The truck was hauling sawdust. Police say a considerable amount of it spilled over the side of the ramp onto the ground below on the east side of the ramp.
The driver of the semi-truck, 50-year old William Duval of Tillamook, sustained non-life threatening injuries and was transported to Salem Health for treatment.
He was cited for Careless Driving and Failure to Maintain a Log Book.
The off ramp has remained closed while crews worked to remove the truck and clean up the ramp. It opened just before 2 p.m.