NWMT-421
200 MW hybrid in Stillwater, MT · In queue since February 2022 · Proposed COD December 2025
200 MW
Capacity
1
Components
Solar
4y 3m
In Queue
Facility Study
IA Status
COD target: 2025
Total Duration
3y 10m
Schedule
5 months past proposed COD
Interconnection request submitted to ISO/RTO
Project undergoes interconnection studies to assess grid impact.
Typical: 18–36 months
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2025-12-01
The proposed NWMT-421 project is a 200 MW solar and battery hybrid development in Stillwater County, Montana. Interconnecting to NorthWestern Energy's system, the project entered the NWMT queue on February 11, 2022, and consists of 200 MW of solar capacity. The proposed commercial operation date is December 1, 2025.
The project's interconnection status is currently in the Facility Study phase. The point of interconnection is the 230 kV line between Columbus-Rapelje and Stillwater Wind.
Generated from interconnection queue and public data sources
State
MT
County
Stillwater
Grid Region
Mountain West
Market
—
Developer
—
Utility
NorthWestern Energy
Entity
NWMT
Service Type
—
Point of Interconnection
230 kV line between Columbus-Rapelje and Stillwater Wind
Data Source
LBNL
- ISO / RTO
- MOUNTAIN_WEST
- Trading Hub
- MID-C
- Hub Confidence
- UNKNOWN
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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