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Property, Plant and Equipment, Net
12 Months Ended
Dec. 31, 2012
Property, Plant and Equipment, Net [Abstract]  
Property, Plant and Equipment Disclosure
Property, Plant and Equipment, Net
Property, plant and equipment, net includes the following:
 
December 31
 
2012
 
2011
Coal lands and real estate:
 
 
 
NACoal
$
67.6

 
$
36.7

HBB
0.2

 
0.2

 
67.8

 
36.9

Plant and equipment:
 
 
 
NACoal
149.9

 
99.7

HBB
42.9

 
41.0

KC
29.5

 
29.1

NACCO and Other
4.3

 
6.5

 
226.6

 
176.3

Property, plant and equipment, at cost
294.4

 
213.2

Less allowances for depreciation, depletion and amortization
111.4

 
106.0

 
$
183.0

 
$
107.2


Total depreciation, depletion and amortization expense on property, plant and equipment was $15.2 million, $14.3 million and $14.8 million during 2012, 2011, and 2010, respectively. Depreciation expense for 2012 includes an impairment charge of $0.7 million for leasehold improvements and furniture and fixtures at KC. Depreciation expense for 2011 includes a charge of $1.3 million for a capital lease asset no longer being leased at HBB.
Proven and probable coal reserves, excluding the unconsolidated mines, approximated 1.2 billion tons (unaudited) at December 31, 2012 and 1.3 billion tons (unaudited) at December 31, 2011. These tons are reported on an as received by the customer basis and are the equivalent of “demonstrated reserves” under the coal resource classification system of the U.S. Geological Survey. Generally, these reserves would be commercially mineable at year-end prices and cost levels, using current technology and mining practices.