Greystone
Named in 7 PJM planning documents for 3 projects, from October 8, 2024 to October 6, 2026.
Existingdescribed as
JCPLzone
230 kV, 230-34.5 kV, 34.5 kVkV as printed
7mentions
Also printed as: Greystone 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 M-3 Process Whippany, NJ/Montville, NJ/Greystone, NJ JCPL-2019-024 · s3609.1 |
Not printed | $20.1 M | 06/11/2027 | Not printed | 2025-10-08 TEAC |
| Greystone – Whippany 230 kV Misoperation Relays JCPL-2023-045 · s3254.1 |
Not printed | $2.75M | 12/31/2024 | Not printed | 2024-10-08 TEAC |
| Greystone 230-34.5 kV Substation, NJ JCPL-2026-045 |
Conceptual | $9.71 M | 12/15/2029 | Not printed | 2026-10-06 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 |
|---|---|---|---|
| Cost estimate | $40.2 M → $20.1 M | 2025-03-13 | 2025-10-08 |
| Substations named | GREYSTONE; WHIPPANY SUBSTATIONS → GREYSTONE; WHIPPANY | 2024-10-08 | Not reported |
| Substations named | CHILCOTT; DENVILLE; FOLL HILL; GREYSTONE; WEST DENVILLE → CHILCOTT; DENVILLE; FOLL HILL; GREYSTONE; MONTVILLE; MORRISTOWN; ROCKAWAY; WEST DENVILLE | 2026-08-04 | 2026-10-06 |
Every mention
| Date | Document | Project | What the document says about it |
|---|---|---|---|
| 2026-10-06 | TEAC Item 08 - JCPL Supplemental Projects - Presentation p. 5 |
Greystone 230-34.5 kV Substation, NJ | “At Greystone Substation:
§ Replace 34.5 kV breakers” 34.5 kV |
| 2026-09-08* | SRRTEP Mid-Atlantic JCPL local plan submission for 2025 RTEP p. 3 |
JCPL Transmission Zone M-3 Process Whippany, NJ/Montville, NJ/Greystone, NJ | “Replace relaying and terminal equipment at Greystone, Whippany, and Morristown substations.” |
| 2026-09-08* | SRRTEP Mid-Atlantic JCPL local plan submission for 2024 RTEP p. 24 |
Greystone – Whippany 230 kV Misoperation Relays | “Replace relaying and line trap at Greystone and Whippany substations” 230 kV |
| 2026-08-04 | TEAC Item 05 - JCPL Supplemental Projects p. 4 |
Greystone 230-34.5 kV Substation, NJ | “The existing Greystone 34.5 kV breakers B756, B37, B39, BK1B, L38, M741A, M741B, BK2A, and G70 are 29 years old” 230-34.5 kV |
| 2025-10-08 | TEAC Informational Only - JCPL Local Plan Submission of the Supplemental Projects for 2025 p. 3 |
JCPL Transmission Zone M-3 Process Whippany, NJ/Montville, NJ/Greystone, NJ | “Replace relaying and terminal equipment at Greystone” 34.5 kV |
| 2025-03-13 | SRRTEP Mid-Atlantic Item 05 - JCPL Supplemental Projects p. 8 |
JCPL Transmission Zone M-3 Process Whippany, NJ/Montville, NJ/Greystone, NJ | “Replace relaying and terminal equipment at Greystone, Whippany, and Morristown substations” 34.5 kV |
| 2024-10-08 | TEAC Informational Only - JCPL Local Plan submission of supplemental project 2024 p. 24 |
Greystone – Whippany 230 kV Misoperation Relays | “Replace relaying and line trap at Greystone and Whippany substations.” |
* 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.