MISO-S1129
50 MW storage in Portage, WI · In queue since October 2025
50 MW
Capacity
0
Components
7 months
In Queue
—
IA Status
Total Duration
7 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-S1129 is a proposed 50 MW battery storage project located in Portage County, Wisconsin. The project is in the Midcontinent Independent System Operator (MISO) interconnection queue, having entered the queue on October 7, 2025. American Transmission Company is the utility associated with the interconnection.
The project's interconnection service type is System Impact Study (SIS), and its status is currently listed as active within the MISO queue. The point of interconnection (POI) is the Arnott - Golden Sands 138.0kV substation.
Generated from interconnection queue and public data sources
State
WI
County
Portage
Grid Region
MISO (Midcontinent)
Market
ISO/RTO Member
Developer
—
Utility
AMERICAN TRANSMISSION COMPANY
Entity
MISO
Service Type
SIS
Point of Interconnection
Arnott - Golden Sands 138.0kV
Data Source
Live · MISO
- ISO / RTO
- MISO
- Trading Hub
- MINN.HUB
- Hub Confidence
- HIGH
- POI Substation
- Golden Sands
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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