Natural Gas & Energy Infrastructure
Guardian 3 Expansion Project
Illinois and Wisconsin
Project overview
Guardian Pipeline is seeking FERC authorization for an Illinois-Wisconsin expansion that would add two 36-inch pipeline loops, new and modified compression, and a new meter station to provide about 536,903 dekatherms per day of incremental capacity.
- Scope
- Build approximately 42.6 miles of 36-inch Joliet Loop and 25.5 miles of 36-inch Sycamore Loop in Illinois; add compression at Joliet and Sycamore; build the electric-driven Eden Compressor Station and Sheboygan Meter Station and modify Bluff Creek facilities in Wisconsin.
- Project type
- Natural gas pipeline looping and compression expansion
- Reported investment / scope
- Approximately $890 million estimated total project cost
- Funding sources
- Not available
- Delivery method
- Not available
Organizations involved
- Owner / developer
- Guardian Pipeline, L.L.C.
- Developer
- Not available
- Engineering firm / architect
- Not available
- General contractor / construction manager
- Not available
- EPC contractor
- Not available
- Technology / equipment providers
- Not available
- Financial sponsor
- Not available
- Other recorded participants
- Guardian Pipeline, L.L.C.; DT Midstream; Federal Energy Regulatory Commission; Illinois Environmental Protection Agency
Business opportunities
Not verified
- Current procurement record
- Not available
- Upcoming procurement
- Not available
- Contract / package value
- Not available
- Supplier / subcontractor opportunities
- Not available
- Workforce requirements
- Not available
Check official project / procurement portal ↗
A project listing is not an open solicitation. Check the source for eligibility, current status, closing time and addenda.
Timeline & key dates
- Expected procurement
- FERC application filed July 1, 2026
- Construction start
- Not available
- Estimated completion
- Not available
- Dated milestones
- 2026-07-01 — Guardian filed its FERC certificate application.
2026-07-17 — FERC published notice of the application. - Permitting
- FERC docket CP26-548-000 is under review. Illinois Clean Water Act Section 401 certification is required.
- Recent project updates
- 2026-07-17 — FERC opened the federal review record for the Guardian 3 Expansion Project.
- Challenges / risks
- Not available
Related intelligence
No verified record associations have been entered for this project yet.
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Additional project record
Sector: Natural Gas & Energy Infrastructure
Stage: Permitting
Guardian Pipeline is seeking FERC authorization for an Illinois-Wisconsin expansion that would add two 36-inch pipeline loops, new and modified compression, and a new meter station to provide about 536,903 dekatherms per day of incremental capacity.
Latest verified milestone
FERC’s July 17 notice confirms the filed application, proposed facilities, estimated cost and environmental-review path under docket CP26-548-000.
View the official project source
Project record reviewed October 1, 2026. Dates and status reflect the cited public source and may change.
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