The St. Charles Municipal Electric Utility knew it faced a large volume of aging underground residential distribution (URD) cable. The utility decided to track cable failures in greater detail after experiencing a steady increase in outage rates. The resulting data clearly showed the problem subdivisions, which were not necessarily the ones with the oldest electric lines. As Novinium began rehabilitating the highest prioritized subdivisions, each segment was tested using a TDR and categorized for either rejuvenation or replacement based on Novinium’s injection criteria. Segments with blockages, or those that were otherwise identified as non-injectable, were replaced.