Net completed plant consisted of the following:
Net Completed Plant
At September 30
(in millions)
 20252024
 CostAccumulated Depreciation 
Net
CostAccumulated DepreciationNet
Nuclear$27,091 $14,682 $12,409 $26,800 $14,149 $12,651 
Coal-fired(1)
19,029 15,760 3,269 20,177 16,635 3,542 
Gas, oil-fired, and other production7,746 2,274 5,472 7,051 2,112 4,939 
Transmission10,323 3,542 6,781 9,964 3,450 6,514 
Hydroelectric4,391 1,352 3,039 4,307 1,288 3,019 
Other electrical plant2,068 678 1,390 1,763 737 1,026 
Multipurpose dams900 419 481 900 413 487 
Other stewardship26 17 27 18 
Total$71,574 $38,716 $32,858 $70,989 $38,793 $32,196 
Note
(1) TVA recognized accelerated depreciation as a result of the decision to idle or retire certain units and the potential retirement of the remainder of the coal-fired fleet by 2035. See Note 8 — Plant Closures.

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.