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2006_0925_Packet
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2006_0925_Packet
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REQUEST FOR COUNCIL ACTION <br />DATE: 09/25/06 <br />ITEM: 3.e <br />Department Approval: Manager Reviewed: Agenda Section: <br />Item Description: Authorize Replacement of Supervisory Control and Data Access System <br />(SCADA) <br />Background: The city has operated a water distribution system and sanitary sewer collection <br />system since the early 1960's. Sio� sewer facilities were constructed over the years as the city <br />developed. These are critical health and safety services vital to our everyday lives that need to <br />function 24 hours a day, 365 days a year. Each system has a pumping station that needs to <br />operate without failure to ensure there is no loss of pressure in the water system and no property <br />damage due to sewer backups or flooding of private property. We monitor these pumping <br />stations utilizing SCADA (Supervisory Control and DATA Acquisition). This system allows <br />operations staff and supervisory staff to monitor operations and be notified immediately of any <br />monitored failure. These types of failures can range from power failure to high water alarms. <br />We can also review pumping flows and tank elevations to optimize efficiency and reduce power <br />demand to save on energy bills and participate in load management programs. <br />The existing SCADA system was purchased in1992 and was state of the art technology at that <br />time. It has proprietary hardware and software components that cannot be serviced by city staff <br />or competing vendors. We are captive to the installing vendor and pay their regular and <br />emergency service rates. The existing system is outdated and no longer supported. A major <br />failure would put the city at risk of property damage or loss of water pressure. We are seeing an <br />increasing number of short-term communications failures requiring immediate response. The <br />hardware dialer, the call-out mechanism that alerts city staff, frequently fails and requires <br />resetting. These problems are increasing overtime call-out costs to the city, as many are <br />monitoring system failures and not pumping system failures. <br />We have been planning for replacement of the SCADA system for several years and have <br />explored several current technology options. <br />Discussion: Staff has explored four non-proprietary replacement options for the SCADA <br />system. We feel installing non-proprietary, off-the-shelf hardware gives us the most flexibility <br />for system expansion and competitive pricing. We are also looking for flexibility in the data <br />communications to allow the city to adapt to current and future networking technology. With <br />additional fiber optic infrastructure being constructed and the potential for a citywide data <br />network in the future, we feel it is important to utilize and share common data networks in place <br />to maximize cost savizags. Another pr�arzty considered is purchasing a system that city IT staff <br />can help support to reduce outside vendor maintenance and troubleshooting costs. Another <br />
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