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1. Critical Large Diameter Sewer Rehabilitation. <br /> 2. Sanitary Sewer Overflows Due to Inflow and Infiltration. <br /> 3. System Operation and Maintenance <br /> 4. Small Diameter Sewer Rehabilitation <br /> The 2011 Annual Sanitary Sewer Inspection Program addresses all sanitary sewer priorities. <br /> Televising is needed to find deteriorated sanitary sewers for large and small diameter sewer <br /> rehabilitation. Televising also assists with operation and maintenance by finding areas that need to <br /> be cleaned because of roots and other debris. All of the above mentioned televising assists in inflow <br /> and infiltration reduction efforts. <br /> Pipeline Inspection Services are Necessary to City's Sewer Maintenance Program <br /> Pipeline inspection services have proven invaluable in locating problems and answering questions <br /> that arise in the normal maintenance of the City's sewers along with ongoing condition assessment. <br /> Major work items are detailed below: <br /> 1. Sewer Line Inspections: This work is performed through the insertion of a camera that is driven <br /> or pulled through sewer lines in order to determine the condition of the line. This information <br /> assists staff in preparing improvement projects or identifying maintenance needs. <br /> 2. Manhole Inspections: Manholes are often a weak link in the sewer system in that they are direct <br /> access points to the sewer system. Many manholes are located on streets and are subject to traffic <br /> loads and heavy storm water inflow. These forces often have a significant effect on the structural <br /> integrity of a manhole and the sewer system in general. A significant step in improving the <br /> overall reliability of the City's sewer system and decrease storm water inflow is to gain <br /> information on the condition of the City's manholes and improve them. <br /> 3. Smoke Testing: This work involves forcing smoke through a sewer line to determine if there are <br /> holes in the line that allow storm water to flow into the line causing sewer overflows. Smoke <br /> testing can be used to identify illegal sewer connections and damaged pipe. <br /> 4. Manhole Rehabilitation: A contract unit price is provided to allow the contractor to repair <br /> damaged manholes without going to the expense to dig it out and replace them. If manhole <br /> deterioration is caught early enough, a significant amount of money is saved by lining to restore <br /> its structural integrity. <br /> 5. Point Repairs: Point repairs involve placing a small liner to repair a specific spot of damaged <br /> pipe without having to resort to digging the pipe up and replacing it. As with manhole <br /> rehabilitation, if pipe damage is caught early enough, there are significant cost savings in spot <br /> lining a damaged section of pipe as opposed to digging it up. <br /> 6. Special Studies: This work involves investigating the sewer system to find unknown connections, <br /> unknown manholes or pipelines. Special studies have been made to identify sources of <br /> abnormally heavy flow in sewers, locations where storm water is infiltrating into the pipe causing <br /> overflows, or where there are incidents of heavy grease clogging the line causing sewer backups. <br /> Page 12 <br />