The Federal Energy Regulatory Commission on July 21 approved a June 9 application from Alabama Power, licensee for the Coosa River Project, for an amendment of the project’s license to replace the Unit 1 turbine at the Jordan Development of the project.
The project is located on the Coosa River in Cherokee, Etowah, Calhoun, St. Clair, Talladega, Shelby, Coosa, Chilton, and Elmore counties, Alabama, and Floyd County, Georgia. In June 2013, the commission issued an order Issuing a New License for the Coosa River Project.
The Coosa River Project includes seven developments. The Jordan Development includes a 300-foot-long by 62-foot-wide concrete powerhouse containing four generating units. These are three units with a vertical propeller turbine with a 36,000 horsepower rating (27,000 kW) and a maximum discharge of 4,960 cfs and a generator rated at 25,000 kW. And one unit with a vertical propeller turbine with a 40,000 horsepower rating (30,000 kW) and maximum discharge of 5,200 cfs. The total rated capacity is 100 MW.
Alabama Power requested approval to modify Unit 1 at the Jordan Development to address significant maintenance needs and to improve power and efficiency. The approved scope of work for Unit 1 includes complete turbine replacement, wicket gate replacement, governor and servomotor system replacement, turbine and thrust bearing refurbishment, and related component replacement. Alabama Power also proposes to extend vacuum breaker piping to enhance Unit 1’s aerating capability through a draft tube aeration system that will operate in a similar manner as Units 2, 3, and 4 at the Jordan Development. Alabama Power does not expect the turbine replacement to result in an increase to the total rated capacity or the maximum discharge of the unit at rated conditions.