It was a record year for the Tennessee Valley Authority.
On Thursday, TVA announced that its 29 hydroelectric dams generated more electricity in fiscal year 2013 than in its 80 year history. The dams provided 18.5 million megawatt-hours of energy, breaking the previous record set in 1973 by 122,000 MWh. TVA says that's enough electricity to serve more than 1.2 million homes for an entire year.
Our rainy summer helped fuel the increase in hydro generation. According to TVA, the Tennessee Valley received almost 62 inches of rainfall and almost 30 inches of runoff in fiscal 2013, which were 121 percent and 136 percent of normal, respectively.
"This is a credit to all the hard working TVA employees who manage our integrated river system around the clock, everyday of the year," said Chip Pardee, TVA executive vice president and chief generation officer. "This includes the professionals at the dams, in our river forecast and power dispatch centers, and the rest of our transmission and operations groups. Together they have maximized low-cost hydro generation for the 9 million power consumers in TVA's power service area."
"It has been a wet year and our River Operations team took advantage of it. We were able to generate electricity from the dams in months when we typically are trying to hold on to water, like July for recreation and stewardship purposes," John McCormick, TVA vice president, River Operations said. "As our cheapest energy source, all this hydro generation has helped lower our fuel cost to customers."
TVA continues to update and modernize its dams to increase efficiency.
"In a typical year, conventional hydroelectric power makes up about 8 to 10 percent of TVA's total electricity production, with the bulk of our generation coming from nuclear, coal and natural gas. But In fiscal 2013 hydroelectric power contributed about 13 percent of the generation mix," McCormick said. "More importantly, TVA was able to reduce flooding impacts during large rain events throughout the year," he said. "In January, TVA's operations averted about $800 million in flood damages and an additional $48 million in July," added McCormick.
During a normal year, TVA's efforts prevent approximately $250 million in flood damage. TVA estimates it has averted nearly $7 billion in flood damage since it completed its first dam, Norris Dam, in 1936.