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Jointly Owned Facilities
12 Months Ended
Dec. 31, 2023
Regulated Operations [Abstract]  
Jointly Owned Facilities Jointly Owned Facilities
The consolidated financial statements include the Company's ownership interests in three coal-fired electric generating facilities (Big Stone Station, Coyote Station and Wygen III) and two major transmission lines (BSSE and JETx). Each owner of the jointly owned facilities is responsible for financing its investment. The Company's share of the jointly owned facilities operating expenses was reflected in the appropriate categories of operating expenses (electric fuel and purchased power; 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, construction work in progress and related accumulated depreciation for the jointly owned facilities was as follows:
Ownership Percentage20232022
 (In thousands)
Big Stone Station:22.7 %
Utility plant in service$159,437 $157,699 
Construction work in progress197 231 
Less accumulated depreciation52,264 48,590 
$107,370 $109,340 
BSSE:50.0 %
Utility plant in service$107,260 $107,260 
Construction work in progress — 
Less accumulated depreciation8,111 6,182 
$99,149 $101,078 
Coyote Station:25.0 %
Utility plant in service$160,208 $158,274 
Construction work in progress159 1,807 
Less accumulated depreciation113,187 111,203 
$47,180 $48,878 
JETx:
50.0 %
Utility plant in service$ $— 
Construction work in progress1,372 — 
Less accumulated depreciation — 
$1,372 $— 
Wygen III:25.0 %
Utility plant in service$66,852 $66,238 
Construction work in progress127 273 
Less accumulated depreciation13,728 12,477 
$53,251 $54,034