CPS Energy Spruce units.

The new $50 million retention pond will collect coal waste from the J.K. Spruce Power Plant. Credit: Bonnie Arbittier / San Antonio Report

CPS Energy Calaveras Power Station hosts the Deely and Spruce coal power plants. On the night of Dec. 31, 2018, CPS Energy’s Deely power plant will be closing its plant to commercial operations.