Grayslake
Named in 2 PJM planning documents for 1 project, from March 10, 2026 to July 7, 2026.
Newdescribed as
COMEDzone
345 kVkV as printed
2mentions
Described as new: “new Grayslake substation” — source, page 7
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 |
|---|---|---|---|---|---|
| Customer in Grayslake ComEd-2025-005 |
Conceptual | $248.8M | 6/1/2027 (Phase 1), 6/1/2029 (Phase 2), 6/1/2030 (Phase 3), 6/1/2029 (138KV System Reinforcement), 6/1/2030 (345KV Auto, 345KV Silverlake-Grayslake, 345KV Wayne-Tollway), 6/1/2031 (345KV Tollway-Grayslake) | 1,550 MW | 2026-07-07 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 | $174.8M → $248.8M | 2026-03-10 | 2026-07-07 |
| In-service date | 6/30/2027 (Phase 1), 6/30/2029 (Phase 2), 6/30/2030 (Phase 3), 6/1/2029 (System Reinforcement) → 6/1/2027 (Phase 1), 6/1/2029 (Phase 2), 6/1/2030 (Phase 3), 6/1/2029 (138KV System Reinforcement), 6/1/2030 (345KV Auto, 345KV Silverlake-Grayslake, 345KV Wayne-Tollway), 6/1/2031 (345KV Tollway-Grayslake) | 2026-03-10 | 2026-07-07 |
| Substations named | BEVERLY ROAD; GRAYSLAKE; HANOVER TAP; LIBERTYVILLE; SILVER LAKE; SPAULDING → GRAYSLAKE; HANOVER TAP BLUE; HANOVER TAP RED; LIBERTYVILLE; SILVER LAKE; SPAULDING; TOLLWAY; WAYNE | 2026-03-10 | 2026-07-07 |
Every mention
| Date | Document | Project | What the document says about it |
|---|---|---|---|
| 2026-07-07 | TEAC Item 12 - ComEd Supplemental Projects p. 9 |
Customer in Grayslake | “new Grayslake substation” 345 kV |
| 2026-03-10 | TEAC Item 08 - ComEd Supplemental Projects p. 7 |
Customer in Grayslake | “new Grayslake substation” 345 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.