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Mile Rocks
State: CA
Year established: 1906
Latitude: 37 deg 47
min 33 sec N
Longitude: 122 deg 30
min 34 sec W
Height above sea level: 49 feet Original construction:
white caisson with orange bands Rebuilds:
 1966: lantern room and top 2 tiers of lighthouse dismantled and light replaced by rotating aero beacon; helicopter pad placed on top of tower foundation
Status:
automated in 1966, active aid to navigation
Light characteristic:
flashing white every 5 seconds, visible for 15 nautical miles, horn: 1 blast every 30 seconds lasting 2 seconds
More information:
http://www.lighthousefriends.com/light.asp?ID=77
U.S. Department of Homeland Security / United States Coast Guard, Light List, Volume 6 Pacific Coast and Pacific Islands, Pacific Coast and Outlying Pacific Islands, (Washington, DC: GPO, 2004), p. 5
Shanks Jr., Ralph C., Lighthouses of San Francisco Bay, (San Anselmo, CA: Costano Books, 1976), p. 65
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