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  3. Mineral Resource Data System (MRDS)

O'Brien S-Bend

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. Reporter information

Geologic information

Identification information

Deposit ID 10029957
MRDS ID M007808
Record type Site
Current site name O'Brien S-Bend
Related records 10139515

Geographic coordinates

Geographic coordinates: -120.90103, 38.83157 (WGS84)
Relative position SE1/4 - 2 MI. N. OF COLOMA ON W. SIDE OF PERRY CREEK. LOCATED ON A STEEP , SOUTHEAST-FACING HILLSIDE.

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Coloma(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(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 011N 010E 06 California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Nearby scientific data

(1) -120.90103, 38.83157
ListMap

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner C. F. Gladwill

Comments on the production information

  • ACTIVE 1918 WHEN SEVERAL HUNDRED TONS OF ORE WAS PRODUCED AND IN 1942 WHEN ABOUT 3,000 TONS OF ORE WAS MINED BY THE VOLO MINING CO. VERY LITTLE ORE REMAINS.

Comments on the workings information

  • TWO ADITS AND A GLORY HOLE.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 52, NO. 4, P. 472

  • Deposit

    DOM BULL. 134, PT. 3, CHAP. 4, P. 156, PL. 8

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.