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  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

De Maria Mine

Past Producer in Placer 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. Land status
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10261540
MAS/MILS ID 0060610892
Record type Site
Current site name De Maria Mine
Alternate or previous names De Maria

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -120.77602, 39.02379 (WGS84)
Elevation 792
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Foresthill(quadrangle 1:24,000 scale)

Truckee(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

North Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Federal lands

Tahoe National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Placer

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 014 N 011 E 29 SW California

Comments on the location information

  • 6 MILES FROM FORESTHILL ON FRENCH MEADOW ROAD.

Commodities

Commodity Importance
Gold Primary

Nearby scientific data

Main Entrance (1) -120.77602, 39.02379
ListMap

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No

Land status

Ownership category Private

Ownership information

  • Type Owner-Operator
    Owner John Demaria
    ID 404468
    Home office California
    Year 1990

Reference information

Bibliographic references

  • Deposit

    CJMG V 32 NO 1 1936 P 44 USGS FOLIO 3 PLACERVILLE 15TH REPT

  • Deposit

    P 338

  • Deposit

    MSHA RPT DATED DEC 1980.

  • Deposit

    CALIF. DIV. MINES AND GEOL. SPECIAL PUBLICATION 103, 1990.

  • Deposit

    LOCATED ALSO IN SE1/4 SEC. 30.

Reporter information

Type Date Name Affiliation Comment
Reporter 22-FEB-1991 Lowe, Nathan T. 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)

StatusActive since 01/18/2023
MSHA mine ID0404468
Mine name (MSHA)Big Seam mine
Current operatorEagle's Nest Mining LLC
Current controller (parent)Focused Mining Enterprises LLC
Mine typeUnderground (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.

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.