How big is Shell Chemical Appalachia LLC?

Shell Chemical Appalachia LLC has a reported capacity of 309.8 MW. Source: EIA Form 860.

What kind of plant is Shell Chemical Appalachia LLC?

Shell Chemical Appalachia LLC is a Natural Gas Fired Combined Cycle facility in Beaver County, PA, participating in the PJM market.

Where is Shell Chemical Appalachia LLC located?

Shell Chemical Appalachia LLC is in Beaver County, PA, inside the PJM balancing area.

Who operates Shell Chemical Appalachia LLC?

Shell Chemical Appalachia LLC is operated by Shell Chemical Appalachia LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Shell Chemical Appalachia LLC generate?

Shell Chemical Appalachia LLC reported 1,605 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

Where does Shell Chemical Appalachia LLC connect to the grid?

Shell Chemical Appalachia LLC interconnects at Potter 138-kV substation, on the Duquesne Light Company (DLCO) system.

How does Shell Chemical Appalachia LLC compare to other plants?

By capacity, Shell Chemical Appalachia LLC ranks #357 of 538 operating plants of the same technology nationally. It ranks #23 of 26 in PA.

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Natural Gas Fired Combined CyclePJM · Beaver County

Shell Chemical Appalachia LLC

Shell Chemical Appalachia LLC · Beaver County · PJM

Shell Chemical Appalachia LLC is a natural gas-fired power facility with 309.8 MW of EIA-reported nameplate capacity in Beaver County, Pennsylvania, registered as EIA Plant ID 58933. Shell Chemical Appalachia LLC owns and operates the plant, a subsidiary of Shell plc. EIA plant 58933 is an operational PJM industrial combined-heat-and-power facility with five gas generators and 309.8 MW of nameplate capacity. Its first generating unit entered service on July 1, 2021, supporting Shell’s large-scale Shell Polymers Monaca petrochemical complex.

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plant:plant-58933

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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: 309.8 MW
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Technology: Natural Gas Fired Combined Cycle
Primary generation technology.
Registry anchor: Plant 58933
Shell Chemical Appalachia LLC · Beaver County · PJM
Operating status: Operating
Shell Chemical Appalachia LLC is operating.
Grid connection: Potter 138-kV substation
138 kV · Duquesne Light Company (DLCO)

Profile

Grid role: Industrial combined heat and power/cogeneration facility supplying onsite electricity and steam, with excess electricity sold to the PJM-region grid.
Grid connection: Potter 138-kV substation · 138 kV · Duquesne Light Company (DLCO).
Context: EIA plant 58933 is an operational PJM industrial combined-heat-and-power facility with five gas generators and 309.8 MW of nameplate capacity. Its first generating unit entered service on July 1, 2021, supporting Shell’s large-scale Shell Polymers Monaca petrochemical complex.
Physical build: Shell Chemical Appalachia LLC’s EIA plant 58933 is a 309.8 MW natural-gas combined-cycle cogeneration facility with five generating units. The Shell Polymers Monaca build includes three identical GE Frame 6B combustion turbines with natural-gas duct burners, HRSGs, two 75.6 MWe steam turbines, generator step-up transformers, and a six-cell cogeneration cooling tower. Project descriptions characterize the power plant as approximately 275 MW, while the EIA operating record reports 309.8 MW nameplate capacity.

Structured profile

Reported capacity: 309.8 MW
Natural Gas Fired Combined Cycle
Operating status: operating
Shell Chemical Appalachia LLC is operating.
Interconnection: Potter 138-kV substation
138 kV · Duquesne Light Company (DLCO)
Location: Beaver County
PJM
Operator

Units and generators

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

Generator	Capacity	Technology	Operation	Status
GTG1	48.4 MW 37.1 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Jul 2021	Operating
GTG2	48.4 MW 37.1 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Jul 2021	Operating
GTG3	48.4 MW 37.1 MW summer	Natural Gas Fired Combined Cycle Natural Gas · CT	Jul 2021	Operating
STG1	82.3 MW

Performance

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

Peer context

Technology capacity: 309.8 MW
National rank: #357
PA rank: #23

Monthly generation

Download CSV

Latest 12 months

1.6 TWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

2025 capacity factor

57.6%

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

RISER162063

IN SERVICE

0.2 km

RISER162062

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

EPC And Main Works Construction Completion

2022

Bechtel served as Main Works Contractor for construction, commissioning, and startup of Shell Polymers Monaca, which includes a 275 MW power plant. Construction completed in 2022. No EPC contract value or separately allocated power-plant financing disclosed.

275 MW contractedShell Chemical Appalachia LLC · Bechtel

Pennsylvania Chemicals - Bechtel

PJM Interconnection Development

2015

January 2015 PJM Facility Study for Shell Chemical Appalachia queue Y3-103 described 205 MW proposed net output with 97 MW recognized by PJM as capacity. Study was interim step toward Interconnection Service Agreement; final agreement execution not established.

97 MW contractedShell Chemical Appalachia LLC · PJM Interconnection LLC

Shell Chemical nears air permit for 250-MW power project in Pennsylvania

Land and environmental record

Air Compliance Violation

Jun 22, 2026

June 22, 2026 Notice of Violation for NOx exceedance; 328.5 tons 12-month rolling limit

DEP issued Notice of Violation for PA-04-00740C after Shell exceeded 12-month rolling nitrogen-oxide limit of 328.5 tons in May 2026. Notice identifies Shell Chemical Appalachia LLC, PFID 775836, Potter Township, Beaver County.

NOTICE OF VIOLATION

Air Plan Approval And Cogeneration Sources

Mar 19, 2025

PADEP Plan Approval 04-00740C; three combustion turbine/duct-burner units (101, 102, 103)

Plan Approval 04-00740C, PFID 775836, identifies three combustion turbine/duct-burner sources (Units 101, 102, 103). Each is a natural-gas-fired GE Frame 6B unit rated 41.5 MW with natural-gas-fired duct burners.

Source

Authorized Discharge And Receiving Water

Feb 24, 2021

Ohio River and Poorhouse Run receiving waters via permitted outfalls

NPDES documentation identifies primary treated-wastewater discharge at Outfall 001 to Ohio River, with Outfall 008 to Poorhouse Run and Outfall 013 to Ohio River. Permitted wastewater includes process water, wastewater, stormwater from treatment plant, and cooling-tower blowdown.

Source

County Appraisal Record Derived Subtotal

Jun 30, 2023

Shell Chemical Appalachia LLC county appraisal parcels: 379.047 acres from acreage-specified parcels

Beaver County Potter Township appraisal roll lists Shell Chemical Appalachia LLC as owner of parcels including 731630188000 (12.31 ac), 731630198000 (89.73 ac), 731720201000 (54.18 ac), 731730243001 (10.46 ac), 731730243002 (0.866 ac), 731730244000 (0.993 ac), 731730246000 (178.47 ac), 731730249002 (5.33 ac), 731730252001 (0.86 ac), 731730253000 (1.05 ac), 731730257000 (11.74 ac), 731730258000 (8.09 ac), 731730246001 (4.11 ac), 731730252000 (0.858 ac), plus additional lots with descriptions but no acreage listed.

73_POTTER_TWP.XLSX

Emissions Control And Compliance Testing

May 6, 2025

Selective catalytic reduction and oxidation catalysts; Subpart YYYY formaldehyde compliance May 6-8, 2025

Each cogeneration unit has air-pollution control system with selective catalytic reduction and oxidation catalysts. May 6-8, 2025 Subpart YYYY formaldehyde performance testing reported compliant results for combustion-turbine/duct-burner sources.

Source

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 / operatorContractorMarket / regulatorOrganization

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Apr 2013
Apr 2013
PJM Interconnection ApplicationSource
Shell’s application for the project was first filed in April 2013 under PJM queue Y3-103.
Jan 2015
Jan 2015

Shell Chemical Appalachia LLC

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Shell Chemical Appalachia LLC

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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 Shell Chemical Appalachia LLC

How big is Shell Chemical Appalachia LLC?

What kind of plant is Shell Chemical Appalachia LLC?

Where is Shell Chemical Appalachia LLC located?

Who operates Shell Chemical Appalachia LLC?

How much electricity does Shell Chemical Appalachia LLC generate?

Where does Shell Chemical Appalachia LLC connect to the grid?

How does Shell Chemical Appalachia LLC compare to other plants?

Co-located assets