Montana Resources LLP
Montana Resources LLP is a privately owned American mining company that operates the Continental open-pit copper and molybdenum mine near Butte, Montana.
Last updated August 31, 2026
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Overview
Montana Resources LLP is an American mining company headquartered in Butte, Montana, and associated with The Washington Companies, the business group owned by Dennis Washington. Its principal and, according to the referenced account, only active mining operation is the Continental Pit, an open-pit mine producing copper and molybdenum in the Butte area. The operation is significant because it represents the continuation of large-scale mining in a city whose economic identity and historical development were closely tied to copper extraction. The company was formed in 1985 with the purpose of restarting copper mining at Butte. Mining had been interrupted after Anaconda Copper shut down its Butte operations several years earlier. Montana Resources subsequently reactivated the Continental mine in 1986. This made the company part of a broader effort to restore industrial activity at a historically important mining district rather than establish a wholly new mining region. The Continental Pit later closed in 2000 and reopened in the fall of 2003. The restart illustrates the cyclical nature of large-scale mining, where operations can be affected by ore economics, market conditions, development requirements, and operating decisions. The referenced material does not provide detailed information about the reasons for the 2000 closure or the terms of the later reopening, so those factors cannot be stated with certainty here. Montana Resources extracts copper and molybdenum from an open-pit deposit. Copper is the mine's principal identified metal, while molybdenum is a commercially important by-product or co-produced mineral used in alloying and industrial applications. The mine's reported 2006 reserve estimate was 364 million tonnes of remaining ore averaging 0.35 percent copper, 0.027 percent molybdenum, and 2.2 grams per tonne of silver. These figures describe the reserve position reported at that time and should not be treated as a current estimate. The company is a regional operating business rather than a widely distributed consumer brand. Its public identity is connected primarily to the Continental mine, employment in the Butte area, and the continuation of mining activity at a historically prominent site. The referenced material states that the company employed about 350 people, although no date is supplied for that figure and it should not be interpreted as a current headcount. No reliable information is provided in the supplied sources about revenue, production volumes, current reserves, executive leadership beyond ownership, environmental programs, or the company's present operating timetable. Montana Resources is therefore best characterized as a private U.S. mining operator focused on the extraction of copper and molybdenum from the Continental Pit.
History
Montana Resources LLP was formed in 1985 to restart copper mining in Butte, Montana. The decision came after Anaconda Copper had shut down its Butte mines, bringing a temporary end to the large-scale mining activity that had long served as the town's economic foundation and defining industrial presence. In 1986, Montana Minerals, the operating entity associated with the company's early revival effort, reactivated the Continental mine. The project restored production at a mine that had been idled by Anaconda Copper in 1983. The reopening made the Continental operation an important part of Butte's post-Anaconda mining history and preserved the district's role as a working metal-mining center. The Continental Pit did not operate continuously thereafter. It closed again in 2000 before reopening in the fall of 2003. The supplied reference does not explain the precise causes of the closure or identify the technical, commercial, or ownership arrangements behind the restart. It does establish that mining at the pit resumed after a multi-year interruption. Montana Resources is owned by businessman Dennis Washington as a unit of The Washington Companies. The company is headquartered in Butte and operates the Continental mine as an open-pit copper and molybdenum operation. The referenced description identifies the Continental Pit as the only active mining operation at Butte. The business consequently occupies a distinctive position in the local economy: it is both a private mining company and the operator of the principal active mine in a city historically shaped by copper production. A reserve estimate cited for 2006 described 364 million tonnes of remaining ore at average grades of 0.35 percent copper, 0.027 percent molybdenum, and 2.2 grams of silver per tonne. Those figures provide historical context for the scale and mineral composition of the Continental deposit, but they are not a substitute for a current technical report. The available material also states that the company employed approximately 350 people, without specifying the date or whether the figure referred to direct employees only. Beyond its ownership, location, operating history, and Continental Pit, the supplied sources provide limited detail about corporate governance, production levels, environmental management, expansion plans, labor relations, or current mine life. Montana Resources' documented history is therefore centered on the restoration, interruption, and subsequent resumption of copper mining at Butte's Continental Pit.
- 2006
Historical reserve estimate reported
[1]The remaining ore reserves at the Continental Pit were reported at 364 million tonnes, with average grades of 0.35 percent copper, 0.027 percent molybdenum, and 2.2 grams of silver per tonne.
- 2003
Continental Pit reopens
[1]Mining at the Continental Pit resumed in the fall of 2003.
- 2000
Continental Pit closes
[1]The Continental Pit closed again after its earlier reactivation. The supplied source does not state the reason for the closure.
- 1986
Continental mine reactivated
[1]Montana Minerals reactivated the Continental mine, restoring mining activity at the previously idled Butte operation.
- 1985
Montana Resources is formed
[1]Montana Resources LLP was formed with the objective of restarting copper mining in Butte, Montana.
- 1983
Anaconda Copper idles the Continental mine
[1]Anaconda Copper shut down or idled the Continental mine as part of the wider cessation of its Butte mining operations.
Products and positioning
A privately owned regional mining operator focused on maintaining and developing large-scale copper and molybdenum production at Butte's Continental Pit.
Base metal
Copper
Copper is the principal identified metal produced by Montana Resources at the Continental Pit. It is extracted through open-pit mining from the Butte deposit. The referenced historical reserve estimate gives the ore an average copper grade of 0.35 percent, but the supplied material does not specify annual production volumes, product forms, processing arrangements, or current output.
Industrial metal
Molybdenum
Molybdenum is produced alongside copper from the Continental Pit. The metal is commonly used in alloy and industrial applications, while the mine's historical reserve estimate reported an average molybdenum grade of 0.027 percent. The supplied sources do not identify current production quantities or the specific form in which Montana Resources markets this material.
Brand decisions
2003
Reopening of the Continental PitStrategyBackground
The Continental Pit had closed in 2000 following its earlier operating period.
Action taken
Mining operations at the pit were restarted in the fall of 2003.
Aftermath
The reopening re-established the Continental Pit as an active mining operation in Butte.
1985
Decision to restart copper mining at ButteStrategyBackground
The shutdown of Anaconda Copper's Butte mines had interrupted the city's established mining industry. Montana Resources was formed in that context to bring copper mining back into operation.
Action taken
The company was established to pursue the restart of mining at the Continental operation.
Aftermath
The Continental mine was reactivated in 1986, restoring active large-scale mining at the site.
Sources1 sources
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