The Federal Energy Regulatory Commission on July 17 approved a new, 30-year license for Union Electric d/b/a Ameren Missouri for the 442.5-MW Taum Sauk Pumped Storage Project.
In June 2008, Ameren Missouri applied for a new license to continue operation and maintenance of the Taum Sauk facility. The 442.5-MW project is located on the East Fork of the Black River (East Fork Black River) and Taum Sauk Creek in Reynolds County, Mo.
The commission issued the original license for the project in August 1965 after the U.S. Supreme Court affirmed the commission’s jurisdiction to require a license for the project. The license expired in June 2010, and since then Ameren Missouri has operated the project under an annual license pending the disposition of this license application.
The project is operated as a peaking and emergency reserve facility for Ameren Missouri’s electrical system. Power is generated by releasing water at rates up to 7,000 cubic feet per second (cfs) from the upper reservoir through the two reversible pump/generator units.
Ameren Missouri completed upgrades to the Unit 1 motor generator in April 2012, and completed upgrades to the Unit 2 motor generator on Feb. 21 of this year. The upgrades increased the installed capacity of each motor generator to 221.25 MW, for a total installed capacity of 442.5 MW. Prior to the upgrades, the total installed capacity was 408 MW.