| Property, Plant and Equipment |
(5) PROPERTY, PLANT, AND EQUIPMENT Property, plant, and equipment at December 31 consisted of the following:
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2025 |
2024 |
Lives |
Electric Utilities |
Property, Plant and Equipment |
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Weighted Average Useful Life |
Property, Plant and Equipment |
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Weighted Average Useful Life |
Minimum |
Maximum |
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(dollars in millions, life in years) |
(in years) |
Electric plant: |
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Production |
$ |
1,545.4 |
|
40 |
$ |
1,508.5 |
|
39 |
32 |
45 |
Electric transmission |
|
1,052.3 |
|
48 |
|
793.7 |
|
48 |
44 |
51 |
Electric distribution |
|
1,347.3 |
|
49 |
|
1,238.5 |
|
47 |
45 |
55 |
Integrated Generation |
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727.3 |
|
30 |
|
724.0 |
|
30 |
19 |
38 |
Plant acquisition adjustment (a) |
|
4.9 |
|
32 |
|
4.9 |
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32 |
32 |
32 |
General |
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310.2 |
|
25 |
|
306.6 |
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26 |
16 |
28 |
Total electric plant in service |
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4,987.4 |
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4,576.2 |
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Construction work-in-progress |
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270.1 |
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259.4 |
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Total electric plant |
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5,257.5 |
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4,835.6 |
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Less accumulated depreciation |
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(1,366.5 |
) |
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(1,280.3 |
) |
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Electric plant net of accumulated depreciation |
$ |
3,891.0 |
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$ |
3,555.3 |
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____________________ (a)The plant acquisition adjustment, which relates to the acquisition of our ownership interest in Wyodak Plant, is included in rate base and is being recovered with 5 years remaining.
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2025 |
2024 |
Lives |
Gas Utilities |
Property, Plant and Equipment |
|
Weighted Average Useful Life |
Property, Plant and Equipment |
|
Weighted Average Useful Life |
Minimum |
Maximum |
|
(dollars in millions, life in years) |
(in years) |
Gas plant: |
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Production |
$ |
26.3 |
|
44 |
$ |
21.6 |
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43 |
24 |
45 |
Gas transmission |
|
860.0 |
|
57 |
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817.5 |
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58 |
32 |
73 |
Gas distribution |
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3,414.3 |
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57 |
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3,107.3 |
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57 |
48 |
61 |
Cushion gas - not depreciable (a) |
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51.4 |
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N/A |
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52.1 |
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N/A |
N/A |
N/A |
Storage |
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83.6 |
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42 |
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78.8 |
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42 |
36 |
47 |
General |
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587.2 |
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22 |
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599.4 |
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22 |
20 |
25 |
Total gas plant in service |
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5,022.8 |
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4,676.7 |
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Construction work-in-progress |
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50.5 |
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43.5 |
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Total gas plant |
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5,073.3 |
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4,720.2 |
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Less accumulated depreciation |
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(744.4 |
) |
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(656.3 |
) |
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Gas plant net of accumulated depreciation |
$ |
4,328.9 |
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$ |
4,063.9 |
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____________________ (a)Depreciation of Cushion Gas is determined by the respective regulatory jurisdiction in which the Cushion Gas resides.
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2025 |
2024 |
Lives |
Corporate |
Property, Plant and Equipment |
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Weighted Average Useful Life |
Property, Plant and Equipment |
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Weighted Average Useful Life |
Minimum |
Maximum |
|
(dollars in millions, life in years) |
(in years) |
Total plant in service |
$ |
0.3 |
|
N/A |
$ |
0.4 |
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N/A |
N/A |
N/A |
Construction work-in-progress |
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13.8 |
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10.3 |
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Total gross property, plant and equipment |
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14.1 |
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10.7 |
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Less accumulated depreciation |
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0.2 |
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— |
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Total net of accumulated depreciation |
$ |
14.3 |
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$ |
10.7 |
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