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Pipeline Inspection Services <br /> Pipeline inspection services are crucial in identifying problems underground 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 motorized camera that <br /> is driven through the sewers to determine the condition of the pipe. This information assists staff <br /> in preparing improvement projects or identifying maintenance needs. <br /> 2. Sewer Cleanin�: Sewer cleaning is the most critical component in providing and preserving full <br /> capacity within the sewer system. The cleaning process removes all debris, grease and roots from <br /> the sewer by use of high water pressure and cutting heads. All accumulated debris will be <br /> vacuumed out of the sewer system. Combining cleaning with televised inspection has proven to <br /> be very effective in assuring clean sewer lines and an optimal inspection. <br /> 3. Manhole Inspections: Manholes are often a weak link in the sewer system in that they are direct <br /> access points from the surface to the sewer system. Many manholes are located on streets and are <br /> subject to traffic loads and heavy storm water inflow. These forces often have a significant effect <br /> on the structural integrity of a manhole and the sewer system in general. A major step in <br /> improving the overall reliability of the City's sewer system, and decrease storm water inflow, is to <br /> gain information on the manhole condition and make the necessary improvements. <br /> 4. Smoke Testin�: This work involves blowing 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 also be used to identify illegal sewer connections and damaged pipes. <br /> 5. Manhole Rehabilitation: A unit price is provided to repair damaged manholes without going to <br /> the expense to replace them. If manhole deterioration is caught early enough, a significant <br /> amount of time and money is saved by lining the manhole to restore its structural integrity. <br /> 6. 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 an isolated damaged section of pipe as opposed to digging it up or fully lining the pipe. <br /> 7. Special Studies: This work involves investigating the sewer system to find unknown connections, <br /> unknown manholes, or pipelines. Special studies have been completed 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 /> 8. Rapid Response Inspections: Rapid-Response inspections are generally used to investigate <br /> critical sewer problems such as sinkholes, blocked sewer services or mains, maintenance <br /> problems, and some residential complaints. The ability to quickly get a camera into a line that is <br /> experiencing a failure of some type provides maintenance staff with a large amount of <br /> information to be used in determining the proper course of action. <br /> Ongoing televised inspection efforts are generally focused on sewers that have not been inspected or <br /> that need an updated inspection. Having televised inspection data on all the City's sewers will assist <br /> staff in creating a GIS database for the City's sewer system condition assessment. Significant effort <br /> Page � 2 <br />