PJM · Maryland
Calvert Cliffs Units 1 and 2 filed three times, and all three were built.
Calvert Cliffs 500 kV
Five interconnection requests since 2003: 3 reached commercial operation, 2 withdrew.
- Built
- 3
- Withdrawn
- 2
- Still in queue
- 0
The queue record
Every interconnection request the dataset records at this point of interconnection, in filing order.
| Requested | Project | Technology | Capacity | Outcome |
|---|---|---|---|---|
| 2003-07-30 | (unnamed) | Nuclear | 35 MW | Withdrawn2005-08-20 |
| 2009-07-29 | (unnamed) | Nuclear | 1640 MW | Withdrawn2012-09-06 |
| 2016-06-09 | Calvert Cliffs Units 1 and 2 (f/k/a PJM Queue M04) | Nuclear | 19.2 MW | Built2023-02-07 · 6.7 yrs |
| 2017-01-04 | Calvert Cliffs Units 1 and 2 (f/k/a PJM Queue M04) | Nuclear | 11.1 MW | Built2023-02-07 · 6.1 yrs |
| 2018-04-02 | Calvert Cliffs Units 1 and 2 (f/k/a PJM Queue M04) | Nuclear | 28.1 MW | Built2023-02-07 · 4.9 yrs |
What the record shows
- Two of the five requests at this node withdrew, and 1,675 MW of the 1,733 MW filed here never reached operation.
- Completions here took between 4.9 and 6.7 years from request to commercial operation.
- The largest request ever filed here, 1640 MW, withdrew 3.1 years after filing.
- Calvert Cliffs Units 1 and 2 (f/k/a PJM Queue M04) appears three times in the queue at this node, filed between 2016 and 2018, of which three reached operation.
- No request at this node remains active, so its record is settled.
What a decision record would have to make explicit
- With five requests, nothing at this node generalises to another; it is a record, not a rate.
- The dataset records no withdrawal reasons, study costs or upgrade assignments, so those remain unknowns on this record.
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.