Quarterly report pursuant to Section 13 or 15(d)

ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS (Tables)

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ENVIRONMENTAL AND MINE CLOSURE OBLIGATIONS (Tables)
9 Months Ended
Sep. 30, 2018
Environmental Remediation Obligations [Abstract]  
Summary Of Mine Closure Obligations
The following is a summary of the obligations:
 
(In Millions)
 
September 30,
2018
 
December 31,
2017
Environmental
$
2.7

 
$
2.9

Mine closure1
174.6

 
168.4

Total environmental and mine closure obligations
177.3

 
171.3

Less current portion
2.9

 
3.6

Long-term environmental and mine closure obligations
$
174.4

 
$
167.7

 
 
 
 
1 Includes our active operating mines, our indefinitely idled Empire mine and a closed mine formerly operating as LTVSMC.
Asset Retirement Obligation Disclosure
The following represents a roll forward of our mine closure obligation liability for the nine months ended September 30, 2018 and for the year ended December 31, 2017:
 
(In Millions)
 
September 30,
2018
 
December 31,
2017
Mine closure obligation at beginning of period
$
168.4

 
$
187.8

Accretion expense
7.1

 
13.9

Remediation payments
(0.9
)
 
(5.6
)
Revision in estimated cash flows

 
(27.7
)
Mine closure obligation at end of period
$
174.6

 
$
168.4