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BATTERY STORAGE · CAISOMallard Energy Storage Project
Mallard Energy Storage Project is a 90.0 MW battery storage request withdrawn in the CAISO interconnection queue, in Contra Costa County, California, connecting to PGAE.
Queue statusWithdrawn / abandoned
- PlanningQueued May 2017 (completed)
- Withdrawn / abandonedJun 2017 (project stopped here)
- Consented (not reached)
- Construction (not reached)
- Operating (not reached)
- Closed (not reached)
Request details
- Queue ID
- 1386
- Grid region
- CAISO (California)
- Utility / transmission owner
- PGAE
- Connection point (POI)
- Pittsburg Switchyard 230kV
- Location
- Contra Costa County, California
- Technology
- Battery: 90.0 MW
- Total requested
- 90.0 MW
- Service type
- Network resource (NRIS)
- Study phase
- Feasibility Study
- Queue status
- Withdrawn
- Entered queue
- 1 May 2017
- Proposed online date
- June 2021
- Withdrawn
- June 2017
Location
Marker shows the centre of Contra Costa County; the queue data does not give exact sites.
Power plants in California · Transmission lines in California
Other requests in Contra Costa County
- Steel City Battery StorageBattery storage · 675 MW · agreement signed
- Delilah Energy StorageBattery storage · 504 MW · agreement signed
- Allegheny Energy StorageBattery storage · 353 MW · agreement signed
- Black Diamond ES2Battery storage · 179 MW · agreement signed
- Harmony Storage 2Battery storage · 308 MW · in study
- Sherman Energy StorageBattery storage · 256 MW · in study
- Gateway Generating Facility (Fka Contra Costa Power Plant Project)Gas · 590 MW · built
- Black Diamond Energy StorageBattery storage · 200 MW · built
- Marsh Landing Generation Station - Simple Cycle UnitsGas · 100 MW · built
- Los Medanos Energy CenterGas · 72.0 MW · built
- Buena Vista RepowerOnshore wind · 37.5 MW · built
- Columbia Solar Energy 2 Fka Columbia Solar Energy IISolar · 20.0 MW · built
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