KNOXVILLE—More electricity was generated from the Tennessee Valley Authority’s 29 hydroelectric dams in fiscal year 2013, which ended Sept. 30, than in any other year in the agency’s 80-year history.

The dams provided 18.5 million megawatt-hours of clean, renewable energy, breaking the previous record set in 1973 by 122,000 MWh. That is enough electricity to serve more than 1.2 million homes in the TVA service area for an entire year.

Above-average rain and runoff fueled the increase in hydro generation. 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. Runoff is the amount of rainfall that actually reaches streams and creeks, and eventually the Tennessee River, its tributaries, and TVA’s dams. [Read more…]