$45 Million Annual Tree-Trimming Program ($135 million over three years) Our aggressive tree-trimming program nearly doubles AmerenUE’s 2003 tree-trimming budget. This program will address numerous lines built to serve housing growth over the past four decades, when new trees were planted that today jeopardize the system during severe weather. See Trees and Your Service to learn more about our tree-trimming process.    Find more information about AmerenUE’s Power On project in the Power On FAQs.