The 2003 Oldsmobile was traveling east on Kreutzer before it left the roadway, striking the guardrail and then continuing down an embankment into the creek and flipping over, according to a preliminary investigation.
The female occupant was able to get out of the vehicle on her own. Fire officials extricated the male driver from the van, according to the news release.
The accident shut down Kreutzer Road between Haligus Road and Smith Drive and the Union Pacific Railroad until shortly after 4 p.m.
Police said the female was taken to Centegra Hospital in Woodstock and the male was transported to Advocate Sherman Hospital in Elgin. Both were in stable condition at the scene.
The crash is currently under investigation.