Tollway
Named in 4 PJM planning documents for 3 projects, from September 9, 2025 to July 7, 2026.
Existingdescribed as
COMEDzone
138 kV, 345kVkV as printed
4mentions
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 Hoffman Estates ComEd-2024-005 · s3578.1 |
Engineering | $3M | 12/31/26 | 324 MW | 2025-10-08 TEAC |
| Customer in Hoffman Estates ComEd-2024-016 |
Conceptual | $84.8M | 9/1/2028 | 612 MW | 2025-09-09 TEAC |
| 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 |
|---|---|---|---|
| 2026-09-08* | SRRTEP Western ComEd local plan submission of the supplemental projects for 2025 RTEP p. 3 |
Customer in Hoffman Estates | “from Tollway substation to the customer site” 138 kV |
| 2026-07-07 | TEAC Item 12 - ComEd Supplemental Projects p. 9 |
Customer in Grayslake | “Cut into existing 345kV Tollway - Libertyville line” 345kV |
| 2025-10-08 | TEAC Informational Only - ComEd Local Plan Submission of the Supplemental Projects for 2025 p. 3 |
Customer in Hoffman Estates | “At Tollway, replace 138 kV BT 2-3 CB with two 138kV BT CBs” 138 kV |
| 2025-09-09 | TEAC Item 12 - ComEd Supplemental Projects p. 18 |
Customer in Hoffman Estates | “Cut into existing 345kV Libertyville – Tollway line” 345kV |
* 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.