Mount Diablo Beacon:

Mount Diablo Beacon: (HM1RHI)

Location: Walnut Creek, CA 94598 Contra Costa County
Country: United States of America

N 37° 52.909', W 121° 54.858'

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Inscription

Left Dark by War, Lighted in Remembrance

A large flashing light atop this rotunda once guided airplanes flying through the night skies of the Bay Area. Originally held aloft on a 75-foot tower erected by Standard Oil in 1928, it served as a crucial route-finding aid in the days before electronic navigation. Civilian Conservation Corps workers crowned this building with a 10-million candlepower light before the outbreak of World War II. After the 1941 attack on Pearl Harbor it was turned off amid fears it could guide the enemy in attacking the mainland.
Obsolete after the war, the beacon remained dark except for an annual December 7th lighting in memorial to those who died at Pearl Harbor.
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Details
HM NumberHM1RHI
Series This marker is part of the series
Placed ByCalifornia State Department of Parks and Recreation
Marker ConditionNo reports yet
Date Added Tuesday, April 5th, 2016 at 1:01pm PDT -07:00
Locationbig map
UTM (WGS84 Datum)10S E 595475 N 4193257
Decimal Degrees37.88181667, -121.91430000
Degrees and Decimal MinutesN 37° 52.909', W 121° 54.858'
Degrees, Minutes and Seconds37° 52' 54.54" N, 121° 54' 51.48" W
Driving DirectionsGoogle Maps
Area Code(s)925, 510, 707
Closest Postal AddressAt or near Summit Rd, Walnut Creek CA 94598, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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