There are four major parts to Xcel's Colorado filing, with the most significant likely being the retirement of Comanche Units 1 and 2 in Pueblo, each about a decade early and capable of producing a combined 660 MW.
Under a business-as-usual scenario, the utility would have filed to develop 450 MW of new resources while continuing operations of Comanche 1 and Comanche 2. The retirement, however, means Xcel will replace the power with renewables — 1,100 MW of wind energy and 700 MW of solar. The plan also calls for energy storage: 275 MW, all to be "embedded" with solar generation.
In addition, the utility is proposing to ensure reliability by utilizing 380 MW of "existing flexible gas resources."