Sewer Collection System Program
In an effort to do all we can to prevent Sanitary Sewer Overflows (SSO's) or sewer backups from happening to our customers, in 2005 the City made a decision to invest in the equipment and manpower needed to perform a Sewer Collection System Maintenance Program.
There are over 100 miles of sewer main and 1,815 manholes that make up our collection system. In summary, our program involves using a Combination Sewer Jet/Vacuum Truck to clean each foot of sewer main, and then they are televised with Closed Circuit Television (CCTV) camera equipment to record the condition of our mains. When trouble spots are identified, they are repaired.
Another important aspect of our program is GIS mapping of the sewer mains and manholes. The CCTV camera has computer software that is equipped with a mapping program. This program is compatible with the City's GIS Mapping System allowing us to provide valuable detail and accurate locations on our collection system infrastructure and valuable asset management data. Video footage of each main is also attached to the actual location in the mapping program.
It's a process that takes time. Between sewer jetting and cameraing each line, our staff is able to cover an average of 300 feet per day. It is estimated to take 8 years to get through the entire system. This includes time for repairing damaged mains and bringing manholes up to grade. When we've reached the end of the system, we'll start over again.