TUMWATER, Wash. — One driver was arrested for DUI, multiple people were injured, and multiple gallons of milk were spilled out onto I-5 in Tumwater after a multi-vehicle crash involving a semi truck on Sunday, according to Trooper Watts with the Washington State Patrol.
The on-ramp from Trosper Road to NB I-5 was blocked after the semi-truck rolled over, and troopers stated they were expecting extended closures for the ramp.
At least one other vehicle was involved, and the driver of that vehicle was arrested under suspicion of DUI.
Mainline traffic was experiencing delays due to the traffic control in place at the bottom of the ramp, which was allowing crews the space they needed to get things cleaned up, Trooper Watts stated at around 4 p.m.
The ramp from Trosper Rd. to NB I-5 is blocked for a semi-rollover collision. There are injuries being reported and the semi trailer is leaking multiple gallons of milk.
— Trooper Kameron Watts (@wspd1pio) May 31, 2026
Troopers are just arriving and extended closures are expected for the on-ramp.
By 6 p.m., the roadway was still blocked, and Trooper Watts stated that the charges for the arrested driver had been upgraded to Vehicular Assault and felony Hit and Run.
Overnight, the WSP released a report stating that the driver of the semi truck, a 38-year-old man from Oregon, was injured and taken to Providence St. Peter Hospital. A 26-year-old woman from Lacey was confirmed to have been arrested and charged with felony hit-and-run. She was not hurt, according to the report.
The WSP report explained that the woman spun out and stopped in the semi truck’s lane, facing sideways. The semi then hit her car and tipped over. The ramp was blocked for a total of 7 hours and 43 minutes.
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