Keystone

Named in 1 PJM planning document for 1 project, on January 6, 2026.

Existingdescribed as

PENELECzone

500/230 kVkV as printed

1mentions

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
Keystone 500/230 kV No. 4 Transformer PN-2026-002	Not printed	Not printed	Not printed	Not printed	2026-01-06 TEAC

Date	Document	Project	What the document says about it
2026-01-06	TEAC Item 04 - Penelec Supplemental Projects p. 3	Keystone 500/230 kV No. 4 Transformer	“Keystone No. 4 500/230 kV Transformer is approximately 56 years old” 500/230 kV

* A local-plan posting carries no meeting date; the date shown is when pjm.com last modified the file.

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.