Aug 10 (Reuters) - Agl Energy Ltd AGL.AX
* Currently expects underlying profit after tax to be within range of $940 million to $1.04 billion in financial year ended 30 june 2018
* AGL has completed an independent review of its rehabilitation obligations across its entire portfolio
* Result of review is an increase in rehabilitation provisions held on agl's balance sheet of $69 million to a total of $307 million
* Impact of rehabilitation on co's fy18 underlying profit after tax will be $11 million as result of increased depreciation and interest expense