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  3. Mineral Resource Data System (MRDS)

Hoff

Occurrence in El Dorado county in California, United States with commodity Chromium
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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. Economic information about the deposit and operations
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10029853
MRDS ID M007659
Record type Site
Current site name Hoff
Related records 10162874

Geographic coordinates

Geographic coordinates: -120.92502, 38.6089 (WGS84)
Relative position W1/2 (NW1/4?)

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Latrobe(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Cosumnes(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 008N 010E 30 California

Comments on the location information

  • LATITUDE-LONGITUDE determined using PLS and GIS.

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Nearby scientific data

(1) -120.92502, 38.6089
ListMap

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner Theresa Garibaldi

Comments on the production information

  • SAID TO HAVE PRODUCED 200 LONG TONS OF ORE CONTAINING 28 TO 33 PERCENT CR2O3 DURING WWI BUT PRODUCTION LISTED IN FEDERAL RECORDS AMOUNTS TO ONLY 107 LONG TONS. ABOUT 20 LONG TONS OF ORE REMAIN ON DUMP AND UNMINED RESERVES ARE NEARLY EXHAUSTED.

Comments on the workings information

  • OPEN CUT.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 52, NO. 4, P. 470

  • Deposit

    DOM BULL. 134, PT. 3, CHAP. 4, PP. 120-121 AND PL 8

General comments

Subject category Comment text
Deposit ORE IS COARSE-GRAINED AND RANGES FROM A MEDIUM-GRADE DISSEMINATED ORE TO NEARLY PURE CHROMITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 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.