Island Mountain

Past Producer in Trinity county in California, United States with commodities Copper, Gold, Silver
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. Ownership information
  11. Workings at the site
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10190697
MAS/MILS ID 0061050029
Record type Site
Current site name Island Mountain
Alternate or previous names Dahrman Group

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -123.49781, 40.03155 (WGS84)
Elevation 183
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Trinity(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Lake Mountain(quadrangle 1:24,000 scale)

Garberville(quadrangle 1:100,000 scale)

Redding(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Eel(hydrologic unit)

Northern California Coastal(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Trinity

Public Land Survey System information

Meridian Township Range Section Fraction State
Humboldt 005 S 006 E 15 California

Commodities

Commodity Importance
Copper Tertiary
Gold Tertiary
Silver Tertiary

Nearby scientific data

Main Entrance (1) -123.49781, 40.03155

Economic information

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1942

Mineral rights holdings

Type of mineral rights Patented
Type of mineral rights Other

Ownership information

  • Type Owner
    Owner John Mosier
    Home office California
    Year 1974

Workings at the site

  • Type of workings Underground
    Length 2721M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OTHER OPEN STOPE METHODS
    Percent Waste Rock 12
    1st Condition of Workings UNKNOWN
    Capacity 91
    Capacity Units MT ORE/DAY
    Unit Production Cost 16.69
    Units of Production $/MT ORE
    Operating Days per Year 357
    Operating Shifts per Day 3
    Year of Information 1970

Reference information

Bibliographic references

  • Deposit

    REF 1 MINERAL INDUSTRY LOCATION SYSTEM - MILS- COMPUTER DUM

  • Deposit

    CALIF.COPPER.

  • Deposit

    CALIF BULL 152 1950 P 314

  • Deposit

    REF 2 THE MINES HANDBOOK, VOL XVIII 1931.PUB BY MINES INFOR

  • Deposit

    BUREAU,INC. SUFFERN NEW YORK.P 588

  • Deposit

    REF 3 COPPER IN CALIFORNIA, BULL 144, DIV OF MINES, CALIF D

  • Deposit

    NAT. RESOURCES; DEC 1948. P 350. INCL 61 PLATES ON VA

  • Deposit

    COPPER MINES. GOOD BIBLIOGRAPHY.

  • Deposit

    REF 4 MOORE,LYMAN, 1970 COSTING REPORT FOR ISLAND MOUNTAIN.

  • Deposit

    NOT FIND A BACK UP FILE OTHER THAN A 12 X 24 ACCOUNTI

  • Deposit

    SHEET WITH PRODUCT AND RESERVE DATA WRITTEN ON IT.

  • Deposit

    REF 5 THE OFFICIAL RAILWAY GUIDE,1975 NO.4,NATIONAL RAILWAY

  • Deposit

    CATION COMPANY,424 WEST 33RD STREET, NEW YORK,NY 1000

General comments

Subject category Comment text
Deposit BASIC DATA LISTED IN REF 1 & 2 REC 030 DATA FROM MILS SYSTEM (REF 1). COMPANY CONTROLS LAND SEC 9,10,15 T5S R6E (HUMBOLDT B AND M LINE) PRELIMINARY COMMENTS. AFTER 2 YEARS OF PREPRODUCTION MINING CONTINUE FOR 4 YEARS, BASED ON 50% PROBABILITY RESERVE AND 90% MINING RECOVERY. REC 101 EST. LIFE 4YR AT 50% PROB LEVEL (ROW 1 COL 2) 145,00 MINE LIFE BASED ON PLANT CAPACITY-91MTPD, REC 151 REC 120 BASE YEAR 1970 USED FOR MINE COSTING. MINE CAPITAL COST TOTAL $2,452,000 (1970 DOLLAR VA AQUIS 50,000 EXPLOR 530,000 DEVEL 690,900 EQUIP 509,100 PLANT 503,100 WORK.CAP. 168,900 MINE OPERATING COST $16.69/MT REF 2, P.588 LIST OVER 3000 FEET OF WORKINGS. REC 151 REFER TO LEWIS CALCULATIONS- BASED ON LYMAN MOORE DA BASE YEAR 1970 USED FOR MILL COSTING.(1970 DOLLAR VA MILL CAPITAL COST TOTAL $1,234,500 PLANT & EQUIP 1,206,000 WORK,CAP 28,500 MILL OPERATING COST $ 3.05/MT

Reporter information

Type Date Name Affiliation Comment
Reporter 04-NOV-1983 Lewis, J.D. U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.