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Eggling and Williams Mine

Past Producer in Tuolumne county in California, United States with commodities Chromium, Iron
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Mineral rights holdings
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10214582
MRDS ID W025944
MAS/MILS ID 0061090079
Record type Site
Current site name Eggling and Williams Mine
Alternate or previous names Mariano Ranch
Related records 10111224

Geographic coordinates

Point of reference Trench
Geographic coordinates: -120.4502, 37.87212 (WGS84)
Elevation 344
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Chinese Camp(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Tuolumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Tuolumne

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001 S 014 E 05 NESESE California

Commodities

Commodity Importance
Chromium Critical Tertiary
Iron Tertiary

Materials information

Materials Type of material
Chromite Unknown
Enstatite Unknown
Olivine Unknown
Penninite Unknown
Serpentine Unknown

Nearby scientific data

Trench (1) -120.4502, 37.87212
ListMap

Economic information

Ore body information

  • Thickness 19M
    Length 1300M
    Width 800M
    Area 9HA
    Depth to top 0M
    Field Value
    Type of Orebody #1 OTHER
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 DISSEMINATED
    Shape of Orebody #2 IRREGULAR
    Shape of Orebody #3 OTHER
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control LITHOLOGY
    Secondary Ore Control IGNEOUS
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 CARBONITIZATION
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Total Surface Area (HA) 9
    Date of Last Modification 820614

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1875
Year of first production 1900

Mining district

District name Chinese Camp Area

Mineral rights holdings

Type of mineral rights Other
Type of mineral rights Fee Ownership

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Eichelberger, William V.
    Interest 100
    Home office California
    Year 1976
  • Type Operator
    Owner G. H. Eggling And T. J. Williams(Last Operators-
    Home office California
    Year 1976
    Last year 1918

Comments on the production information

  • TOTAL PRODUCTION (1900-1918) 327 METRIC TONS.ORE AVERAGED 39 P CR2O3. RESERVES PROBABLY SMALL. ORE BODY DIMENSIONS ESTIMAT SIZE AND DISTRIBUTION OF WORKINGSORE ZONE CONSISTS OF SMALL, ED HIGH-GRADE ORE DEPOSITS-OVERALL GRADE OF ZONE IS LOW AND D NOT BE MINED AS A WHOLE. THE AVERAGE MINEABLE GRADE OF O MITE) IS 39 PERCENT AND IRON IS 10 PERCENT. INSUFFICIENT DATA FOR MATRIX CALCULATIONS.

Workings at the site

  • Type of workings Surface
    Area 1HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method OPEN PIT
    Swell Factor .6
    Avg. Overburden Thickness 0
    Hardness of Ore M-HARD ROCKS
  • Type of workings Underground
    Length 65M
    Overall depth 17M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Mining Method OPEN STOPE
    Swell Factor .6
    Hardness of Rock HARDROCK FISSURED WITH EXCESSIVE WATER
    Rock Characteristics MULTIPLE SYSTEMS OF WEAKNESS PLANES
    Rock Support Chars. UNSUPPORTING NO FLOW
    Mine Support Chars. TIMBER W/LAGGING CONCRETE-UNREINFOR
    Number of Shafts 3
    Number of Adits 1
    1st Condition of Workings CAVED AT PORTAL
    2nd Condition of Workings FLOODED

Reference information

Bibliographic references

  • Deposit

    CATER,F.W.1948 CR-TUOLUMNE.CAL DIV MINES BULL 134,PT.3,CHAP

  • Deposit

    19,PL 1. TALIAFERRO,N.L.,1918,COOP WAR MINERALS INVEST CAL.T

  • Deposit

    CO.NO.6 UNPUBLISHED.

  • Deposit

    ALSO IN SECS 4 5 9

Reporter information

Type Date Name Affiliation Comment
Reporter 05-NOV-1984 Unknown U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.