Castle Bluff Energy Center — Plant Summary
- EIA Plant ID
- 67576
- Capacity
- 648 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combustion Turbine
- Status
- Planned
- Location
- St Louis, MO
- Operating Since
- —
- Generators
- 3
- Operator
- Union Electric Co - (MO)
- Parent Company
- —
- Balancing Authority
- Midcontinent Independent Transmission System Operator, Inc..
- ISO/RTO
- MISO
- NERC Region
- SERC
Castle Bluff Energy Center
PlannedNatural Gas
Ranked #4 of 36 Natural Gas plants in MO#359 of 2009 nationally
648 MW Natural Gas planned in St Louis, MO — Midcontinent Independent Transmission System Operator, Inc..
EIA
648 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combustion Turbine
Technology
Planned: —
Planned Operation
Location
Coordinates
38.4017, -90.3358
County
St Louis, MO
Nearby Plants
- WaterlooDistillate Oil38.2 MW · 17.1 km
- Anheuser-Busch St LouisNatural Gas26.1 MW · 24.2 km
- SCS American Bottoms 009885 Sauget, LLCSolar1.8 MW · 25.0 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Union Electric Co - (MO) | — | — |
| Owner(s) | Union Electric Co - (MO) | — | — |
| Status | Planned | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Castle Bluff Energy Center is a 648 MW natural gas-fired power plant located in St. Louis County, Missouri. The plant is owned and operated by Union Electric Co. (MO). It consists of three natural gas-fired combustion turbine generators. The plant is connected to the Midcontinent Independent Transmission System Operator (MISO) and resides within the SERC Reliability Corporation NERC region.
Castle Bluff Energy Center is a significant power producer in Missouri, ranking as the 5th largest out of 20 power plants in the state, and 362nd nationally out of 945 plants. Recent news articles indicate a focus on grid-related topics (9 articles) and regulatory matters (1 article) concerning the plant.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
SERC
Balancing Authority
Midcontinent Independent Transmission System Operator, Inc..
Grid Voltage
138 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
No generation data available for this plant.
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
MISO
LMP Node
AMMO.MERAMEC4
Pricing Hub
ILLINOIS.HUB
Location Type
Generation Node
Node Source
Curated node match
News & Articles (10)Beta
General
Ameren Missouri Receives Approval To Build 800 MW Big Hollow Energy Center With State’s First Large-Scale Battery Storage In Jefferson County
Ameren Missouri Cleared to Construct Hybrid Natural Gas and Battery Facility, Strengthening Reliability for Homes and Businesses Statewide.
SolarQuarter·4 weeks ago
Regulatory·state puc
Mo. PSC Adds Consumer Protections to Ameren Large Load Rate Plan
The Missouri PSC approved a settlement agreement on rates for Ameren's large load customers that includes consumer protections.
Missouri PSC (regulator)Ameren (other)
RTO Insider·4 months ago
Grid·capacity addition
Ameren Missouri Announces 250-MW Reform Solar Project To Power 44,000 Homes, Create 300 Construction Jobs
Explore Ameren Missouri's new solar project that will provide electricity for 44000 homes and create 300 construction jobs.
Ameren Missouri (developer)
SolarQuarter·6 months ago
Grid·capacity addition
Ameren Missouri plans 250-MW solar facility to power 44,000 homes
Ameren Missouri is seeking approval from state regulators to build a new solar facility in central Missouri that could power tens of thousands of homes and...
Ameren Missouri (developer)
Daily Energy Insider·6 months ago
Last updated 2026-03-26
View all 10 articles