3 unchanged sentences
Generating Properties
−Removed: At September 30, 2024, TVA-operated generating assets consisted of seven nuclear units, 24 active coal-fired units, 70 simple-cycle gas units (68 active units and two idled units), one cogeneration unit, 14 combined-cycle gas power blocks, 109 conventional hydroelectric units (106 active units and three units in long-term outage and unavailable for service), four pumped-storage hydroelectric units, five diesel generator units, and nine operating solar installations.
−Removed: As of September 30, 2024, four of the combined-cycle power blocks were leased to special purpose entities ("SPEs") and leased back to TVA under long-term leases.
+Added: At September 30, 2025, TVA-operated generating assets consisted of seven nuclear units, 24 active coal-fired units, 68 simple-cycle gas units, one cogeneration unit, 10 aeroderivative units, 14 combined-cycle gas power blocks, 109 conventional hydroelectric units (106 active units and three units in long-term outage and unavailable for service), four pumped-storage hydroelectric units, five diesel generator units, and nine operating solar installations.
+Added: As of September 30, 2025, four of the combined-cycle power blocks and 10 aeroderivative units were leased to special purpose entities ("SPEs") and leased back to TVA under long-term leases.
See Note 12 — Variable Interest Entities and Note 15 — Debt and Other Obligations — Lease/Leasebacks .
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It does not include real-time bulk electrical system operating constraints such as transmission line loading limitations, fuel availability such as coal, gas, and seasonal river reservoir levels, fuel blend, severe weather events, environmental and/or other regulatory constraints, transmission system outages, generator outages, or generator derates.
−Removed: Summer net capability as presented in the table below reflects the expected output of individual resources at TVA’s anticipated summer demand peak.
+Added: Summer net capability as presented in the table below reflects the expected output of individual resources at
+Added: TVA’s anticipated summer demand peak.
The summation of those individual resources does not include the real-time bulk electrical system operating constraints previously noted.
1 unchanged sentence
In addition to the TVA-operated generating facilities presented in the table below, TVA also has 8,482 MWs of operating capacity available through PPAs.
−Removed: At September 30, 2024, these contracts were comprised of 3,206 MWs of renewable PPAs and 5,098 MWs of nonrenewable PPAs.
The summation of TVA's PPAs under contract does not include real-time operating constraints, such as intermittency of renewable resources associated with weather or other factors.
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Simple-Cycle Combustion Turbine
−Removed: Tennessee 4 92 1971 1972
+Added: Allen Tennessee 2 92 1971 1972
Brownsville Tennessee 4 425 1999 1999
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Gleason Tennessee 3 463 2000 2000
−Removed: Johnsonville Tennessee 13 708 1975 2000
+Added: Johnsonville (2)
+Added: Tennessee 13 208 1975 2000
Kemper Mississippi 4 273 2002 2002
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Johnsonville Tennessee 1 66 1975 2000
+Added: Aeroderivative Combustion Turbine
+Added: Johnsonville Tennessee 10 530 2025 2025
Total Natural Gas and/or Oil-Fired 93 12,643
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TVA Non-hydro Renewable Resources (12)
−Removed: TVA Other Nonrenewable Resources (12)
Total TVA-Operated Generating Facilities Summer Net Capability 32,268
(1) See Generating Properties above for a discussion of TVA-operated natural gas and/or oil-fired facilities subject to leaseback and long-term lease arrangements.
−Removed: (2) As of September 30, 2024, 92 MW of peak firing short-term capability of simple-cycle combustion turbine units was not operational and would require additional
−Removed: investment for dependable use;
−Removed: therefore, this short-term capability is not presented in the table above.
−Removed: (3) As of September 30, 2024, TVA had two idled units at Allen CT Facility (Units 17 and 18) and three units that were in long-term outage and unavailable for service at Wilbur Hydroelectric Facility (Units 1-3).
+Added: (2) As of September 30, 2025, TVA had 10 idled units at Johnsonville Combustion Turbine Facility (Units 1-10).
These units are included in their respective locations in the table above;
−Removed: however, the capability from these units is excluded.
+Added: however, the capacity from these units is excluded.
(3) Ackerman Combined Cycle Facility is a single steam cycle unit driven by two gas turbines (2x1 configuration).
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(8) Paradise Combined Cycle Facility is a single steam cycle unit driven by three gas turbines (3x1 configuration).
+Added: (9) As of September 30, 2025, TVA had three units that were in long-term outage and unavailable for service at Wilbur Hydroelectric Facility (Units 1-3).
+Added: These units are included in their respective locations in the table above;
+Added: however, the capability from these units is excluded.
(10) Includes 86 MW of summer net capability associated with Hiwassee Hydro Unit 2.
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(11) See Item 1, Business — Power Supply and Load Management Resources — Hydroelectric Pumped-Storage for a discussion of Raccoon Mountain Pumped-Storage Plant.
−Removed: (12) TVA owns approximately one MW of renewable solar capability among nine operating solar installations, and Allen Combined Cycle Facility has five MW of nonrenewable biomass capability.
+Added: (12) TVA owns approximately one MW of renewable solar capability among nine operating solar installations.
Transmission Properties
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and 1,361 customer connection points (customer, generation, and interconnection).
−Removed: Natural Resource Stewardship Properties
+Added: Public Land Management Reservoir Properties
TVA operates and maintains 49 dams and manages approximately 11,000 miles of reservoir shoreline, 293,000 acres of reservoir land, 650,000 surface acres of reservoir water, and approximately 150 public recreation areas throughout the Tennessee Valley, including campgrounds, day-use areas, and boat launching ramps.
−Removed: Additionally, TVA manages over 153 agreements for commercial recreation (such as campgrounds and marinas).
+Added: Additionally, TVA manages 154 agreements for commercial recreation (such as campgrounds and marinas).
As part of its stewardship responsibilities, TVA approval is required to be obtained before any obstruction affecting navigation, flood control, or public lands can be constructed across, along, or in the Tennessee River and its tributaries.
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Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.