Castle Bluff Energy Center
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Castle Bluff Energy Center is a power station under construction in Oakville, St Louis, Missouri, United States.
Location
Table 1: Project-level location details
| Plant name | Location | Coordinates (WGS 84) |
|---|---|---|
| Castle Bluff Energy Center | Oakville, St Louis, Missouri, United States | 38.4017, -90.3358 (exact)[1][2][3][4] |
Unit-level coordinates (WGS 84):
- 1, 2, 3, 4: 38.4017, -90.3358
Project Details
Table 2: Unit-level details
| Unit name | Status | Fuel(s) | Capacity (MW) | Technology | Start year | Equipment | Emergency/Backup |
|---|---|---|---|---|---|---|---|
| 1 | Construction[5][6][4][7][8][2][9] | fossil gas: natural gas, fossil liquids: fuel oil[2] | 216[2][4] | gas turbine[2] | 2027 (planned)[4][2][1] | GE Vernova: Frame 7FA.04[2] | no |
| 2 | Construction[5][6][4][7][8][2][9] | fossil gas: natural gas, fossil liquids: fuel oil[2] | 216[2][4] | gas turbine[2] | 2027 (planned)[4][2][1] | GE Vernova: Frame 7FA.04[2] | no |
| 3 | Construction[5][6][7][8][2][9] | fossil gas: natural gas, fossil liquids: fuel oil[2] | 216[2][4] | gas turbine[2] | 2027 (planned)[1][2][4] | GE Vernova: Frame 7FA.04[2] | no |
| 4 | Construction[10][7][11][2][9] | fossil gas: natural gas, fossil liquids: fuel oil[2] | 200[2] | gas turbine[2] | 2027 (planned)[2][12][1] | GE Vernova: Frame 7FA.04[2] | no |
CHP is an abbreviation for Combined Heat and Power. It is a technology that produces electricity and thermal energy at high efficiencies. Coal units track this information in the Captive Use section when known.
Table 3: Unit-level ownership and operator details
| Unit name | Operator | Owner | Parent |
|---|---|---|---|
| 1 | Union Electric[13] | Union Electric Co [100%][14] | Union Electric Co [100.0%] |
| 2 | Union Electric[13] | Union Electric Co [100%][14] | Union Electric Co [100.0%] |
| 3 | Union Electric[13] | Union Electric Co [100%][14] | Union Electric Co [100.0%] |
| 4 | Union Electric[13] | Union Electric Co [100%][14] | Union Electric Co [100.0%] |
Impacts
Potential emissions and details on the project's status and permit applications can be viewed on Oil and Gas Watch page here.
The Oil and Gas Watch database, created by Environmental Integrity Project (EIP), is a free, public-facing tool designed to track the rapid expansion of fossil fuel and petrochemical infrastructure in the United States. Oil and Gas Watch maps new and expanding oil, gas, and petrochemical infrastructure projects across the country and monitors each project’s construction status so the public can stay informed about major oil and gas developments being proposed in their communities. We track key environmental approvals companies must obtain before starting construction or operations and provide access to thousands of government records and permits unearthed by our analysts.
Ownership Tree
This ownership tree is part of the Global Energy Ownership Tracker, a project of Global Energy Monitor.
Background
In October 2024, Union Electric Company (d/b/a Ameren Missouri) received an approval from the Missouri Public Service Commission to build, own and operate an approximately 800-MW simple-cycle gas energy center at the site of the former coal-fired Meramec Energy Center facility, which Ameren retired in 2022.[15][16] The plant will be used on a limited basis to help primarily on the hottest summer days, the coldest winter days or when renewable energy is not generating as forecasted. The construction is expected to begin in 2026, and the plant is scheduled to be commissioned in 2027.[17]
According to the Quarterly Report submitted to the Missouri Public Service Commission in April 2025, full on-site construction mobilization is planned to occur by June 2025.[18] The initial proposal for the construction of the plant included four units capable of generating 176 MW during hot summer conditions while firing gas and over 200 MW on cold winter days on fuel oil back-up each, while Form EIA-860, published by the U.S. Energy Information Administration in June 2025, mentions only three duel-fueled units of 216 MW.[1][19]
Articles and Resources
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 https://www.power-eng.com/gas/ameren-missouri-approved-to-build-800-mw-simple-cycle-facility-at-former-coal-site/.
{{cite web}}: Missing or empty|title=(help) - ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 "File No. EA-2024-0237 DIRECT TESTIMONY OF CHRISTOPHER A. STUMPF ON BEHALF OF UNION ELECTRIC COMPANY d/b/a Ameren Missouri". Missouri Public Service Commission. 2024-06-07. Archived from the original on 2025-03-07. Retrieved 2024-11-08.
- ↑ "Meramec Power Plant". Google Maps. Archived from the original on 2025-03-07. Retrieved 2024-11-08.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 https://www.eia.gov/electricity/data/eia860m/xls/april_generator2025.xlsx.
{{cite web}}: Missing or empty|title=(help) - ↑ 5.0 5.1 5.2 https://www.constructiondive.com/news/construction-starts-amid-megaproject-pullback/808649/.
{{cite web}}: Missing or empty|title=(help) - ↑ 6.0 6.1 6.2 (PDF) https://s21.q4cdn.com/448935352/files/doc_downloads/2025/03/25-02-28-2025-Change-in-Preferred-Plan-Report-Public.pdf.
{{cite web}}: Missing or empty|title=(help) - ↑ 7.0 7.1 7.2 7.3 "Annual Electric Power Industry Report, Form EIA-860 detailed data with previous form data (EIA-860A/860B) - U.S. Energy Information Administration (EIA)". www.eia.gov. 2025-09-09. Archived from the original on 2022-10-28. Retrieved 2025-11-26.
- ↑ 8.0 8.1 8.2 "Q1 2025 Quarterly Report". efis.psc.mo.gov. 2025-04-10. Archived from the original on 2025-06-27. Retrieved 2025-06-23.
- ↑ 9.0 9.1 9.2 9.3 https://efis.psc.mo.gov/Case/Display/84947.
{{cite web}}: Missing or empty|title=(help) - ↑ https://efis.psc.mo.gov/Document/Display/882820.
{{cite web}}: Missing or empty|title=(help) - ↑ https://web.archive.org/web/20230509053328/https://www.eia.gov/electricity/data/eia860m/. Archived from the original on 2023-05-09. Retrieved 2026-04-16.
{{cite web}}: Missing or empty|title=(help) - ↑ https://efis.psc.mo.gov/Document/Display/882818.
{{cite web}}: Missing or empty|title=(help) - ↑ 13.0 13.1 13.2 13.3 "ORDER APPROVING STIPULATION AND AGREEMENT AND GRANTING CERTIFICATE OF CONVENIENCE AND NECESSITY". efis.psc.mo.gov. 2024-10-30. Archived from the original on 2025-06-27. Retrieved 2025-06-23.
- ↑ 14.0 14.1 14.2 14.3 "Castle Bluff Energy Center". Ameren Missouri. Archived from the original on 2025-03-07. Retrieved 2024-11-08.
- ↑ "ORDER APPROVING STIPULATION AND AGREEMENT AND GRANTING CERTIFICATE OF CONVENIENCE AND NECESSITY". PSC MIssouri. October 30, 2024. Retrieved June 23, 2025.
{{cite web}}: CS1 maint: url-status (link) - ↑ "Ameren Missouri approved to build 800 MW simple-cycle facility at former coal site". www.power-eng.com. October 31, 2024. Retrieved June 23, 2025.
{{cite web}}: CS1 maint: url-status (link) - ↑ "Castle Bluff Energy Center". Ameren Missouri. 2025. Retrieved June 23, 2025.
{{cite web}}: CS1 maint: url-status (link) - ↑ "Docket Sheet EA-2024-0237". Missouri Public Service Commission. April 10, 2025. Retrieved June 23, 2025.
{{cite web}}: CS1 maint: url-status (link) - ↑ "Form EIA-860 detailed data with previous form data (EIA-860A/860B)". EIA. June 11, 2024. Retrieved June 23, 2025.
{{cite web}}: CS1 maint: url-status (link)
Additional data
To access additional data, including an interactive map of gas-fired power stations, a downloadable dataset, and summary data, please visit the Global Oil and Gas Plant Tracker on the Global Energy Monitor website.
