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Little Bonanza Mine

Past Producer in San Luis Obispo county in California, United States with commodity Mercury
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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. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10117038
MRDS ID M055763
MAS/MILS ID 0060790085
Record type Site
Current site name Little Bonanza Mine
Alternate or previous names Alice Claim, Modoc Claim, Josephine
Related records 10040884

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -120.91738, 35.58856 (WGS84)
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

San Luis Obispo(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cypress Mountain(quadrangle 1:24,000 scale)

Paso Robles(quadrangle 1:100,000 scale)

San Luis Obispo(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Salinas(hydrologic unit)

Central California Coastal(hydrologic accounting unit)

Central California Coastal(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California San Luis Obispo

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 027 S 010 E 17 California

Commodities

Commodity Importance
Mercury Primary

Nearby scientific data

Main Entrance (1) -120.91738, 35.58856
ListMap

Economic information

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1862

Land status

Ownership category Unknown

Reference information

Bibliographic references

  • Deposit

    CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD, CENTRAL

  • Deposit

    COAST REGION. SURFACE WATER DEGRADATION BY INACTIVE

  • Deposit

    METAL MINES IN NORTHWEST SAN LUIS OBISPO COUNTY, CA,

  • Deposit

    DECEMBER 1993 (P. 8-10).

  • Deposit

    CALIF. JOUR. MINES AND GEOL., V. 35, 1939, P. 438.

  • Deposit

    U.S. GEOLOGICAL SURVEY BULLETIN 922-R, 1941, P. 548-549, 564-565.

  • Deposit

    U.S. BUREAU OF MINES IC 8252, 1965, P. 197.

General comments

Subject category Comment text
Environmental Factors THE LAS TABLAS CREEK MINES, PARTICULARLY THE BUENA VISTA AND KLAU MINES, ARE ACID MINE DRAINAGE PRODUCERS. CONTAMINANT DISCHARGE FROM MINES IN THE LAS TABLAS CREEK WATERSHED IS NOT UNIFORM THROUGH TIME AND IS RELATED TO SEASONAL CYCLES, ACTIVITY AT THE MINES, AND OTHER FACTORS. THE LOCATION OF CONTAMINANT PLUMES MIGRATING DOWNSTREAM, PARTICULARLY WITH SEDIMENT, CAN THEREFORE BE HIGHLY TIME DEPENDENT. MEAN AND MAXIMUM CONCENTRATIONS DETECTED IN WATER FROM THE ENTIRE LAS TABLAS CREEK WATERSHED DURING SAMPLING IN 1992 WERE COMPARED TO 1993 STANDARDS. MAXIMUM CONCENTRATIONS OF TOTAL COPPER, TOTAL CHROMIUM, TOTAL IRON, TOTAL LEAD, TOTAL MERCURY, TOTAL NICKEL, TOTAL ZINC, TURBIDITY, ALKALINITY, SODIUM, CHLORIDES, AND BORON EXCEEDED A VARIETY OF HUMAN FISH AND WILDLIFE, AGRICULTURAL, PLANT, AND NUISANCE STANDARDS.

Reporter information

Type Date Name Affiliation Comment
Reporter 23-NOV-1994 Ridenour, James U.S. Bureau of Mines

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.