WASHOUGAL, Wash. -- A semitrailer overturned Tuesday morning on SR 14, spilling hot oil onto both lanes of the highway, about eight miles east of Washougal.

The highway was closed in both directions due to the spill. The Washington State Department of Transportation announced at 3:45 a.m. Wednesday that the road had reopened.

Cleanup was complicated when the oil began hardening and had to be "scraped off the road and excavated from [the] slope," according to the Washington Department of Ecology.