Over-the-Horizon Backscatter Radar Network, Christmas Valley Radar Site Transmit Sector Four Transmitter Building, On unnamed road west of Lost Forest Road, Christmas Valley, Lake County, OR

Significance: The Over-the-Horizon Backscatter radar network was an important physical and scientific product of the Cold War. From theories that had been conceived in the days of early long-distance radio transmissions, and building on over three decades of research into the subject, the network was a tremendous technological and military accomplishment. Although it was only starting operation as the Cold War was ending, the ability of a radar system to warn against low-flying aircraft at distances of up to 1,800 miles away was an amazing step forward in air defense.

This structure is one of three transmitter buildings that monitor the signals transmitted by the arrays in each sector. The building in sector four is the largest of the three transmitter buildings.

Survey number: HAER OR-154-A

military facilities military aircraft cold war radar tracking stations christmas valley or backscatter radar network christmas christmas valley radar site sector transmitter sector four transmitter road west lost forest lost forest road christmas valley lake county oregon historic american engineering record photo ultra high resolution high resolution library of congress

1969 - 1980

Library of Congress

http://www.loc.gov/

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