Overview
- A parked, unoccupied semi-truck rolled into an open excavation on Tuesday and struck a Line 5 valve site near Sitan Road in Saxon, releasing natural gas liquids and prompting precautionary evacuations.
- Responders isolated the damaged segment, shut down the pipeline and cut power to the area while haz‑mat teams and Enbridge crews worked to stabilize the site.
- Air monitoring by local teams and an environmental consultant detected no hazardous or flammable gas levels outside the immediate incident area, though low volatile organic compound readings were measured downwind.
- The Wisconsin DNR sent an Aug. 27 letter demanding Enbridge pause reroute construction until the leak is resolved and the company provides detailed air modeling, release estimates, monitoring data and communication plans with tribes and local officials.
- A PHMSA investigator has been deployed, Enbridge has up to 30 days to file an incident report, and the company estimated a return to service between Aug. 31 and Sept. 5 while it reroutes volumes across its network.