With a hydroelectric generating capacity of 1100 megawatts, the 8-gener-ator Muddy Run Pumped Storage Facility in southeastern Pennsylvania helps the mid-Atlantic power grid meet peak demands. The local Amish families won't use a single watt produced by the plant, but the rest of us - millions of electricity users - take it for granted that our air conditioners, televisions, and other appliances will work when we turn them on.
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