Battery storage project 99, King County

Battery storage project 99, King County is a 250 MW battery storage request suspended in the West interconnection queue, in King County, Washington, connecting to Puget Sound Energy.

Queue statusPaused / redesign

PlanningQueued Apr 2021 (current stage)
Consented (not yet reached)
Construction (not yet reached)
OperatingTarget Jun 2028 (not yet reached)
Closed (not yet reached)

Studies assess what grid upgrades the project would need and who pays for them. A signed interconnection agreement is the main step before construction.

Request details

Queue ID: 99
Grid region: West (non-ISO utilities)
Utility / transmission owner: Puget Sound Energy
Connection point (POI): Talbot Hill 230 kV Substation
Location: King County, Washington
Technology: Battery: 250 MW
Total requested: 250 MW
Service type: Network resource (NRIS)
Study phase: Suspended LGIA
Queue status: Suspended
Entered queue: 15 April 2021
Proposed online date: June 2028

Location

Marker shows the centre of King County; the queue data does not give exact sites.

Power plants in Washington · Transmission lines in Washington

Other requests in King County

Source: Lawrence Berkeley National Laboratory, Queued Up, data through end of 2025, compiled from ISO/RTO and utility queues. Check the grid operator's own queue for the latest status. Report a problem