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Central Hill Mine

Producer in Calaveras county in California, United States with commodity Gold
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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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Links to other databases
  10. Bibliographic references
  11. General comments
  12. Reporter information

Geologic information

Identification information

Deposit ID 10028742
MRDS ID M005913
Record type Site
Current site name Central Hill Mine
Alternate or previous names Barker Claim, Union Shaft Mine

Geographic coordinates

Point of reference Centroid
Geographic coordinates: -120.71354, 38.1997 (WGS84)
Relative position Original record had no geographic coordinates; these coordinates were derived from the PLSS description provided.

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

San Andreas(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Calaveras(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 004N 011E 11,12,13 California

Commodities

Commodity Importance
Gold Primary

Economic information

Comments on the geologic information

  • GEOL.DESC: VERTICAL DEPTH TO THE GRAVEL IS 136'; GRAVEL IS CEMENTED AND CONTAINS A FEW BOULDERS, IS FROM 50-75' WIDE AND 20' DEEP IN THE BOTTOM OF THE CHANNEL'S TROUGH. GOLD IS FOUND IN THE FIRST 3' OF BEDROCK AND THE 3' OF GRAVEL ABOVE BEDROCK; IS FROM PIN-HEAD TO WHEAT-GRAIN IN SIZE, WITH OCCASIONAL $3-$8 NUGGETS. RANGES FROM 818 TO 825 IN FINENESS.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No

Comments on the production information

  • ACTIVE MIDDLE TO LATE 1930S TOTAL OF 7 MEN EMPLOYED FOR ONE SHIFT. LAST PRODUCTION FROM UNION SHAFT 72 1/2 OZ.AU IN 1890.AU 370'SHAFT;TREND OF DRIFTING OPERATIONS IS NORTHWARD, DOWNSTREAM;ABT. 800'OF DRIFTING IN 1935 & SOME BREASTING DONE

Reference information

Bibliographic references

  • Deposit

    CALIF. V. 32, NO. 3, P. 335, 356 AND PL. 7

  • Deposit

    CALIF. COUNTY REPT. NO. 2, P. 190, 208, AND PL. C, AND P. 193

  • Deposit

    USGS GQ-222

General comments

Subject category Comment text
Deposit TAILINGS ON GQ-222 IN SE1/4 SEC. 11, E1/2 AND SW1/4 SEC. 12

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-72 Gere, W. U.S. Geological Survey

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.