MISO-J2603
320 MW generation in Mason, IL · In queue since September 2022 · Proposed COD June 2026
320 MW
Capacity
1
Components
Solar
3y 8m
In Queue
Cluster Study
IA Status
COD target: 2026
Total Duration
3y 9m
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: 2026-06-30
MISO-J2603 is a proposed solar generation project with a total capacity of 320 MW, located in Mason County, Illinois. The project is in the Midcontinent Independent System Operator (MISO) interconnection queue, with an entry date of September 15, 2022. The proposed commercial operation date is June 30, 2026. Ameren Illinois is the utility associated with the project, and its point of interconnection is the Havana-Shockey 138 kV line.
The project's interconnection status is currently in the Cluster Study phase. The developer is not specified in the available data. The project has not appeared in recent news, and there is no match to an existing operating plant in the EIA database.
Generated from interconnection queue and public data sources
State
IL
County
Mason
Grid Region
MISO (Midcontinent)
Market
ISO/RTO Member
Developer
—
Utility
AMEREN ILLINOIS
Entity
MISO
Service Type
—
Point of Interconnection
Havana-Shockey 138 kV
Data Source
LBNL + Live
- 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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