NOTE 12 - ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS

We had environmental and mine closure liabilities of $265.1 million and $226.9 million at December 31, 2012 and 2011, respectively. Payments in 2012 and 2011 were $2.4 million and $1.9 million, respectively. The following is a summary of the obligations as of December 31, 2012 and 2011:



	(In Millions)
	December 31,
	2012		2011
Environmental	$	15.7	$	15.5
Mine closure
LTVSMC	18.3		16.5
Operating mines:
U.S Iron Ore	81.2		74.3
Eastern Canadian Iron Ore	88.9		68.0
Asia Pacific Iron Ore	22.4		16.3
North American Coal	38.6		36.3
Total mine closure	249.4		211.4
Total environmental and mine closure obligations	265.1		226.9
Less current portion	12.3		13.7
Long term environmental and mine closure obligations	$	252.8	$	213.2

Environmental

Our mining and exploration activities are subject to various laws and regulations governing the protection of the environment. We conduct our operations to protect the public health and environment and believe our operations are in compliance with applicable laws and regulations in all material respects. Our environmental liabilities of $15.7 million and $15.5 million at December 31, 2012 and 2011, respectively, including obligations for known environmental remediation exposures at various active and closed mining operations and other sites, have been recognized based on the estimated cost of investigation and remediation at each site. If the cost only can be estimated as a range of possible amounts with no specific amount being more likely, the minimum of the range is accrued. Future expenditures are not discounted unless the amount and timing of the cash disbursements readily are known. Potential insurance recoveries have not been reflected. Additional environmental obligations could be incurred, the extent of which cannot be assessed.

As discussed in further detail below, the environmental liability recorded at December 31, 2012 and 2011 primarily is comprised of remediation obligations related to the Rio Tinto mine site in Nevada where we are named as a PRP.

The Rio Tinto Mine Site

The Rio Tinto Mine Site is a historic underground copper mine located near Mountain City, Nevada, where tailings were placed in Mill Creek, a tributary to the Owyhee River. Site investigation and remediation work is being conducted in accordance with a Consent Order dated September 14, 2001 between the NDEP and the RTWG composed of the Company, Atlantic Richfield Company, Teck Cominco American Incorporated and E. I. duPont de Nemours and Company. The Consent Order provides for technical review by the U.S. Department of the Interior Bureau of Indian Affairs, the U.S. Fish and Wildlife Service, U.S. Department of Agriculture Forest Service, the NDEP and the Shoshone-Paiute Tribe of the Duck Valley Reservation (collectively, "Rio Tinto Trustees"). In recognition of the potential for an NRD claim, the parties actively pursued a global settlement that would include the EPA and encompass both the remedial action and the NRD issues.

The NDEP published a Record of Decision for the Rio Tinto Mine, which was signed on February 14, 2012 by the NDEP and the EPA. On September 27, 2012, the agencies subsequently issued a proposed Consent Decree, which was lodged with the U.S. District Court for the District of Nevada and opened for 30-day public comment on October 4, 2012. Under the terms of the Consent Decree, RTWG has agreed to pay $25 million in cleanup costs and natural resource damages to the site and surrounding area. The Company's share of the total settlement cost, which includes remedial action, insurance and other oversight costs is anticipated to be approximately $12.0 million.

Under the terms of the Consent Decree, the RTWG will be responsible for removing mine tailings from Mill Creek, improving the creek to support redband trout and improving water quality in Mill Creek and the East Fork Owyhee River. Previous cleanup projects included filling in old mine shafts, grading and covering leach pads and tailings, and building diversion ditches. NDEP will oversee the cleanup, with input from EPA and monitoring from the nearby Shoshone-Paiute Tribes of Duck Valley.

We have an environmental liability of $11.5 million and $10.0 million in the Statements of Consolidated Financial Position as of December 31, 2012 and 2011, respectively, related to this issue.

Mine Closure

Our mine closure obligation of $249.4 million and $211.4 million at December 31, 2012 and 2011, respectively, includes our four consolidated U.S. operating iron ore mines, our two Eastern Canadian operating iron ore mines, our Asia Pacific operating iron ore mine, our six operating North American coal mines and a closed operation formerly known as LTVSMC.

Management periodically performs an assessment of the obligation to determine the adequacy of the liability in relation to the closure activities still required at the LTVSMC site. The LTVSMC closure liability was $18.3 million and $16.5 million at December 31, 2012 and 2011, respectively.

The accrued closure obligation for our active mining operations provides for contractual and legal obligations associated with the eventual closure of the mining operations. We performed a detailed assessment of our asset retirement obligations related to our active mining locations most recently in 2011, except for Asia Pacific Iron Ore, in accordance with our accounting policy, which requires us to perform an in-depth evaluation of the liability every three years in addition to routine annual assessments. Due to new legislation in Australia, the assessment for Asia Pacific Iron Ore was performed in 2012. For the assessments performed, we determined the obligations based on detailed estimates adjusted for factors that a market participant would consider (i.e., inflation, overhead and profit) and then discounted the obligation using the current credit-adjusted risk-free interest rate based on the corresponding life of mine. The estimate also incorporates incremental increases in the closure cost estimates and changes in estimates of mine lives. The closure date for each location was determined based on the exhaustion date of the remaining iron ore reserves. The accretion of the liability and amortization of the related asset is recognized over the estimated mine lives for each location.

The following represents a rollforward of our asset retirement obligation liability related to our active mining locations for the years ended December 31, 2012 and 2011:



	(In Millions)
	December 31,
	2012		2011
Asset retirement obligation at beginning of period	$	194.9	$	162.1
Accretion expense	17.6		15.7
Exchange rate changes	0.3		0.1
Revision in estimated cash flows	18.2		3.7
Payments	0.1		(0.7		)
Acquired through business combinations	—		14.0
Asset retirement obligation at end of period	$	231.1	$	194.9