Yuba County Gold Company

Site Name

Primary: Yuba County Gold Company
Secondary: Yuba Placer Gold Company

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Commodity

Primary: Gold
Tertiary: Silver

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Location

State: California
County: Yuba
District: Yuba River District

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Land Status

Land ownership: Unknown
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

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Holdings

Type: Unknown

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Workings

Type: Surface

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Ownership

Owner Name: Yuba Natural Resources Corp
Percent: 33.00
Info Year: 1983

Owner Name: St. Joe Gold
Percent: 67.00
Info Year: 1986

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Production

Year: 1986
Description: Gold Produced 600 Kilograms
Year: 1986
Description: Ore Processed 2277000 Cubic Meters
Year: 1986
Description: Total Material Mined 4079000 Cubic Meters
Year: 1984
Description: Total Material Mined 2959000 Cubic Meters
Year: 1983
Description: Gold Produced 353 Kilograms
Year: 1983
Description: Ore Processed 1999000 Cubic Meterss
Year: 1968
Time Period: 1904-1968
Description: Between 1904-1968 Over 1 Billion Cubic Yards Of Sand And Gravel Were Excavated 4800000 Oz Gold (1904-1968)
Year: 1984
Description: Gold Produced 476 Kilograms
Year: 1984
Description: Ore Processed 2214000 Cubic Meters
Year: 1985
Description: Gold Produced 707 Kilograms
Year: 1985
Description: Ore Processed 2398000 Cubic Meters
Year: 1985
Description: Total Material Mined 3905000 Cubic Meters

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Deposit

Record Type: Site
Operation Category: Plant
Plant Type: Beneficiation (Mill)
Plant Subtype: Gravity
Operation Type: Surface
Mining Method: Unknown
Year First Production: 1903
Discovery Year: 1903
Years of Production:
Organization:
Significant: N

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Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Trough

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Mineral Deposit Model

Not available

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Orebody

Not available

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Structure

Not available

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Alterations

Not available

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Rocks

Not available

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Analytical Data

Not available

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Materials

Unknown: Gold
Unknown: Silver

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Comments

Comment (Ownership): YUBA PLACER GOLD COMPANY IS A JOINT VENTURE BETWEEN PLACER SERVICE CORP., A WHOLELY OWNED SUBSIDIARY OF THE ST. JOE MINERALS CORP., WHICH IS A SUBSIDIARY OF FLUOR CORP., AND YUBA NATURAL RESOURCES, INC.

Comment (Economic Factors): DURING 1980 AND 1981, THE YUBA PLACER GOLD COMPANY RENOVATED AND REBUILT THE OLD YUBA DREDGE NO. 21. THE MOST MAJOR MODIFICATION WAS THE EXTENSION OF THE BUCKET LINE AND DIGGING LADDER, THUS ENABLING THE DREDGE TO DIG TO 140 FT BELOW THE WATER LEVEL INSTEAD OF THE PREVIOUS 107 FT. THE SECOND DEVELOPMENT PLAN CALLS FOR PRELIMINAY ENGINEERING WORK FOR RENOVATION AND RECONSTRUCTION OF DREDGE NO. 17 DURING 1984. ACTUAL CONSTRUCTION WORK IS SCHEDULED FOR 1985-1986. AROUND MID-1986, IT SHOULD BE READY FOR COMMISSIONING. IT WILL BE ABLE TO DIG TO DEPTHS OF 175 FT, ALLOWING MOST TRACK AREAS TO BE MINED TO BEDROCK, RECOVERING MOST OF THE HIGH GRADE PART OF THE DEPOSIT. THE SECOND DREDGE IS EXPECTED TO DOUBLE ANNUAL CAPACITY AND THE GOLD AND SILVER OUTPUT.

Comment (Reserve-Resource): INSITU RESERVES ARE ESTIMATED AT 68,462,000 METRIC TONNES OF ORE AT A GRADE OF 0.136 GM AU/MT AND 0.012 GM AG/MT. RECOV- ERABLE INDICATED TONNES ARE ESTIMATED TO BE THE SAME AS THE IN-SITU TONNES. THERE IS NO MINE DILUTION FACTOR, PER SE, IN A DREDGING OPERATION. MATRIX 1 COLUMN 3 DENOTES COMPANY RESOURCE ESTIMATES FOR THE DEPOSIT AS OF 1986. MATRIX 1 COLUMN 5 DENOTES COMPANY RESOURCE ESTIMATES FOR THE DEPOSIT AS OF 1987.

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References

Reference (Deposit): MORRISON-KNUDSON COMPANY, INC.-MINING GROUP. MINE DEPOSIT

Reference (Deposit): FILE REPORT, YUBA PLACER GOLD COMPANY, PLACER SERVICE CORP.

Reference (Deposit): YUBA COUNTY, CALIFORNIA. DRAFT REPORT, USBM CONTRACT NO.

Reference (Deposit): S0221028, SEPT 1983.

Reference (Deposit): ENGINEERING AND MINING JOURNAL. CALIFORNIA-GOLD DREDGING

Reference (Deposit): MAY BE RESUMED. DEC. 1979, P. 126.

Reference (Deposit): MINING CONGRESS JOURNAL. RESUMPTION OF DREDGING FOR GOLD.

Reference (Deposit): MAY 1980, P. 6.

Reference (Deposit): DREDGING OPERATION, YUBA COUNTY, CALIFORNIA, MAY, 1968.

Reference (Deposit): ENGINEERING AND MINING JOURNAL. CALIFORNIA-A GOLD DREDGING

Reference (Deposit): JOINT VENTURE. MAY 1980, P. 162.

Reference (Deposit): ENGINEERING AND MINING JOURNAL. CALIFORNIA-PLACER SERVICE

Reference (Deposit): CORP. NOV. 1980., P. 234.

Reference (Deposit): MINING CONGRESS JOURNAL. GOLD DREDGING ACTIVITIES OF PLACER

Reference (Deposit): SERVICE CORP. NOV. 1980.

Reference (Deposit): ENGINEERING AND MINING JOURNAL. A DISPUTE-YUBA GOLD FIELDS

Reference (Deposit): AND THE ARMY CORPS. OF ENGINEERS. AUG. 1981, P. 13.

Reference (Deposit): ENGINEERING AND MINING JOURNAL. CALIFORNIA-SUMMARY JUDGEMENT

Reference (Deposit): WILL BE GRANTED. SEPT. 1981, PP. 247, 251.

Reference (Deposit): SKILLING'S MINING REVIEW. APR. 17, 1982, P. 13.

Reference (Deposit): FLUOR CORPORATION, 1981 ANNUAL REPORT.

Reference (Deposit): ST. JOE MINERALS COMPANY, 1980 ANNUAL REPORT.

Reference (Deposit): USBM HEAVY METALS PROGRAM, SITUATION REPORT. HAMMONTON GOLD

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California Gold

"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.