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December 5, 2025

Colorado Public Utilities Commission (CO PUC)

Xcel Energy
Xcel Seeks Extension for Comanche Coal Plant from Colorado Regulators
Public Service Company of Colorado and the Polis administration want to keep Unit 2 of the coal-fired Comanche Generating Station running a year longer than planned.
JIRSA Hedrick
Split Colo. PUC Approves Xcel Energy’s Markets+ Application
The Colorado PUC issued a split decision approving Public Service Company of Colorado’s application to join SPP’s Markets+, finding that market participation is in the public interest and will “provide a number of benefits.”
PSCo
Xcel Battles Colo. Counties over Transmission Project
Xcel Energy is fighting two counties that are blocking a segment of the company’s Colorado’s Power Pathway transmission project. 
Shutterstock
Tri-State Plan Includes Renewables, Batteries and Gas
Colorado regulators have approved Tri-State Generation and Transmission Association’s plan to add 1,657 MW of new resources from 2026 to 2031, despite objections about the inclusion of a new natural gas plant.
SPP
Colo. PUC Approves PSCo’s Markets+ Participation
The Colorado PUC voted to approve Public Service Company of Colorado's plans to join SPP’s Markets+, with commissioners split on whether the move is a step toward or away from full RTO participation.
Colorado PUC
Colorado Commissioners Spar Over PSCo’s Markets+ Choice
Members of the Colorado PUC expressed differing opinions on whether PSCo joining Markets+ would be in the public interest.
SPP
Panel Approves SPP Markets+ Phase 2 Governance Transition

The panel of SPP board members overseeing the development of Markets+ has approved the governance transition plan for the construction phase of the day-ahead market. 

Aurora Energy Research
Study Finds PSCo Would Gain More in EDAM than Markets+
The study, conducted by Aurora Energy Research, found EDAM could provide the Denver-based utility $11.2 million more in average annual savings from 2028 to 2040 compared with Markets+, rising to $13.2 million through 2060.
© RTO Insider
After Hitting Milestones, Markets+ Participants Advance on Phase 2

Markets+ stakeholders will have little opportunity to ease up in coming months despite a wave of favorable developments for the market.

 
SPP
PSCo Seeks to Join SPP’s Markets+
Public Service Company of Colorado asked the Colorado Public Utilities Commission for permission to join SPP’s Markets+.

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