Canadian Mainline Winter 2025/2026 Open Season for STFT

July 22, 2025

TransCanada's Canadian Mainline is currently posting Short Term Firm Transportation ("STFT") in this Short Term Capacity Open Season (the "Open Season") for monthly service in the Winter season (November 1, 2025 to March 31, 2026). TransCanada will be accepting bids in the Short Term Firm Open Season until Thursday, July 24, 2025 at 8:00 a.m. MT (Calgary time).  

TransCanada continues to anticipate offering an Existing Capacity Open Season (the "ECOS") in July of 2025 with Firm Transportation capacity having a December 1, 2025 start date. Additionally, TransCanada is planning a combined partial Winter 2025/26 and partial Summer 2026 STFT offering with available capacity starting December 2025. A bulletin will be posted for the ECOS and the STFT capacity offerings when available. 

STFT Bid floors are shown at Short Term Capacity: Bid Floors. Please note, the Mainline Rate Rider is not applicable for STFT. The capacity available is located in the tables below.

 

Table 1: Available Short Term Capacity (GJ/d)(1)(2) 

Paths not listed in Table 1 may have capacity available, please contact your Marketing Representative. Bid floors can be found at Short Term Capacity: Bid Floors.

Posted System Segments for STFT November 2025 (GJ/d) December 2025 (GJ/d) January 2026 (GJ/d) February 2026 (GJ/d) March 2026 (GJ/d)

Empress (3)(4) to (Domestic)

          

South Saskatchewan Delivery Area (SSDA)

0

 343,289 343,289 343,289 343,289

Manitoba Delivery Area (MDA)

0

 343,289 343,289 343,289 343,289

Western Delivery Area (WDA)

0

 73,760 73,760 73,760 73,760

Northern Delivery Area (NDA) and North Bay Junction

0

 73,760 73,760 73,760 73,760

Central Delivery Area (CDA)(4)

0

 28,000 28,000 28,000 28,000

Eastern Delivery Area (EDA)(6)

0

 23,000 23,000 23,000 23,000

Eastern Delivery Area (Energir EDA)

0

 0 0 0 0

Southwest Delivery Area (SWDA)

0

 0 0 0 0

 

          

Empress(3)(4) to (Export)

          
Emerson 1 0 343,289 343,289 343,289 343,289
Emerson 2 0 343,289 343,289 343,289 343,289
Iroquois 0 23,000 23,000 23,000 23,000
Cornwall 0 23,000 23,000 23,000 23,000
Napierville 0 23,000 23,000 23,000 23,000
Philipsburg 0 0 0 0 0
East Hereford 0 0 0 0 0

 

Table 2: Available Short Term Capacity (GJ/d)(1)(2)

Paths not listed in Table 2 may have capacity available, please contact your Marketing Representative. Bid floors can be found at Short Term Capacity: Bid Floors.

Posted System Segments for STFT

 November 2025 (GJ/d) December 2025 (GJ/d) January 2026 (GJ/d) February 2026 (GJ/d) March 2026 (GJ/d)

Dawn to

          
Kirkwall 0 0 0 0 0

 

          

Parkway to

          
Southwest Delivery Area (SWDA) 0 0 0 0 0
Points East of Parkway Maple Corridor 0 0 0 0 0

 

          

Sault Ste. Marie to

          
Union SSMDA 0 0 0 0 0
           

Kirkwall to

          
Union CDA  84,058 84,058 84,058 84,058 84,058
Union SWDA 0 0 0 0 0

 

Table 3: Available Short Term Capacity (GJ/d)(1)(2)

Paths not listed in Table 3 may have capacity available, please contact your Marketing Representative. Bid floors can be found at Short Term Capacity: Bid Floors.

Posted System Segments for STFT

 November 2025 (GJ/d) December 2025 (GJ/d) January 2026 (GJ/d) February 2026 (GJ/d) March 2026 (GJ/d)

Niagara Falls to

          
Kirkwall(7) 0 0 0 0 0
           

Chippawa to

          

Kirkwall(7)

 0 0 0 0 0

Table 4: Available Short Term Capacity (GJ/d)(1)(2)

This is the available capacity at the Iroquois Receipt meter station. Capacities available to downstream points are subject to downstream segment capacities.  Paths not listed in Table 4 may have capacity available, please contact your Marketing Representative. Bid floors can be found at Short Term Capacity: Bid Floors.

Posted System Segments for STFT

 November 2025 (GJ/d) December 2025 (GJ/d) January 2026 (GJ/d) February 2026 (GJ/d) March 2026 (GJ/d)

Iroquois

          

Enbridge EDA, Union EDA and Cornwall

 19,567 19,567 19,567 19,567 19,567
Energir EDA and East Hereford 0 0 0 0 0

 

1 The paths above contain shared capacity, and as such, the capacity available for one path may be impacted by bids to another path sharing the same capacity.
2 TransCanada is not accepting bids from export points unless otherwise listed in the tables above
3 Customers and prospective customers should be aware that TransCanada has posted firm capacity from Empress that may be in excess of the upstream delivery capacity on Nova Gas Transmission Ltd. (NGTL).  It is the responsibility of customers to ensure upstream capacity is available.
4  Bayhurst 1, Herbert, Richmound, Shackleton, Success, Suffield 2, and Welwyn are also valid receipt points for the delivery points listed in Table 1, subject to metering capacity
5 Capacity available to Union NCDA, Enbridge CDA, Union Parkway Belt, and Union ECDA only.
6 Capacity available to Enbridge EDA, Union EDA, and KPUC only.
7 Niagara to Kirkwall and Chippawa to Kirkwall capacities are not additive.

Open Season & Bidding Procedure Highlights

 

  • Bids must be received by TransCanada no later than 8:00 a.m. MT (Calgary time) Thursday July 24, 2025.
  • Term (monthly blocks): November 1, 2025 to March 31, 2026. Minimum one (1) month term.
  • Bids must be full month increments.
  • System Segment Capacity:
    • Some posted segments share common capacity.  A successful bid on one system segment may reduce the capacity on another system segment.
    • Any bids that pertain to common capacity will be evaluated together for allocation purposes.
    • Each capacity segment requested must be on an individual bid form
  • Conditional Bidding: STFT bids can be conditioned on another STFT bid
    • If an STFT bid is conditional on other STFT bids, and any of these STFT bids require a reduction to the maximum daily quantity, the maximum daily quantity for the other STFT bid will be reduced by the same percentage.
    • Please submit each set of conditional bids in a separate fax, to provide clarity on which bids are related.
  • Minimum Acceptable Quantity: May be specified by bidder in the event that prorating capacity is necessary
  • There are no Diversions, Alternate Receipt Points, or Renewal Rights with any STFT service
  • Transportation sales in the Daily Existing Capacity Open Season will affect the available capacity in this STFT Open Season
  •  Please note that the STFT bid floor percentage is applied only to the applicable Daily Demand Toll for FT service and not applied to abandonment surcharge or pressure charge.

 

How to Bid

Service applicants must submit a binding Short Term Transportation Contract, Exhibit "A" Addendum, Paper Version or Electronic Version, to TransCanada's Mainline Contracting Department by email at mainline_contracting@tcenergy.com or by fax at 1.403.920.2309 and must be received by 8:00 a.m. MT (Calgary time) Thursday July 24, 2025.

 

Questions

If you have any questions, please contact your Marketing Representative.

 

Calgary

 

Tyler Cook

Phone: 1.403.920.6021

Email: tyler_cook@tcenergy.com

 

Kevin D'Souza

Phone: 1.403.920.7915

Email: kevin_dsouza@tcenergy.com

 

Kelsey Johannson

Phone: 1.403.920.5956

Email: kelsey_johannson@tcenergy.com

 

Vanessa Swick

Phone: 1.403.920.6764

Email: vanessa_swick@tcenergy.com

 

Goran Miljevic

Phone: 1.403.920.5569

Email: goran_miljevic@tcenergy.com

 

David Beekhuizen

Phone: 1.403.920.6979

Email: david_beekhuizen@tcenergy.com

 

Toronto

 

Amelia Cheung

Phone: 1.416.869.2115

Email: amelia_cheung@tcenergy.com

 

Rory Black

Phone: 1.416.869.2159

Email: rory_black@tcenergy.com

 

Chelsea Medcalfe

Phone: 1.416.869.2103

Email: chelsea_medcalfe@tcenergy.com

 

Lisa Jamieson

Phone: 1.416.869.2171

Email: lisa_jamieson@tcenergy.com

 

Tim Stringer

Phone: 1.416.869.2177

Email: tim_stringer@tcenergy.com