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Chester Mining


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Chester Mining Company (CHMN)


Chester Mining Company (CHMN) was founded in Coeur d'Alene in 1900 to  explore the Chester property, just east of the Sunshine Mine, in the  heart of Idaho's world-famous Silver Valley. The property was later  operated by Sunshine Mining & Refining and was most recently  producing silver between 1961 through 1976. Chester paid shareholders a  substantial dividend while its property was in production.

Today, a reinvigorated Chester Mining is a unique mineral  exploration company with a strategy of acquiring properties in proven  mining districts and leasing them out to generate an income stream while  retaining speculative leverage to exploration success through royalty  interests.

Chester has approximately 4.4 million shares outstanding, positive working capital and no debt.

Chester stock trades on the OTC Market under the symbol "CHMN". Corporate highlights include: 

  • Renewal of the former Sunshine lease on the strategically-located Chester and Bismark properties to Sterling Mining Company.  
  • Acquisition of the Conjecture Mine, under lease to Shoshone Silver Mining Company.


Conjecture Mine


The Conjecture property consists of approximately 240 acres and  includes both patented and unpatented lode mining claims, located in the  Lakeview Mining District of northern Idaho, roughly 30 miles northwest  of the Coeur d'Alene Mining District.

Geologists have long noted similarities between the Precambrian  belt series (i.e., Wallace, St. Regis, Revett) of the Lakeview District  and those found in the world-class silver deposits of the Coeur d'Alene  mining district, and the same important ore minerals (tetrahedrite,  galena, sphalerite) define productive ore shoots in the Conjecture and  the Coeur d'Alene District. Within the Lakeview District, only the  Conjecture shaft has been driven deep enough to penetrate the less  favorable Wallace formation into the better quartzite units.

Both the Lakeview District and the Conjecture Mine have a history  of high-grade silver production from shallow workings dating to the late  1800s, though production on neighboring properties have occurred as  recently as 1987. 

The Conjecture Mine was discovered in 1895 and worked until the  early 1920s, producing an unrecorded quantity of high-grade silver ore  from the Graham and Spider adit levels. It was further developed by an  inclined shaft from the 100-foot to the 400-foot level and sporadically  worked until the mid 1950s. The Idaho Bureau of Mines and Geology  records 350 tons of concentrate processed at the Bunker Hill Smelter  from 1952 to 1954, averaging approximately 91 oz/t silver, 0.14 oz/t  gold and 4.5% lead.

In the late 1950s and early 1960s, Federal Resources invested  approximately $3 million dollars to extend the inclined shaft to the  700-foot level, sank a 2000-foot vertical shaft, and developed the 700-,  1000-, 1600- and 2000-foot levels along 2500 feet of strike, totaling  over 13,000 feet of workings. Federal Resources established a block of  mineralized material of 336,000 tons grading nearly 12 opt silver and  .02 opt gold, three percent zinc and 1/2 percent lead. Federal Resources  also listed an additional block of 370,000 tons of similar grade as a  possible block of mineralization between the levels, or a total of more  than 700,000 thousand tons of mineralized material.

Sunshine Mining unitized the Lakeview District during in the 1970s  and conducted further exploration and development work, but did not  produce any ore from Conjecture. 

An independent reserve report, prepared by registered professional  geologist Richard W. Morris in 1981, verified the earlier numbers for  Minerals Management, Inc., though this mineralized material does not  currently constitute a proven or probable ore reserve.

High-grade silver mineralization has been shown to extend laterally  for over two miles, and vertically for over 3000 feet in the Conjecture  Mine. 

The Conjecture property is currently under lease to Shoshone Silver Mining Company.

The Coeur d'Alene Mining District


North Idaho's prolific "Silver Valley" has been  buzzing with excitement since Sterling Mining took control of the  Sunshine Mine in June 2003. The Sunshine Mine is the richest silver mine  in American history with more than 360 million ounces of production  over the past century, within a district which has produced in excess of  1 billion ounces of silver. And yet, geologists estimate less than 15%  of the district has been explored using modern exploration techniques.

Chester owns two strategic claim groups in the immediate vicinity  of the Sunshine Mine:  the Chester and Bismark properties. Both claim  groups have been leased to Sterling Mining Company. In addition, Chester  owns 1/3 of the nearby Mineral Mountain Unitized Area, also under lease  to Sterling.

The Chester Property


The Chester property consists of a 100-acre parcel, completely  surrounded by the Sunshine Mine property and less than one mile east of  its Jewell Shaft.

Despite almost 100 years of continuous production at the Sunshine  Mine, having produced silver at grades exceeding on average 27.8 ounces  of silver per ton, there has been relatively limited exploration in the  upper levels of the mine due to the historical record of consistently  converting resources to reserves and production at the Sunshine Mine.

Since 1900, Chester Mining has been in the area, and is now in its  second century. For years, Chester Mining Company paid dividends derived  from its profit percentage of silver produced from the Chester property  area.

Chester Mining anticipates benefitting from Sterling Mining's  announced dual program for advancing its Sunshine Mine project:   Exploration in the "upper country" of the Sunshine Mine and  rehabilitation of the mine and restoration of power and services to  re-commerce mining in the "lower country".

The Bismark Property

 The Bismark property consists of a 75-acre parcel, adjacent to the  Sunshine Mine property and roughly one mile south-southwest of its  Jewell Shaft. The Bismark claims were developed by a 1500-foot access  drift from the surface and include over 1000 feet of lateral development  along the Bismark Vein. Under the prior lease, Sunshine Mining &  Refining drilled the property to explore the downward extension of the  Bismark Vein. Although mineralized vein material was intersected, along  with other veins and fault structures, detailed information regarding  grade and thickness were not disclosed. 

Other Properties

 For information regarding other properties, please contact Chester Mining. 

Contact Us

Chester Mining Officers:

 W.L. Campbell, CEO

Travis Campbell, President

Fred Rahn, Vice President/ Director

Corporate Address:

905 N. Pines Rd., Suite A, Spokane Valley, WA 99206, US

Phone: (800) 222-1505 Fax: 509-927-5051