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v3.23.1

Regulatory and Rate Matters (Tables) | 3 Months Ended
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Mar. 31, 2023
Regulated Operations [Abstract] |
Schedule of Rate Increases for Transmission Costs | The following sets forth TNMP’s recent interim transmission cost rate increases:
Effective Date |  | Approved Increase in Rate Base |  | Annual Increase in Revenue
|  | (In millions)
September 20, 2021 |  | $41.2 |  | $6.3
March 25, 2022 |  | $95.6 |  | $14.2
September 22, 2022 |  | $36.0 |  | $5.3
Schedule Of Interim Distribution Rate Increases | The following sets forth TNMP’s recent interim distribution rate increases:
Effective Date |  | Approved Increase in Rate Base |  | Annual Increase in Revenue
|  | (In millions)
September 1, 2021 |  | $104.5 |  | $13.5
September 1, 2022 |  | $95.7 |  | $6.8

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