Power plant · New Hampshire, United States
Merrimack Power Plant
Merrimack Power Plant is a coal power plant in New Hampshire, United States, with 496 MW of capacity, owned by Granite Shore Power.
Grid connection
459 MW of its 496 MW is due to retire in 2027, 2028, which frees up that much of its grid connection at 115 kV to the grid of Public Service Co of NH.
Facts
Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.
| Fact | Value | Source |
|---|---|---|
| Location | New Hampshire | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Status | Operating | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Start year | 1960 | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Owner | Granite Shore Power | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Operator | Granite Shore Power | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Capacity | 496 MW | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Technology | Conventional Steam Coal | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Grid operator | Public Service Co of NH | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Voltage | 115 kV | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Planned retirement | 2027 (114 MW retiring, 1 unit, planned retirement reported to eia) | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Planned retirement | 2028 (346 MW retiring, 1 unit, planned retirement reported to eia) | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Coordinates | 43.1411, -71.4692 | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
Research on this power plant and its owner.Who owns it up to the parent company, its grid connection and planning status, and an introduction to the owner.
Request researchHow it compares
Merrimack is the 4th-largest of 4 power plants in New Hampshire and the 790th-largest of 1,009 in the United States by capacity; its 496 MW is <0.1% of the 917,512 MW we hold for the United States. Ranks and totals cover the power plants in our data that report their capacity, not every one in existence. Power plants planned, permitted or under construction are ranked apart.
| Within | Rank | Total | Share |
|---|---|---|---|
| New Hampshire | 4th of 4 | 3,134 MW | 16% |
| United States | 790th of 1,009 | 917,512 MW | <0.1% |
| All power plants in our data | 1,217th of 15,799 | 1,918,113 MW | <0.1% |
Nearby
Within 50 km of this power plant: 2 data centers and 1 mine, measured from the coordinates in the facts above.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| University of New Hampshire data center, Strafford County | Data center | — | — | 42 km |
| Wilton Pit | Mine | — | Closed | 43 km |
| Information Technology Data Center | Data center | — | — | 46 km |
Owner, operator, grid operator and place
Other power plants in New Hampshire
- Seabrook1,242 MW
- Granite Ridge790 MW
- Newington Energy Center606 MW
Data on this page
- Contains public sector information licensed under the Open Government Licence v3.0. DUKES 5.11: Power stations in the United Kingdom, Open Government Licence v3.0.
- Contains public sector information licensed under the Open Government Licence v3.0. DESNZ Renewable Energy Planning Database (REPD), Open Government Licence v3.0.
- Source: U.S. Energy Information Administration (Sep 2026). EIA-860 / 860M / 923, Public domain.
- JRC Open Power Plants Database (JRC-PPDB-OPEN), European Commission, Joint Research Centre. JRC Open Power Plants Database (JRC-PPDB-OPEN), CC BY 4.0.
- Bundesnetzagentur, Marktstammdatenregister. Marktstammdatenregister, DL-DE-BY-2.0.
- MSHA Mines Data Set. MSHA Mines Data Set, Public domain.
- Dutch power station owners' and operators' pages. Dutch power station owners' and operators' pages, Facts only, each linked to its page.
- © OpenStreetMap contributors. OpenStreetMap data centers, ODbL 1.0.
- Contains public sector information licensed under the Open Government Licence v3.0. Planning Inspectorate: National Infrastructure Projects, Open Government Licence v3.0.
- RVO SDE(+)(+) projecten in beheer and SDE viewer. RVO SDE(+)(+) projecten in beheer and SDE viewer, Free reuse, no attribution required.
- Wikidata. Wikidata, CC0 1.0.