Complex sentence: In 2011, the Federal Energy Regulatory Commission (FERC), in the process of renewing the lease for the power plant operated by Ameren Missouri, determined that numerous homes and structures were encroaching on utility land in violation of federal regulations.
Split into simpler sentences: In 2011, the Federal Energy Regulatory Commission (FERC) renewed the lease for the power plant operated by Ameren Missouri. In the process, FERC determined that numerous homes and structures were encroaching on utility land in violation of federal regulations.