How big is Brunner Island?

Brunner Island has a reported capacity of 1,616.1 MW. Source: EIA Form 860M.

What kind of plant is Brunner Island?

Brunner Island is a Natural Gas Steam Turbine facility in York County, PA, participating in the PJM market.

Where is Brunner Island located?

Brunner Island is in York County, PA, inside the PJM balancing area.

Who operates Brunner Island?

Brunner Island is operated by Brunner Island LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Brunner Island generate?

Brunner Island reported 3,916.9 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

How does Brunner Island compare to other plants?

By capacity, Brunner Island ranks #8 of 257 operating plants of the same technology nationally. It ranks #2 of 12 in PA.

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Brunner Island

Brunner Island LLC - York County - PJM

Brunner Island Steam Electric Station is a 1,616.1-MW three-unit dual-fuel steam-turbine power plant in York County, Pennsylvania, operating in the PJM-PPL market. Originally developed by PPL Corporation, the plant was transferred to Talen Energy on June 1, 2015, through a spinoff and combination with Riverstone-controlled assets. The facility operates on natural gas and bituminous coal; under a 2018 environmental settlement, coal burning will cease by the end of 2028, and all three units are planned for retirement in June 2035.

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Brunner Island

PJM · Asset profile

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Brunner Island — 1,616 MW gas plant, York County, PA · Ask the Grid

Overview

Nameplate capacity: 1616.1 MW
Canonical EIA plant baseline.
Registry anchor: Plant 3140
plant-3140

Structured profile

Technology: Natural Gas Steam Turbine
Operator: Brunner Island LLC

Related assets

Similar plants ranked by technology, capacity, and distance.

TalenEnergy Martins Creek

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TalenEnergy Montour

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Units and generators

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

Generator	Capacity	Technology	Operation	Status
1	363.3 MW 306 MW summer	Natural Gas Steam Turbine Natural Gas · ST	May 1961 Retirement: Jun 2035	Operating
2	405 MW 363 MW summer	Natural Gas Steam Turbine Natural Gas · ST	Sep 1965 Retirement: Jun 2035	Operating
3	847.8 MW 742 MW summer	Natural Gas Steam Turbine Natural Gas · ST	Jun 1969 Retirement: Jun 2035	Operating

Performance

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

Peer context

Technology capacity: 1,616.1 MW
National rank: #8
PA rank: #2

Monthly generation

Download CSV

Latest 12 months

3.92 TWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

29.6%

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

BRUNNER ISLAND

IN SERVICE · 230 kV

0.3 km

UNKNOWN124870

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

Equipment Installation

Apr 2010

New forced-draft cooling towers began operation; cost approximately $100 million and rank among the largest forced-draft cooling towers in the world; designed to reduce temperature of Susquehanna River water discharges for aquatic-life protection.

$100.0MPennsylvania Power and Light Corporation

powermag.com

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 / operatorContractorOrganizationEquipment

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

May 1961
May 1961
Generator enters operationEIA-860
EIA-860 lists generator 1 with this operating date.
Sep 1965
Sep 1965
Generator enters operation

Brunner Island

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Brunner Island

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Overview

Structured profile

Related assets

TalenEnergy Martins Creek

TalenEnergy Montour

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

York Energy Center

Chalk Point Power

Lackawanna Energy Center

Hummel Station LLC

Parties and identifiers

Reporting portfolio

Sources

Common questions about Brunner Island

How big is Brunner Island?

What kind of plant is Brunner Island?

Where is Brunner Island located?

Who operates Brunner Island?

How much electricity does Brunner Island generate?

How does Brunner Island compare to other plants?

Co-located assets