09/26/2026 — A newly filed federal accident report provides a clearer picture of the massive natural gas liquids release from Enbridge Line 5 near Saxon, Wisconsin, confirming that approximately 33,000 barrels—more than 1.3 million gallons—were released after a contractor vehicle struck the exposed pipeline.
The August 25 incident forced Line 5 out of service, prompted the evacuation of a nearby residence and launched a major emergency response and environmental cleanup. No workers or members of the public were injured.
Unattended Truck Struck Exposed Line 5
The incident occurred at approximately 10:00 a.m. on August 25 at a Line 5 valve project near Saxon in Iron County.
According to the federal accident filing, an unattended subcontractor flatbed truck rolled into an open excavation and struck the exposed 30-inch pipeline.
The impact mechanically punctured the pipeline, allowing natural gas liquids—primarily propane and butane—to escape.
Enbridge shut down Line 5 at approximately 10:03 a.m., about three minutes after the failure was identified.
More Than 1.3 Million Gallons Released
The federal filing puts the release at approximately 33,000 barrels, equivalent to more than 1.3 million gallons.
Only about 165 barrels were recovered. Much of the released propane and butane vaporized following the incident.
Despite the enormous release, the product did not ignite or explode.
There were no fatalities and no reported injuries requiring medical treatment or hospitalization. One nearby residence was evacuated as a precaution.
Soil Contamination Confirmed
The federal report confirms that the release resulted in soil contamination around the incident area.
No confirmed contamination of surface water, groundwater or drinking-water supplies has been reported.
Environmental monitoring and remediation remain underway. Crews have continued removing affected soil and monitoring wells around the site.
Air monitoring outside the immediate incident area has also continued as part of the response.
Line 5 Returned to Service Through Temporary Bypass
Following the accident, Enbridge constructed a temporary pipeline bypass around the damaged section.
After testing and regulatory coordination, Line 5 returned to service through the bypass at approximately 5:53 a.m. on September 13.
The return to service restored transportation through the pipeline, but cleanup and investigation activities at the original failure location are continuing.
Incident Estimated to Cost More Than $15 Million
The federal filing estimates the total financial impact of the incident at approximately $15.12 million.
That includes roughly $9.85 million in emergency-response costs and approximately $4.3 million associated with Enbridge property damage and repairs, along with other incident-related expenses.
Those figures could change as remediation and investigation work continues.
Federal Investigation Continues
Federal pipeline regulators continue investigating the failure.
The investigation includes examination of the damaged section of pipeline and the truck involved in the accident. Mechanical and metallurgical analysis of the damaged pipe is also part of the investigation.
The immediate physical cause—the truck striking and puncturing the exposed pipeline—is established. Investigators are still examining the broader circumstances surrounding the incident and whether additional safety or regulatory issues contributed to the failure.
Current Status
Facility: Enbridge Line 5
Location: Saxon, Iron County, Wisconsin
Incident Date: August 25, 2026
Pipeline: 30-inch Line 5
Release: Approximately 33,000 barrels / more than 1.3 million gallons of NGLs
Primary Products: Propane and butane
Fatalities: 0
Injuries: 0 reported
Evacuation: One nearby residence
Environmental Impact: Soil contamination confirmed
Pipeline Status: Returned to service through temporary bypass
Estimated Incident Cost: Approximately $15.12 million
Investigation: Ongoing
Information Status: Federal accident filing confirms major incident details