Sandwich
Named in 4 PJM planning documents for 3 projects, from September 19, 2025 to December 12, 2025.
Existingdescribed as
COMEDzone
138 kV, 138kVkV as printed
4mentions
Also printed as: Sandwich Substation
PJM interconnection queue
A PJM queue substation page has the same name: Sandwich (IL) — 5 queue requests filed, 0 active.
Same name and transmission owner. Matched on name and transmission owner: the utility that presented this substation in PJM planning materials is the transmission owner recorded on the queue filings at a substation of the same name. Not verified as the same facility.
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 |
|---|---|---|---|---|---|
| Mendota-Sandwich 138 kV b4025.1 |
Not printed | $171.88 M | 4/15/2030 | Not printed | 2025-12-12 SRRTEP Western |
| Mendota-Sandwich 138 kV | Not printed | $171.88 M | 4/15/2030 | Not printed | 2025-11-14 SRRTEP Western |
| Sandwich Substation ComEd-2025-019 |
Conceptual | $33.8 M | 12/31/2028 | Not printed | 2025-10-17 SRRTEP Western |
Every mention
| Date | Document | Project | What the document says about it |
|---|---|---|---|
| 2025-12-12 | SRRTEP Western Item 16 - SRRTEP West - Reliability Analysis Update p. 4 |
Mendota-Sandwich 138 kV | “Install 138 kV circuit breaker and associated equipment at Sandwich substation” 138 kV |
| 2025-11-14 | SRRTEP Western Item 01 - SRRTEP West - Reliability Analysis Update p. 4 |
Mendota-Sandwich 138 kV | “Install 138 kV circuit breaker and associated equipment at Sandwich
substation.” 138 kV |
| 2025-10-17 | SRRTEP Western Item 05 - ComEd Supplemental Projects p. 5 |
Sandwich Substation | “Sandwich is currently a “Line Tie Breaker Substation”” 138kV |
| 2025-09-19 | SRRTEP Western Item 04 - ComEd Supplemental Projects p. 3 |
Sandwich Substation | “Sandwich is currently a “Line Tie Breaker Substation”” 138kV |
* 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.