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Long-Term Reclamation Liability and Retirement Obligation Asset
6 Months Ended
Jun. 30, 2016
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, 2016
 
December 31, 2015
Long-term reclamation liability — beginning of period
$
6,827,568

 
$
5,908,700

Additional obligations incurred

 
659,295

Accretion of reclamation liability
92,890

 
259,573

Long-term reclamation liability — end of period
$
6,920,458

 
$
6,827,568


 
Following is a reconciliation of the aggregate retirement obligation asset associated with our reclamation plan for our mining projects:
 
 
June 30, 2016
 
December 31, 2015
Retirement obligation asset — beginning of period
$
1,107,120

 
$
1,619,101

Additional obligations incurred

 
659,295

Amortization of retirement obligation asset
(414,997
)
 
(1,171,276
)
Retirement obligation asset — end of period
$
692,123

 
$
1,107,120