PSE-60
200 MW storage in Pierce, WA · In queue since August 2018 · Proposed COD December 2025
200 MW
Capacity
1
Components
Battery
7y 9m
In Queue
IA Executed
IA Status
COD target: 2025
Total Duration
7y 4m
Schedule
4 months past proposed COD
Interconnection request submitted to ISO/RTO
Project undergoes interconnection studies to assess grid impact.
Typical: 18–36 months
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2025-12-31
PSE-60 is a proposed 200 MW battery storage project located in Pierce County, Washington. The project, developed by Puget Sound Energy (PSE), entered the PSE interconnection queue on August 15, 2018, and has a proposed commercial operation date of December 31, 2025. The project's interconnection agreement (IA) has been executed. The point of interconnection is the Fredrickson Plant 115kV Substation.
The proposed project consists of 200 MW of battery storage capacity. It is currently listed as active in the interconnection queue. The project has appeared in recent news coverage regarding energy storage development in the Pacific Northwest.
Generated from interconnection queue and public data sources
State
WA
County
Pierce
Grid Region
Mountain West
Market
—
Developer
—
Utility
Puget Sound Energy
Entity
PSE
Service Type
—
Point of Interconnection
Fredrickson Plant 115kV Substation
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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