Enbridge Line 5 Targets September 5 Restart After 31,000-Barrel NGL Release in Wisconsin Truck Strike

September 5, 2026

Sources: Wisconsin Public Radio (31,000 barrels or 1.3 million gallons vaporized, mainly propane and butane; subcontractor truck rolled into excavation Aug 25 near Saxon; 2,000 barrels contained at site; crews using nitrogen and flaring; targeting Sept 5 restart), Enbridge official statement (Line 5 shut, 150 personnel responding, half-mile evacuation zone, no-fly order, 48-hour construction pause starting Aug 31, about 31,000 barrels vaporized), Tank Transport (Line 5 remained shut Aug 31, Sept 5 restart goal not guaranteed, first signals will be nominations/terminal availability/regional pricing changes; Line 5 capacity 540,000 bpd), Michigan.gov (Line 5 transports up to 540,000 barrels per day), Great Lakes Now (31,000 barrels vaporized per Enbridge), FOX6 Milwaukee (Line 5 moves up to 540,000 barrels per day). Quotes verified across outlets.

Enbridge Line 5 remained shut on August 31 with the company working toward but not guaranteeing a September 5 return to service, following an August 25 incident in which an unoccupied flatbed truck rolled into an excavation site and struck the pipeline near Saxon, Wisconsin, releasing approximately 31,000 barrels of natural gas liquids, mainly propane and butane, that vaporized into the atmosphere, according to Wisconsin Public Radio, Enbridge official statement, and Tank Transport. About 2,000 barrels remained contained at the excavation site as of August 29, with crews using nitrogen and controlled flaring to clear the isolated one-mile section of the pipeline. The incident prompted a half-mile evacuation zone, a no-fly order from the Iron County Sheriff, and a 48-hour construction pause requested by the Wisconsin Department of Natural Resources, with around 150 personnel supporting the response. Line 5 is a critical artery for natural gas liquids and light crude moving from western Canada through the US Midwest to refineries and petrochemical facilities in Ontario and the Great Lakes region, carrying up to 540,000 barrels per day of crude oil and natural gas liquids. The shutdown matters because even a temporary interruption can cascade through downstream terminals, loading schedules, propane production, and regional pricing before broad shortage headlines appear. Tank Transport noted that the first useful signals of impact will be changes in nominations, terminal availability, allocations, and regional pricing, rather than immediate documented shortages or extra tanker demand. The Wisconsin strike underscores the fragility of North American pipeline infrastructure at a time when global energy supply chains are already strained by the Strait of Hormuz crisis and elevated European demand for US LNG exports. If the September 5 restart target holds, the disruption will have lasted roughly one week, limiting the broader market impact. However, the 31,000-barrel vap