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California Historical Landmarks in San Francisco

California Historical Landmark 1002
Giant Powder Company Site
Glen Canyon Park

Giant Powder Company Site

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


We were unable to locate a commemorative marker for the Giant Powder Company.

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
Bloody Point, Modoc County
Bonner Grade, Modoc County
Brannan House, Sacramento
Butte Store, Amador County

California Star Newspaper Site, San Francisco
Chevra Kaddisha Cemetery, Sacramento
China Slough Site, Sacramento
Condemned Bar, Folsom Lake State Recreation Area
Crabtree (Lotta) Home, Grass Valley

Crocker Gallery, Sacramento Donner Monument, Truckee
Douglas Flat, Calaveras County
Eagle Theatre, Sacramento
Ebbetts Pass, Alpine County

Ebner's Hotel, Sacramento
Evans and Bailey Fight, Modoc County
Fort Janesville, Lassen County
Frémont's Camp, Modoc County
Frog Woman Rock, Mendocino County

Giant Powder Company Site, San Francisco
Golden Gate Bridge, San Francisco and Marin Counties
Grange Hall Site, El Dorado County
Hornitos, Mariposa County
Irishtown, Amador County

Jackson Gate, Amador County
Kirkwood's, Amador County
Lady Adams Building, Sacramento
Laurel Hill Cemetery Site, San Francisco
Long Wharf Site, San Francisco

Maiden's Grave, El Dorado National Forest
Marklee's Cabin Site, Markleeville
Marshall's Blacksmith Shop, Kelsey
Methodist Episcopal Church, Placerville
Mills Bank Building, Sacramento
Montez (Lola) Home, Grass Valley

Negro Hill, Folsom Lake State Recreation Area
Old Emigrant Trail, Modoc National Forest
Orleans Hotel Site, Sacramento
Overton Building, Sacramento
Parrott Block Site, San Francisco

Pioneer Hall, Jackson
Plymouth Trading Post, Plymouth
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
Sacramento Union Site, Sacramento
Sailing Launch Comet, Lathrop
Salmon Falls, Folsom Lake State Recreation Area

San Joaquin City Site, Tracy
Smartsville, Yuba County
Stage Coach and Railroad, Sacramento
Stone Corral, Calaveras County
Studebaker's Shop, Placerville

Sutter Creek, Amador County
Telegraph Hill, San Francisco
Transcontinental Railroad, Lathrop
Willms Ranch, Knights Ferry
Valley Springs, Calaveras County

Western Hotel, Sacramento

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Map of California Historical Landmarks in San Francisco