Bechtel and Doral Renewables advance Mammoth Solar project in Indiana

A major milestone in the US solar sector is underway as Doral Renewables selects engineering giant Bechtel to complete the final phases of the Mammoth Solar project in Indiana. Set to deliver a total generating capacity of 1.3 gigawatts, the multi-phase development spans over 13,000 acres across Pulaski and Starke counties, marking it as one of the largest solar energy projects in the country. The partnership reflects growing momentum behind utility-scale solar in the Midwest and a deepening commitment to sustainable infrastructure.

Mammoth Solar outlines a vast vision for renewable development in Indiana

Launched by Doral Renewables, the Mammoth Solar project comprises three distinct phases: Mammoth North (400 megawatts), Mammoth South (300 megawatts), and Mammoth Central (600 megawatts split into two sub-phases). Mammoth North was the first to break ground and is already contributing power to the grid. With Bechtel’s newly announced role, the focus shifts to the remaining 900 megawatts needed to bring the entire facility online.

The geographic footprint alone signals the ambition of this project. Spread across two counties, the infrastructure will deliver significant contributions to state and regional energy needs, while addressing broader decarbonization targets. Indiana, historically reliant on coal and other fossil fuels, is becoming an emerging player in the transition to clean energy.

Bechtel’s EPC contract signals a pivot to accelerated buildout

Bechtel’s selection as the Engineering, Procurement, and Construction (EPC) contractor for Mammoth Central solidifies the project’s readiness to scale. Known for delivering high-profile infrastructure from energy to transportation, Bechtel brings deep solar experience and a tested supply chain to the development.

The contract covers all aspects of construction for the final two sub-phases totaling 600 megawatts, which will build on the momentum of the earlier phases. The company’s track record includes solar power projects across the US and abroad, ensuring Doral’s timeline remains on track as the project progresses toward completion.

Construction is expected to advance rapidly through 2025, with completion anticipated in 2026. When operational, the full facility will supply power to more than 175,000 homes and displace significant emissions annually.

Beyond energy production, the Mammoth Solar project promises lasting economic benefits for Indiana communities. According to local development estimates, the project will contribute approximately $40 million in economic value to Pulaski County over two decades. This includes temporary construction employment, permanent jobs related to operations and maintenance, and increased local tax revenues.

Community engagement has also been a central focus, with Doral maintaining open communication with landowners and local officials to ensure ongoing collaboration throughout the project lifecycle.

The broader significance of Mammoth Solar lies in its contribution to reshaping Indiana’s energy mix. Projects of this magnitude are not only technically complex but also politically meaningful. They signal an evolving acceptance of renewable infrastructure in historically coal-reliant areas.

At full capacity, the facility will offset millions of tons of carbon dioxide emissions over its operational life. This makes it a critical component of regional sustainability targets and a template for future development across the Midwest.

Sources:
renews.biz
Bechtel press release