How big is Conemaugh?

Conemaugh has a reported capacity of 1,951 MW. Source: EIA Form 860.

What kind of plant is Conemaugh?

Conemaugh is a Conventional Steam Coal facility in Indiana County, PA, participating in the PJM market.

Where is Conemaugh located?

Conemaugh is in Indiana County, PA, inside the PJM balancing area.

Who operates Conemaugh?

Conemaugh is operated by KeyCon Operating LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Conemaugh generate?

Conemaugh reported 4,663.3 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

How does Conemaugh compare to other plants?

By capacity, Conemaugh ranks #18 of 206 operating plants of the same technology nationally. It ranks #1 of 14 in PA.

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Conventional Steam CoalPJM · Indiana County

Conemaugh

Indiana County · PJM

Conemaugh is a coal-fired power facility with 1,951 MW of EIA-reported nameplate capacity in Indiana County, Pennsylvania, registered as EIA Plant ID 3118. Its 1994-1995 flue-gas-desulfurization project reduced Unit 1 sulfur-dioxide emissions by approximately 95%; the project was described as one of the first U.S. plant modifications using scrubbers to meet the 1990 Clean Air Act Amendments.

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Overview

Key fields

Reported capacity: 1,951 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Conventional Steam Coal
Primary generation technology.
Registry anchor: Plant 3118
Indiana County · PJM
Operating status: Operating

Asset analyst

plant:plant-3118

Ask about Conemaugh

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
1	975.5 MW 850 MW summer	Conventional Steam Coal Bituminous Coal · ST	May 1970	Operating
2	975.5 MW 850 MW summer	Conventional Steam Coal Bituminous Coal · ST	May 1971	Operating
A	3 MW 2.8 MW summer	Petroleum Liquids Disillate Fuel Oil · IC	Feb 1970	Operating
B	3 MW 2.8 MW summer	Petroleum Liquids Disillate Fuel Oil · IC	Feb 1970	Standby/Backup: available for service but not normally used
C	3 MW 2.8 MW summer	Petroleum Liquids Disillate Fuel Oil · IC	Feb 1970	Standby/Backup: available for service but not normally used
D	3 MW 2.8 MW summer	Petroleum Liquids Disillate Fuel Oil · IC	Feb 1970	Standby/Backup: available for service but not normally used

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

Financing Restructuring

Sep 28, 2018

GenOn restructuring support arrangement addressed rejection of REMA's 16.45% Conemaugh leasehold interest and related lease and tax-indemnity claims. Arrangement contemplated $109 million of REMA cash for combined Keystone and Conemaugh claims, but evidence does not allocate amount to Conemaugh.

NRG REMA LLC · Conemaugh Lessor Genco LLC · Conemaugh Power Pass-Through Holders

GEN 2018 09.30 10Q

Transactions and agreements

Operations And Maintenance Agreement

Nov 1, 2002

Conemaugh Operation and Maintenance Agreement dated November 1, 2002 among station owners and Reliant-related entities. No O&M fee, duration, or capacity allocation disclosed.

Atlantic City Electric Company · Conemaugh Power Pass-Through Holders LLC · Constellation Power Source Generation, Inc. · Exelon Generation Company, LLC · PPL Montour LLC · Allegheny Energy Supply Conemaugh, LLC · PSEG Fossil LLC · Reliant Energy Mid-Atlantic Power Holdings, LLC · UGI Development Company

Source

Land and environmental record

Air Permit

Jan 25, 2024

Permit No. Title V Operating Permit 32-00059; revised RACT permit DEP Auth ID 1467324

Facility's Title V operating permit is 32-00059. Pennsylvania DEP's 2024 proposed revised permit identifies DEP Auth ID 1467324 and applies RACT II requirements with NOx RACT limits and monitoring, recordkeeping, and reporting requirements.

1467324[32-00059]_Pending.pdf

Cooling And Water

Jan 1, 2019

Cooling-water intake structure and cooling-tower system

NPDES permit regulates cooling-water intake structures and identifies cooling-tower blowdown as part of process effluent. Requires operation of existing intake technology and operational measures to minimize impingement mortality and entrainment.

Source

NPDES Permit

Jan 1, 2019

PA0005011 A-2

Pennsylvania DEP NPDES permit for Conemaugh Power Plant effective January 1, 2019; expires December 31, 2023.

Source

Receiving Water And Discharge Points

Jan 1, 2019

Conemaugh River and unnamed tributary to Conemaugh River

NPDES authorization covers discharges to Conemaugh River and unnamed tributary. Permitted outfalls: 001, 002, 003, 004, 006, 007, 015, 016, 017, 029. Effluent types include process wastewater, treated sewage, FGD blowdown, stormwater, coal-yard discharges.

Source

Site Area

2,500 acres reported; acreage unresolved

Olympus Power describes Conemaugh site as 2,500 acres along the Conemaugh River. Wikipedia reports 1,750 acres. Total property area remains unresolved without county parcel or deed record.

Conemaugh Generating Station

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

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AssetOwner / operatorOrganizationContractorRelated asset

Parties and identifiers

OrganizationRoleBasis

Keystone-Conemaugh Projects, LLCOwner / operatorOperator associated with Conemaugh.

ArcLight Capital PartnersOwner / developerArcLight Energy Partners Fund V purchased Exelon's interests in 2014; ArcLight-affiliated entities later acquired PSEG's interests in 2019.

Reporting portfolio

EIA reporting entity

KeyCon Operating LLC

Entity 63047

Operating portfolio

2 plants

1 states

Reported capacity

3,823 MW

Conventional Steam Coal

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
ConemaughCurrent	1,951 MW	PA
Keystone	1,872 MW	PA

Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.

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Overview

Key fields

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Overview

Key fields

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Infrastructure record

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Financing

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 Conemaugh

How big is Conemaugh?

What kind of plant is Conemaugh?

Where is Conemaugh located?

Who operates Conemaugh?

How much electricity does Conemaugh generate?

How does Conemaugh compare to other plants?

Co-located assets

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