June 12th ARC Event

June 6th & 12th ARC Event

Thursday June 12th 2008 11:20 EST through 11:55 EST the Midwest ISO invoked the ARC procedure due to a 1,200 MW Net Schedule Interchange obligation created by TLR curtailments. Up to 93 percent of the available ARC operating reserves were utilized during this period to assist in correcting the imbalance. There were no ARS events initiated during the event.