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Asset Retirement Obligations | 9 Months Ended
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Mar. 31, 2019
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligations | Asset Retirement Obligations Our asset retirement obligations represent the estimated present value of the amount we expect to incur to plug, abandon and remediate our producing properties at the end of their productive lives in accordance with applicable laws. The following is a reconciliation of the beginning and ending asset retirement obligations for the nine months ended March 31, 2019 and for the year ended June 30, 2018:
| March 31, 2019 |  | June 30, 2018
Asset retirement obligations — beginning of period | $ | 1,422,955 |  |  | $ | 1,288,743 |
Liabilities incurred | 31,268 |  |  | 44,700 |
Accretion of discount | 75,373 |  |  | 90,290 |
Revision of previous estimates | 53,731 |  |  | (778 | )
Asset retirement obligations — end of period | $ | 1,583,327 |  |  | $ | 1,422,955 |
Less current portion in accrued liabilities | (50,244 | ) |  | (35,539 | )
Long-term portion of asset retirement obligations | $ | 1,533,083 |  |  | $ | 1,387,416 |

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2175671 + Details
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