Sewer Asset Inspection and Maintenance (AIM) – A Targeted Approach to System Operation & Rehabilitation

Presentation of a case study showing the lessons learned while developing a program to find, evaluate, prioritize and undertake rehabilitation projects that achieve a reduction of sanitary sewer overflows and increase hydraulic performance in a collection system. This presentation will document the development and results of a 5 year program implementing a sanitary sewer asset inspection and maintenance program for a midsize utility. Over 1.1 million feet of closed-circuit television (CCTV) inspection and 4,100 manhole inspections were performed, along with 1.1 million feet of smoke testing. The purpose of this presentation will show how data was captured electronically and integrated into the Owner's geographic information system (GIS) and combined with other information to develop a targeted, effective rehabilitation program to reduce sanitary sewer overflows and improve hydraulic performance in the collection system. This targeted approach has allowed the utility to meet stringent regulatory requirements while remaining fiscally responsible to their rate payers.