I-84 westbound Partial Westbound Closer near La Grande.

UPDATE 9:20Pm : From ODOT: “I-84 MP 265 Westbound truck crash” (roughly 7 miles east of La Grande). “Closure will last several hours due to a diesel spill covering both lanes of traffic. Traffic can exit at MP 265 and use exit 259 or 261 to return to the freeway Westbound.
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From ODOT: “I-84 westbound is closed between La Grande and Cabbage Hill, milepost 265 to 224, due to a crash. Expect an extended closure that will likely last past midnight. OR 204 is not a detour route and is closed to trucks.”