How big is St Joseph Energy Center?

St Joseph Energy Center reports 780 MW natural gas of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.

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 5,599.2 GWh over the twelve months to 2026-07. 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 #150 of 540 operating plants of the same technology nationally. It ranks #2 of 7 in IN.

St Joseph Energy Center — 780 MW gas plant, IN

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St Joseph Energy Center — 780 MW gas plant, IN · Ask the Grid

Generation and physical site

EIA plant 57794 · Inventory for Sep 2026.

Reported operating nameplate by technology

Natural gas: 780 MW

Operating generators only. Battery power is in MW; stored energy is in MWh. These ratings do not establish a shared export limit.

Generator records (7)

EIA generator status and nameplate capacity for St Joseph Energy Center
Generator	Technology	Status	Power (MW)	Energy (MWh)
CT1	Natural Gas Fired Combined Cycle	Operating	260	Unknown
CT2	Natural Gas Fired Combined Cycle	Operating	260	Unknown
ST1	Natural Gas Fired Combined Cycle	Operating	260	Unknown
1	Natural Gas Fired Combined Cycle	canceled_or_postponed	670	Unknown
CT3	Natural Gas Fired Combined Cycle	canceled_or_postponed	238	Unknown
CT4	Natural Gas Fired Combined Cycle	canceled_or_postponed	238	Unknown
ST2	Natural Gas Fired Combined Cycle	canceled_or_postponed	260	Unknown

Physical map location · OpenStreetMap: 41.69922, -86.48045
Filed location · EIA: 41.69899, -86.47970

Sources and observation dates

Inventory source: EIA-860M workbook (preliminary)
EIA reporting month: Sep 2026
EIA retrieved: Oct 24, 2026
OSM extract: Oct 9, 2026
OSM last mapped edit: Sep 4, 2022
Map prepared: Oct 24, 2026
Field verification: Not reported

Reporting month describes the inventory. Retrieval and map preparation describe processing; an OSM edit does not establish an in-service date.

EIA source inventory

Units and generators

Current 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 CT	Apr 2018	Operating
CT2	260 MW 245 MW summer	Natural Gas Fired Combined Cycle CT	Apr 2018	Operating
ST1	260 MW 225 MW summer	Natural Gas Fired Combined Cycle 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.

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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

Mapped facility footprint

Overview

Overview

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Infrastructure record

Profile

Structured profile

Generation and physical site

Reported operating nameplate by technology

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Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Market registration

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Reporting portfolio

Timeline and sources

Project timeline

Sources

Common questions about St Joseph Energy Center