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  3. Mineral Resource Data System (MRDS)

Dobbas

Producer 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 10109201
MRDS ID M007314
Record type Site
Current site name Dobbas

Geographic coordinates

Point of reference Centroid
Geographic coordinates: -121.07251, 38.79051 (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)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pilot Hill(quadrangle 1:24,000 scale)

Sacramento(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

North Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 011N 008E 15,16,22 California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Nearby scientific data

Centroid (1) -121.07251, 38.79051
ListMap

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner D. J. Dobbas

Comments on the production information

  • CONSIDERABLE ACTIVITY DURING WWI; PROPERTY PROSPECTED IN 1941 AND SOME ORE WAS PRODUCED; SOME PRODUCTION IN 1942 AND 1944. A NUMBER OF ASSAYS SHOW THE ORE TO BE HIGH IN IRON.

Comments on the workings information

  • OPEN PITS AND SHALLOW SHAFTS.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 52, NO. 4, PP. 385-6, 467

  • Deposit

    D.O.M. BULL. 134, PT. III, CHAP. 4, PP. 146-148 AND PL. 8, 9

General comments

Subject category Comment text
Deposit ADIT SHOWN IN NW1/4 NW1/4 OF SEC. 22 ON USGS QUAD. PILOT HILL, CALIF. 1954, PROBABLY PART OF WORKINGS. THERE ARE FIVE PRINCIPAL ORE-BEARING AREAS. HOLDINGS OF ABOUT 900 ACRES. AREA A M SEC. 16 - SMALL, TON OF ORE ON DUMP.

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.