An oil spill has prompted the state of Michigan to close a beach in a state park on Lake Huron.
The day use beach at Cheboygan State Park is closed until further notice because of oil on a 250-yard stretch of the beach, the Michigan Department of Natural Resources and Environment announced.
"Crews are working to clean up the beach and determine the source of the spill," the department's website said.
Private citizens complained to state and federal agencies after discovering the oil on the beach and sheen on the water Tuesday, the National Wildlife Federation said.
The shoreline is home to threatened species including the black tern, pitcher's thistle and dwarf lake iris, the wildlife federation said.
"With the Cheboygan State Park in close proximity to the Straits of Mackinac, this disaster has potential to be far reaching," said Beth Wallace, the federation's Great Lakes oil spill response coordinator.
The spill comes on the heels of a pipeline break in July that spilled nearly 1 million gallons of heavy crude into the Kalamazoo River on the other side of the state. The Kalamazoo River is a major tributary to Lake Michigan.
"We've already seen the devastating effects the Enbridge pipeline oil spill had on the Kalamazoo River and nearby towns," Wallace said. "The last thing Michigan needs is an oil spill in the Great Lakes."