Replacing 864 MW of coal with Natural Gas Generators; Castle Bluff
824 MW hybrid in St. Louis, MO · In queue since May 2024 · Proposed COD December 2025
824 MW
Capacity
1
Components
Gas
2y 5m
In Queue
—
IA Status
COD target: 2025
One connected view of the asset's ownership, operating or development evidence, grid context, commercial relationships, history, and forward outlook.
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Total Duration
1y 7m
Schedule
10 months past proposed COD
Interconnection request submitted to ISO/RTO
MISO uses the Definitive Planning Phase (DPP) process with 3 study phases.
Typical: 30–40 months (historical); 12 months target
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2025-12-31
Castle Bluff, identified in the Midcontinent Independent System Operator (MISO) interconnection queue as MISO-R1047, is a proposed natural gas generation project in St. Louis County, Missouri. As described in its queue entry, the project would replace 864 MW of coal-fired generation with natural gas generators. It has a total proposed capacity of 824 MW, all of it gas-fired. The queue lists the project as a hybrid with technology categories of gas and "other," but the gas units are its only specified component. The associated utility is Ameren Missouri.
The project entered the MISO queue on May 28, 2024, and its status is active. It would connect to the grid at the Meramec Substation at 138 kV. The project has requested Network Resource Interconnection Service (NRIS). Its proposed commercial operation date is December 31, 2025. The available data does not indicate the status of an interconnection agreement.
Generated from interconnection queue and public data sources
Realization risk before commercial operation — cluster-study clearance, IA timing, counterparty mix, and withdrawal probability vs cohort. The diligence view that determines whether this project is worth pursuing. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
MO
County
St. Louis
Grid Region
MISO (Midcontinent)
Market
ISO/RTO Member
Developer
—
Utility
AMEREN MISSOURI
Entity
MISO
Service Type
NRIS
Point of Interconnection
Meramec Substation 138kV
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile would look like once it reaches commercial operation. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.
See the full risk decomposition + scenarios for this project.
Forward generation outlook — what this project would produce assuming it reaches commercial operation. Probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios, conditioned on the proposed COD. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this project.
Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. The bankability view that determines whether the deal clears its covenants once online. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- ISO / RTO
- MISO
- Trading Hub
- ILLINOIS.HUB
- Hub Confidence
- MEDIUM
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
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Ask about Replacing 864 MW of coal with Natural Gas Generators; Castle BluffForward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
