Zion Energy Center is a natural gas-fired power facility with 596.7 MW of EIA-reported nameplate capacity in Lake County, Illinois, registered as EIA Plant ID 55392. Zion Energy LLC owns and operates the plant. It operates in the PJM market as a dual-fuel peaking facility.
EIA-reported nameplate capacity; other nameplate and seasonal ratings may differ.
Primary generation technology.
Zion Energy LLC · Lake County · PJM
Zion Energy Center is operating.
345 kV · Commonwealth Edison (ComEd)
Natural Gas Fired Combustion Turbine
Zion Energy Center is operating.
345 kV · Commonwealth Edison (ComEd)
PJM
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| CTG1 | 198.9 MW 161 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 2002 | Operating |
| CTG2 | 198.9 MW 162 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 2002 | Operating |
| CTG3 | 198.9 MW 155 MW summer | Natural Gas Fired Combustion Turbine Natural Gas · GT | Jun 2003 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
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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Project milestones and public references behind the asset profile.
EIA-860 lists generator CTG1, generator CTG2 with this operating date.
PJM · Lake County
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
EIA-860 lists generator CTG3 with this operating date.
An affiliate of Energy Capital Partners and a consortium including Access Industries and Canada Pension Plan Investment Board completed the acquisition of Calpine from its stockholders. Calpine stockholders were to receive $15.25 per share; ECP describes the take-private as a $17 billion transaction that closed in March 2018. This was an indirect parent-level ownership change for Zion, not a separately priced Zion sale.
Constellation announced a cash-and-stock agreement to acquire Calpine at an equity purchase price of approximately $16.4 billion, comprising 50 million Constellation shares and $4.5 billion cash plus assumed Calpine net debt of approximately $12.7 billion.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Zion Energy Center has a reported capacity of 596.7 MW. Source: EIA Form 860.
Zion Energy Center is a Natural Gas Fired Combustion Turbine facility in Lake County, IL, participating in the PJM market.
Zion Energy Center is in Lake County, IL, inside the PJM balancing area.
Zion Energy Center is operated by Zion Energy LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Zion Energy Center reported 363.6 GWh over the twelve months to 2024-12. Figures are net generation as filed to EIA-923.
Zion Energy Center interconnects at Zion Energy Center Substation, on the Commonwealth Edison (ComEd) system.
By capacity, Zion Energy Center ranks #65 of 825 operating plants of the same technology nationally. It ranks #7 of 37 in IL.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
