Michigan attorney general Mike Cox will file suit in federal court to force the closure of Chicago-area locks that separate the Great Lakes from Illinois waters shown to contain Asian carp.
A news conference is scheduled for this morning in Detroit to announce details of the suit.
"Asian carp must be stopped now because we will not have a second chance once they enter Lake Michigan," Cox said in a statement. "The combination of finding carp and carp DNA so close to Lake Michigan is something that should cause great concern for us all."
The suit will seek to force the U.S. Army Corps of Engineers, the state of Illinois, and the Metropolitan Water Reclamation District of Greater Chicago to close the locks and present a comprehensive, long-term solution to the crisis.
Last week, Great Lakes Interagency Task Force chairwoman and U.S. Environmental Protection Agency administrator Lisa Jackson announced $13 million in federal funding to prevent Asian carp from migrating closer to the Great Lakes.
Asian carp have been discovered north of the barrier in the Chicago Sanitary and Ship Canal. Officials there had put up an electronic barrier to prevent the carp from making it to Michigan waters, but federal officials believe the fish may have breached the barrier.