New Rules and Old Plants May Strain Summer Energy Supplies - NYTimes.com

By MATTHEW L. WALD

Published: August 11, 2011

The E.P.A. estimates that a rule on air toxins and mercury that it expects to complete in November will result in a loss of 10,000 megawatts — or almost 1 percent of the generating capacity in the United States. Electricity experts, however, say that rule, combined with forthcoming ones on coal ash and cooling water, will have a much greater effect — from 48,000 megawatts to 80,000 megawatts, or 3.5 to 7 percent.