December 26, 2007 ARC Event

Wednesday December 26, 2007 from 17:50 EST through 18:20 EST

The Midwest ISO invoked the ARC for net schedule interchange obligation of 1,000 MW and actual load was 2,000 MW higher than forecasted load. Up to 84% of the operating reserves were utilized during the procedure to correct the imbalance. There were no ARS events during this procedure.