California Historical Landmarks in Lake County
California Historical Landmark 428
Sulphur Bank Mine Site
State Highway 20 and Sulphur Bank Road
Clearlake Oaks
In Operation 1865-1957
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(Click Photos to Zoom)
This sulphur mine also became one of the most noted quicksilver producers in the world. First worked for sulphur in 1865, in four years it produced a total of 2,000,000 pounds - reopened and developed for quicksilver in 1873, it is credited with total output of 92,400 flasks, and was an important producer in World Wars I and II.
Citation from California Office of Historic Preservation
Sulphur Bank Mine closed in 1957. When we visited in 2005, it was a superfund site. One generation's cause for celebration is too often the next generation's source of regret.
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1957 Photograph
Center for Sacramento History
Frank Christy Collection, 1998/722/3712
(Click Photos to Enlarge)
We could not locate the commemorative plaque, but we did obtain a photograph from the Center for Sacramento History which shows that the plaque was dedicated in 1950 and was still in place in 1957.
Here's a list of other California Historical Landmarks which had no bear flag plaque when we visited them.