Both legs would remain closed pending the outcome of a hearing to be held next Tuesday, according to the order.
“Enbridge has failed to provide the State with information about the cause of this significant development involving Line 5,” Michigan Attorney General Dana Nessel said adding, Thursday’s ruling, while significant, was only a short-term fix.
“If the lines are put back into operation, one mismanaged incident or accident would result in a historic catastrophe for our state.”
Nessel has been attempting through the courts to permanently shut down the portion of the 67-year-old Line 5 that passes across the Straits’ lakebed, fearing any leak would pollute the Great Lakes.
The line, a part of the vast North American Mainline network, travels through the Straits of Mackinac between Lake Michigan and Lake Huron.
Enbridge shut down both legs of Line 5 on last Thursday after the damage to the east leg, but resumed operations at the west leg after two days.
The company did not immediately respond to Reuters’ request for comment on the order.