Bear Mountains Pumped Storage
500 MW storage in Calaveras, CA · In queue since April 2023 · Proposed COD April 2028
500 MW
Capacity
1
Components
Battery
3y 1m
In Queue
Not Started
IA Status
COD target: 2028
Total Duration
5 years
Interconnection request submitted to ISO/RTO
CAISO uses cluster studies where projects are batched annually and studied together.
Typical: 36–48 months (IR to IA)
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2028-04-01
Bear Mountains Pumped Storage is a proposed 500 MW battery storage project located in Calaveras County, California. The project is in the California Independent System Operator (CAISO) interconnection queue as entry CAISO-55013, with a queue entry date of April 17, 2023, and a proposed commercial operation date of April 1, 2028. The project's interconnection agreement (IA) status is listed as "Not Started."
The project, which would interconnect to the PG&E grid at the BELLOTA 230 kV point of interconnection, has been mentioned in recent news coverage.
Generated from interconnection queue and public data sources
State
CA
County
Calaveras
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
PGAE
Entity
CAISO
Service Type
—
Point of Interconnection
BELLOTA 230 kV
Data Source
LBNL
- ISO / RTO
- CAISO
- Trading Hub
- TH_NP15_GEN-APND
- Hub Confidence
- MEDIUM
- POI Substation
- Bellota Substation
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.
Last updated 2026-03-14
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