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Wisconsin Enbridge natural gas pipeline rupture, haze covers site
An unoccupied semi-truck rolled into an excavation at an Enbridge Line 5 valve project in northern Wisconsin, causing a release of natural gas liquids)Skip. The incident led to evacuations, road closures, a no-fly zone, and an ongoing response from hazardous materials teams, with authorities yet to detail the volume of product released.
A parked, unoccupied semi-truck rolled into an open excavation at an Enbridge Line 5 valve project in Iron County, Wisconsin, on Tuesday morning, striking the pipeline and releasing natural gas liquids that enveloped the site in a visible haze, according to authorities and the company.
Enbridge, the Canada-based energy company operating the pipeline, said the incident occurred at approximately 10 a.m. Tuesday, Aug. 25, near Sitan Road in the town of Saxon, close to the Wisconsin-Michigan border. The truck had been parked when it rolled into the excavation site and hit the pipeline, causing the release of natural gas liquids, as reported by both FOX 9 and M Live Michigan.
The Iron County Sheriff’s Office said the affected section of pipeline was isolated. No injuries were reported, but nearby homes were evacuated as a precaution, and Sitan Road was closed until further notice. Authorities also established a temporary no-fly zone over the area and shut off electrical power due to safety concerns, with arrangements being made to assist residents affected by the outage.
Video from the scene, including drone footage, showed a haze and a large cloud of white vapor enveloping the construction site. Officials noted that natural gas liquid releases can involve volatile hydrocarbons capable of forming flammable vapor clouds. The public was asked to stay away from the area and follow instructions from emergency personnel.
The Iron County Sheriff’s Office did not immediately say how much product was released or how many homes were evacuated. Enbridge issued a brief statement Tuesday evening that did not go beyond the information released by local authorities, and it did not provide an estimate of the volume of product released, the duration of the pipeline isolation, or the cause of the truck's movement.
The truck’s owner and operator had not been identified as of the latest reports, and the circumstances leading to the vehicle rolling remained unclear.
Background: Line 5 and the Bad River relocation
The incident occurred at a site linked to Enbridge’s roughly $900 million project to relocate a segment of Line 5 around the Bad River Reservation in Iron County, Wisconsin. Line 5, originally built in 1953, carries crude oil and natural gas liquids between Superior, Wisconsin, and Sarnia, Ontario, including a segment that runs beneath the Straits of Mackinac in Michigan. The line has a capacity of about 540,000 barrels per day.
The project and the broader pipeline have been the subject of ongoing legal and political disputes over environmental and safety concerns. The Bad River Band of Lake Superior Chippewa has sought to remove the pipeline from its reservation, and the relocation is part of that effort.
How each outlet told it
FOX 9
Framing: Headline emphasizes the rupture and haze covering the site, focusing on the immediate visual and physical effects without mentioning evacuations or broader context. — Measured - uses terms like 'spilling liquids' and 'covering the site in a haze' without alarmist language, but includes safety precautions and unresolved questions.
Facts Included:
Truck collided with a pipe at a northern Wisconsin natural gas pipeline excavation site Tuesday, spilling liquids and covering the site in a haze.
Enbridge, a Canada-based energy company, said a parked, unoccupied semi-truck rolled into an open excavation site for the Line 5 valve project in Iron County at around 10 a.m. Tuesday, Aug. 25.
Natural gas liquids started releasing onto the site after the impact; the section of pipe was isolated and emergency crews responded.
FOX6 News obtained viewer video showing a haze spilling over the scene.
No one was hurt; nearby homes in the rural area were evacuated as a precaution.
Iron County Sheriff's Office said natural gas liquids, like propane and butane, are separated from raw natural gas and used as fuel and in production of plastics, electronics, and fertilizers.
It's not clear how a parked, unoccupied vehicle rolled into the site, based on Enbridge's information.
Company did not provide an estimate of how much natural gas liquid leaked, what cleanup operations will entail, or short- and long-term impacts.
Sheriff's office said Sitan Road in Town of Saxon remains closed until further notice as of Tuesday afternoon, and a temporary no-fly zone was established.
According to Enbridge, Line 5 pipeline was originally built in 1953, originates in Superior, Wisconsin, runs 645 miles including under the Straits of Mackinac, to Sarnia, Ontario, Canada.
Pipeline moves up to 540,000 barrels of light crude oil, light synthetic crude, and natural gas liquids per day; liquids get refined into propane.
In May, amid a lawsuit seeking to halt construction of a new pipeline segment, Sierra Club Wisconsin's director called Line 5 'a threat to our water, Tribal sovereignty, and our climate.'
Framing: Headline emphasizes the truck striking the pipeline and forcing evacuations, highlighting the cause and immediate consequence without mentioning the haze or broader political context. — Measured but with undercurrent of concern - uses terms like 'forcing evacuations' and 'risk' while quoting opponents, but maintains factual reporting.
Facts Included:
Northern Wisconsin homes were evacuated after an unoccupied semi-truck rolled into an excavation, striking Enbridge's Line 5 pipeline and causing a release of natural gas liquids, authorities said.
Incident happened about 10 a.m. Tuesday, Aug. 25, near Sitan Road in the town of Saxon near the Wisconsin and Michigan border, according to the Iron County Sheriff's Office.
The truck was parked and unoccupied when it rolled into an open excavation associated with a Line 5 valve project and struck the pipeline.
No injuries were reported.
Nearby homes were evacuated as a precaution and the affected section of Line 5 was isolated, according to authorities.
Local emergency responders and hazardous-materials teams were at the scene Tuesday afternoon; natural gas liquid mishaps can release volatile hydrocarbons which can create flammable vapor clouds.
Drone video from the scene shows a large cloud of white vapor enveloping a construction site.
Sitan Road was closed until further notice; authorities also established a temporary no-fly zone and shut off electrical power because of safety concerns; arrangements were being made to assist people affected by the outage.
Officials asked the public to stay away and follow instructions; sheriff's office did not immediately identify how much product was released or how many homes were evacuated.
Enbridge is building a roughly $900 million Line 5 relocation around the Bad River Reservation through Iron County.
Enbridge issued a short statement on Tuesday evening that did not elaborate beyond information released by local authorities; did not say how much product was released or how long the affected segment might remain isolated.
It was not immediately clear who owned or operated the truck or what caused it to begin rolling.
Line 5 carries crude oil and natural gas liquids across northern Wisconsin and Michigan between Superior, Wisconsin, and Sarnia, Ontario.
Incident comes amid a long-running legal and political fight over the pipeline, which also runs underneath the Straits of Mackinac.
In Michigan, Gov. Gretchen Whitmer has sought to shut down the existing 73-year-old dual pipeline crossing in the straits while Enbridge is pursuing a replacement segment inside a proposed tunnel beneath the lakebed.
The tunnel recently won a key federal permit, but construction remains stalled after the Michigan Supreme Court vacated a separate state utility approval and ordered regulators to conduct a broader environmental review.
Michigan pipeline opponents seized on the Wisconsin incident as emblematic of the risk posed by the Mackinac project; Oil and Water Don't Mix campaign spokesperson David Holtz called it 'a live demonstration of the risk Enbridge is asking Michigan to accept indefinitely.'
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Claim
Confidence
Status
ClaimAn unoccupied semi-truck rolled into an open excavation at an Enbridge Line 5 valve project site in Iron County, Wisconsin, striking the pipeline and causing a release of natural gas liquids.
ClaimNatural gas liquids, like propane and butane, are separated from raw natural gas and used as fuel and in production of plastics, electronics, and fertilizers (as stated by the Iron County Sheriff's Office).
ClaimIn May, amidst a lawsuit seeking to halt construction of a new pipeline segment, Sierra Club Wisconsin's director called Line 5 'a threat to our water, Tribal sovereignty, and our climate.'
ClaimMichigan Governor Gretchen Whitmer has sought to shut down the existing 73-year-old dual pipeline crossing in the Straits of Mackinac while Enbridge pursues a replacement segment inside a proposed tunnel beneath the lakebed.
ClaimThe proposed tunnel recently won a key federal permit, but construction remains stalled after the Michigan Supreme Court vacated a separate state utility approval and ordered regulators to conduct a broader environmental review.
ClaimMichigan pipeline opponents seized on the Wisconsin incident as emblematic of the risk posed by the Mackinac project; Oil and Water Don't Mix campaign spokesperson David Holtz called it 'a live demonstration of the risk Enbridge is asking Michigan to accept indefinitely.'
ClaimA truck collided with a pipe at a northern Wisconsin natural gas pipeline excavation site Tuesday, spilling liquids and covering the site in a haze.