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Jointly owned facilities
12 Months Ended
Dec. 31, 2014
Regulated Operations [Abstract]  
Jointly owned facilities
Jointly Owned Facilities
The consolidated financial statements include the Company's ownership interests in the assets, liabilities and expenses of the Big Stone Station, Coyote Station and Wygen III. Each owner of the stations is responsible for financing its investment in the jointly owned facilities.
The Company's share of the stations operating expenses was reflected in the appropriate categories of operating expenses (fuel, operation and maintenance and taxes, other than income) in the Consolidated Statements of Income.
At December 31, the Company's share of the cost of utility plant in service and related accumulated depreciation for the stations was as follows:
 
2014

2013

 
(In thousands)
Big Stone Station:
 
 
Utility plant in service
$
64,283

$
63,890

Less accumulated depreciation
43,043

41,323

 
$
21,240

$
22,567

Coyote Station:
 

 

Utility plant in service
$
138,810

$
138,261

Less accumulated depreciation
94,443

89,528

 
$
44,367

$
48,733

Wygen III:
 

 

Utility plant in service
$
65,597

$
64,332

Less accumulated depreciation
5,928

4,639

 
$
59,669

$
59,693