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Roberts Sand Company Black Diamond

Producer in Contra Costa county in California, United States with commodity Silica
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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 10029544
MRDS ID M007151
Record type Site
Current site name Roberts Sand Company Black Diamond
Related records 10259966

Geographic coordinates

Geographic coordinates: -121.8841, 37.9574 (WGS84)
Relative position SE1/4

Site location context

Political divisions (FIPS codes)

Contra Costa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Clayton(quadrangle 1:24,000 scale)

Stockton(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Suisun Bay(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Contra Costa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001N 001E 05 California

Commodities

Commodity Importance
Silica Primary

Materials information

Materials Type of material
Sand Ore

Nearby scientific data

(1) -121.8841, 37.9574
ListMap

Economic information

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner Silver Sand Co.
    First year 1957

Comments on the production information

  • MINED AND PROCESSED SAND OVER A PERIOD OF NEARLY 25 YEARS, DURING WHICH TIME TOTAL PRODUCTION AMOUNTED TO 367,543 TONS OF SAND VALUED AT $1,347,630. WORKED FOR SAND 1925--49 BY COLUMBIA STEEL CO., ROBERTS ET AL; REOPENED BY SILVER SAND CO. IN 1957. OPERATIONS AT THIS PROPERTY WERE SUSPENDED IN NOVEMBER 1949.

Comments on the workings information

  • ROOM AND PILLAR METHOD UTILIZING HAND AUGER DRILLS.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. VOL. 47, NO. 4, OCT. 1951, PP. 583-4; V. 54, NO. 4, OCT. 1958, P. 554, 555, 580, PL.

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.