The National Weather Service predicts the swelling river will peak at Billings this afternoon.
ExxonMobil Pipeline Co. President Gary Pruessing has promised to do "whatever is necessary" to mop up oil spilled from the duct at the river bottom.
The 12-inch pipeline burst Friday upstream from a refinery in Billings
After downplaying assertions from state and federal officials that damage from the spill was spread over dozens of miles, Exxon Mobil acknowledged under political pressure that the scope of the leak could be greater.
