How big is St Joseph Energy Center?

St Joseph Energy Center has a reported capacity of 780 MW. Source: EIA Form 860.

What kind of plant is St Joseph Energy Center?

St Joseph Energy Center is a Natural Gas Fired Combined Cycle facility in St Joseph County, IN, participating in the PJM market.

Where is St Joseph Energy Center located?

St Joseph Energy Center is in St Joseph County, IN, inside the PJM balancing area.

Who operates St Joseph Energy Center?

St Joseph Energy Center is operated by St Joseph Energy Center LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does St Joseph Energy Center generate?

St Joseph Energy Center reported 5,830.9 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

How does St Joseph Energy Center compare to other plants?

By capacity, St Joseph Energy Center ranks #149 of 538 operating plants of the same technology nationally. It ranks #2 of 6 in IN.

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Natural Gas Fired Combined CyclePJM · St Joseph County

St Joseph Energy Center

Hoosier Energy · St Joseph County · PJM

St Joseph Energy Center is a natural gas-fired power facility with 780 MW of EIA-reported nameplate capacity in St Joseph County, Indiana, registered as EIA Plant ID 57794. St Joseph Energy Center LLC is the registered plant entity or operator. EIA operating records identify CT1, CT2, and ST1 under unit code CC01.

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Overview

Key fields

Reported capacity: 780 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combined Cycle
Primary generation technology.
Registry anchor: Plant 57794
St Joseph Energy Center LLC · St Joseph County · PJM
Operating status: Operating

Asset analyst

plant:plant-57794

Ask about St Joseph Energy Center

Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.

Units and generators

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

Generator	Capacity	Technology	Operation	Status
CT1	260 MW 245 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Apr 2018	Operating
CT2	260 MW 245 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Apr 2018	Operating
ST1	260 MW 225 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CA	Apr 2018	Operating

Commercial, land, and environmental record

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

Transactions and agreements

Acquisition Closing

Mar 2025

Wabash Valley Power Alliance and Hoosier Energy finalized joint purchase of St. Joseph Energy Center with each buyer acquiring 50% stake. Total purchase consideration not publicly disclosed. IURC proceeding also referenced separate St. Joseph Phase II entity which is excluded from this event.

Wabash Valley Power Alliance · Hoosier Energy · SJEC Project Holdings, LLC

Wabash Valley Power Alliance, Hoosier Energy finalize purchase of St. Joseph Energy Center - Hoosier Energy

Land and environmental record

Air Operating Permit

2024

Indiana Part 70 Title V Air Operating Permit T141-44823-00579

Official third-quarter 2024 deviation and compliance monitoring report identifies St. Joseph Energy Center, LLC at 54745 Walnut Road with no deviations occurring July–September 2024.

rt, ~/4L-

Cooling-Water Supply And Treatment

Groundwater is treated for use in the energy center cooling towers with 7.8 MGD treatment capacity, expandable to 15.6 MGD

Water treatment plant designed to remove iron and manganese with 7.8 MGD capacity, expandable to 15.6 MGD.

St. Joseph Energy Center Water Treatment Plant | DLZ

Emissions Controls

Dec 20, 2024

Water-treatment-plant diesel generators identified as using no pollution control

Permit describes New Well Field Generator and New Carlisle Potable Water Plant Generator as diesel-fueled emergency generators with no control. This finding is limited to water-treatment plant generators, not the main combined-cycle turbines.

Source

NPDES Wastewater Permit

Apr 1, 2025

Indiana NPDES Permit IN0064122

Current five-year permit for St. Joseph Energy Center, LLC at 54745 Walnut Road effective April 1, 2025 and expires March 31, 2030. June/July 2026 modification proceeding identified as draft modification.

Source

Site Area

Mar 13, 2025

Approximately 165 acres

Operating plant campus is 165-acre site. This is total campus acreage and does not resolve individual parcel ownership or legal descriptions.

Wabash Valley Power Alliance, Hoosier Energy finalize purchase of St. Joseph Energy Center - Hoosier Energy

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Units and generators

Performance

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Monthly generation

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Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

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Timeline and sources

Project timeline

Sources

Common questions about St Joseph Energy Center

How big is St Joseph Energy Center?

What kind of plant is St Joseph Energy Center?

Where is St Joseph Energy Center located?

Who operates St Joseph Energy Center?

How much electricity does St Joseph Energy Center generate?

How does St Joseph Energy Center compare to other plants?

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