Holy Cross Energy (HCE), a Colorado electric cooperative, announced it believes its on track to achieve over 90% clean energy by the end of 2025, as part of its “100×30” goal of providing its members with 100% clean energy by 2030.

This March, HCE provided 76% renewable energy — a new record for the cooperative.

The addition of Bronco Plains II Energy Center, Hunter Solar, and local clean energy projects High Mesa solar plus storage and Mamm Creek solar plus storage will bring the co-op to within 10% of its clean energy goals.

HCE says the projects represent power supply savings to HCE members of over $40 million dollars over the next ten years, compared to HCE’s current power supply portfolio.

“We’ve made a commitment to provide our members with increasingly clean energy,” said Sam Whelan, HCE’s VP of Finance. “We are humbled and grateful that we can transition to clean energy while still safely providing reliable and affordable electric service to our members and their communities.”


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Bronco Plains II Energy Center

Located in Kit Carson County on Colorado’s eastern plains, Bronco Plains II Energy Center is a 200 MW wind facility that began producing power from 72 wind turbines in late 2023.

During winter months, 150 MW of the facility’s output will go to HCE members, along with 100 MW in summer months. The remainder of the power produced will go to Guzman Energy. NextEra Energy Resources built, operates, and owns the project.

“Bronco Plains II Energy Center is a great example of what can be achieved in support of community-driven energy transition,” said Robin Lunt, Chief Commercial Officer of Guzman Energy. “Holy Cross Energy is proving that energy providers can come together to stabilize the cost of power through the deployment of cleaner power sources.”

Hunter Solar

HCE is buying 30 MW of the 75MW Hunter Solar project located in Arapahoe County, also on Colorado’s eastern plains. The project provides power for approximately 6,200 HCE member households annually. CORE Electric Cooperative purchases the balance of the power output, and the project is being developed by D. E. Shaw Renewable Investments.

“We are proud to work alongside HCE in meeting our collective cooperative goals,” said Chris Hildred, CORE’s Power Supply Director.

High Mesa and Mamm Creek Solar Plus Storage

The High Mesa solar plus storage project is located in western Garfield County, Colorado. Construction at the 90-acre project site, with a 100 MW solar array and a 20 MWh battery storage facility, is scheduled to be completed mid-2024.

The Mamm Creek solar plus storage project in Rifle, Colorado, is also a 10 MW solar array and 20 MWh battery storage facility and is currently in development. Completion is anticipated in early 2025.

The 20 MWh battery storage capacity at both locations will enable HCE to store and shift electricity produced by the solar panels during the day for use in the evening hours when the demand for electricity is the highest.

Both High Mesa and Mamm Creek are the result of an RFP issued by HCE in 2019. The AES Corporation is the developer and owner-operator of both sites.

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