The two-car crash happened south of the drawbridge near Coho Drive.
One lane of U.S. 31 southbound remained open, and the northbound lane was not affected.
A 28-year-old Grand Haven woman and her 11-year-old son were taken by ambulance to North Ottawa Community Hospital following the crash.
Police said their injuries were non-life-threatening.
Stay tuned to grandhaventribune.com for updates and read the story in Friday's Tribune. Subscribe today by clicking HERE.