Transmission Lineman

Our Power System

TVA’s power portfolio is dynamic and adaptable in the face of changing demands and regulations. Our emphasis has moved away from traditional coal-based production and toward cleaner forms of power generation, and today the power we deliver is 54 percent carbon-free.

So that we remain responsive to the Valley’s winter and summer energy peaks, we’re adding more cleaner-burning natural gas units. To generate more bulk power, we’ve added the 21st century’s first new nuclear unit. As always, we generate clean, natural power with our 29 hydroelectric dams.

As for renewables, we continue to offer programs that allow Valley-based businesses and consumers to partner with us to generate solar, wind and biogas energy.

Meanwhile, we’re decommissioning some of our oldest coal-fired units to make way for these new, more efficient forms of power production. It’s a natural evolution—one that fits with our historic mission of providing reliable, low-cost energy that makes life better for the people we serve.

Our Changing Portfolio

Diverse Portfolio Pie Chart


Note: Graph represents energy. FY20 and FY30 forecasts are based on the FY20 Budget Power Supply Plan. EE includes TVA Energy Efficiency Program impacts on a Net Cumulative Realized at System basis, 2007 base year, and excludes energy efficiency effects from external factors.

TVA’s Generating Assets Today

  • 6 fossil plants (26 active units)
  • 3 nuclear plants (7 units)
  • 29 hydro plants (109 units)
  • 1 pumped storage hydroelectric plant (4 units)
  • 9 natural gas combustion turbine gas plants (87 units)
  • 8 natural gas combined cycle gas plants (14 power blocks, 35 units [21 gas turbines, 14 steam turbines])
  • 1 diesel generator site (5 units)
  • 15 solar energy sites
  • 1 wind energy site