Replacing 864 MW of coal with Natural Gas Generators; Castle Bluff

Replacing 864 MW of coal with Natural Gas Generators; Castle Bluff is a 824 MW gas request in interconnection study in the MISO interconnection queue, in St. Louis County, Missouri, connecting to AMEREN MISSOURI.

Queue statusIn planning

PlanningQueued May 2024 (current stage)
Consented (not yet reached)
Construction (not yet reached)
OperatingTarget Dec 2025 (not yet reached)
Closed (not yet reached)

Studies assess what grid upgrades the project would need and who pays for them. A signed interconnection agreement is the main step before construction.

Request details

Queue ID: R1047
Grid region: MISO (Midcontinent)
Utility / transmission owner: AMEREN MISSOURI
Connection point (POI): Meramec Substation 138kV
Location: St. Louis County, Missouri
Technology: Gas: 824 MW · Other
Total requested: 824 MW
Service type: Network resource (NRIS)
Queue status: Active
Entered queue: 28 May 2024
Proposed online date: December 2025

Location

Marker shows the centre of St. Louis County; the queue data does not give exact sites.

Power plants in Missouri · Transmission lines in Missouri

Other requests in St. Louis County

Replacing 95 MW of coal with BESS; Meramec 1, 2, 3, 4Other · 98.8 MW · in study

Source: Lawrence Berkeley National Laboratory, Queued Up, data through end of 2025, compiled from ISO/RTO and utility queues. Check the grid operator's own queue for the latest status. Report a problem