The purpose of this project is to assist the City in providing professional services and inspection support to its on-going, comprehensive collection system assessment program. The Water Utilities Division (WUD) of the Public Works Department is responsible for maintaining the City of Tempe’s sewage collection system, which includes approximately 500 miles of gravity sewer mains and more than 10,000 manholes. The city has an on-going, comprehensive collection system assessment program with current goals to inspect and assess 60 miles of prioritized sewer pipeline and 1,000 prioritized manholes per year. The program utilizes NASSCO scoring criteria combined with sound engineering judgment in identifying defects that are deemed to require repair or replacement. Planned rehabilitation work is incorporated into the collection system Capital Improvements Program (CIP). Both condition assessment and rehabilitation work are prioritized and programmed based upon criticality and condition risk factors. Tools used by WUD in managing the collection system include the geographic information system (GIS) mapping of physical aspects based primarily on as-built records in ArcGIS Pro. WUD is transitioning to a Computerized Maintenance Management System (CMMS) software called KloudGin to record inspections, preventative maintenance, cleaning activities, blockages, repairs, and odor issues. Reports summarizing previous studies, inspections, assessments, and past Rehabilitation and Repair (R&R) projects are on file as electronic files. Closed Circuit Television (CCTV) pipeline inspections are stored using WinCan, while manhole inspections are captured using iBak Panoramo technology
