The utility filed that request on April 17. If successful, the higher rates would go into effect in January.
For residents in central Illinois, that would mean an 8.3 percent increase for average use, adding $6.37 to monthly bills.
Ameren plans to start installing new customer meters this summer. According to Ameren, The upgrades will help it detect and isolate outages faster.
The Citizens Utility Board watchdog group opposes the rate increase.