Compared to normal levels the positive pre-tax gross margin effect from weather was approximately $49 million or about $0.21 per share.Coal generation fleet availability was higher than last year primarily due to planned outages at both Iatan units and at La Cygne 1 in 2011. Nuclear availability was negatively impacted due to the unplanned outage at Wolf Creek in the first quarter of 2012 and in the second quarter of 2011 for the extended refueling outage.
|Year Ended December 31||2012||2011|
|Equivalent Availability - Coal Plants||85%||81%|
|Capacity Factor - Coal Plants||70%||65%|
|Equivalent Availability - Nuclear||80%||71%|
|Capacity Factor - Nuclear||81%||72%|
|Equivalent Availability - Coal and Nuclear||84%||80%|
|Capacity Factor - Coal and Nuclear||72%||66%|