How big is Ontelaunee Energy Center?

Ontelaunee Energy Center has a reported capacity of 728 MW. Source: EIA Form 860.

What kind of plant is Ontelaunee Energy Center?

Ontelaunee Energy Center is a Natural Gas Fired Combined Cycle facility in Berks County, PA, participating in the PJM market.

Where is Ontelaunee Energy Center located?

Ontelaunee Energy Center is in Berks County, PA, inside the PJM balancing area.

Who operates Ontelaunee Energy Center?

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

How much electricity does Ontelaunee Energy Center generate?

Ontelaunee Energy Center reported 3,736.7 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

How does Ontelaunee Energy Center compare to other plants?

By capacity, Ontelaunee Energy Center ranks #166 of 538 operating plants of the same technology nationally. It ranks #15 of 26 in PA.

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Natural Gas Fired Combined CyclePJM · Berks County

Ontelaunee Energy Center

Calpine Corporation · Berks County · PJM

Ontelaunee Energy Center is a natural gas-fired power facility with 728 MW of EIA-reported nameplate capacity in Berks County, Pennsylvania, registered as EIA Plant ID 55193. Ontelaunee Power Operating Company LLC is the public owner or developer; Ontelaunee Energy Center is the registered plant entity or operator. LSP Ontelaunee Holding, LLC acquired a 100% interest in the plant from A subsidiary of Calpine Corporation in 2005.

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plant:plant-55193

Ask about Ontelaunee Energy Center

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

Overview

Key fields

Reported capacity: 728 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combined Cycle
Primary generation technology.
Registry anchor: Plant 55193
Ontelaunee Energy Center · Berks County · PJM
Operating status: Operating
Ontelaunee Energy Center is operating.

Profile

Grid role: Middle-load combined-cycle gas plant

Structured profile

Reported capacity: 728 MW
Natural Gas Fired Combined Cycle
Operating status: operating
Ontelaunee Energy Center is operating.
Location: Berks County
PJM
Operator: Ontelaunee Energy Center
Asset role

Units and generators

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

Generator	Capacity	Technology	Operation	Status
CTG1	250 MW 186.3 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	May 2002	Operating
CTG2	250 MW 184.8 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	May 2002	Operating
STG	228 MW 174.8 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CA	May 2002	Operating

Performance

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

Peer context

Technology capacity: 728 MW
National rank: #166
PA rank: #15

Monthly generation

Download CSV

Latest 12 months

3.74 TWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

64.5%

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

UNKNOWN123860

IN SERVICE · 230 kV

0.1 km

UNKNOWN123861

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 Agreement

Aug 2005

Calpine agreed to sell the 550 MW Ontelaunee Energy Center to LS Power Equity Partners, LP for $225 million. Amount is sale consideration, not financing.

$225M550 MW contractedCalpine Corporation · LS Power Equity Partners, LP

Calpine to sell Ontelaunee Energy Center for $225 million

Land and environmental record

NPDES Receiving Water

Schuylkill River (WWF - warm water fishes)

NPDES Permit PA0088323 authorizes discharge from Ontelaunee Energy Center to Schuylkill River classified for warm-water fishes.

AUTHORIZATION TO DISCHARGE UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM DISCHARGE REQUIREMENTS FOR INDUSTRIAL WASTEWATER FACILITIES

Site Acreage

19.16

5115 Pottsville Pike property listed as 19.16-acre lot per commercial property record. Note: total site acreage may differ from individual parcel acreage.

5115 Pottsville Pike, Reading, PA 19605

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 / operator

Parties and identifiers

OrganizationRoleBasis

Ontelaunee Energy CenterOperatorLocal EIA-anchored Ask the Grid entity record.

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

May 2002
May 2002
Generators enter operationEIA-860
EIA-860 lists generator CTG1, generator CTG2, generator STG with this operating date.
Aug 2005
Aug 2005
Sale Agreement Announced

Ontelaunee Energy Center

Ask about Ontelaunee Energy Center

Ontelaunee Energy Center

Ask about Ontelaunee Energy Center

Overview

Key fields

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Parties and identifiers

Timeline and sources

Project timeline

Reporting portfolio

Sources

Common questions about Ontelaunee Energy Center

How big is Ontelaunee Energy Center?

What kind of plant is Ontelaunee Energy Center?

Where is Ontelaunee Energy Center located?

Who operates Ontelaunee Energy Center?

How much electricity does Ontelaunee Energy Center generate?

How does Ontelaunee Energy Center compare to other plants?

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