Significant Dates in the History of Gold Mining in California

  
Posted July 16, 2009 in Gold Mining
Publication Info: Gold Districts of California Bulletin 193 California Division of Mines and Geology 1976 Table of Contents

1775-1780 The first known discovery of gold in California was made in the Potholes district, Imperial County. Mining extended into the Cargo Muchacho and Picacho districts.
1828 A small placer gold deposit was found at San Ysidro, San Diego County.
1835 The placer deposits in San Francisquito Canyon, Los Angeles County, were discovered.
1842 Gold was discovered in Placerita Canyon, Los Angeles County. Some sources give the date of this discovery as 1841.
1848 Gold was discovered at Sutter's Mill at Coloma on the American River by James Marshall. Although the exact date has been the subject of some discussion, it is officially designated as January 24. The first printed notice of the discovery was in the March 15 issue of "The Californian" in San Francisco. Shortly after Marshall's discovery General John Bidwell discovered gold in the Feather River and Major Pearson B. Reading Found gold in the Trinity River. The gold rush was soon in Full sway as thousands of gold seekers poured into CaliFornia.
1849 Quartz mining began at the Mariposa mine, Mariposa County. A stamp mill, probably the First in the state, was installed.
1850 Gold-bearing quartz was Found at Gold Hill at Grass Valley. This led to the development of the great underground mines in that district and a major industry that continued for more than 100 years.
1851 Gold was discovered in Greenhorn Creek, Kern County. This discovery led to the rush to the upper Kern River region.
1852 California's annual gold production reached an all-time high of $81 million.
1852 Hydraulic mining began at American Hill just north of Nevada City, Nevada County, and at Yankee Jims, Placer County.
1852 The first extensive underground mining of buried river channels commenced in the Forest Hill district, Placer County.
1853 The placers at Columbia, Tuolumne County, began to yield vast amounts of gold. This continued until the early 1860s. At that time Columbia was one of the largest cities in the state.
1853 The Fraser River rush in British Columbia caused a partial exodus of miners from the state.
1854 A 195-pound mass of gold, the largest known to have been discovered in California, was found at Carson Hill, Calaveras County.
1855 The rich surface placers were largely exhaused by this date and river mining accounted for much of the state's output until the early 1860's. All of the rivers in the gold regions were mined.
1859 The famous 54-pound Willard nugget was found at Magalia, Butte County.
1859 The Comstock silver rush began in Nevada. This development caused a large exodus of gold miners from California. However, it stimulated gold and silver prospecting in eastern and southeastern California.
1864 By this time Caljfornia's gold rush had ended. The rich surface and river placers were largely exhausted; hydraulic mines were the chief sources of gold For the next 20 years.
1868 The fjrst air drills were introduced. However, widespread use of air drills in mining did not come for another 30 years.
1876 The stampede to the Bodie district in Mono County began. This rush lasted until about 1888.
1880 Hydraulic mining reached its peak in the state. Vast systems of reservoirs, tunnels, ditches, flumes, and pipelines supplied water to these operations.
1883 Gold production figures began to be collected for the calendar year instead of the fiscal year.
1884 Sawyer Decision. In the case of Woodruff vs. North Bloomfield Gravel Mining Company, Judge Lorenzo Sawyer issued a decree prohibiting the dumping of debris into the Sacramento and San Joaquin Rivers and their tributaries. Action against other hydraulic mines soon followed. A few mines constructed tailings storage dams and continued to operate, but hydraulic mining has not been important in the Sierra Nevada since. For a few years drift mines partially made up for the loss in output of surface placer gold.
1890 Beginning about this time and continuing for several decades, great improvements were made in mining and milling methods. These changes enabled many more lode deposits, especially large but low-grade accumulations, to be profitably worked. The improvement of air drills, explosives, and pumps, and the introduction of electric power lowered mining costs greatly. The introduction of rock crushers, increase in size of stamp mills, and new concentrating devices, such as vanners, lowered milling costs. Cyanidation was introduced in 1896 and soon replaced the chlorination processes.
1893 The Caminetti Act was passed creating the California Debris Commission. This commission licenses hydraulic mining operations in the Sierra Nevada. It is empowered to assess such mines to build debris dams.
1893 Gold was discovered in Galer Gulch in the El Paso Mountains in eastern Kern County. This led to other discoveries in the area and the influx to the Rand district, which began in 1895.
1898 The first successful bucket-line dredge was started on the lower Feather River near Oroville. Gold dredging soon became a major industry that continued for more than 65 years.
The lost, high-grade Tightner vein was rediscovered at Alleghany in Sierra County. Large amouts of rich are were taken from this vein, and mining activity, reviving in this district, continued until 1965. This was the last district in the state where gold mining was the chief industry.
1916 The general prosperity that began during World War 1 and continued until 1929, with accompanying high costs, caused a decrease in gold output.
1922 Argonaut disaster. A fire on the 3350-foot level at the Argonaut mine in the Jackson district, Amador County, caused the loss of 47 lives.
1929 Peak of post World War I boom. Lowest point in gold production since 1849.
1930 Gold production started to rise because of the depression and resulting low operating costs.
1933-1935 The price of gold increased from $20.67 to $35 per fine ounce. This rise ultimately resulted in a large increase in gold output and in much greater exploration activities.
1940 Gold output totaled nearly $51 million. This was the most valuable annual output since 1856. Thousands of miners were employed in the quartz mines at Grass Valley, Alleghany, Nevada City, Jackson, Sutter Creek, Jamestown, Mojave, and French Gulch. There were many active bucket-line dredges, and dragline dredges became important producers of placer gold.
1942 World War II caused a precipitous drop in gold output. War Production Board Limitation Order L-208, issued on October 8, caused the gold mines to be shut down.
1944 Gold production touched the lowest point since 1848.
1945 Order L-208 was lifted, effective July 1. Some of the bucket-line dredges resumed operations, but only a few important lode mines at Grass Valley, Alleghany, and Sutter Creek were reopened. Production increased slightly for 4 years.
Gold output resumed its decline because of rising costs and depletion of dredging gound. This trend was accelerated by the Korean War.
1953 The Central Eureka mine at Sutter Creek, the last major operating lode mine in the Mother Lode belt, was shut down.
1956 The mines of Empire-Star Mines Ltd., and Idaho-Maryland Mines, Inc., at Grass Valley were shut down. The industry of gold mining completed nearly 106 years of operation in this locality.
1960 Gold output fell below $5 million as the dredges continued to curtail operations.
1962 The last dredge of the Folsom field in Sacramento County was shut down, ending more than 60 years of operation. One of the last active lode-gold mines in California, the Sixteen-to-One in the Alleghany district, curtailed operations.
1963 The three large dredges of the Yuba Mining Division, Yuba Consolidated Industries-in the Hammonton district, Yuba County-were the only major sources of gold in the state. The small output from the substantial number of part-time prospectors, pocket miners, snipers, and skin divers did not offset the decrease in output from larger commercial operations. Several mines in the Alleghany district obtained U.S. Government exploration loans.
1964 The Brush Creek mine, a substantial source of gold in the Alleghany district, Sierra County, ceased operations.
1965 Governor Edmund G. Brown signed Senate Bill 265 designating gold as California's official state mineral. The Sixteen-to-One mine at Alleghany, Sierra County, was shut down at the end of the year. This was the last lode mine in the state that had been operated on a sustained basis.
1967 Two of the three remaining dredges at Hammonton were shut down.
1968 The last gold dredge at Hammonton was shut down on October 1. This was the last sustained commercial gold-mining operation in California
1968 The U.S. Treasury suspended purchases of newly-mined gold. The free market price rose to $44 an ounce early in 1969, falling by November to $38.50, because of greater stability in international currencies.


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A mine is a hole in the ground, owned by a liar.
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