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Story summary
- A watercraft collision near the McIntosh Woods State Park boat ramp during July 4 festivities killed a 14-year-old girl from Dyersville.
- Five riders – an adult with a minor and three minors – were taken to MercyOne Medical Center in Mason City.
- One minor remains in serious condition at the Mayo Clinic.
- The adult and two minors were released after Iowa Department of Natural Resources said the cause is under investigation.
