Commonwealth Chesapeake
Tyr Energy, Inc.Accomack County
Commonwealth Chesapeake is a petroleum liquids facility with 402.5 MW of EIA-reported nameplate capacity in Accomack County, Virginia, registered as EIA Plant ID 55381. Tyr Energy, Inc. is the current owner; Commonwealth Chesapeake Co LLC is the registered plant entity or operator. The plant's generating configuration is seven GE LM6000 PC simple-cycle combustion turbines fired only on diesel fuel and CT1–CT3 installed in 2000 and CT4–CT7 installed in 2001. Tyr Energy, Inc. acquired the project from Tenaska Capital Management in 2008.
Mapped infrastructure geometry associated with this asset.
Petroleum Liquids
Commonwealth Chesapeake is currently operating; a closure or retirement is listed for August 2, 2026.
PJM
EIA plant 55381 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| UNT1 | Petroleum Liquids | Operating | 57.5 | Unknown |
| UNT2 | Petroleum Liquids | Operating | 57.5 | Unknown |
| UNT3 | Petroleum Liquids | Operating | 57.5 | Unknown |
| UNT4 | Petroleum Liquids | Operating | 60.5 | Unknown |
| UNT5 | Petroleum Liquids | Operating |
Similar plants ranked by technology, capacity, and distance.
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| UNT1 | 57.5 MW 45.4 MW summer | Petroleum Liquids GT | Aug 2000 | Operating |
| UNT2 | 57.5 MW 44.3 MW summer | Petroleum Liquids GT | Sep 2000 | Operating |
| UNT3 | 57.5 MW 45.8 MW summer | Petroleum Liquids GT | Sep 2000 | Operating |
| UNT4 | 60.5 MW 43.3 MW summer | Petroleum Liquids GT | Jun 2001 | Operating |
| UNT5 | 60.5 MW 45.8 MW summer | |||
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.
The first three GE LM6000 simple-cycle units entered commercial service in 2000. Contemporary reporting states that phase-one foundations had been poured and equipment installed as the units approached startup.
PJM · Accomack County
| 60.5 |
| Unknown |
| UNT6 | Petroleum Liquids | Operating | 60.5 | Unknown |
|---|
| UNT7 | Petroleum Liquids | Operating | 60.5 | Unknown |
|---|
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 UNT1 with this operating date.
EIA-860 lists generator UNT2, generator UNT3 with this operating date.
Four additional LM6000 units were added in 2001, bringing the facility to seven generating units.
EIA-860 lists generator UNT4, generator UNT5, generator UNT6 with this operating date.
EIA-860 lists generator UNT7 with this operating date.
Tenaska Capital Management signed an agreement in mid-January 2005 to acquire Commonwealth Chesapeake from TECO Energy for $89 million; the transaction was expected to close by the end of March.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Commonwealth Chesapeake reports 414.5 MW petroleum of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
Commonwealth Chesapeake is a Petroleum Liquids facility in Accomack County, VA, participating in the PJM market.
Commonwealth Chesapeake is in Accomack County, VA, inside the PJM balancing area.
Commonwealth Chesapeake is operated by Commonwealth Chesapeake Co LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Commonwealth Chesapeake reports a commercial operation date of 2000. Current status: operating. Source: EIA Sep 2026.
Commonwealth Chesapeake reported 98.9 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
By capacity, Commonwealth Chesapeake ranks #18 of 726 operating plants of the same technology nationally. It ranks #1 of 23 in VA.
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.