Ice jams are created when rain and melting snow cause layers of ice on the river to rise, break and jam the water like a dam, Damron said. Yesterday’s jam, which started about 6 a.m. or 7 a.m. and broke about 5 p.m., elevated the water level to 10 feet, almost three times its typical summer level, he added.
Weather ‘roller coaster’ brings ice jam on Kankakee River and potential weekend snow drifting to the Chicago area
