the MMWD.

[edit] Current usage

Most people who have attended the annual Mountain Play have parked in a lot that once comprised part of MVAFS. The characteristic "golf balls" that dot the ridgeline of Mt. Tam are reminders of the station's legacy.

[edit] Air Force radar operations

The MVAFS radar operations area consisted of 3 radar sets with their support structures sited on Mount Tamalpais' west peak. The image to the right (from Mount Tamalpais' east peak) shows (left to right) the Semi Automatic Ground Environment (SAGE) search radar (white radome), the submarine-launched ballistic missile (SLBM) detection radar (grey/green radome) and the SAGE height finder radar (no radome).

[edit] SAGE radar operations

SAGE radar and station operations were 666th Radar Squadron's primary missions[1].

[edit] SAGE search radar

1973 AN/FPS-107.

[edit] SAGE height finder radar

1973 AN/FPS-90.

[edit] SAGE radar digitizer

AN/FST-2 replaced by AN/FYQ-47.

[edit] SLBM radar operation

SLBM radar operation was Detachment 3, 14th Missile Warning Squadron's primary mission[1].

[edit] SLBM detection radar

1973 AN/FSS-7 (fuzzy 7).

[edit] Army Nike missile operations

MVAFS hosted a United States Army Nike missile air defense control site (San Francisco Defense Area Site SF-90DC)[1][2][3] operated by the Army Air Defense Command Post for the 40th Artillery Brigade from 1959 until June 1971 and the 13th Air Defense Artillery Group from July 1971 to August 1974[1].

[edit] FAA JSS radar operations

MVAFS became Federal Aviation Administration (FAA) Joint Surveillance System (JSS) Facility J-33[2][4].

[edit] Station support area


[edit] References

[edit] See also

[edit] External links