Companies that rely on the Chicago River as a channel between Lake Michigan and the Mississippi River won another battle in the Supreme Court Monday. The court refused for the second time to order the closure of two locks that the state of Michigan argues would prevent invasive Asian carp from infiltrating the entire Great Lakes region.

Nearly $1.7 billion in cargo navigated one of the locks in 2008, according to a Wall Street Journal report. But Michigan says that the economic repercussions of leaving the lock open and allowing Asian carp to enter the lake would be economically catastrophic. The high court rejected Michigan’s first request to order the lock closed in January.

For more, read the full Wall Street Journal story.