Walnut Creek in Contra Costa County, California — The American West (Pacific Coastal)
What Are Those Towers For?
Mount Diablo has always been a guide and landmark to people far bellow, and so it became a natural location for many radio and transmission towers as well.
As early as 1928, the Standard Oil Company and U.S. Dept. of Commerce jointly constructed a 75-foot tall aviation beacon for commercial aviation that was visible for 100 miles.
As technologies change and the need for such towers diminishes, it is the long-term goal of Mount Diablo State Park to remove all towers from the summit.
1928 Standard Oil tower
The beacon produced a light equivalent to 10 million candles. It was later transferred to the Summit Building, where it remains to this day.
Special services antennae received and relayed police and fire and other emergency civil defense messages.
Location. 37° 52.864′ N, 121° 55.108′ W. Marker is in Walnut Creek, California, in Contra Costa County. Marker can be reached from Summit Road 11 miles north of Blackhawk Road, on the right when traveling north. Touch for map. Located in Mount Diablo State Park. Marker is in this post office area: Walnut Creek CA 94598, United States of America.
Other nearby markers. At least 8 other markers are within 4 miles of this marker, measured as the crow flies. Mount Diablo State Park (a few steps from this marker); Mt Diablo State Park Mount Diablo Beacon: (approx. ¼ mile away); Mount Diablo (approx. ¼ mile away); Blackhawk Ranch Quarry (approx. 2.3 miles away); History of Marsh Creek Springs (approx. 3.7 miles away); Old Marsh Creek Springs (approx. 3.7 miles away); Whitegate Farm (approx. 4 miles away). Touch for a list and map of all markers in Walnut Creek.
Also see . . . Mount Diablo State Park. (Submitted on April 29, 2017, by Michael Herrick of Southbury, Connecticut.)
Categories. • Air & Space • Communications • Science & Medicine •
Credits. This page was last revised on April 29, 2017. This page originally submitted on April 29, 2017, by Michael Herrick of Southbury, Connecticut. This page has been viewed 90 times since then and 2 times this year. Photos: 1, 2, 3, 4. submitted on April 29, 2017, by Michael Herrick of Southbury, Connecticut.