How big is TalenEnergy Martins Creek?

TalenEnergy Martins Creek has a reported capacity of 1,701 MW. Source: EIA Form 860.

What kind of plant is TalenEnergy Martins Creek?

TalenEnergy Martins Creek is a Natural Gas Steam Turbine facility in Northampton County, PA, participating in the PJM market.

Where is TalenEnergy Martins Creek located?

TalenEnergy Martins Creek is in Northampton County, PA, inside the PJM balancing area.

Who operates TalenEnergy Martins Creek?

TalenEnergy Martins Creek is operated by TalenEnergy Martins Creek LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does TalenEnergy Martins Creek generate?

TalenEnergy Martins Creek reported 2,737.1 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

Where does TalenEnergy Martins Creek connect to the grid?

TalenEnergy Martins Creek interconnects at Martins Creek 230 kV switchyard, on the PPL Electric Utilities Corp system.

How does TalenEnergy Martins Creek compare to other plants?

By capacity, TalenEnergy Martins Creek ranks #6 of 257 operating plants of the same technology nationally. It ranks #1 of 12 in PA.

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Natural Gas Steam TurbinePJM · Northampton County

TalenEnergy Martins Creek

TalenEnergy Martins Creek LLC · Northampton County · PJM

TalenEnergy Martins Creek is a natural gas-fired power facility with 1,701 MW of EIA-reported operating capacity in Northampton County, Pennsylvania, registered as EIA Plant ID 3148. TalenEnergy Martins Creek LLC owns and operates the plant. In 1977, the addition of Martins Creek Unit 4 made the plant the largest generating station in the Pennsylvania Power & Light system.

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plant:plant-3148

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

Overview

Key fields

Reported capacity: 1,701 MW
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
Technology: Natural Gas Steam Turbine
Primary generation technology.
Registry anchor: Plant 3148
TalenEnergy Martins Creek LLC · Northampton County · PJM
Operating status: Operating
TalenEnergy Martins Creek is currently operating; a closure or retirement is listed for June 2035.
Grid connection: Martins Creek 230 kV switchyard
230 kV · PPL Electric Utilities Corp
Commercial operation: March 1977
Best-supported operating milestone.
Project financing: $290M
On August 9, 2023, Talen refinanced the non-recourse Lower Mount Bethel–Martins Creek subsidiary debt by upsizing its 2030 Term Loan B by $290 million.

Profile

Operating status: TalenEnergy Martins Creek is currently operating; a closure or retirement is listed for June 2035.
Grid role: Peaker
Grid connection: Martins Creek 230 kV switchyard · 230 kV · PPL Electric Utilities Corp.
Context: In 1977, the addition of Martins Creek Unit 4 made the plant the largest generating station in the Pennsylvania Power & Light system.
Physical build: Two 850-MW-class steam turbine-generating units (Units 3 and 4), comprising two steam turbines and two generators. Each unit is rated at approximately 850 MW gross, with generator nameplate capacity of 850.5 MW. A documented 2020 turbine-building restoration replaced a 100-ton overhead bridge crane, rooftop mechanical equipment, 50,000 square feet of roofing membrane and metal decking, 120 tons of structural steel, and 24,000 square feet of wall panels.

Structured profile

Reported capacity: 1,701 MW
Natural Gas Steam Turbine
Commercial operation: March 1977
Operating status: operating
TalenEnergy Martins Creek is currently operating; a closure or retirement is listed for June 2035.
Retirement: June 2035
TalenEnergy Martins Creek is currently operating; a closure or retirement is listed for June 2035.
Interconnection

Units and generators

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

Generator	Capacity	Technology	Operation	Status
3	850.5 MW 850 MW summer	Natural Gas Steam Turbine Natural Gas · ST	Oct 1975 Retirement: Jun 2035	Operating
4	850.5 MW 850 MW summer	Natural Gas Steam Turbine Natural Gas · ST	Mar 1977 Retirement: Jun 2035	Operating
CTG1	23.6 MW 18 MW summer	Natural Gas Fired Combustion Turbine Natural Gas · GT	Jun 1971 Retirement: Jun 2023	Operating

Performance

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

Peer context

Technology capacity: 1,701 MW
National rank: #6
PA rank: #1

Monthly generation

Download CSV

Latest 12 months

2.74 TWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

15.1%

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

MARTINS CREEK

IN SERVICE · 230 kV

0.4 km

UNKNOWN123651

Commercial, land, and environmental record

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

Land and environmental record

Air Permit

Nov 20, 2024

Permit No. Pennsylvania Title V/State Operating Permit 48-00011, DEP Authorization ID 1506927, covers MC Project Co LLC/Martins Creek

Issued Pennsylvania DEP permit dated November 20, 2024, expiration date January 11, 2028. Plant address and Lower Mount Bethel Township location match exact Martins Creek facility.

1506927[48-00011]_Issued_v2.pdf

Ash Waste And Basin Management

Waste system includes Ash Basin No. 1, Industrial Waste Treatment Basin, former Fly Ash Basin, Low Volume Waste Basin, Ash Basin No. 3, and Ash Basin No. 4; groundwater monitored quarterly or during closure periods

EPA Statement of Basis describes bottom-ash and fly-ash disposal, cooling-tower blowdown, demineralizer waste, plant and coal-yard sump flows, basin liners, and groundwater monitoring. Former Fly Ash Basin closed 1979 with material in place; Ash Basin No. 3 retired 1989; Low Volume Waste Basin closed after 1994 fuel-oil-spill containment use.

Source

Site Area

Facility site is approximately 700 acres

EPA Statement of Basis describes Martins Creek as a 700-acre steam-powered generating site. This is historical site-area statement; not a current parcel-level acreage total.

Source

Waste Impoundment Area

1989

Ash Basin No. 4 is approximately 40 acres

Pennsylvania DEP consent-order record identifies Ash Basin No. 4 as approximately 40-acre impoundment constructed around 1989 and associated with Martins Creek Steam Electric Station.

MARTINS CREEK, LLC, and : Natural Resourc

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 / operatorProject company

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Jun 1971
Jun 1971
Generators enter operationEIA-860
EIA-860 lists generator CTG1, generator CTG2, generator CTG3, generator CTG4 with this operating date.
Oct 1975
Oct 1975
Generator enters operation

TalenEnergy Martins Creek

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TalenEnergy Martins Creek

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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

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Parties and identifiers

Reporting portfolio

Sources

Common questions about TalenEnergy Martins Creek

How big is TalenEnergy Martins Creek?

What kind of plant is TalenEnergy Martins Creek?

Where is TalenEnergy Martins Creek located?

Who operates TalenEnergy Martins Creek?

How much electricity does TalenEnergy Martins Creek generate?

Where does TalenEnergy Martins Creek connect to the grid?

How does TalenEnergy Martins Creek compare to other plants?

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