Interconnection queue › California › Contra Costa County › Storage
Snapshot of 2026-08-06 · 28 projects
28 storage projects are in the interconnection queue in Contra Costa County, California, totalling 5,219 MW across the 28 that publish a capacity.
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| ISO | Projects | Capacity |
|---|---|---|
| CAISO | 28 | 5,219 MW |
| Fuel | Projects | Capacity |
|---|---|---|
| Battery | 28 | 5,219 MW |
| Status | Projects |
|---|---|
| WITHDRAWN | 22 |
| ACTIVE | 5 |
| COMPLETED | 1 |
The 12 highest-capacity rows in this page's exact scope, ordered by the capacity the ISO published. Projects without a published capacity are not ranked here and remain included in the totals above.
| Project | ISO | MW | Status | Queue date | Proposed operation |
|---|---|---|---|---|---|
| STEEL CITY ENERGY STORAGE | CAISO | 650 | WITHDRAWN | 2019-04-15 | not published |
| COMMANDER ENERGY STORAGE | CAISO | 500 | WITHDRAWN | 2021-04-15 | not published |
| DELILAH ENERGY STORAGE | CAISO | 500 | ACTIVE | 2021-04-15 | not published |
| ALLEGHENY ENERGY STORAGE | CAISO | 325 | ACTIVE | 2021-04-15 | not published |
| HARMONY STORAGE 2 | CAISO | 300 | ACTIVE | 2021-04-15 | not published |
| EPPS STORAGE | CAISO | 300 | WITHDRAWN | 2021-04-15 | not published |
| SHERMAN ENERGY STORAGE | CAISO | 250 | ACTIVE | 2021-04-15 | not published |
| STEEL CITY BATTERY STORAGE | CAISO | 220 | WITHDRAWN | 2020-04-15 | not published |
| STONEMAN | CAISO | 220 | WITHDRAWN | 2021-04-15 | not published |
| BLACK DIAMOND ENERGY STORAGE | CAISO | 200 | COMPLETED | 2015-04-30 | not published |
| BLACK DIAMOND ENERGY STORAGE 2 | CAISO | 200 | WITHDRAWN | 2018-04-16 | not published |
| LANYARD ENERGY STORAGE | CAISO | 200 | WITHDRAWN | 2021-04-15 | not published |
| ISO | We last read | Source last changed | Source |
|---|---|---|---|
| CAISO | 2026-08-06 | 2026-08-06 | source file |
Compiled from each ISO's own published interconnection queue report. Queue position is not a permit, a contract, or a guarantee that a project will be built; most projects in every queue are eventually withdrawn. Figures are reproduced as published, are provided for informational purposes only, and carry no warranty of accuracy or completeness. Always verify against the ISO's own report before relying on any figure.