Three months ended Plant availability Dec 31 2012 Sep 30 2012 Jun 30 2012 Mar 31 2012 Dec 31 2011 Sep 30 2011 Jun 30 2011 Mar 31 2011 Total average plant availability excluding acquired Sundance PPA and CPILP plants 89% 97% 81% 97% 87% 97% 91% 93% Alberta commercial plants and acquired Sundance PPA Genesee 3 56% 100% 95% 84% 44% 100% 100% 100% Keephills 3 100% 100% 100% 95% 99% 100% n/a n/a Clover Bar Energy Centre 1, 2 and 3 98% 97% 97% 98% 99% 91% 65% 54% Joffre 65% 98% 99% 94% 93% 99% 78% 99% Halkirk 95% n/a n/a n/a n/a n/a n/a n/a Taylor Coulee Chute n/a n/a n/a n/a 100% 100% 94% 100% Clover Bar Landfill Gas 92% 92% 86% 95% 77% 86% 86% 95% Alberta commercial plants – owned 81% 99% 98% 93% 84% 97% 82% 87% Acquired Sundance PPA 74% 97% 90% 95% 81% 72% 91% 98% 79% 98% 96% 93% 83% 89% 84% 91% Alberta contracted plants Genesee 1 98% 93% 97% 97% 100% 100% 81% 92% Genesee 2 94% 99% 72% 100% 100% 100% 99% 100% 96% 96% 85% 98% 100% 100% 90% 96% Ontario and British Columbia contracted plants Island Generation 100% 100% 100% 100% 100% 100% 100% 99% Kingsbridge 1 100% 99% 99% 99% 98% 99% 99% 98% Quality Wind 99% n/a n/a n/a n/a n/a n/a n/a Brown Lake 100% 99% 100% 99% 93% 53% 99% 100% Miller Creek 85% 71% 38% 85% 78% 92% 99% 78% 100% 97% 94% 98% 98% 98% 100% 97% North East U.S. commercial plants Bridgeport 85% 95% 35% 96% 59% 96% 100% n/a Rumford 84% 97% 84% 98% 94% 95% 99% n/a Tiverton 89% 99% 77% 100% 89% 97% 100% n/a 86% 97% 58% 98% 76% 96% 99% n/a North Carolina U.S. contracted plants Roxboro 89% 97% 84% 96% 100% n/a n/a n/a Southport 90% 100% 87% 96% 100% n/a n/a n/a 90% 99% 86% 96% 100% n/a n/a n/a CPILP plants n/a n/a n/a n/a 96% 96% 88% 92% Capital Power Corporation Management’s Discussion and Analysis 2012 62