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Hayden Hill Mine

Plant in Lassen county in California, United States with commodities Gold, Silver
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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. Mineral rights holdings
  10. Land status
  11. Ownership information
  12. Production statistics
  13. Reserves and resources
  14. Workings at the site
  15. Links to other databases
  16. Bibliographic references
  17. Reporter information

Geologic information

Identification information

Deposit ID 10236060
MRDS ID M009062
MAS/MILS ID 0060350025
Record type Site
Current site name Hayden Hill Mine
Alternate or previous names Lassen Eagle Mining Company, Juniper Gold Mine
Related records 10030722

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -120.87606, 40.99456 (WGS84)
Elevation 1774
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Lassen(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Silva Flat Reservoir(quadrangle 1:24,000 scale)

Eagle Lake(quadrangle 1:100,000 scale)

Susanville(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Pit(hydrologic unit)

Upper Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Lassen

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 037 N 009 E 36 California

Commodities

Commodity Importance
Gold Primary
Silver Primary

Nearby scientific data

Main Entrance (1) -120.87606, 40.99456
ListMap

Economic information

Economic information about the deposit and operations

Operation type Surface
Development status Plant
Commodity type Metallic
Significant Yes
Discovery year 1988
Mining method Open Pit
Year of first production 1992
Plant type Leach
Milling method Carbon-In-Pulp-Merrill-Crowe

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented

Land status

Ownership category Unknown

Ownership information

  • Type Owner-Operator
    Owner Lassen Gold Mining Inc.
    ID 0405159
    Interest 100
    Home office Colorado
    Year 1996
  • Type Owner
    Owner Amax Gold, Inc.
    Interest 100
    Home office Colorado
    Year 1996
  • Type Unknown
    Owner Hayden Hill Gold Mining Co.
    Home office California
    Year 1991

Production statistics

  • Year 1992
    Description Ore Production 11013948 Mt
  • Year 1992
    Description Silver Production 79696 Tr Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 2478823.02g
  • Year 1992
    Description Gold Production 28815 Tr Oz/Y
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 896246.8g
  • Year 1993
    Description Ore Production 10217267 Mt
  • Year 1993
    Description Silver Production 144438 Tr Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 4492524.58g
  • Year 1993
    Description Gold Production 53038 Tr Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 1649666.42g
  • Year 1994
    Description Ore Production @ 0.017 Tr Oz/St 12922500 St Ore
  • Year 1994
    Description Silver Production 135570 Tr Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 4216698.91g
  • Year 1994
    Description Gold Production 65785 Tr Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 2046142.49g
  • Year 1995
    Description Ore Production @ 0.024 Tr Oz/St 8522982 St Ore
  • Year 1995
    Description Silver Production 227125 Tr Oz/Yr Silver
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 7064378.12g
  • Year 1995
    Description Gold Production 80031 Tr Oz/Yr Gold
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 2489242.68g
  • Year 1996
    Description Ore Production @ 0.028 Tr Oz/St 8275944 St Ore
  • Year 1996
    Description Silver Production 320574 Tr Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Silver Silver 9970967.31g
  • Year 1996
    Description Gold Production 103502 Tr Oz/Yr
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 3219272.49g

Reserves and resources

  • Type In-situ
    Estimate year 1992
    Measured 40732382mt ore
    Demonstrated 40732382mt ore
    Total resources 40732382mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 1.09 g/mt Gold Major 1992
  • Type In-situ
    Estimate year 1995
    Demonstrated 17055000mt ore
    Total resources 17055000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.823 g/mt Gold Major 1995
  • Type In-situ
    Estimate year 1996
    Demonstrated 12995000mt ore
    Total resources 12995000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.93 g/mt Gold Major 1996
  • Type In-situ
    Estimate year 1996
    Demonstrated 9255000mt ore
    Total resources 9255000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.93 g/mt Gold Major 1996
    Silver Ag 7.54 g/mt Silver Major 1996
  • Type In-situ
    Estimate year 1997
    Demonstrated 5111986mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.994 g/mt Gold Major 1997

Comments on the reserve resource information

  • P + P RESERVES - 12/31/96, MINE MAY CLSOE LATE IN 1997; HEAP LEACH CONTINUING TO 1998; ADIT CAP BASED ON AVG 94-96 ST TON ORE MINED.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Capacity 19401
    Capacity Units MT ORE/DAY
    Unit Production Cost 3.03
    Units of Production $/MT ORE
    Operating Days per Year 302
    Operating Shifts per Day 2
    Year of Information 1992

Reference information

Bibliographic references

  • Production

    AMAX GOLD INCORPORATED, 1996 FORM 10-K, P6.

  • Reserve-Resource

    RANDOL MINING DIRECTORY, 1994/95, U.S. MINES AND MINING

  • Reserve-Resource

    COMPANIES, P229.

  • Reserve-Resource

    RANDOL MINING DIRECTORY, 1996/97, U.S. MINES AND MINING

  • Reserve-Resource

    COMPANIES, P157.

  • Reserve-Resource

    AMAX GOLD INC. 1996 FORM 10-K, P6.

  • Deposit

    CALIF. STATE MINING BUR. REPORT 12, 1894, P. 150-151.

  • Deposit

    CALIF. DIV. MINES BULLETIN 144, 1948, P. 258.

  • Deposit

    JOHN RAPP, CALIF. DIV. MINES AND GGEOL., PERSONAL COMMUN.,

  • Deposit

    1991.

  • Deposit

    RANDOL MINING DIRECTORY, 1990, 1992-93.

  • Deposit

    ROCKY MOUNTAIN PAY DIRT, JUNE 1992, P. 3A.

  • Deposit

    AMAX GOLD INC. ANNUAL REPORT 1991, 48P.

  • Deposit

    US BLM ENVIRONMENTAL IMPACT REPORT, HAYDEN HILL MINING

  • Deposit

    PROJECT, LASSEN COUNTY, CALIF, SEPT 1991.

  • Deposit

    AMAX GOLD INCORPORATED 1995 FORM 10-K, P7.

Reporter information

Type Date Name Affiliation Comment
Reporter 25-AUG-97 Buckingham, David A. 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 08/12/2003
MSHA mine ID0405159
Mine name (MSHA)Hayden Hill Mine
Current operatorLassen Gold Mining Inc
Current controller (parent)Kinross Gold Corp
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.