How big is Lower Mount Bethel Energy?

Lower Mount Bethel Energy has a reported capacity of 651.6 MW. Source: EIA Form 860.

What kind of plant is Lower Mount Bethel Energy?

Lower Mount Bethel Energy is a Natural Gas Fired Combined Cycle facility in Northampton County, PA, participating in the PJM market.

Where is Lower Mount Bethel Energy located?

Lower Mount Bethel Energy is in Northampton County, PA, inside the PJM balancing area.

Who operates Lower Mount Bethel Energy?

Lower Mount Bethel Energy is operated by Lower Mount Bethel Energy LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Lower Mount Bethel Energy generate?

Lower Mount Bethel Energy reported 4,451.2 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

How does Lower Mount Bethel Energy compare to other plants?

By capacity, Lower Mount Bethel Energy ranks #209 of 538 operating plants of the same technology nationally. It ranks #18 of 26 in PA.

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Natural Gas Fired Combined CyclePJM · Northampton County

Lower Mount Bethel Energy

Talen Energy · Northampton County · PJM

Lower Mount Bethel Energy is a natural gas-fired power facility with 651.6 MW of EIA-reported nameplate capacity in Northampton County, Pennsylvania, registered as EIA Plant ID 55667. Lower Mount Bethel Energy LLC is the registered plant entity or operator. The plant's generating configuration is natural-gas-fired combined-cycle plant with two combustion turbines and one steam turbine.

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plant:plant-55667

Ask about Lower Mount Bethel Energy

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

Overview

Key fields

Reported capacity: 651.6 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combined Cycle
Primary generation technology.
Registry anchor: Plant 55667
Lower Mount Bethel Energy LLC · Northampton County · PJM
Operating status: Operating
Lower Mount Bethel Energy is currently operating; a closure or retirement is listed for August 2, 2026.
Project financing: $450M
On October 30, 2018, Talen Energy Supply, LLC announced that its wholly owned project subsidiary, LMBE-MC HoldCo II LLC, had commenced a $450 million senior secured seven-year Project Term Loan B Facility.

Profile

Operating status: Lower Mount Bethel Energy is currently operating; a closure or retirement is listed for August 2, 2026.
Physical build: Natural gas-fired combined-cycle plant with three generating units: two Siemens SGT6-5000F gas turbines rated at 211.5 MW each, one Siemens Energy steam turbine rated at 228.6 MW, and a NEM Energy steam boiler. The facility has 651.6 MW of total nameplate capacity.
Financing: On October 30, 2018, Talen Energy Supply, LLC announced that its wholly owned project subsidiary, LMBE-MC HoldCo II LLC, had commenced a $450 million senior secured seven-year Project Term Loan B Facility.

Structured profile

Reported capacity: 651.6 MW
Natural Gas Fired Combined Cycle
Operating status: operating
Lower Mount Bethel Energy is currently operating; a closure or retirement is listed for August 2, 2026.
Retirement: August 2, 2026
Lower Mount Bethel Energy is currently operating; a closure or retirement is listed for August 2, 2026.
Location: Northampton County
PJM

Units and generators

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

Generator	Capacity	Technology	Operation	Status
G1	211.5 MW 195.3 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	May 2004	Operating
G2	211.5 MW 191.3 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	May 2004	Operating
G3	228.6 MW 215 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CA	May 2004	Operating

Performance

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

Peer context

Technology capacity: 651.6 MW
National rank: #209
PA rank: #18

Monthly generation

Download CSV

Latest 12 months

4.45 TWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

78.6%

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

0.2 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.

Transactions and agreements

Long-Term Service Contract Extension (O&M)

Jun 10, 2015

Talen Energy awarded Siemens 20-year long-term service contract extension covering scheduled maintenance, spare parts, diagnostics, and monitoring for two SGT6-5000F gas turbines.

20 yearsTalen Energy Corp. · Siemens

Siemens signs extension contracts for two Pennsylvania power plants

Land and environmental record

Air Plan Approval

Feb 5, 2019

Plan Approval No. 48-00091B issued February 5, 2019.

Pennsylvania DEP Plan Approval 48-00091B identifies design and construction authorization for plant sources. Historical permit revision noted January 29, 2019.

Source

Cooling And Water Records

Cooling tower (Source ID 105) permitted under Title V permit. No standalone Lower Mount Bethel Energy NPDES water discharge permit identified.

Title V Permit 48-00091 identifies cooling tower as permitted source. Cooling tower blowdown water subject to total dissolved/suspended solids limit of 1250 ppmw. Related facility (Martins Creek Steam Electric Station) holds NPDES Permit PA0012823; fact sheet notes Martins Creek industrial waste treatment basin receives similar wastewater from Lower Mount Bethel Energy and Martins Creek stormwater outfall 011 conveys stormwater from Lower Mount Bethel plant.

1364221[48-00091]_Issued_v1.pdf

Permitted Emissions Limits

Jan 19, 2023

Facility-wide rolling emissions limits (consecutive 12-month basis, including startup/shutdown): NOx 208.8 tons/year; CO 498.2 tons/year; VOC 46.6 tons/year. Single-HAP emissions <10 tons/year; total HAPs <25 tons/year.

Title V Permit 48-00091 Condition #007 establishes facility-wide emission limits. These are permit authorization limits, not reported actual emissions. Limits apply on 30-operating-day rolling average for NOx.

1364221[48-00091]_Issued_v1.pdf

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.

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AssetOwner / operatorProject companyContractor

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

May 2004
May 2004
Generators enter operationEIA-860
EIA-860 lists generator G1, generator G2, generator G3 with this operating date.
Jun 1, 2015
Jun 1, 2015
Ownership transfer to Talen Energy

Lower Mount Bethel Energy

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Lower Mount Bethel Energy

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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

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Parties and identifiers

Reporting portfolio

Sources

Common questions about Lower Mount Bethel Energy

How big is Lower Mount Bethel Energy?

What kind of plant is Lower Mount Bethel Energy?

Where is Lower Mount Bethel Energy located?

Who operates Lower Mount Bethel Energy?

How much electricity does Lower Mount Bethel Energy generate?

How does Lower Mount Bethel Energy compare to other plants?

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