# Shell Chemical Appalachia LLC

PJM Natural Gas Fired Combined Cycle · https://askthegrid.com/assets/facilities/shell-chemical-appalachia-llc

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.

## Key facts

- Technology: Natural Gas Fired Combined Cycle
- Power capacity: 309.8 MW
- Operating status: operating

## Grid and market context

- ISO/RTO: PJM
- Balancing authority: PJM
- Substation: Potter 138-kV substation
- Point of interconnection: Potter 138-kV substation
- Transmission owner: Duquesne Light Company (DLCO)
- Interconnection voltage: 138 kV

## Source-backed facts

- Identifiers.12: {"value":"PA0002208","system":"Pennsylvania DEP NPDES permit"} — Source · confidence: high
- Parties.2: {"relationship":"Main works contractor / EPC contractor","name":"Bechtel Corporation","official_url":"https://www.bechtel.com/projects/penn-chem-shell-polymers/"} — Pennsylvania Chemicals - Bechtel · confidence: high
- Parties.3: {"relationship":"Engineering firm","name":"Jacobs","official_url":"https://www.jacobs.com/"} — Source · confidence: medium
- Parties.4: {"relationship":"Combustion-turbine OEM","name":"General Electric (GE)","official_url":"https://www.gevernova.com/gas-power/products/gas-turbines/6b"} — Source · confidence: medium
- Construction scope: 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. — Source · confidence: medium
- Construction scope: 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. — shell chemical appalachia llc shell polymers monaca site · confidence: medium
- Construction scope: 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. — Pennsylvania Chemicals - Bechtel · confidence: medium
- Product url: https://www.gevernova.com/gas-power/products/gas-turbines/6b — 6B Gas Turbine | Heavy Duty Gas Turbine | GE Vernova · confidence: medium
- Description: Shell Chemical Appalachia LLC operates EIA plant 58933 in Beaver County, Pennsylvania, within the Shell Polymers Monaca site. The cogeneration configuration comprises three GE Frame 6B natural-gas-fired combustion turbines with duct burners and two steam turbine generators, supplying electricity and steam for the petrochemical complex. Shell Chemical Appalachia LLC is a subsidiary of Shell plc. Shell took the project’s final investment decision in June 2016; construction was completed in August 2022 and operations commenced in November 2022. — Source · confidence: medium
- Description: Shell Chemical Appalachia LLC operates EIA plant 58933 in Beaver County, Pennsylvania, within the Shell Polymers Monaca site. The cogeneration configuration comprises three GE Frame 6B natural-gas-fired combustion turbines with duct burners and two steam turbine generators, supplying electricity and steam for the petrochemical complex. Shell Chemical Appalachia LLC is a subsidiary of Shell plc. Shell took the project’s final investment decision in June 2016; construction was completed in August 2022 and operations commenced in November 2022. — Source · confidence: medium
- Quality notes: ["Current plant-directory data identifies five operating gas generators totaling 309.8 MW, while the Pennsylvania DEP report specifically describes three GE Frame 6B combustion turbines rated at 41.5 MW each with duct burners; the steam-turbine portion accounts for the broader cogeneration configuration.","Earlier development materials described approximately 205 MW of installed capability, while Bechtel’s project page refers to a 275 MW power plant; these historical project figures are not substituted for the current 309.8 MW EIA plant-directory capacity.","No completed acquisition, sale, retirement, or repowering milestone was identified through the latest cited 2026 reporting. Reports in May 2026 described a possible sale involving the Monaca facility but stated that no decision had been made.","The interconnection record refers to development at a former St. Joe Mineral customer site and mentions an earlier Horsehead purchase of that site; this is site history, not evidence that either entity owned or sold EIA plant 58933."] — Source · confidence: medium
- Quality notes: ["Current plant-directory data identifies five operating gas generators totaling 309.8 MW, while the Pennsylvania DEP report specifically describes three GE Frame 6B combustion turbines rated at 41.5 MW each with duct burners; the steam-turbine portion accounts for the broader cogeneration configuration.","Earlier development materials described approximately 205 MW of installed capability, while Bechtel’s project page refers to a 275 MW power plant; these historical project figures are not substituted for the current 309.8 MW EIA plant-directory capacity.","No completed acquisition, sale, retirement, or repowering milestone was identified through the latest cited 2026 reporting. Reports in May 2026 described a possible sale involving the Monaca facility but stated that no decision had been made.","The interconnection record refers to development at a former St. Joe Mineral customer site and mentions an earlier Horsehead purchase of that site; this is site history, not evidence that either entity owned or sold EIA plant 58933."] — Shell will act on possible chemicals division sale that... · confidence: medium
- Financing summary: Shell announced the final investment decision in June 2016, while the reported $14 billion figure refers to the broader Shell Polymers Monaca petrochemical plant’s construction cost rather than disclosed financing for the on-site power facility. No completed sale transaction or transaction month/year was reported; in May 2026, a possible sale involving the Monaca facility remained undecided. — Shell acknowledges $14 billion price tag for petrochemical... · confidence: medium
- Financing summary: Shell announced the final investment decision in June 2016, while the reported $14 billion figure refers to the broader Shell Polymers Monaca petrochemical plant’s construction cost rather than disclosed financing for the on-site power facility. No completed sale transaction or transaction month/year was reported; in May 2026, a possible sale involving the Monaca facility remained undecided. — Shell will act on possible chemicals division sale that... · confidence: medium
- Timeline: [{"event":"PJM interconnection application","date":"2013-04","detail":"Shell’s application for the project was first filed in April 2013 under PJM queue Y3-103."},{"event":"PJM facility-study configuration","date":"2015-01","detail":"A January 2015 PJM facility study described the proposed project as three gas turbine generators and two steam turbine generators, with approximately 205 MW of installed capability."},{"event":"Final investment decision","date":"2016-06-07","detail":"Shell Chemical Appalachia LLC took the final investment decision to build the Pennsylvania petrochemical complex, including the associated on-site power and steam facilities."},{"event":"First generating unit online","date":"2021-07-01","detail":"The first unit of EIA plant 58933 entered service."},{"event":"Steam-turbine operation","date":"2021-10","detail":"STG1 was recorded as operating in October 2021."},{"event":"Construction completed","date":"2022-08","detail":"Shell completed construction of the Shell Polymers Monaca complex."},{"event":"Commercial operations commenced","date":"2022-11","detail":"Shell Chemical Appalachia LLC commenced operations at the Shell Polymers Monaca site."},{"event":"Potential sale remained unresolved","date":"2026-05","detail":"Contemporary reporting said Shell was considering a sale involving the Monaca facility, but no decision had been made and no completed transaction, buyer, seller change, or transaction value was reported."}] — Shell will act on possible chemicals division sale that... · confidence: medium
- Timeline.1: {"event":"PJM facility-study configuration","date":"2015-01","detail":"A January 2015 PJM facility study described the proposed project as three gas turbine generators and two steam turbine generators, with approximately 205 MW of installed capability."} — Source · confidence: high
- Timeline.7: {"event":"Potential sale remained unresolved","date":"2026-05","detail":"Contemporary reporting said Shell was considering a sale involving the Monaca facility, but no decision had been made and no completed transaction, buyer, seller change, or transaction value was reported."} — Shell will act on possible chemicals division sale that... · confidence: medium
- Commercial parties.2: {"relationship":"Main works contractor / EPC contractor","name":"Bechtel Corporation","detail":"Bechtel served as the main works contractor for the Pennsylvania Chemicals project’s construction, commissioning, and startup, including the power plant.","official_url":"https://www.bechtel.com/"} — Pennsylvania Chemicals - Bechtel · confidence: high
- Commercial parties.4: {"relationship":"Combustion-turbine OEM","name":"General Electric (GE)","detail":"The Pennsylvania DEP report identifies three GE Frame 6B natural-gas-fired combustion turbines, each rated at 41.5 MW; GE Vernova’s official 6B product page provides the current OEM product reference.","official_url":"https://www.gevernova.com/gas-power/products/gas-turbines/6b"} — Source · confidence: medium
- Quality notes.0: Current plant-directory data identifies five operating gas generators totaling 309.8 MW, while the Pennsylvania DEP report specifically describes three GE Frame 6B combustion turbines rated at 41.5 MW each with duct burners; the steam-turbine portion accounts for the broader cogeneration configuration. — Source · confidence: medium
- Quality notes.1: Earlier development materials described approximately 205 MW of installed capability, while Bechtel’s project page refers to a 275 MW power plant; these historical project figures are not substituted for the current 309.8 MW EIA plant-directory capacity. — Source · confidence: high
- Quality notes.1: Earlier development materials described approximately 205 MW of installed capability, while Bechtel’s project page refers to a 275 MW power plant; these historical project figures are not substituted for the current 309.8 MW EIA plant-directory capacity. — Pennsylvania Chemicals - Bechtel · confidence: high
- Quality notes.2: No completed acquisition, sale, retirement, or repowering milestone was identified through the latest cited 2026 reporting. Reports in May 2026 described a possible sale involving the Monaca facility but stated that no decision had been made. — Shell will act on possible chemicals division sale that... · confidence: medium
- Quality notes.2: No completed acquisition, sale, retirement, or repowering milestone was identified through the latest cited 2026 reporting. Reports in May 2026 described a possible sale involving the Monaca facility but stated that no decision had been made. — Our growth projects · confidence: medium
- Later sale or transfer: No completed sale or ownership transfer is documented in the available record: in August 2025 Shell said no sale had been announced, and on May 13, 2026 Shell said nothing had been decided. — Shell will act on possible chemicals division sale that includes Monaca plant if it creates value – WPXI · confidence: medium
- Transaction scope: unsupported — Shell will act on possible chemicals division sale that includes Monaca plant if it creates value – WPXI · confidence: medium
- Grid role: Industrial combined heat and power/cogeneration facility supplying onsite electricity and steam, with excess electricity sold to the PJM-region grid. — Shell Chemical nears air permit for 250-MW power project in Pennsylvania · confidence: medium

## Timeline

- 2013-04 — PJM interconnection application
  Shell’s application for the project was first filed in April 2013 under PJM queue Y3-103.
  Source: Source (https://power-eng.com/environmental-emissions/shell-chemical-nears-air-permit-for-250-mw-power-project-in-pennsylvania)
- 2015-01 — PJM facility-study configuration
  A January 2015 PJM facility study described the proposed project as three gas turbine generators and two steam turbine generators, with approximately 205 MW of installed capability.
  Source: Source (https://power-eng.com/environmental-emissions/shell-chemical-nears-air-permit-for-250-mw-power-project-in-pennsylvania)

## Sources

- [Our growth projects](https://www.shell.com/business-customers/chemicals/about-shell-chemicals/our-growth-projects.html) — shell.com · tier other
- [Shell Chemical nears air permit for 250-MW power project in Pennsylvania](https://www.power-eng.com/environmental-emissions/shell-chemical-nears-air-permit-for-250-mw-power-project-in-pennsylvania/) — power-eng.com · tier other
- [Source](https://files.dep.state.pa.us/regionalresources/swro/SWROPortalFiles/Shell/Shell%20NPDES%20Submitted%20and%20updated%2011.17.15.pdf) — files.dep.state.pa.us · tier other
- [Source](https://files.dep.state.pa.us/regionalresources/swro/SWROPortalFiles/Shell/7-16-25/Shell_Chemical_Appalachia_Cogen_Subpart_YYYY_Test_Report_20250630.pdf) — files.dep.state.pa.us · tier other
- [Pennsylvania Chemicals - Bechtel](https://www.bechtel.com/projects/penn-chem-shell-polymers/) — bechtel.com · tier other
- [Source](https://power-eng.com/environmental-emissions/shell-chemical-nears-air-permit-for-250-mw-power-project-in-pennsylvania) — power-eng.com · tier other
- [Source](https://files.dep.state.pa.us/regionalresources/SWRO/SWROPortalFiles/Shell/5-2-25/2024.09.13_04-00740D_Application.pdf) — files.dep.state.pa.us · tier other
- [shell chemical appalachia llc shell polymers monaca site](https://files.dep.state.pa.us/regionalresources/SWRO/SWROPortalFiles/Shell/11-6-25/Shell_Chemical_Appalachia_NPDES_Permit_Application_Resubmittal_20250829.pdf) — files.dep.state.pa.us · tier other
- [6B Gas Turbine | Heavy Duty Gas Turbine | GE Vernova](https://www.gevernova.com/gas-power/products/gas-turbines/6b) — gevernova.com · tier other
- [Shell will act on possible chemicals division sale that includes Monaca plant if it creates value – WPXI](https://www.wpxi.com/news/local/ceo-says-shell-will-act-possible-chemicals-division-sale-that-includes-monaca-plant-only-if-it-cr/QC45564EPFGAVME3TFQBSSJXR4/) — wpxi.com · tier other
- [Shell takes final investment decision to build a new petrochemicals complex in Pennsylvania, US | Shell Global](https://www.shell.com/business-customers/chemicals/media-releases/2016-media-releases/shell-final-investment-decision-petrochemicals-complex-pennsylvania.html) — shell.com · tier other
- [Shell acknowledges $14 billion price tag for petrochemical ...](https://ieefa.org/resources/shell-acknowledges-14-billion-price-tag-petrochemical-plant-more-double-street-estimates) — ieefa.org · tier other
- [Shell leaders mull possible sale of Beaver County cracker plant - CBS Pittsburgh](https://www.cbsnews.com/pittsburgh/news/shell-cracker-plant-beaver-county-possible-sale/) — cbsnews.com · tier other
- [Pennsylvania's Petrochemical 'Renaissance' Hasn't ...](https://www.desmog.com/2026/07/09/pennsylvanias-petrochemical-renaissance-hasnt-panned-out/) — desmog.com · tier other

## Data quality

- Current plant-directory data identifies five operating gas generators totaling 309.8 MW, while the Pennsylvania DEP report specifically describes three GE Frame 6B combustion turbines rated at 41.5 MW each with duct burners; the steam-turbine portion accounts for the broader cogeneration configuration. Earlier development materials described approximately 205 MW of installed capability, while Bechtel’s project page refers to a 275 MW power plant; these historical project figures are not substituted for the current 309.8 MW EIA plant-directory capacity. No completed acquisition, sale, retirement, or repowering milestone was identified through the latest cited 2026 reporting. Reports in May 2026 described a possible sale involving the Monaca facility but stated that no decision had been made. The interconnection record refers to development at a former St. Joe Mineral customer site and mentions an earlier Horsehead purchase of that site; this is site history, not evidence that either entity owned or sold EIA plant 58933.

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