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Battery storage · Contra Costa County, California
BLACK DIAMOND ES2
A 179 MW battery storage project in Contra Costa County, California. BLACK DIAMOND ES2 has work under way on site. No public record read so far names its builder.
The record
What the public record says about BLACK DIAMOND ES2, as of 23 Oct 2026.
| Stage | Under construction |
|---|---|
| Construction start | Q3 2022 permit on file |
| Size | 179 MW |
| Location | Contra Costa County, California (to about 10 km) |
| Developer | Not named in any record read |
| Grid operator | CAISO |
| Builder (EPC) | Not named yet |
| Trade subcontractors | in the app |
| People to call | in the app |
| Phase windows | in the app |
Every fact in the app links to the public record behind it, with how many records agree and whether it is confirmed, reported or an estimate. What the terms mean.
What happened
Each change dated by the scene or the document, newest first.
No change on record since Groundtrace started tracking it.
Who was named on it, and when, is in the app.
Also in Contra Costa County
| Project | Stage | Size |
|---|---|---|
| DELILAH ENERGY STORAGEBattery storage | Financed | 504 MW |
| ALLEGHENY ENERGY STORAGEBattery storage | Financed | 353 MW |
| HARMONY STORAGE 2Battery storage | Queued | 308 MW |
| SHERMAN ENERGY STORAGEBattery storage | Queued | 256 MW |
| BLACK DIAMOND ENERGY STORAGEBattery storage | Operating | 200 MW |
| Diablo Energy StorageBattery storage | Operating | 200 MW |
More
Questions
BLACK DIAMOND ES2, in short.
Where is BLACK DIAMOND ES2?
BLACK DIAMOND ES2 is a 179 MW battery storage project in Contra Costa County, California, in CAISO's interconnection queue. The public page places it to within about ten kilometres; the precise location is in the subscriber record.
When does construction start on BLACK DIAMOND ES2?
A construction permit on file dates the start of work to the third quarter of 2022.
Who is developing BLACK DIAMOND ES2?
No public record read so far names its developer.
Who is building BLACK DIAMOND ES2?
No public record read so far names a builder for BLACK DIAMOND ES2. Groundtrace leaves the field empty rather than guess, and fills it when a permit, a filing or the builder's own page names one.
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