The Tennessee Valley Authority's 29 hydroelectric dams generated more power than any fiscal year in the agency's 80-year history.

TVA's dams provided 18.5 million megawatt-hours of energy, breaking the 1973 record by 122,000 MWh.

That difference is enough electricity to serve more than 1.2 million homes in the six-state TVA service area for an entire year.

An above average rain and runoff fueled the increase in hydro-electric power generation.

The Tennessee Valley received almost 62 inches of rainfall and almost 30 inches of runoff in fiscal 2013, which were 121% and 136% of normal, respectively.

Runoff is considered to be the amount of rainfall that actually reaches streams and creeks, and eventually the Tennessee River, its tributaries and TVA's dams.