Two people were injured in an Allegan County plane crash Friday. The sheriff’s department tells us the small plane crashed along the side of US-131 just outside the Plainwell Municipal Airport around 1 p.m. It had four people on board, and injured were the pilot and one passenger. They’re expected to recover from minor injuries. The other two on board were treated for minor injuries at the scene. The crash backed up traffic along the northbound side of US-131. Police have not yet released details about the cause of the crash.