Invenergy Secures Tallgrass Gas Transport for Planned Yuma and Maricopa Plants

Invenergy announced on Feb. 20, 2026 that it has signed a precedent agreement with a subsidiary of Tallgrass to secure long‑term natural gas transportation capacity to support planned natural gas-fired power plants to be developed in Maricopa County and Yuma County, Arizona. Coverage of the agreement states the deal would underpin development of as many as three new plants, though Invenergy has not disclosed site names or exact counts.

Daniel Runyan, Invenergy’s senior vice president for Development, framed the deal as part of the company’s decade-long Arizona presence and broader strategy. He said, “For 25 years—including 10 in Arizona—Invenergy has partnered with communities to deliver a mix of energy solutions and shared value for the local economy.” He added, “As electricity demand grows, it’s even more clear that natural gas is critical to keeping energy affordable and reliable, and our agreement with Tallgrass to procure long-term gas supply is proof of our commitment to Arizona, our customers, and the local communities we support.”

Invenergy spokesperson Jefferson Caves told reporters the company is evaluating potential sites in both Maricopa and Yuma counties and is speaking with landowners, but has not identified specific parcels for the proposed plants. The company already has a large solar project under construction in Arizona and “several energy storage facilities,” signaling the firm’s mixed-technology footprint in the state even as it pursues new gas-fired capacity.

Tallgrass, described as a Colorado-based multi-commodity infrastructure group operating more than 10,000 miles of pipelines, would supply the gas infrastructure for Invenergy’s planned projects. Reporting notes that the pipeline infrastructure intended to serve the Arizona plants has not yet been constructed, and Tallgrass also recently moved forward on a separate data center complex in Wyoming expected to include 2.7 GW of gas-fired generation capacity that received local approval earlier this year.

Scale and timing remain fluid. Some coverage references development of up to three plants; Invenergy’s national experience includes natural gas facilities ranging from 314 megawatts to 1,483 megawatts. The company and market observers point to rising needs in Arizona, where Arizona Public Service projects electricity demand could grow about 40% over the next 15 years, a statistic that proponents say strengthens the case for new dispatchable generation.

Key unanswered items include the Tallgrass subsidiary’s name, the precedent agreement’s transportation volumes and term, exact plant capacities and locations, permit and construction timelines, and whether Invenergy has secured offtake or power purchase agreements to justify building the plants. Until those filings appear with Maricopa and Yuma county planning offices, state permitting agencies, or in commercial contracts, the agreement signals intent and supply planning but does not set a definitive construction schedule.