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  3. Mineral Resource Data System (MRDS)

Blake Brothers San Pablo

Occurrence in Contra Costa county in California, United States with commodities Stone, Sand and Gravel, Construction
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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 10029595
MRDS ID M007242
Record type Site
Current site name Blake Brothers San Pablo

Geographic coordinates

Geographic coordinates: -122.40466, 37.93684 (WGS84)
Relative position ON SAN PABLO RIDGE. PROBABLY THE WORKINGS SHOWN ABOUT A HALF MILE EAST OF CASTRO POINT ON USGS QUAD. SAN QUENTIN, CALIF. 1948.

Site location context

Political divisions (FIPS codes)

Contra Costa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

San Quentin(quadrangle 1:24,000 scale)

San Francisco(quadrangle 1:100,000 scale)

San Francisco(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Pablo 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 01N 05W 15,16 California

Commodities

Commodity Importance
Stone Primary
Sand and Gravel, Construction Primary

Materials information

Materials Type of material
Sand Ore

Nearby scientific data

(1) -122.40466, 37.93684
ListMap

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic
Significant No

Ownership information

  • Type Operator
    Owner Blake Brothers

Comments on the production information

  • OPERATION BEGAN IN 1907 AND NOW INCLUDES A QUARRY, ROCK CRUSHING AND SIZING PLANT, STORAGE BUNKERS, TRUCK AND BARGE-LOADING FACILITIES, READY-MIXED CONCRETE PLANT, AND HOT ASPHALT PLANT. PLANT HAS REPORTED CAPACITY OF 4,000 TONS PER DAY.

Comments on the workings information

  • OPEN PIT APPROX. 1500 FT. LONG BY 800 FT. WIDE BY 200 FT. HIGH.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. VOL. 47, NO. 4, OCT. 1951, PP. 585-6; V. 54, NO. 4, OCT., 1958, PP. 550-551, 575, 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.