Ben Macuga, a biology researcher from the Indiana University Northwest, takes water samples from Burns Ditch at the Portage Lakefront and Riverwalk for testing on Aug. 21, 2019. The National Park Service closed the Portage Lakefront and Riverwalk beach areas and waters at Indiana Dunes National Park due to a chemical spill. (Zbigniew Bzdak / Chicago Tribune)
Indiana steel mill to pay $3 million for dumping toxins into Lake Michigan tributary that led to fish kill and beach closures
