Power plant · Illinois, United States
Joliet 9 Power Plant
Joliet 9 Power Plant is a closed gas power plant in Illinois, United States, with 508 MW of capacity, operated by Midwest Generations EME LLC.
Grid connection
It closed in 2023, which freed up a 508 MW grid connection at 138 kV to the grid of Commonwealth Edison Co, unless it has been reassigned since.
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 | Illinois | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Status | Closed | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Start year | 1959 | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| End year | 2023 | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Operator | Midwest Generations EME LLC | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Capacity | 508 MW (nameplate of its retired generators) | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Technology | Natural Gas Steam Turbine | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Grid operator | Commonwealth Edison Co | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Voltage | 138 kV | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
| Coordinates | 41.4931, -88.1153 | EIA-860 / 860M / 923 · Public domain · checked 24 Oct 2026 |
Research on this power plant and its operator.Who owns it up to the parent company, its grid connection and planning status, and an introduction to the operator.
Request researchHow it compares
Joliet 9 is the 34th-largest of 39 power plants in Illinois and the 770th-largest of 1,009 in the United States by capacity; its 508 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 |
|---|---|---|---|
| Illinois | 34th of 39 | 40,106 MW | 1.3% |
| United States | 770th of 1,009 | 917,512 MW | <0.1% |
| All power plants in our data | 1,180th of 15,799 | 1,918,113 MW | <0.1% |
Timeline
Dated facts about this power plant from its sources, oldest first.
- Started operating
- Retired
Nearby
Within 50 km of this power plant: 27 data centers, 3 mines and 2 AI supercomputers, measured from the coordinates in the facts above. The table shows the nearest 8, up to 3 per kind.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| Romeo Quarry | Mine | — | Operating | 17 km |
| Datacenter (386) | Data center | — | — | 26 km |
| Argonne NL Polaris | AI supercomputer | 706 H100e | Operating | 28 km |
| Lincoln Rackhouse | Data center | — | — | 32 km |
| Centersquare Lisle ORD4 Data Center | Data center | — | — | 34 km |
| Vultr Chicago Cluster | AI supercomputer | 3,964 H100e | Operating | 34 km |
| McCook Quarry | Mine | — | Operating | 42 km |
| Thornton Quarry | Mine | — | Operating | 43 km |
Operator, grid operator and place
More from Midwest Generations EME LLC
- Powerton1,786 MW
- Joliet 291,320 MW
- Will County1,269 MW
- Waukegan112 MW
Other power plants in Illinois
- Braidwood Generation Station2,450 MW
- Byron Generating Station2,450 MW
- LaSalle Generating Station2,340 MW
- Dresden Generating Station2,019 MW
- Quad Cities Generating Station2,019 MW
- Powerton1,786 MW
- Prairie State Generating Station1,766 MW
- Joliet 291,320 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.
- Epoch AI. Epoch AI supercomputers, CC BY 4.0.
- 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.