How big is Mammoth North Solar?

Mammoth North Solar has a reported capacity of 400 MW. Source: EIA Form 860.

What kind of plant is Mammoth North Solar?

Mammoth North Solar is a Solar Photovoltaic facility in Starke County, IN, participating in the PJM market.

Where is Mammoth North Solar located?

Mammoth North Solar is in Starke County, IN, inside the PJM balancing area.

Who operates Mammoth North Solar?

Mammoth North Solar is operated by Mammoth North, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Mammoth North Solar generate?

Mammoth North Solar reported 746.1 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.

Where does Mammoth North Solar connect to the grid?

Mammoth North Solar interconnects at Ora Ora Switch Station (Ora Ora substation), on the AEP Indiana Michigan Transmission Company, Inc. (IM Transco) system.

How does Mammoth North Solar compare to other plants?

By capacity, Mammoth North Solar ranks #19 of 7,234 operating plants of the same technology nationally. It ranks #2 of 125 in IN.

Mammoth North Solar — 400 MW solar farm, Starke County, IN

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Mammoth North Solar — 400 MW solar farm, Starke County, IN · Ask the Grid

Overview

Reported capacity: 400 MW
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
Technology: Solar Photovoltaic
Primary generation technology.
Registry anchor: Plant 65957
Mammoth North, LLC · Starke County · PJM
Operating status: Operating
Mammoth North Solar is operating.
Grid connection: Ora Ora Switch Station (Ora Ora substation)
345 kV · AEP Indiana Michigan Transmission Company, Inc. (IM Transco)

Profile

Grid role: Utility-scale solar generation facility
Grid connection: Ora Ora Switch Station (Ora Ora substation) · 345 kV · AEP Indiana Michigan Transmission Company, Inc. (IM Transco).
Context: Mammoth North Solar is the first phase of the Mammoth Solar development and Doral Renewables' first project to achieve commercial operations. Doral describes it as one of the largest U.S. solar projects and the largest solar facility in Indiana.
Physical build: Mammoth North is a 400 MW ground-mounted, single-axis solar PV facility in Starke County, Indiana. The documented physical scope includes ground-mounted PV modules, Sungrow SG3600 inverters, NEXTracker Horizon trackers, a 34.5-kV medium-voltage collection system, a 34.5/345-kV substation with three main power transformers, a 345-kV overhead transmission line, an operations and maintenance building, and a new three-breaker 345-kV switching station. The EPC portfolio identifies the facility as 480 MWdc and lists Trina Solar modules, Sungrow inverters, and Nextracker trackers; the financing-stage description instead identifies Risen Energy modules. No exact installed module or inverter count is disclosed in the cited exact-asset sources.

Structured profile

Reported capacity: 400 MW
Solar Photovoltaic
Operating status: operating
Mammoth North Solar is operating.
Interconnection: Ora Ora Switch Station (Ora Ora substation)
345 kV · AEP Indiana Michigan Transmission Company, Inc. (IM Transco)
Location: Starke County
PJM
Operator: Mammoth North, LLC

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Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
GEN1	400 MW 400 MW summer	Solar Photovoltaic Solar · PV	Nov 2024	Operating

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 400 MW; Solar Photovoltaic
National rank: #19; of 7,234 operating peers
IN rank: #2; of 125 operating peers

Monthly generation

Download CSV

Latest 12 months

746.1 GWh

Reported net generation

Latest report

Jun 2026

EIA-923 monthly filing

2025 capacity factor

21.4%

Using current reported nameplate capacity

Grid and market context

Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.

Nearby substations

HIFLD infrastructure inventory

UNKNOWN139968

IN SERVICE

2.8 km

UNKNOWN154094

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Financing

Financial Close

Jun 14, 2022

Financial close for Mammoth North construction financing totaling $392 million: $157 million construction-to-term loan facility, $170 million tax-equity bridge loan, and $65 million letter-of-credit facility. Deutsche Bank acted as sole bookrunner, sole structuring bank, and mandated lead arranger.

$392.0MDoral Renewables LLC · Deutsche Bank AG, New York Branch · Bayerische Landesbank, New York Branch · National Bank of Canada · Banco de Sabadell, S.A., Miami Branch · Comerica Bank · Intesa Sanpaolo S.p.A., New York Branch · Metropolitan Life Insurance Company · Marathon Capital Markets, LLC

Doral Secures Project Financing For The Mammoth North Solar Project

Tax Equity Commitment

Jun 14, 2022

Bank of America signed a nearly $175 million tax-equity commitment for Mammoth North, closed simultaneously with the $392 million construction financing on June 14, 2022. Amount is recorded as $175 million; source states 'nearly $175m.'

$175.0MDoral Renewables LLC · Bank of America, N.A.

Doral Secures Project Financing For The Mammoth North Solar Project

Land and environmental record

Emissions And Controls

2021

Operational emissions characterized as minimal. Project will not release CO2, sulfur, or other air pollutants during generation. GHG emissions primarily from construction, traffic, and maintenance fuel use.

IURC testimony and lender environmental due diligence characterize solar operations as producing minimal or no operational emissions. No Title V permit or emissions-control equipment identified.

Source

Environmental Compliance

2022

Project assigned Category B environmental classification (limited mitigation required). No violations or enforcement actions to date; reported as in compliance with environmental and social obligations.

Lender's Equator Principles environmental due diligence assigns Category B, requiring mitigation through permits and authorizations. Project reported as having no violations or enforcement actions and compliant with environmental and social obligations based on sponsor-provided information.

Source

Environmental Compliance Milestone

Oct 2024

Construction began March 2022; commercial operation October 2024. More than 2,000 grazing animals (sheep, pigs, donkeys, alpacas, livestock guardian dog) used for vegetation management.

Doral reports Mammoth North construction start March 2022, commercial operation October 2024. Project uses more than 2,000 sheep, kunekune pigs, donkeys, alpacas, and a dog as part of vegetation management system.

Mammoth North Solar |

Facility Land Area

Jun 9, 2021

Approximately 3,800 acres in Starke County and 300 acres in Pulaski County; total approximately 4,100 acres.

IURC filing states the facility occupies approximately 3,800 acres in Starke County and 300 acres in Pulaski County, totaling approximately 4,100 acres at that planning stage (June 2021).

Source

Habitat And Landscape Mitigation

2023

Landscape screening includes more than 4,000 trees and shrubs and 150 acres of pollinator-habitat seed mix; nearly 13 miles of landscape screening installed in 2023.

RES installed landscape screening in 2023 with more than 4,000 trees and shrubs (nearly half grown in-house), 150 acres of pollinator-habitat seed mix, and nearly 13 miles of screening designed for native habitat, visual screening, and long-term management.

Mammoth Solar North - Resource Environmental Solutions, LLC

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

Drag organizations to explore the network. Select a node to pin its details and available page link.

AssetOwner / operatorContractorOfftakerFinancier

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

2019
2019
Mammoth Solar project originMammoth Nor...
Doral's project page says Mammoth Solar began in 2019 as a grassroots effort involving local farmers; Mammoth North is the development's first phase.
May 2021
May 2021
Power-Purchase Agreement

Mammoth North Solar

Mammoth North Solar

Overview

Profile

Structured profile

Related assets

AEUG Union Solar, LLC

Honeysuckle Solar Farm

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Financing

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

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Parties and identifiers

Reporting portfolio

Sources

Common questions about Mammoth North Solar

How big is Mammoth North Solar?

What kind of plant is Mammoth North Solar?

Where is Mammoth North Solar located?

Who operates Mammoth North Solar?

How much electricity does Mammoth North Solar generate?

Where does Mammoth North Solar connect to the grid?

How does Mammoth North Solar compare to other plants?