California Historical Landmarks in San Francisco
California Historical Landmark 1002
Giant Powder Company Site
Glen Canyon Park
The first commercial manufacturing of dynamite in the U.S. occurred in what is now Glen Canyon Park. On March 19, 1868, the Giant Powder Company began production at its first manufacturing plant, under exclusive license from Alfred Nobel to produce his new explosive in America. The factory did not last long. On November 26, 1869, an explosion completely destroyed the entire facility, turning every one of the buildings on the place, and the surrounding fencing, into "hundreds of pieces," according to a newspaper account. The company moved its operations elsewhere, an action that was to be repeated again in the future under similar circumstances, until it moved to its permanent and final home at Point Pinole on San Pablo Bay.
Citation from California Office of Historic Preservation
Some Missing California Plaques
When we visited the following sites, we were unable to locate a California commemorative plaque.
At some sites, it appeared that a California plaque had never been erected. At other sites, there was a base, but the plaque itself was missing. Some sites without California plaques had other historic markers, but they did not note that the site is a California Historical Landmark.
Adams and Company Building, Sacramento
Bear Valley, Mariposa County
Big Bar, Amador and Calaveras Counties
Birthplace of Freemasonry in California , San Francisco
Booth Home Site, Sacramento
Brown Home, Red Bluff
Pony Express Remount Station, Woodfords
Portolá Camp October 24-26, 1769), San Gregorio State Beach
Portolá Camp October 28-29, 1769), Half Moon Bay
Rincon Hill, San Francisco
Sacramento Bee Building, Sacramento