MINES OF ALAMEDA, CONTRA COSTA, AND STANISLAUS COUNTIES

COAL

Alameda Co.

Harrisville 1862-1907 7 mi. SE of Livermore - Arroyo Seco Canyon
Population 100
Production 8500 tonns Mines: Livermore, Summit, Pen Daren
Transportation to the Sacramento & San Francisco areas

Tesla 1890 13 mi. SE of Livermore - Corral Hollow
Population 150
Production 300,000 tonns Mines: Pacific (1856)
Transported to the Alameda & San Joaquine R.R. at Stockton then barged to San Francisco

Other towns Hayward, San Leandro, San Lorenzo, Sunol, Berkeley and Oakland Hills

Contra Costa Co.

Black Diamond 1848- Late 1880's Mount Diablo area - Town of Pittsburg
Transported by barge to San Francisco area

Sommersville 1860-1885 Mount Diablo area
Population 600 Mines: Manhattan, Eureka, Union,Independent and Pittsburg
Transported to Pittsburg Landing then bargedto San Francisco

Nortonville 1861-1885 Mount Diablo area
Population 600
Transported to Black Diamond then barged to San Francisco

Stewartsville 1883 Mount Diablo area
Population 600 Mines: Central
Transported to Antioch by R.R. then barged to San Francisco

West Hartley Mount Diablo area
Population 600
Transported to Antioch by R.R. then barged to San Francisco

Pittsburg Landing - Warf on Los Mendanos Rancho 2 min E. of Pittsburg, had a Post Office known as Cornwall

MERCURY - Cinnabar and Metacinnabar

Contra Costa Co.

Mount Diablo
Ryne Mine 1875-1877 - Production 1058 flasks
Mt. Diablo Mine 1830-1952 - Production 11,317 flasks

CLAY

Alameda Co.
Corral Hollow - Carnege Fire brick used in most of Central California

MAGNESIUM - Magnesite

Stanislaus Co. Mines Road and Del Puerto Canyon Red Mountain near back side of Mt. Hamilton
Production was used as a source of Magnesium during Second WW

CHROMIUM - Chromite

Alameda Co.
Mines: Douglas and Newman Stanislaus Co. Del Puerto Canyon

COPPER

Contra Costa Co.

Clayton 1862-1908 50 deposits
Production was about 40,000 pounds Ore contained from $4.00 - $48.00 / tonn SILVER and $50.00 - $243.00 / tonn

GOLD

Alameda Co.

Dublin Gold was mined near old slater house

Gravel

Alameda Co

Production about $75,000,000 / year Contra Costa Co. Production about $10,000,000 / year