701 South 9th Street
Mattoon, IL 61938
- Energy sources
- energy efficiency
- natural gas
- Ameren Illinois
- Ameren Energy Marketing
- Ameren Transmission
- energy education
- renewable energy
Hours of OperationCall us immediately to report a natural gas lead or down power lines.
Ameren is traded on the New York Stock Exchange. Follow us at AEE.
Ameren Corporation is the parent company of Ameren Illinois, based in Peoria, Ill. and Ameren Missouri in St. Louis, Mo. The Ameren name was created by the December 1997 merger of CIPSCO Incorporated and Union Electric Company.
Ameren companies, including our 80% share of Electric Energy, Inc., generate a net capacity of 16,600 megawatts of electricity.
We serve 2.4 million electric customers and nearly one million natural gas customers.
Our generation includes one nuclear facility (in Callaway County, Mo.); three hydroelectric plants (Keokuk, Osage and Taum Sauk); and more than a dozen combustion turbine facilities.
Ameren Illinois ranks as the third largest Illinois natural gas distribution operation in total number of customers.
Ameren Missouri is the third largest Missouri distributor of natural gas.
The Ameren companies own and/or operate approximately 21,000 miles of natural gas distribution and transmission mains.