Knob Hill Mine and Plant-Republic

The Knob Hill Mine and Plant-Republic is a silver and gold mine located in Ferry county, Washington at an elevation of 3,100 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Knob Hill Mine and Plant-Republic
Secondary: Knob Hill Mines
Secondary: Blaine Republic
Secondary: Republic Unit
Secondary: Knob Hill Mine & Plant

Commodity

Primary: Silver
Primary: Gold

Location

State: Washington
County: Ferry
District: Republic

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Type: Located Claim
Type: Patented

Workings

Type: Underground

Ownership

Owner Name: Hecla Mining Co.
Company ID: 4500365
Percent: 100.0
Home Office: Idaho
Info Year: 1983
Years: 1983 -

Production

Year: 1993
Description: Gold Production 49601 T Oz/Yr
Year: 1993
Description: Silver Priduction 276688 T Oz/Yr
Year: 1987
Description: Ore Mined 1486000 Mt Ore/Year
Year: 1986
Description: Ore Mined 1179000 Mt Ore/Year
Year: 1985
Description: Ore Mined 57000 Mt Ore/Year
Year: 1984
Description: Ore Mined 59000 Mt Ore/Year
Year: 1982
Description: Au And Ag Ore Mined 51300 Mt Ore
Year: 1981
Description: Au And Ag Ore Mined 53300 Mt Ore
Year: 1980
Description: Au And Ag Ore Mined 56900 Mt Ore
Year: 1979
Description: Au And Ag Ore Mined 39800 Mt Ore
Year: 1978
Description: Au And Ag Ore Mined (4/78-12/78) 21599 Mt Ore

Deposit

Record Type: Site
Operation Category: Plant
Plant Type: Leach
Plant Subtype: Flotation
Operation Type: Underground
Mining Method: Filled Stopes - Horiz Cut and Fill W/Tailings
Milling Method: Flotation
Year First Production: 1899
Discovery Year: 1896
Years of Production:
Organization:
Significant: Y
Deposit Size: M

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Unknown: Stephanite
Unknown: Silver
Unknown: Electrum

Comments

Comment (Workings): STATE HAZARDOUS SUBSTANCE SITE (CI) AFFECTED SURFACE WATER, METALS AS POLLUTANT IN IMPOUNDMENT, CONFIRMED. CONTACT: ALANA SCOTT, (509) 775-3241.

Comment (Production): IN 1995 THE FACILITY WAS CLOSED AND RECLAMATION BEGAN. THIS INCLUDED THE GOLDEN PROMISE MAS SEQ# 0530190460 & KNOB HILL DEPOSITS. THE TAILIGS POND IS BEING DEWATERED, 27 SHAFTS, STOPES AND ADITS/PORTALS ARE BEING CLOSED. COMPANY WILL SUBMIT FINAL CLOSURE PLAN IN 1996. THE ADJACENT PROPERTY, GOLDEN EAGLE, MAS SEQ 0530190073 & 0461 WAS OPTIONED TO SANTA FE PACIFIC GOLD. ALSO LISTED UNDER MINERAL PROPERTY FILE #30.5 AND USGS ID # M056017 1988 AU PROD. = 70,000 OZ. 1989 AU PROD. = 74,335 OZ FROM MILLING OF 75,290 MT ORE. 1989 RESERVE = 334,000 OZ CONT. AU.

Comment (Reserve-Resource): RESOURCE INFORMATION WAS ACQUIRED FROM PERSONAL COMMUNICATIONS AND HECLA MINING CO., 1986 THIRD QUARTER REPORT. ESTIMATED ORE RESERVES ARE BASED UPON PAST YEARLY REPORTED RESERVE FIGURES. TYPICALLY, ONLY LIMITED AMOUNTS OF RESERVES ARE PROVEN EACH YEAR, ONLY APPROXIMATELY ENOUGH TO REPLACE PRODUCTION.

Comment (Economic Factors): THE FLOTATION CONCENTRATES ARE PRESENTLY SOLD TO J. ARON AND COMPANY OF NEW YORK, WHO IN TURN HAS CONTRACTED METALLURGIE OVERPELT, S.A., HOBOKEN, BELGIUM FOR FINAL REFINING. ALL CONCENTRATES ARE SHIPPED TO BELGIUM WHERE 999+ FINE GOLD AND 999+ FINE SILVER ARE PRODUCED. DORE BARS FROM KNOB HILL ARE BELIEVED SENT TO HANDY AND HARMON IN CONNECTICUT FOR FINAL REFINING. HANDY AND HARMON LIKEWISE PRODUCE 999+ FINE GOLD AND 999+ FINE SILVER PRODUCTS.

References

Reference (Deposit): RANDOL MINING DIRECTORY, 1996/97, P326.

Reference (Deposit): AND 3.23 OZ AG/ST, WALLACE MINER P.3, 12/18/86.

Reference (Deposit): THROUGH 1985 4.3 MILLION ST OF ORE MINED, AT 0.557 OZ AU/ST,

Reference (Deposit): AND COST $2.2 MILLION , S-R P.C1, 1/11/87.

Reference (Deposit): GOLDEN PROMISE SHAFT IS 1300 FT DEEP,TOOK 8 MONTHS TO SINK,

Reference (Deposit): 1986 PRODUCTION 40000 OZ AU, S-R P.C1, 1/11/87.

Reference (Deposit): GOLD EXTRACTION COST $160/OZ, SPOKESMAN-REVIEW P.C1,1/11/87

Reference (Deposit): STATE OF WASHINGTON BUL. 37, PART 2, P 124.

Reference (Deposit): HECLA MINING COMPANY 1995 ANNUAL REPORT, P15.

Reference (Deposit): HECLA MINING COMPANY-ANNUAL REPORT, 1981.

Reference (Deposit): HECLA MINING COMPANY-ANNUAL REPORT, 1980.

Reference (Deposit): THE MINING RECORD. HECLAS MINING REPORTS LOSS FOR SECOND

Reference (Deposit): 1982.

Reference (Deposit): THE MINING RECORD. THE REPUBLIC PM DISTRICT, WA. MAR 23,1983

Reference (Deposit): THE MINING RECORD, LUCKY FRIDAY TOP GOLD PRODUCER. NOV 3,

Reference (Deposit): COMPANY. DEC. 16, 1981, P. 7.

Reference (Deposit): THE MINING RECORD.HECLA AND DAY MERGER-PREMIER SILVER MINING

Reference (Deposit): KNOB HILL MINE. BUMINES IC 7123, JUNE 1940, 29 P.

Reference (Deposit): COOPER, CORWIN L. MINING AND MILLING METHODS AND COSTS AT

Reference (Deposit): NEWER ORE DISCOVERIES. MARCH 1948, P. 56-59.

Reference (Deposit): ENGINEERING AND MINING JOURNAL. KNOB HILL MINE PROSPERS ON

Reference (Deposit): QUARTER RESULTS. AUG 5, 1981, P. 3.

Reference (Deposit): PP 87-91.

Reference (Deposit): BOM INFORMATION CIRCULAS #48, P16.

Reference (Deposit): VOL. 119, NO.9.

Reference (Deposit): COLVILLE ENG CO, FERRY COUNTY POWER SURVEY, FERRY CO PUD RPT

Reference (Deposit): MINING JOURNAL-PRESS. REPUBLIC WASHINGTON NEEDS CAPITAL.

Reference (Deposit): MEDIA AND CONTAMINATION REPORT, APR. 7, 1993.

Reference (Deposit): WASHINGTON DEPT. OF ECOLOGY TOXIC CLEANUP PROGRAM. AFFECTED

Washington Gold

"Where to Find Gold in Washington" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Washington.