Sienna Solar Farm

Sienna Solar Farm is a 400 MW solar + storage request with a signed interconnection agreement in the CAISO interconnection queue, in San Bernardino County, California, connecting to SCE.

Queue statusConsented

PlanningQueued Apr 2015 (completed)
ConsentedNov 2017 (current stage)
Construction (not yet reached)
OperatingTarget Jan 2027 (not yet reached)
Closed (not yet reached)

Request details

Queue ID: 1207
Grid region: CAISO (California)
Utility / transmission owner: SCE
Connection point (POI): Calcite Substation 230kV
Location: San Bernardino County, California
Technology: Solar: 200 MW · Battery: 200 MW
Total requested: 400 MW
Service type: Network resource (NRIS)
Study phase: Executed
Queue status: Active
Entered queue: 30 April 2015
Agreement signed: 7 November 2017
Proposed online date: January 2027

Location

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

Power plants in California · Transmission lines in California

Other requests in San Bernardino 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