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CAISO · California · Public-record retrospective

Mendota Substation 115 kV: interconnection queue history

1,231 MW filed. 60 MW built.

GridVision AI ResearchUpdated

Seventeen interconnection requests since 2010: 1 reached commercial operation, 12 withdrew, and 4 remain active.

Built
1
Withdrawn
12
Still in queue
4

The queue record

Every interconnection request the dataset records at this point of interconnection, in filing order.

Interconnection requests recorded at this point of interconnection, with request date, capacity and outcome.
RequestedProjectTechnologyCapacityOutcome
2010-02-01NORTH STAR SOLAR 1Solar60 MWBuilt2015-06-20 · 5.4 yrs
2011-03-31LIBERTY SOLARSolar0.1 MWWithdrawn2016-07-29
2011-03-31PATRIOT SOLAR ASolar20 MWWithdrawn2016-08-09
2011-03-31PATRIOT SOLAR BSolar20 MWWithdrawn2016-08-09
2011-03-31MENDOTA SOLAR ISolar75 MWWithdrawn2012-04-17
2011-03-31ADAME 1Solar118 MWWithdrawn2012-04-17
2014-04-30LITTLE BEAR SOLAR 1Solar + battery20 MWStill in queue
2014-04-30LITTLE BEAR SOLAR 2Solar + battery20 MWStill in queue
2015-04-30LITTLE BEAR 3Solar + battery20.44 MWStill in queue
2015-04-30CENTRAL VALLEYSolar60 MWWithdrawn2016-02-16
2015-04-30LITTLE BEAR 4Solar + battery103.09 MWStill in queue
2017-05-01CALIFORNIA BEAR 6Solar + battery22.41 MWWithdrawn2018-03-01
2017-05-01BRUIN SOLARSolar51.25 MWWithdrawn2018-03-01
2018-04-16PLACIDSolar + battery180 MWWithdrawn2019-03-06
2020-04-15ALBASolar + battery154.838 MWWithdrawn2021-04-12
2021-04-15WHITE RABBITBattery150 MWWithdrawn2025-04-09
2023-04-17Black HorseGas + battery156 MWWithdrawn2024-12-02

What the record shows

  • 1,008 MW of the 1,231 MW filed here withdrew, and 60 MW reached commercial operation.
  • The one request that reached operation took 5.4 years from request to commercial operation.
  • The largest request filed here, 180 MW (solar + battery), withdrew 0.9 years after filing.
  • Five requests were filed on 2011-03-31; all of them withdrew.
  • Five of the 12 withdrawals came within a year of filing.
  • By technology, the requests here were solar 8, solar + battery 7, battery 1, gas + battery 1.
  • The longest-standing active request here was filed on 2014-04-30.
  • The dataset records this point of interconnection under eight spellings, which are combined here.

What a decision record would have to make explicit

  • What separated the requests that reached operation from those that withdrew, such as study results, upgrade assignments or site conditions, is not in the public queue record, so a decision record here would have to carry it as an unknown.
  • Four requests are unresolved, so the outcome counts at this node can still change.
  • The dataset records outcomes and dates, not reasons, so no cause is attributed to any outcome here.

What this does and does not show

This is a reading of a public dataset, not a customer case study: no engagement, customer or client is involved. The dataset records outcomes — what was built, what withdrew, and when — but not why any project withdrew, so no cause is attributed here. Nothing on this page claims GridVision predicted, influenced or would have changed any outcome, and a pattern at one point of interconnection does not generalise to another.

Source: Lawrence Berkeley National Laboratory, Queued Up: 2026 Edition — project-level interconnection queue dataset. Interconnection requests through year-end 2025. Used under CC BY 4.0; attribution to Lawrence Berkeley National Laboratory and GridTracker.

Related points of interconnection

How the CAISO process works today: CAISO interconnection queue. Comparing candidate nodes for a project? Read how to choose a point of interconnection.

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