Columbia
Named in 4 PJM planning documents for 3 projects, from February 12, 2026 to October 6, 2026.
Existingdescribed as
PPLzone
230kV, 69kVkV as printed
7mentions
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 |
|---|---|---|---|---|---|
| Mausdale, PA PPL-2025-0030 |
Engineering | $3.6 M | 03/30/2028 | Not printed | 2026-10-06 TEAC |
| West Berwick, PA PPL-2026-0007 |
Conceptual | $0.1 M | 11/30/2028 | Not printed | 2026-10-06 TEAC |
| Natalie 500-230kV Substation PPL-2026-0029 |
Conceptual | $408 M | 12/30/2029 | 2,000 MW | 2026-09-08 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 |
|---|---|---|---|
| In-service date | 3/2028 → 03/30/2028 | 2025-12-11 | 2026-02-12 |
| Substations named | MAUSDALE → COLUMBIA; MAUSDALE; SUNBURY | 2025-12-11 | 2026-02-12 |
| Substations named | WEST BERWICK → COLUMBIA; GLEN BROOK; WEST BERWICK | 2026-01-15 | 2026-02-12 |
| In-service date | 06/2028 → 12/30/2029 | 2026-04-07 | 2026-09-08 |
Every mention
| Date | Document | Project | What the document says about it |
|---|---|---|---|
| 2026-10-06 | TEAC Informational Only - PPL Local Plan Submission of the Supplemental Projects for 2026 p. 33 |
Mausdale, PA | No role wording |
| 2026-10-06 | TEAC Informational Only - PPL Local Plan Submission of the Supplemental Projects for 2026 p. 51 |
West Berwick, PA | No role wording |
| 2026-09-17* | SRRTEP Mid-Atlantic PPL local plan submission for 2026 RTEP p. 33 |
Mausdale, PA | No role wording |
| 2026-09-17* | SRRTEP Mid-Atlantic PPL local plan submission for 2026 RTEP p. 51 |
West Berwick, PA | No role wording 69kV |
| 2026-09-08 | TEAC Item 07 - PPL Supplemental Projects p. 4 |
Natalie 500-230kV Substation | “Upgrade bus and bay conductor” 230kV |
| 2026-02-12 | SRRTEP Mid-Atlantic Item 05 - PPL Supplemental Projects p. 18 |
Mausdale, PA | “Columbia 69kV Substation” 69kV |
| 2026-02-12 | SRRTEP Mid-Atlantic Item 05 - PPL Supplemental Projects p. 22 |
West Berwick, PA | “Columbia 69kV Substation” 69kV |
* 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.