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City of Redwood City Page 25 Sewer System Management Plan, March 2018 Element IV OPERATIONS AND MAINTENANCE Element IV: PROGRAM (IV) Operation and Maintenance Program - The SSMP must include those elements listed below that are appropriate and applicable to the Enrollee’s system: (a) Maintain an up-to-date map of the sanitary sewer system, showing all gravity line segments and manholes, pumping facilities, pressure pipes and valves, and applicable stormwater conveyance facilities; (b) Describe routine preventive operation and maintenance activities by staff and contractors, including a system for scheduling regular maintenance and cleaning of the sanitary sewer system with more frequent cleaning and maintenance targeted at known problem areas. The Preventative Maintenance (PM) program should have a system to document scheduled and conducted activities, such as work orders; (c) Develop a rehabilitation and replacement plan to identify and prioritize system deficiencies and implement short-term and long- term rehabilitation actions to address each deficiency. The program should include regular visual and TV inspections of manholes and sewer pipes, and a system for ranking the condition of sewer pipes and scheduling rehabilitation. Rehabilitation and replacement should focus on sewer pipes that are at risk of collapse or prone to more frequent blockages due to pipe defects. Finally, the rehabilitation and replacement plan should include a capital improvement plan that addresses proper management and protection of the infrastructure assets. The plan shall include a time schedule for implementing the short- and long-term plans plus a schedule for developing the funds needed for the capital improvement plan; (d) Provide training on a regular basis for staff in sanitary sewer system operations and maintenance, and require contractors to be appropriately trained; and (e) Provide equipment and replacement part inventories, including identification of critical replacement parts. IV-1 Collection System Mapping The City maintains comprehensive maps of its collection system, made available to the public at the Maps and Record Counter at City Hall. In order to keep the maps current, the Engineering Division integrates as-built information from City projects and private developments. In addition, when Wastewater Division staffs discover inaccuracies, the findings are logged onto the map’s master copy and forwarded to the Engineering Division. Information updates are entered into both the City’s computer-aided design (CAD) and geographic information systems (GIS). Maintenance workers carry block books (printed from the City’s GIS records) and mobile maps by utilizing ESRI enabled GIS software to identify sewer and storm drain lines for maintenance purposes. HiperWeb is the software utilized by the City for utility infrastructure mapping. HiperWeb provides City staff with the ability to access attribute data for sewer and stormwater pipelines using a mobile device. Stormwater facilities are included in these block books and HiperWeb software with different symbology. Sanitary sewers are shown as solid, brown color-coded lines with arrows indicating flow direction. Sewer lines are also labeled with their material type. Force mains can be differentiated from gravity sewers by the type of material. The block books also show streets and parcels, manhole locations and elevations, pipe locations and sizes, lift station locations, and locations of air relief valves (ARVs). 6.2.A. - Page 33