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Long-Term Reclamation Liability and Retirement Obligation Asset
6 Months Ended
Jun. 30, 2014
Asset Retirement Obligation Disclosure [Abstract]  
Long-Term Reclamation Liability and Retirement Obligation Asset
Long-Term Reclamation Liability and Retirement Obligation Asset
 
Following is a reconciliation of the aggregate reclamation liability associated with our reclamation plan for our mining projects:

 
June 30,
2014
 
December 31,
2013
Long-term reclamation liability — beginning of period
$
5,424,410

 
$
4,597,156

Additional obligations incurred

 
531,770

Accretion of reclamation liability
171,943

 
295,484

Long-term reclamation liability — end of period
$
5,596,353

 
$
5,424,410


 
Following is a reconciliation of the aggregate retirement obligation asset associated with our reclamation plan for our mining projects:
 
 
June 30,
2014
 
December 31,
2013
Retirement obligation asset — beginning of period
$
2,491,956

 
$
2,803,318

Additional obligations incurred

 
531,770

Amortization of retirement obligation asset
(502,810
)
 
(843,132
)
Retirement obligation asset — end of period
$
1,989,146

 
$
2,491,956