| Deposit ID | 10190697 |
|---|---|
| MAS/MILS ID | 0061050029 |
| Record type | Site |
| Current site name | Island Mountain |
| Alternate or previous names | Dahrman Group |
| Point of reference | Main Entrance |
|---|---|
| Geographic coordinates: | -123.49781, 40.03155 (WGS84) |
| Elevation | 183 |
| Location accuracy | 100(meters) |
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)
| Country | State | County |
|---|---|---|
| United States | California | Trinity |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Humboldt | 005 S | 006 E | 15 | California |
| Commodity | Importance |
|---|---|
| Copper | Tertiary |
| Gold | Tertiary |
| Silver | Tertiary |
| Main Entrance (1) | -123.49781, 40.03155 |
|---|
| Operation type | Underground |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Significant | No |
| Discovery year | 1942 |
| Type of mineral rights | Patented |
|---|---|
| Type of mineral rights | Other |
| Type | Owner |
|---|---|
| Owner | John Mosier |
| Home office | California |
| Year | 1974 |
| Type of workings | Underground | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 2721M | ||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0061050029 |
REF 1 MINERAL INDUSTRY LOCATION SYSTEM - MILS- COMPUTER DUM
CALIF.COPPER.
CALIF BULL 152 1950 P 314
REF 2 THE MINES HANDBOOK, VOL XVIII 1931.PUB BY MINES INFOR
BUREAU,INC. SUFFERN NEW YORK.P 588
REF 3 COPPER IN CALIFORNIA, BULL 144, DIV OF MINES, CALIF D
NAT. RESOURCES; DEC 1948. P 350. INCL 61 PLATES ON VA
COPPER MINES. GOOD BIBLIOGRAPHY.
REF 4 MOORE,LYMAN, 1970 COSTING REPORT FOR ISLAND MOUNTAIN.
NOT FIND A BACK UP FILE OTHER THAN A 12 X 24 ACCOUNTI
SHEET WITH PRODUCT AND RESERVE DATA WRITTEN ON IT.
REF 5 THE OFFICIAL RAILWAY GUIDE,1975 NO.4,NATIONAL RAILWAY
CATION COMPANY,424 WEST 33RD STREET, NEW YORK,NY 1000
| 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 |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 04-NOV-1983 | Lewis, J.D. | U.S. Bureau of Mines |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.