SPOKANE, Wash. - The Washington State Patrol responded to a wreck involving a semi-truck early Saturday morning. It happened in the eastbound lanes of I-90 near the Hamilton exit when the driver, 50-year-old Andrew Cashion of Spokane Valley, lost control of the semi-truck and struck a guardrail. The truck came to rest on top of the guardrail, blocking the Hamilton on-ramp for hours. The ramp is now back open. Cashion was not injured and the crash remains under investigation.