EventAction
Enbridge takes its final investment decision on Mainline Optimization Phase 1 (+150,000 b/d) and a Flanagan South expansion (+100,000 b/d), US$1.4B
Capacity is expected in 2027, carrying Canadian heavy oil to US Midwest and Gulf Coast refiners. The Flanagan South expansion (full path Edmonton to Houston) is backed by long-term take-or-pay contracts, and most existing Flanagan South shippers extended their full-path contracts into the next decade (Enbridge). Enbridge did not name the shippers: these are pipeline transport contracts, not contracts to sell oil to US buyers. The Flanagan South addition is downstream of the Mainline, so the new capacity out of Canada is the 150,000 b/d (EnergyNow).
- Date
- Kind
- Investment decision
- Where
- Canada
- Evidence
- Action: Something was done: a law switched on, a tariff imposed, money committed. How evidence is weighed
- Who
- Enbridge (acted)
Sources
- Enbridge, “Enbridge Adding Canadian Egress to Key U.S. Refining Markets, Enhancing North American Energy Security” (external site), . source record
- Pipeline & Gas Journal, “Enbridge approves $1.4 billion Mainline expansion to boost Canadian oil flows to US refiners” (external site), . source record
- EnergyNow, “Canada's next oil export wave: a project-by-project look at nearly three million barrels a day of potential pipeline capacity” (external site), . source record
Projects
Claims that rest on this event
- On the current course, intended or not, both countries win from Canada's resource build-out. The US gets more supply, and the new southbound capacity arrives first, from 2027. Canada gets a bigger resource base and the capacity to sell elsewhere, which shifts bargaining power toward it.
Firm southbound oil capacity in service 2027: the US side of the win.
- We put 'faster, and more volume reaches the US' (this outcome or a stronger one) at about 85%, the figure from the journal's volume model, counting oil, gas, power, uranium, potash and metals: about 89% if Canada gets a full aluminum exemption, about 76% if the 50% aluminum tariff lasts. It is checked in 2034 against 2024, and counts only if the yearly value reaching the US, at fixed prices, is more than about US$4 billion above 2024, about 3% of that year's total, so that ordinary year-to-year swings don't count; electricity is compared at normal water levels in both years. The southbound volume is largely committed already: an oil pipeline expansion with a final investment decision and new uranium mines.
The only southbound oil addition with a final investment decision that we found (+0.15 mb/d).
- Planned new oil pipeline capacity to the US adds up to about 730,000 barrels a day. Only 150,000 of it (Enbridge Mainline Phase 1, due in 2027) has a final investment decision. Most of the rest is South Bow's Prairie Connector (about 550,000 a day, 465,000 of it under 20-year shipper contracts, decision targeted for mid-2027, service around 2029). Enbridge postponed its Phase 2 (another 250,000 a day) on July 31, 2026, because producers would not commit.
The 0.15 mb/d that is firm.
- The long-term oil contracts are pipeline shipping commitments that Canadian producers pay for whether or not they use the space, not sales contracts with US buyers. Only Enbridge Mainline Phase 1 has a final investment decision; South Bow's Prairie Connector has 20-year shipper commitments but no decision yet, and producers would not commit to Enbridge's Phase 2.
Take-or-pay transport contracts, shippers undisclosed.
- What the build-out costs the US is leverage, not supply. US leverage rested on Canada having few other buyers: in 2025 about 90% of Canadian crude exports by volume went to the US, the coast took 12.5% of oil export pipeline capacity, and LNG exports had barely started. The loss comes late: new US-bound oil capacity arrives first (2027-29), while most of the capacity to sell elsewhere comes around 2034.
Southbound additions arrive first.
- The build-out only makes sense if the builders expect continued access to the US market: C-39's rail-competition clause for the Prairies takes effect only 'when there is a reliable trading relationship with the United States', and the firm new oil capacity runs south.
Firm capacity is southbound.
- Output is split into projects that don't need the new fast-track laws and projects that depend on them. Only the second group can say anything about the effect of the tariffs, and neither says anything about Washington's intent.
A project that needs no fast-track law, decided during the tariff period.
- On the current course, intended or not, Canada's resource build-out pays for both countries; the trade war doesn't. The US gets more supply, and the new southbound capacity arrives first, from 2027: it gets more supply either way; counted as income, the build-out pays it a little, but the trade war costs it more, so it comes out ahead in 2034 only if nearly all of today's tariff damage is gone. Canada gets a bigger resource base and the capacity to sell elsewhere, which shifts bargaining power toward it. By 2034, Canada comes out ahead unless most of today's tariffs are still in place; but the decade as a whole leaves it behind, and the longer the tariffs last, the less of it comes back.
Firm southbound oil capacity in service 2027: the US side of the win.
How it bears on the outcome
| Explanation | Fit | Why |
|---|---|---|
| O0 No meaningful speed-up | Against weak | A US$1.4B investment decision adding 150,000 b/d of export capacity after the pressure began is awkward for no speed-up, though it is an optimization of an existing system. |
| O1 Faster, but the extra output goes mostly elsewhere | Against moderate | New capacity carrying Canadian heavy oil to US Midwest and Gulf refiners would be surprising if US-bound volumes were to stay flat or fall. |
| O2 Faster, and more volume reaches the US (this level or higher) | Fits moderate | A sanctioned expansion with take-or-pay contracts to deliver more Canadian crude to US refiners is what this reading expects. |
| O3 Locked-in preferential terms for the US | Neutral weak | Consistent with the volume part, but the contracts are pipeline transport contracts, not preferential terms for US buyers. |