Home/Gauges/Iowa/Johnson CountyJohnson County River Gauges8 active river gauges in Johnson County, Iowa.Clear Creek (IA) near CoralvilleCRAI4Clear Creek (IA) near OxfordOXFI4Iowa River above Coralville DamCRVI4Iowa River at Iowa CityIOWI4Muddy Creek (IA) at CoralvilleCMCI4Old Mans Creek near Iowa CityIOCI4Rapid Creek (IA) near Iowa CityIRCI4South Branch Ralston Creek at Iowa CityIACI4