MISO-S1117
200 MW storage in New Madrid, MO · In queue since August 2025
200 MW
Capacity
0
Components
9 months
In Queue
—
IA Status
Total Duration
9 months
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)
Commercial operation date not yet determined
MISO-S1117 is a proposed 200 MW battery storage project located in New Madrid County, Missouri. The project is listed in the Midcontinent Independent System Operator (MISO) interconnection queue, with an entry date of August 31, 2025. Entergy Arkansas, LLC is the utility associated with the project.
The proposed project is currently in active status within the MISO queue, undergoing a System Impact Study (SIS). The point of interconnection (POI) is the Marston 161 kV substation.
Generated from interconnection queue and public data sources
State
MO
County
New Madrid
Grid Region
MISO (Midcontinent)
Market
ISO/RTO Member
Developer
—
Utility
ENTERGY ARKANSAS, LLC
Entity
MISO
Service Type
SIS
Point of Interconnection
Marston 161 kV
Data Source
Live · MISO
- ISO / RTO
- MISO
- Trading Hub
- ILLINOIS.HUB
- Hub Confidence
- HIGH
- POI Substation
- Mauston
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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