Regulatory and Rate Matters (Tables)

3 Months Ended

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