Middlesex
Named in 4 PJM planning documents for 3 projects, from October 8, 2024 to May 8, 2026.
Existingdescribed as
JCPLzone
230 kVkV as printed
4mentions
Also printed as: Middlesex 230 kV Switching Station · Middlesex substation
Projects naming this substation
Figures are from the most recent document naming each project, as printed. Each links to its page.
| Project | Status as printed | Cost estimate | In-service date | Customer load | As of |
|---|---|---|---|---|---|
| JCPL Transmission Zone: NJ SAA Baseline Project Cancelations b3737.27 |
Not printed | Not printed | 6/1/2029 | Not printed | 2026-05-08 TEAC |
| Middlesex 230 kV Switching Station s3261.1 |
Not printed | $8.85M FirstEnergy, $9.04M PSE&G | 12/31/2027 | Not printed | 2025-01-07 TEAC |
| Middlesex 230 kV Switching Station JCPL-2023-062 · s3261.1 |
Not printed | $8.85M | 6/1/2026 | Not printed | 2024-10-08 TEAC |
Changes between documents
Where two documents print different values for the same project. A large change in a cost estimate can reflect a need being combined with others into one solution, not only a re-estimate; read both pages.
| What changed | Printed values | Earlier | Later |
|---|---|---|---|
| Substations named | MIDDLESEX → BRIDGEWATER; GILLETTE; LAKE NELSON; MIDDLESEX | 2024-10-08 | Not reported |
Every mention
| Date | Document | Project | What the document says about it |
|---|---|---|---|
| 2026-09-08* | SRRTEP Mid-Atlantic JCPL local plan submission for 2024 RTEP p. 37 |
Middlesex 230 kV Switching Station | “Convert the existing Middlesex 230 kV Switching Station to a three (3) breaker ring bus” 230 kV |
| 2026-05-08 | TEAC Item 10 - Reliability Analysis Update p. 28 |
JCPL Transmission Zone: NJ SAA Baseline Project Cancelations | “Middlesex substation 230 kV – Replace the 2000A circuit switcher” 230 kV |
| 2025-01-07 | TEAC Item 06 - JCPL Supplemental Projects p. 4 |
Middlesex 230 kV Switching Station | “Convert the existing Middlesex 230 kV Switching Station to a three (3) breaker ring bus” 230 kV |
| 2024-10-08 | TEAC Informational Only - JCPL Local Plan submission of supplemental project 2024 p. 37 |
Middlesex 230 kV Switching Station | “Convert the existing Middlesex 230 kV Switching Station to a three (3) breaker ring bus.” 230 kV |
* A local-plan posting carries no meeting date; the date shown is when pjm.com last modified the file.
Before relying on any of this
- Names are machine-extracted from PDFs by a language model. Every exported name was checked to be printed in the PDF text; names read only from maps or diagrams are excluded.
- An entry is a name within a transmission zone, not a verified physical facility. The same name in two zones is two entries; spelling variants are merged only when they differ by punctuation, case or a generic suffix such as "Substation".
- role is "new" only where a cited document phrase describes the substation as new or describes constructing it, "existing" where a phrase describes work at it, otherwise "unknown".
- Costs, dates, statuses and loads are the documents' own printed values for the most recent document that names the substation. Each one shipped here is printed on its cited page ("verification": "exact" or "on-page"); values that failed that check are withheld and counted in figures_withheld_unverified. None has been reviewed by a person.
- Zone is the transmission owner whose deck presented the project. PJM-SYSTEM marks names from PJM's own reliability decks, which span zones.
- A printed customer load is the amount a document states for a request. It says nothing about the substation's capability.