Historians are racing to locate Great Lakes shipwrecks before a seemingly unstoppable invasive mussel destroys them and erases part of the region's heritage.

District Judge Steven Hippler of Ada County, Idaho, laid out the daily schedule and other details of the trial, set to begin Aug. 11, during one of the final court hearings Thursday.

Invasive mussels cause billions of dollars in damage to water infrastructure annually and threaten aquatic ecosystems.