Calaveras Asbestos

Past Producer in Calaveras county in California, United States with commodities Asbestos, Water, Free
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. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10138664
MRDS ID M006413
MAS/MILS ID 0060091723
Record type Site
Current site name Calaveras Asbestos
Alternate or previous names American Asbestos, Jefferson Lake Asbestos, Asbestos Products Co.
Related records 10029067

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -120.5468, 37.93771 (WGS84)
Elevation 296
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

New Melones Dam(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Stanislaus(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001 N 013 E 16 E2 California

Comments on the location information

  • PROPERTY EXTENDS INTO SECTIONS 15 AND 21. THE MILL IS IN SEC. 21

Commodities

Commodity Importance
Asbestos Primary
Water, Free Tertiary

Materials information

Materials Type of material
Asbestos Unknown

Nearby scientific data

Ore Body (1) -120.5468, 37.93771

Economic information

Ore body information

  • Strike N20W
    Dip 20E
    Thickness 300M
    Length 716M
    Width 500M
    Depth to top 0M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 FISSURE VEIN
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 STOCKWORK
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 SILICIFICATION
    Strike And Dip N20W:20E
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 820119
  • Area 84HA
    Field Value
    Total Surface Area (HA) 84
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Non-metallic
Significant Yes
Discovery year 1904
Mining method Open Pit
Year of first production 1904
Milling method Sizing

Mineral rights holdings

Type of mineral rights Fee Ownership
Type of mineral rights Located Claim

Land status

Ownership category Mixed

Ownership information

  • Type Owner-Operator
    Owner Calaveras Asbestos Ltd.
    ID 402547
    Interest 100
    Home office California
    Year 1981

Comments on the production information

  • PRODUCTS IN 1B THRU 1D ARE MILLED FROM CONC.SHOWN IN P-UNC, THE CONC. IS FROM PRIMARY CRUSHER AND SCREEN

Comments on the reserve resource information

  • RESOURCE IN RECOVERABLE MT "OWNERS HOPE TO REOPEN THE QUARRY AS A DISPOSAL SITE FOR ASBESTOS-BEARING WASTE." 5/31/88
  • GRADE IS EXPRESSED IN PERCENT FIBER

Workings at the site

  • Type of workings Surface
    Area 36HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN PIT
    Swell Factor .64
    Percent Waste Rock 75
    Avg. Overburden Thickness 0
    Avg. Bench Height (meters) 6
    Max. Pit Slope (degrees) 45
    Capacity 4725
    Capacity Units MT ORE/DAY
    Unit Production Cost 5.28
    Units of Production $/MT ORE
    Operating Days per Year 240
    Operating Shifts per Day 3
    Year of Information 1981

Comments on the workings information

  • MILL IS OPERATED 12 MOS. PER YEAR. OVERBURDEN IS STRIPPED 12 MOS. PER YEAR. MINING IS CARRIED ON 10 MOS. PER YEAR, FEB.- DEC.

Reference information

Bibliographic references

  • Deposit

    ARGALL,GEORGE O. 1962, ASBESTOS AWAKENS MOTHER LODE AT THE

  • Deposit

    JEFFERSON LAKE MINE AND MILL: MINING WORLD;SEPT. 1962 P22-27

  • Deposit

    CALIFORNIA DIVISION OF MINES,1972,CALIFORNIA GEOLOGY,

  • Deposit

    ASBESTOS:VOL. 25 NO.10, P.220

  • Deposit

    CALIFORNIA DIVISION OF MINES, MINERAL COMMODITIES OF

  • Deposit

    CALIFORNIA. ASBESTOS: BULL. 176, PP 49-58

  • Deposit

    CLARK,WILLIAM B. 1962, MINES AND MINERAL RESOURCES OF

  • Deposit

    CALAVERAS COUNTY, CALIFORNIA: CALIF. DIV. MINES COUNTY RE-

  • Deposit

    PORT 2, P 20-21

  • Deposit

    CLIFTON,R.A. MINERAL COMMODITY SUMMARIES 1981: U.S. BUREAU

  • Deposit

    OF MINES

  • Deposit

    CLIFTON,RA, 1980, ASBESTOS CHAPTER: US BUMINES BULL. 671

  • Deposit

    CLIFTON, R.A. 1980, ASBESTOS CHAPTER: US BUMINES MINERALS

  • Deposit

    YEARBOOK, VOL. I, METALS AND MINERALS

  • Deposit

    HUTTL,JOHN, 1962, JEFFERSON LAKE, CALIFORNIA'S PREMIER AS-

  • Deposit

    BESTOS PRODUCER: E AND M.J. VOL. 163 NO. 10

  • Deposit

    HARBER,PETER, 1980, WHATS NEW AFTER ASBESTOS, NATIONAL WORK-

  • Deposit

    SHOP ON SUBSTITUTES FOR ASBESTOS, SPONSORED BY ENVIRONMENTAL

  • Deposit

    PROTECTION AGENCY AND CPSC: INDUSTRIAL MINERALS, SEPT. 1980

  • Deposit

    KELLEY,F.R., 1975, PACIFIC ASBESTOS CORPORATION EXAMINATION

  • Deposit

    REPORT: CALIF. DIV. MINES FILE DATA

  • Deposit

    KEY; WALLACE W., USE OF MINERAL FILLERS, GRANULES, AND ROOF-

  • Deposit

    ING ROCK IN CALIFORNIA ASPHALT-CONSUMING INDUSTRIES: USBM

  • Deposit

    IC 8300

  • Deposit

    LINN,ROBERT K., 1968, NEW IDRIA MINING DISTRICT: AIME ORE

  • Deposit

    DEPOSITS OF THE UNITED STATES, PART 2, CHAPTER 78, PP 1624

  • Deposit

    THRU 1649

  • Deposit

    MESSEL, MICHAEL J., 1947, EXAMINATION AND VALUATION OF

  • Deposit

    CHRYSOTILE ASBESTOS DEPOSITS OCCURRING IN MASSIVE SERPENTINE

  • Deposit

    AIME VOL. 173, PP 79-93

  • Deposit

    RICE, S.J., 1966, MINERAL RESOURCES OF CALIF: CALIF. DIV.

  • Deposit

    MINES BULL. 191, PP 86-93

  • Deposit

    PACIFIC GAS AND ELECTRIC COMPANY, 1962, MOTHER LODE

  • Deposit

    ASBESTOS: P.G. AND E. PROGRESS REPORT, VOL. NO. 39, NO. 12

  • Deposit

    U.S. BUREAU OPF MINES, 1962-1980, MINERAL INDUSTRIES OF

  • Deposit

    CALIFORNIA: VOL. II, AREA REPORTS, DOMESTIC

  • Deposit

    WEIBELT,F.J. AND M.CLAIR SMITH, 1959, A RECONNAISSANCE OF

  • Deposit

    ASBESTOS DEPOSITS IN THE SERPENTINE BELT OF NORTHERN

  • Deposit

    CALFIRONIA: U.S. BUREAU OF MINES IC 7860

  • Deposit

    RICE,SALEM J., 1963, CALIFORNIA ASBESTOS INDUSTRY: CALIF.

  • Deposit

    DIV. OF MINES AND GEOL., MINERAL INFORMATION SERVICE, VOL.

  • Deposit

    16, NO. 9

Reporter information

Type Date Name Affiliation Comment
Reporter 16-NOV-93 Mcmahan U.S. Bureau of Mines

Beyond USGS

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

Current status (per MSHA)

StatusAbandoned since 06/14/1985
MSHA mine ID0402547
Mine name (MSHA)Calaveras Asbestos Ltd (Pit)
Current operatorCalaveras Natural Resources Inc
Mine typeSurface (Metal / non-metal)

MSHA cross-reference per the original MRDS record. Mine status and operator reflect MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date. See the Mine Data Retrieval System for current status.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

Authoritative California resources

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