Onancock Diesel Generation Facility
Onancock Diesel Generation Facility is a 4 MW oil-fired power plant in Accomack County, Virginia, operated by Old Dominion Electric Coop. EIA-860M lists 2 generating units here, inside PJM. Its units entered service in 2002.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 4 MW
- 4 MW net summer
- Generating units
- 2
- In service
- 2002
- EIA plant ID
- 60236
Where it is
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- County
- Accomack County, Virginia
- Coordinates
- 37.7454, -75.7205
- Balancing authority
- PJM
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- Old Dominion Electric Coop
- Primary energy source
- Petroleum
- Technologies
- Petroleum Liquids
- Status
- Standby/Backup
Onancock Diesel Generation Facility: FAQ
- Where is Onancock Diesel Generation Facility?
- In Accomack County, Virginia (VA). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Onancock Diesel Generation Facility?
- 4 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
- Who owns Onancock Diesel Generation Facility?
- EIA-860M names Old Dominion Electric Coop as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Onancock Diesel Generation Facility LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Old Dominion Electric Coop here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Onancock Diesel Generation Facility LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Onancock Diesel Generation Facility still running?
- EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.