Texas Regulators Approve Coal Plant Retirement in Favor of Renewable Energy and Water Conservation

The Texas Public Utility Commission approved the closure of Southwestern Public Service Company's Tolk coal plant near Lubbock and authorized construction of renewable energy and battery storage facilities to replace its capacity. The transition will include 1,100 megawatts of wind, 189 megawatts of solar, and 322 megawatts of battery storage, sufficient to power approximately 375,000 homes while saving millions of gallons of water annually in the drought-prone Ogallala Aquifer region. The decision demonstrates that retiring expensive, water-intensive coal plants in favor of renewables is both cost-effective and environmentally beneficial, while maintaining system reliability.

The Tolk plant's retirement accelerates a transition that began in 2020 when SPS agreed to eventually shutter the facility. Located in Sudan, Texas, near the New Mexico border, the plant serves both states' power grids and required approval from regulators on both sides. The coal facility has dramatically reduced its water consumption in recent years—from 3.3 billion gallons annually in 2015 to 1.2 billion in 2024—yet still draws substantially from the Ogallala Aquifer, a critical groundwater source already facing depletion pressures across the region.

The replacement portfolio uses existing transmission infrastructure while introducing diverse generation sources suited to West Texas conditions. Texas regulators imposed cost controls on the natural gas plants approved alongside the renewables project, while New Mexico officials rejected the utility's proposal to classify gas facilities as zero-carbon resources under state energy policy.