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Mining Properties
9 Months Ended
Sep. 30, 2012
Mining Properties [Abstract]  
MINING PROPERTIES
MINING PROPERTIES
Mining properties consist of the following (in thousands):
September 30, 2012
Palmarejo
 
San
Bartolomé
 
Kensington
 
Rochester
 
Martha
 
Endeavor
 
Other
 
Total
Mining properties
$
151,373

 
$
70,099

 
$
331,697

 
$
114,639

 
$
11,416

 
$

 
$

 
$
679,224

Accumulated depletion
(74,974
)
 
(17,602
)
 
(39,204
)
 
(99,773
)
 
(11,416
)
 

 

 
(242,969
)
 
76,399

 
52,497

 
292,493

 
14,866

 

 

 

 
436,255

Mineral interests
1,658,389

 
26,642

 

 

 

 
44,033

 

 
1,729,064

Accumulated depletion
(221,027
)
 
(7,015
)
 

 

 

 
(14,168
)
 

 
(242,210
)
 
1,437,362

 
19,627

 

 

 

 
29,865

 

 
1,486,854

Non-producing and development properties

 

 

 

 

 

 
142

 
142

Total mining properties
$
1,513,761

 
$
72,124

 
$
292,493

 
$
14,866

 
$

 
$
29,865

 
$
142

 
$
1,923,251

December 31, 2011
Palmarejo
 
San
Bartolomé
 
Kensington
 
Rochester
 
Martha
 
Endeavor
 
Other
 
Total
Mining properties
$
134,296

 
$
68,684

 
$
321,456

 
$
112,826

 
$
12,643

 
$

 
$

 
$
649,905

Accumulated depletion
(53,060
)
 
(14,989
)
 
(27,160
)
 
(97,834
)
 
(10,373
)
 

 

 
(203,416
)
 
81,236

 
53,695

 
294,296

 
14,992

 
2,270

 

 

 
446,489

Mineral interests
1,658,389

 
26,642

 

 

 

 
44,033

 

 
1,729,064

Accumulated depletion
(158,627
)
 
(6,007
)
 

 

 

 
(10,034
)
 

 
(174,668
)
 
1,499,762

 
20,635

 

 

 

 
33,999

 

 
1,554,396

Non-producing and development properties

 

 

 

 

 

 
142

 
142

Total mining properties
$
1,580,998

 
$
74,330

 
$
294,296

 
$
14,992

 
$
2,270

 
$
33,999

 
$
142

 
$
2,001,027


Operational Mining Properties
Palmarejo Mine: Palmarejo is located in the State of Chihuahua in northern Mexico, and its principal silver and gold properties are collectively referred to as the “Palmarejo mine.” The Palmarejo mine commenced production in April 2009.

San Bartolomé Mine: The San Bartolomé mine is a silver mine located near the city of Potosi, Bolivia. The mineral rights for the San Bartolomé project are held through long-term joint venture/lease agreements with several local independent mining co-operatives and the Bolivian state owned mining organization, (“COMIBOL”). The Company commenced commercial production at San Bartolomé in June 2008.
Kensington Mine: The Kensington mine is an underground gold mine and consists of the Kensington and adjacent Jualin properties located on the east side of the Lynn Canal about 45 miles north-northwest of Juneau, Alaska. The Company commenced commercial production in July of 2010.
Rochester Mine: The Company has conducted operations at the Rochester mine, located in Western Nevada, since September 1986. The mine utilizes the heap-leaching process to extract both silver and gold from ore mined using open pit methods. Rochester’s primary product is silver with gold produced as a by-product.
Martha Mine: The Martha mine is an underground silver mine located in Argentina. Coeur acquired a 100% interest in the Martha mine in April 2002. Due to high operating costs and a short remaining expected mine life, the Company evaluated strategic and operational alternatives for the Martha mine and recorded an impairment charge of $6.0 million in the nine months ended September 30, 2012. The Martha mine ceased active mining operations in September 2012.
Mineral Interests
Endeavor Mine: In May 2005, CDE Australia Pty Ltd, (“CDE Australia”), a wholly-owned subsidiary of Coeur acquired the silver production and reserves, up to a maximum 17.7 million  payable ounces, contained at the Endeavor mine in Australia, which is owned and operated by Cobar Operations Pty. Limited (“Cobar”), a wholly-owned subsidiary of CBH Resources Ltd. (“CBH”). In March 2006, CDE Australia entered into an amended agreement under which it owns all silver production and reserves up to a total of 20.0 million payable ounces.
CDE Australia began realizing reductions in revenues in the fourth quarter of 2008 as a result of a silver price sharing provision that was part of the purchase agreement. CDE Australia has received approximately 4.1 million payable ounces to-date and the current ore reserve contains approximately 4.6 million payable ounces based on current metallurgical recovery and current smelter contract terms.
Non-Producing and Development Properties
Joaquin Project – Argentina: The Joaquin project is located in the Santa Cruz province of southern Argentina. The Company commenced exploration of this large property, consisting of over 28,450 hectares (70,300 acres), north of the Company's Martha silver mine, in November 2007. Since that time the Company has defined silver and gold mineralization in two deposits at Joaquin, La Negra and La Morocha, collectively referred to as the "Joaquin Project," and has recently commenced work on detailed drilling and other technical, economic and environmental programs which it expects will lead to completion of pre-feasibility and feasibility studies. The Company has not capitalized any expenditures associated with the Joaquin Project as of September 30, 2012. The Company has a 51% participating and managing equity interest in the Joaquin Project, and upon completion of a feasibility study, will have earned an additional 10% interest. The Company has further rights to increase its participating interest in the property to 71% subject to other conditions in the joint venture agreement.