Updated at 5:40 p.m. with information on why operations affected, impact on Chicago wholesale gasoline prices
Phillips 66 has unexpectedly shut down a 64,000 barrel-per-day crude unit and associated vacuum distillation unit and a coker at its 306,000 barrel-per-day refinery Wood River refinery in Metro East after heavy storms knocked out power to the western portion of the plant on Tuesday, according to a source familiar with the plant's operations.
It is still unclear when the units will be restarted, the source said.
The western section of the plant had been shut recently due to weather-related power issues, and the outage lasted a few days.
The shutdown of the units was first reported on Wednesday morning by energy industry intelligence service Genscape.
The company declined to comment on the shutdown of the units, saying it was standard policy not to discuss plant operations.
Chicago cash gasoline differentials rose 2.75 cents per gallon on Wednesday on news of the power outage, traders said.