Texas Coal Mine Site to Host 1.2GW Solar and Battery Storage Project

Construction has officially begun on the Big Rooter Power solar and battery storage project, a substantial 1.2-gigawatt (GW) clean energy initiative situated in Bremond, Texas, strategically located between the major metropolitan areas of Dallas and Houston. Panamint Capital, a Nevada-based investment firm with backing from the prominent private equity firm KKR, announced the groundbreaking ceremony last week. This ambitious undertaking is notable for its repurposing of land and utilization of assets from the adjacent Twin Oaks coal-fired power plant and the Calvert surface coal mine. Importantly, both the Twin Oaks plant and the Calvert mine are slated to continue their existing operations, indicating a phased transition rather than an immediate shutdown.

The Big Rooter Power project is poised to become one of the largest solar installations in the United States. Furthermore, Panamint Capital claims it will be the most extensive solar array ever constructed on a brownfield site in North America. A brownfield site refers to land that has been previously developed and may be contaminated or require remediation, making the development of new infrastructure more complex. Apolka Totth, the CEO of Panamint Capital, articulated the company's philosophy, stating that deploying new energy capacity at existing energy sites offers clear and multifaceted benefits to local communities, electricity consumers (ratepayers), and the environment. This approach aligns with a growing trend in the energy sector to leverage existing infrastructure and land for renewable energy development.

The project is expected to significantly bolster Texas's already robust and rapidly expanding solar sector. This growth is particularly timely, as the state's solar power generation is projected to surpass that of coal within Texas this year. The increasing reliance on renewable energy sources like solar is crucial for meeting the escalating energy demands of the state. These demands are driven by a confluence of factors, including the proliferation of data centers, the expansion of manufacturing facilities, and a notable increase in air conditioning usage, which is exacerbated by more frequent and severe hot weather events linked to climate change.

The Calvert mine itself is a significant operation, described as a 19-million-ton surface lignite mine that directly neighbors the Twin Oaks coal plant. Panamint Capital, which was established in 2019, has a stated mission to extend the operational life of existing fossil fuel infrastructure while simultaneously developing lower-emission facilities on these same sites. This dual strategy aims to balance energy supply needs with environmental considerations. In 2023, Panamint Capital acquired both the 310-megawatt (MW) Twin Oaks coal plant and the Calvert mine. The acquisition was made with the explicit objective of leveraging the site's existing characteristics – such as established grid connections and land availability – to rapidly and substantially increase generating capacity at the lowest possible cost, as further elaborated by Totth via email. The construction timeline is phased, with the initial phase of the solar farm, comprising 491 MW, already underway and scheduled to become operational in August 2028. The subsequent phase, encompassing the remaining 658 MW, is slated for construction to commence in December, indicating a comprehensive build-out plan.