The Mammoth Bar is a gold mine located in Placer county, California at an elevation of 600 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 600 Feet (183 Meters)
Commodity: Gold
Lat, Long: 38.92056, -121.00444
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Mammoth Bar MRDS details
Site Name
Primary: Mammoth Bar
Secondary: Pacific Gold Dredging
Commodity
Primary: Gold
Secondary: Platinum
Tertiary: Osmium
Tertiary: Rhodium
Tertiary: Palladium
Tertiary: Iridium
Location
State: California
County: Placer
District: Upper American River Area
Land Status
Land ownership: Private
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.
Holdings
Not available
Workings
Not available
Ownership
Owner Name: El Dorado And Placer Counties Gold Mining And Power Co., Pacific Gold Dredging Co.
Years: 1910 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Deposit Type: Stream Placer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Mineral Deposit Model
Model Name: Placer Au-PGE
Orebody
Form: STREAM SEDIMENT DEPOSITS
Structure
Not available
Alterations
Not available
Rocks
Name: Gravel
Role: Host
Age Type: Host Rock
Age Young: Holocene
Analytical Data
Analytical Data: PGE SAMPLE ANALYZED: 37.22% PT, 34.72% IR, $28.02 AU, TR PD AND RH (LOGAN, P. 109). AU GRADES ESTIMATED AT 0.0048 OZ/YD (80 PPB)
Materials
Ore: Gold
Comments
Comment (Workings): DREDGING. DREDGERS NEAR MAMMOTH BAR.
Comment (Deposit): SEE ALSO: MRDS M045269.
Comment (Location): LOCATION GIVEN IS FOR WEST END OF BAR AT WEST EDGE OF SECTION. TOPO MAP HAS NO UTM COORDINATES
Comment (Production): IN EARLY YEARS OF DREDGING, PGE WERE NOT SAVED. GRAVELS PROBABLY AVERAGED GREATER THAN $0.10/YD AND BEDROCK GREATER THAN $1/YD
Comment (Deposit): DREDGING WAS CARRIED OUT ON BARS OF OLD HYDRAULIC TAILINGS. GRAVELS AVERAGED 28 FT DEEP
Comment (Geology): BEDROCK IS SLATE DECOMPOSED TO 1 FT DEPTH
Comment (Deposit): PACIFIC GOLD DREDGING CO. ALSO OPERATED ON THE NORTH FORK AMERICAN RIVER (SEE M045269) ; INFO.SRC : 1 PUB LIT
References
Reference (Deposit): LOGAN, C.A., 1919, PLATINUM AND ALLIED METALS IN CALIFORNIA: CALIFORNIA STATE MINING BUREAU BULLETIN 85, P. 29-30, 109.
Reference (Deposit): LOGAN, C.A., 1927, PLACER COUNTY: CALIFORNIA STATE MINING BUREAU, 23RD REPORT OF THE STATE MINERALOGIST, NO. 3, P. 284.
Reference (Deposit): WARING, C.A., 1919, PLACER COUNTY: CALIFORNIA STATE MINING BUREAU, 15TH REPORT OF THE STATE MINERALOGIST, PT. 3, P. 386.
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.
