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Regulatory and Rate Matters - Application for Certificate of Convenience and Necessity (Details) - MW	Apr. 26, 2016	Jun. 30, 2015
San Juan Generating Station Units 2 and 3 | Clean Air Act, SNCR | Public Service Company of New Mexico
Public Utilities, General Disclosures [Line Items]
Newly-identified replacement gas plant (in mw)	80	187

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Public Utilities, Newly Identified Replacement Gas-fired Generation, in Megawatts

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