Property, plant and equipment at December 31 was as follows:
20252024Weighted
Average
Depreciable
Life in Years
(Dollars in thousands, where applicable)
Electric:
Generation$1,329,301 $1,014,906 49
Distribution585,328 546,121 45
Transmission701,287 662,466 65
CWIP
62,415 81,316 0
Other190,049 176,007 14
Natural gas distribution:
Distribution3,202,171 2,955,435 54
Transmission147,118 146,710 54
Storage44,427 43,700 37
General234,752 229,034 13
CWIP
82,858 74,207 0
Other292,428 282,007 15
Pipeline:
Transmission1,200,423 1,173,259 46
Storage64,230 61,369 53
CWIP
47,044 29,629 0
Other76,994 73,749 17
Other:
Land and other
4,147 4,148 NM
Less accumulated depreciation and amortization
2,304,787 2,209,771 
Net property, plant and equipment$5,960,185 $5,344,292 
NM - not meaningful

Historical Timeline

Fiscal YearFiled
2025Feb 20, 2026Showing above
2024Feb 20, 2025
2023Feb 22, 2024
2022Feb 24, 2023
2021Feb 23, 2022
2020Feb 19, 2021

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.