2006 Water Comprehensive Plan - City of Bellevue

PREVENTIVE MAINTENANCEPreventive maintenance consists of regularly servicing pumps and motors, PRVs, exercisingvalves and fire hydrants, cleaning reservoirs, and flushing water mains. Preventive maintenanceis essential to assuring the proper and efficient operation of the water system and maximumuseful life of facilities. The frequency of maintenance inspections and servicing depends onoperation and manufacturer requirements of the facility and is defined in SOPs and servicemanuals for each facility. These regular activities are also done on priority bases; servicingpumps and cleaning reservoirs have the highest priority. The operation and maintenance ofspecific Utility facilities are discussed below.Bellevue uses MAXIMO software for its maintenance management information system(MMIS). The program is accessible at personal computers throughout the city. The maintenancemanagement information system makes it possible to fully integrate operations and maintenanceplanning, budgeting, and performance reporting. The system tracks how actual performancecompares to plan with respect to infrastructure maintenance, customer service demand, andcosts.The tangible results of the system include an inventory of the City's infrastructure; the activitiesrequired to maintain it in good condition; condition assessment history and trend analysis;defined levels-of-service; the resources of labor, equipment, materials, and "outside" servicesrequired; and their schedules.The MAXIMO system has been in use at Bellevue since 1999. Bellevue is currently evaluatingnext generation maintenance management software which would enhance the asset managementcapability and interface better with the Customer Information System and other City softwareapplications.Valves. The field maintenance personnel exercise all the valves in the system once every twoyears. The City has identified and located all of the valves in the system and keeps theinformation in MAXIMO.Fire Hydrants. The operation of every fire hydrant in the system is checked every two years.The recordkeeping system for fire hydrants is similar to that described for valves.PRVs. Field operations personnel perform routine maintenance to all pressure regulatingvalves, including those at inlet stations. Maintenance intervals depend on valve function andoperation. Inlet stations are assigned the highest priority. All valves are inventoried inMAXIMO.Distribution/Transmission Pipelines. The City monitors, operates and maintains the pipelinesystem on a continual basis. In addition, the City flushes all water mains every six years toassure water quality.9-11