This excerpt taken from the ROSE 10-K filed Apr 20, 2006.
(9) Asset Retirement Obligations
Activity related to the Companys ARO during the years ended December 31, 2005 and 2004 is as follows :
Of the total ARO, approximately $0.4 million and $1.3 million are classified as a current liability at December 31, 2005 and 2004, respectively. For the six months ended December 31, 2005 (successor) and the years ended December 31, 2004 and 2003 (predecessor) the Company recognized depreciation expense related to its ARO of approximately $0.4 million, $1.5 million and $0.9 million, respectively. As a result of the adoption of SFAS No. 143 on January 1, 2003, Calpine recorded a $0.2 million increase in the net capitalized cost of its oil and natural gas properties as the cumulative effect of the change in accounting principle (net of related income tax benefit).