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EXCEL - IDEA: XBRL DOCUMENT - TRI VALLEY CORPFinancial_Report.xls
10-Q - TRI-VALLEY CORP. 10-Q - TRI VALLEY CORPa50067716.htm
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EX-31.2 - EXHIBIT 31.2 - TRI VALLEY CORPa50067716ex31_2.htm
EX-32.2 - EXHIBIT 32.2 - TRI VALLEY CORPa50067716ex32_2.htm
EX-31.1 - EXHIBIT 31.1 - TRI VALLEY CORPa50067716ex31_1.htm
EX-32.1 - EXHIBIT 32.1 - TRI VALLEY CORPa50067716ex32_1.htm
v2.3.0.15
ASSET RETIREMENT OBLIGATIONS
9 Months Ended
Sep. 30, 2011
ASSET RETIREMENT OBLIGATIONS
NOTE 5 – ASSET RETIREMENT OBLIGATIONS

At September 30, 2011, the Company’s total estimated undiscounted inflated costs to settle its asset retirement obligations were approximately $1.8 million. These costs are expected to be incurred between 2016 and 2040 and have been discounted using a 1.9% inflation rate and a weighted average credit-adjusted risk-free rate of 8% to 10%.

Asset retirement obligations, beginning of period
  $ 206,183  
Liabilities incurred
    151,943  
Accretion expense
    12,981  
Revisions in estimated cash flows
    (25,265 )
Asset retirement obligations, end of period
  $ 345,842