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  3. Mineral Resource Data System (MRDS)

Highway 20 Site

Producer in Lake county in California, United States with commodity 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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Ownership information
  10. Links to other databases
  11. Bibliographic references
  12. Reporter information

Geologic information

Identification information

Deposit ID 10284879
MAS/MILS ID 0060330246
Record type Site
Current site name Highway 20 Site
Alternate or previous names Cache Creek Pit and Mill, Cache Creek Bar 1, Cache Creek Pit

Geographic coordinates

Point of reference Pit
Geographic coordinates: -122.55076, 38.0096 (WGS84)
Elevation 315
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Marin(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Novato(quadrangle 1:24,000 scale)

Napa(quadrangle 1:100,000 scale)

Santa Rosa(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 Lake

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 013 N 006 W 06 E2 California

Commodities

Commodity Importance
Sand and Gravel, Construction Primary

Nearby scientific data

Pit (1) -122.55076, 38.0096
ListMap

Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Non-metallic
Significant No

Ownership information

  • Type Owner-Operator
    Owner Hidden Valley Sand And Gravel, Inc.
    ID 0401930
    Home office California
    Year 1990

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    CALIF. DIV. MINES AND GEOL. MINEFILE DATABASE, JUNE 1993.

Reporter information

Type Date Name Affiliation Comment
Reporter 16-JUN-1993 Ridenour, James 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)

StatusAbandoned since 02/20/2025
MSHA mine ID0401930
Mine name (MSHA)Hidden Valley Sand & Gravel
Current operatorClearlake Lava Inc
Current controller (parent)Donald W Van Pelt
Mine typeSurface (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.