Alberta · Pipeline · updated October 12, 2026
ATCO Yellowhead Mainline
A C$2.9B, 235 km, 1 Bcf/d gas pipeline feeding the Heartland broke ground in Sept 2026.
- Province
- Alberta
- Location
- Peers to Fort Saskatchewan
- Sector
- Pipeline
- Owner
- ATCO (Canadian Utilities)
- Status
- Final AUC approval July 2026; ground broken Sept 2026
- Next milestone
- Operational Q4 2027
- Disclosed cost
- C$2.9B (Alberta Major Projects) (source)
- Investment decision / approval
- AUC approval 2026-07
- Construction start
- 2026-09
- In service
- Q4 2027
- Other details
- 36-inch line plus a compressor station; about 2,000 direct construction jobs
Why it matters for contractors and suppliers
This is a one-season mainline build, so spreads, camps, compression and testing are all bought in 2026–27.
It also feeds gas to Heartland data-centre and petrochemical loads.
Want to know when ATCO Yellowhead Mainline moves? Status changes, contract awards and tender dates for every tracked project go to subscribers in the mid-month update, alongside the two monthly reports.
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Free vs full reports
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| Free Top 25 Projects one-pager | ✓ | ✓ |
| Both full monthly reports (21 pages in October 2026) | – | ✓ |
| Procurement packages and buyer and contractor contacts | – | ✓ |
| Bid calendar: tenders, awards and deadlines, exportable to Outlook or Google | – | ✓ |
| Project watchlist, highlighted in the mid-month update | – | ✓ |
| Mid-month update when tracked projects move | – | ✓ |
| Every past issue in your account | – | ✓ |
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Sources
Supplier registration: owner supplier page · Alberta public tenders. How we research: editorial standards.
Frequently asked
What is the status of ATCO Yellowhead Mainline?
As of October 12, 2026: Final AUC approval July 2026; ground broken Sept 2026. Next: Operational Q4 2027.
Who owns ATCO Yellowhead Mainline?
ATCO (Canadian Utilities).
How much does ATCO Yellowhead Mainline cost?
C$2.9B (Alberta Major Projects).
What is the timeline for ATCO Yellowhead Mainline?
Construction start: 2026-09; in service: q4 2027.
How do suppliers register for ATCO Yellowhead Mainline?
Through the owner's supplier page: https://yellowhead.atco.com/. Public-sector packages in Alberta are also posted on the provincial tender portal.