PSE-121
125 MW storage in King, WA · In queue since August 2021 · Proposed COD June 2030
125 MW
Capacity
1
Components
Battery
4y 11m
In Queue
Suspended
IA Phase
COD target: 2030
Total Duration
8y 10m
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: 2030-06-16
PSE-121 is a proposed 125 MW battery storage project located in King County, Washington. The project is being developed by Puget Sound Energy (PSE) and interconnected to the Puget Sound Energy system at the Starwood 115 kV point of interconnection. It entered the PSE interconnection queue on August 25, 2021, with a proposed commercial operation date of July 1, 2024.
The project's interconnection status is currently listed as "suspended," and its interconnection agreement (IA) status is also "suspended."
Generated from interconnection queue and public data sources
Realization risk through commissioning — schedule slippage, construction cost overrun, and COD probability vs the stated window. The diligence view that determines whether the project comes online when promised. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
WA
County
King
Grid Region
Mountain West
Market
—
Developer
—
Utility
Puget Sound Energy
Entity
PSE
Service Type
NRIS
Point of Interconnection
Starwood 115 kV
Data Source
LBNL
Composite operating-phase risk view — what this asset's risk profile will look like once it commissions. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.
See the full risk decomposition + scenarios for this project.
Forward generation outlook — first-year production estimate and 10-year P50 trajectory, with curtailment risk decomposed by congestion zone and ranges (P10/P50/P90) across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this project.
Forward revenue, first-year DSCR, and construction cost overrun exposure — what determines whether the deal clears its covenants once online. Projected across price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- 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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Ask about Project PSE-121Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
