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Long-Term Reclamation Liability and Retirement Obligation Asset
3 Months Ended
Mar. 31, 2017
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:

 
March 31, 2017
 
December 31, 2016
Long-term reclamation liability — beginning of period
$
7,353,346

 
$
6,827,568

Additional obligations incurred

 
340,000

Accretion of reclamation liability
16,083

 
185,778

Long-term reclamation liability — end of period
$
7,369,429

 
$
7,353,346


 
Following is a reconciliation of the aggregate retirement obligation asset associated with our reclamation plan for our mining projects:
 
 
March 31, 2017
 
December 31, 2016
Retirement obligation asset — beginning of period
$
617,126

 
$
1,107,120

Additional obligations incurred

 
340,000

Amortization of retirement obligation asset
(83,595
)
 
(829,994
)
Retirement obligation asset — end of period
$
533,531

 
$
617,126