Millstone is a two-unit nuclear station in Waterford, Connecticut, operating in ISO New England. Current EIA records total 2,259.9 MW of nameplate capacity across Units 2 and 3.
Mapped infrastructure geometry associated with this asset.
EIA plant 566 · Inventory for Aug 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| 2 | Nuclear | Operating | 909.9 | Unknown |
| 3 | Nuclear | Operating | 1,350 | Unknown |
| 1 | Nuclear | Retired | 661.5 | Unknown |
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 2 | 909.9 MW 863.4 MW summer | Nuclear Nuclear · ST | Dec 1975 | Operating |
| 3 | 1,350 MW 1,245 MW summer | Nuclear Nuclear · ST | Apr 1986 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
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.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
Project milestones and public references behind the asset profile.
EIA-860 lists generator 2 with this operating date.
EIA-860 lists generator 3 with this operating date.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Millstone reports 2,259.9 MW nuclear of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Aug 2026.
Millstone is a nuclear facility in New London County, CT, participating in the ISO-NE market.
Millstone is in New London County, CT, inside the ISO-NE balancing area.
Millstone is operated by Dominion Energy Nuclear Conn Inc according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Millstone reported 16,909.6 GWh over the twelve months to 2026-07. Figures are net generation as filed to EIA-923.
By capacity, Millstone ranks #20 of 54 operating plants of the same technology nationally. It ranks #1 of 1 in CT.
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.
