Thursday June 12th ARC Event

Thursday June 12th ARC Event

Thursday June 12th 2008 08:35 EST through 09:00 EST the Midwest ISO invoked the ARC procedure due to a 400 MW Net Schedule Interchange obligation and approximately 700 MW loss of generation. Up to 28 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.