Construction Review Online reported on October 5, 2026, that Doral Renewables secured construction permits for two Mammoth Solar projects in Indiana totaling 1,100 MW, with completion of the broader project expected in 2029. The permits themselves and a matching Doral announcement are not available in the cited material, so the permit claim should be treated as that publication’s reporting, not independently confirmed fact.
What does the 2026 report say about Mammoth Solar Phase 2?
Construction Review Online says the permits cover two projects with a combined capacity of 1,100 MW and that the broader Mammoth Solar project could reach approximately 2,700 MW, with completion targeted for 2029. Those figures come from its October 5, 2026 report; the underlying permit filings are not cited here.
The report also puts the broader site at roughly 20,000 acres. Its additional estimates of NIS 350 million in revenue and NIS 300 million in annual EBITDA are likewise claims by Construction Review Online, not independently corroborated project figures.
What is the capacity of Mammoth Solar Phase 2?
There is no single capacity figure that can be reconciled across the available announcements. The 2026 report calls the two newly permitted projects 1,100 MW, while earlier Doral and Bechtel descriptions identify three projects totaling 900 MW, using both MW and MWac. The publications do not explain whether the newer report uses a different project boundary, rating basis, or phase definition, so those figures should not be treated as interchangeable.
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| Source and date | Reported scope and capacity | Status or qualification |
|---|---|---|
| Construction Review Online, October 2026 | Two projects totaling 1,100 MW; broader project approximately 2,700 MW | Secondary report; permits and capacity figures not independently verified here. |
| Doral Renewables, September 2024 | Three remaining projects of 300 MW each, 900 MW total; Mammoth North at 400 MW | Doral said Mammoth North construction was completed in July 2024. |
| Doral Renewables, May 2025 | Mammoth South, Central I, and Central II at 300 MWac each; broader facility 1.3 GW | Doral project and financing announcement. |
| Bechtel, May 2025 | Three-project construction scope of 900 MWac; broader facility up to 1.3 GWac | Bechtel described its scope after receiving full notice to proceed. |
MW and MWac are retained as each source published them. The cited announcements do not supply enough information to convert or reconcile the 2026 report’s 1,100 MW figure with the earlier 900 MW or 1.3 GW descriptions.
How did the project’s reported scope develop?
- November 3, 2022: The Indiana Economic Development Corporation described Mammoth South as the second phase of a three-phase, 13,000-acre project in northwest Indiana. It said South covered 3,500 acres in Pulaski County.
- September 3, 2024: Doral said Mammoth North, a 400 MW project in Starke County, had completed construction in July 2024. It described the remaining work as three 300 MW projects, 900 MW combined, in Pulaski County, and announced financing and EPC agreements with Bechtel.
- May 16–19, 2025: Bechtel reported that Doral had issued full notice to proceed for Mammoth South, Central I, and Central II, describing the construction scope as 900 MWac. Doral called the three phases 300 MWac apiece and described the overall facility as 1.3 GW.
- October 5, 2026: Construction Review Online reported the two-project, 1,100 MW permit action and a 2029 completion target. This description does not establish how the reported projects relate to the earlier three-phase scope.
Where is Mammoth Solar located?
Mammoth Solar is in northwest Indiana, across Starke and Pulaski counties, according to the Indiana Economic Development Corporation. The agency placed Mammoth South in Pulaski County; Doral’s project page also locates Mammoth Central there. Doral’s 2024 announcement placed Mammoth North in Starke County.
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Reported acreage varies by source and date: Indiana’s 2022 announcement described a 13,000-acre three-phase project, while Construction Review Online’s 2026 article reported approximately 20,000 acres for the broader site. The available descriptions do not establish whether the difference reflects an expanded boundary or a different project scope.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Who is building the project, and how is the land intended to be used?
Doral Renewables is the developer. Doral said it entered EPC agreements with Bechtel for the remaining phases in 2024; Bechtel later described its engineering and construction scope and said it had received full notice to proceed. The 2026 permit report attributes the new permits to Doral, but the cited information does not independently verify the approvals or whether the project scope has changed since the 2025 announcements.
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Doral describes an agrivoltaic approach that combines solar generation with agricultural uses such as livestock grazing, crop production, and pollinator habitat. These are planned or company-described land uses; the cited material does not establish measured agricultural results.
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Sources
- Construction Review Online: Doral secures construction permits for 1.1 GW Mammoth Solar expansion in Indiana (October 5, 2026).
- Doral Renewables: $285 million financing announcement (September 3, 2024).
- Doral Renewables: Mammoth Solar project announcement (May 19, 2025).
- Bechtel: Mammoth Solar construction announcement (May 16, 2025).
- Indiana Economic Development Corporation: Mammoth South announcement (November 3, 2022).
- Doral Renewables: Mammoth Solar project page.
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