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Regulatory and Rate Matters (Tables)

6 Months Ended

Jun. 30, 2017

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 10, 2015		$	7.0			$	1.4
March 23, 2016		25.8				4.3
September 8, 2016		9.5				1.8
March 14, 2017		30.2				4.8

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