Upper Merion
Named in 5 PJM planning documents for 2 projects, from October 8, 2024 to October 6, 2026.
Existingdescribed as
PECOzone
230 kV, 230kVkV as printed
5mentions
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 |
|---|---|---|---|---|---|
| 220-69 Plymouth Meeting – Upper Merion 230 kV Line Rebuild PE-2023-010 · s3186.1 |
Engineering | $29.2M | 12/31/25 | Not printed | 2024-10-08 TEAC |
| New Business Customer PE-2024-008 · s3730.1 (Phase 1), s3730.2 (Phase 2) |
Conceptual | $7M | 9/30/26 (Phase 1), 6/30/28 (Phase 2) | 290MW | 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 |
|---|---|---|---|
| In-service date | 12/31/2026 (Phase 1), 12/31/2027 (Phase 2) → 9/30/26 (Phase 1), 6/30/28 (Phase 2) | 2025-03-04 | 2026-10-06 |
Every mention
| Date | Document | Project | What the document says about it |
|---|---|---|---|
| 2026-10-06 | TEAC Informational Only - PECO Local Plan Submission of Supplemental Projects for 2026 p. 3 |
New Business Customer | No role wording 230kV |
| 2026-10-01* | SRRTEP Mid-Atlantic PECO local plan submission for 2026 RTEP p. 3 |
New Business Customer | No role wording 230kV |
| 2026-09-08* | SRRTEP Mid-Atlantic PECO local plan submission for 2024 RTEP p. 5 |
220-69 Plymouth Meeting – Upper Merion 230 kV Line Rebuild | “Replace various substation equipment at Plymouth Meeting and Upper Merion substations” 230 kV |
| 2025-03-04 | TEAC Item 10 - PECO Supplemental Projects p. 6 |
New Business Customer | No role wording 230kV |
| 2024-10-08 | TEAC Informational Only - PECO Local Plan submission of supplemental project 2024 p. 4 |
220-69 Plymouth Meeting – Upper Merion 230 kV Line Rebuild | “Replace various substation equipment at Plymouth Meeting and Upper Merion substations” 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.