XML 34 R18.htm IDEA: XBRL DOCUMENT v3.24.0.1
Jointly Owned Facilities
 12 Months Ended
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Jointly Owned Facilities

(6) JOINTLY OWNED FACILITIES

 

Our consolidated financial statements include our share of several jointly-owned facilities as described below. Our share of the facilities’ expenses is reflected in the appropriate categories of operating expenses in the Consolidated Statements of Income. Each owner of the facility is responsible for financing its investment in the jointly-owned facilities.

 

At December 31, 2023, our interests in jointly-owned generating facilities and transmission systems were (in millions):

 

Ownership Interest

 

Plant in Service

 

Construction Work in Progress

 

Less Accumulated Depreciation

 

Plant Net of Accumulated Depreciation

 

Wyodak Plant (a)

 

20

%

$

122.3

 

$

—

 

$

(73.4

)

$

48.9

 

Transmission Tie

 

35

%

$

24.5

 

$

0.3

 

$

(7.8

)

$

17.0

 

Wygen III (b)

 

52

%

$

145.3

 

$

0.3

 

$

(32.2

)

$

113.4

 

Wygen I (c)

 

76.5

%

$

116.0

 

$

0.8

 

$

(60.1

)

$

56.7

 

 

(a)
In addition to supplying South Dakota Electric with coal for its share of the Wyodak Plant, our mine supplies PacifiCorp’s share of the coal under a separate long-term agreement through December 31, 2026, with an annual renewal option for one-year extensions. This coal supply agreement is collateralized by a mortgage on and a security interest in some of WRDC’s coal reserves.
(b)
South Dakota Electric retains responsibility for plant operations. WRDC supplies fuel to Wygen III for the life of the plant.
(c)
Black Hills Wyoming retains responsibility for plant operations. WRDC supplies fuel to Wygen I for the life of the plant.