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CAISO · Arizona / California · Public-record retrospective

Delaney Substation 500 kV: interconnection queue history

Seven of ten requests withdrew; three are still in the queue.

GridVision AI ResearchUpdated

Ten interconnection requests since 2018: 7 withdrew and 3 remain active.

Built
0
Withdrawn
7
Still in queue
3

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
2018-04-16PITCHFORK ENERGYSolar + battery513.5 MWWithdrawn2019-03-08
2020-04-15PAPAGOSolar + battery307.188 MWWithdrawn2021-03-19
2020-04-15HARQUAHALA SUNRISESolar + battery308.926 MWStill in queue
2020-04-15ARIZONA A1Solar + battery2072.52 MWWithdrawn2021-05-03
2021-04-15HARQUAHALA SUNRISE 2Solar + battery169.2 MWStill in queue
2021-04-15HARQUAHALA FLATS 2Solar + battery410.76 MWStill in queue
2021-04-15PRIMROSE HYBRIDSolar + battery458.659 MWWithdrawn2021-08-12
2023-04-17SalomeSolar + battery320 MWWithdrawn2024-12-02
2023-04-17BelmontSolar + battery626 MWWithdrawn2024-12-02
2023-04-17Harquahala Sunrise 3Solar + battery1037 MWWithdrawn2024-12-02

What the record shows

  • 5,335 MW of the 6,224 MW filed here withdrew.
  • The largest request filed here, 2,073 MW (solar + battery), withdrew 1.0 years after filing.
  • Three requests were filed on 2023-04-17; all of them withdrew.
  • Three of the 7 withdrawals came within a year of filing.
  • The longest-standing active request here was filed on 2020-04-15.
  • The dataset records this point of interconnection under three spellings, which are combined here.

What a decision record would have to make explicit

  • None of the resolved requests at this node reached operation, and the public record does not say why.
  • Three 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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