Integrated Resource Plan (IRP)

Ameren Missouri's Integrated Resource Plan (IRP) is a 20-year plan that supports cleaner energy in Missouri, including major expansions of solar and wind power. The IRP, which is filed every three years with the Missouri Public Service Commission, examines electric customers' projected long-term energy needs. It also describes our preferred approach to meeting those needs in a cost-effective fashion that maintains system reliability as we move to cleaner and more diverse sources of energy generation. A variety of stakeholders are involved in developing the IRP, including representatives from state agencies, consumer advocates and environmental advocates.

Ameren Missouri is accelerating the transition of our generation fleet to a cleaner and more diverse portfolio in a responsible fashion. Specifics of our plan include:

Increased Wind Generation

By 2020, Ameren Missouri plans to add at least 700 megawatts (MW) of wind generation, representing an investment of approximately $1 billion. The potential exists to add even more wind generation in the coming years as a result of improving technology and economics, as well as renewable energy initiatives with large customers. In 2014, Ameren Missouri's previous IRP had forecasted additions of 120 MW of wind generation by 2020. 

Reduced Carbon Emissions

Ameren Missouri plans to reduce carbon dioxide (CO2) emissions 35 percent by 2030, 50 percent by 2040 and 80 percent by 2050 (based on 2005 levels). This represents a significant increase from the 2014 IRP, where carbon dioxide emission reduction plans were 15 percent by 2030 and 40 percent by 2040.  

Increased Solar Generation

By 2025, Ameren Missouri plans to add 50 MW of solar generation, with a total increase of 100 MW by 2027. The 2017 plan includes a 60 percent growth in renewable generation over the 2014 plan due to the improvement in technology and economics of these cleaner energy resources
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