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Orono, Minnesota <br />Supervisory Control and Data Acquisition (SCADA) System for Water/Wastewater Systems <br />August 22, 2016 <br />Backeround and Purpose: <br />The City of Orono operates water and wastewater utilities that serve the City residents with vital <br />services. The water system includes supply wells, water treatment, pumping, elevated storage, and <br />distribution systems. The wastewater system includes collection, pump stations and forcemains. The <br />wastewater is conveyed to further collection, pumping and treatment facilities operated by <br />Metropolitan Council Environmental Services (MCES). <br />The City currently has a SCADA system that was constructed as part of projects in 1998 and 2002. The <br />system consists of Allen-Bradley programmable logic controllers (PLCs) located at the following water <br />sites: <br />• Highway 12 Water Treatment Plant (Wellhouse No. 3) <br />• Navarre Water Treatment Plant <br />• Elevated Storage Tank No. 2 <br />The system was also constructed with computers at the following locations: <br />• Navarre Water Treatment Plant <br />• Public Works Building <br />Communication is provided between the above sites using 900MHz spread -spectrum radios. One <br />exception is the communication link between the Highway 12 Water Treatment Plant (Wellhouse No. 3) <br />and Elevated Storage Tank No. 2, which operates in a 450MHz licensed frequency. <br />The computers were originally furnished with Rockwell (Allen-Bradley) "RSView 32" SCADA software. <br />The SCADA software provides a graphic interface showing process conditions, alarms and historic <br />trending. The computer hardware and software products were of good quality when they were installed <br />14-18 years ago, but advances in computer operating systems and numerous SCADA software revisions <br />have left the existing system obsolete. The Allen-Bradley PLCs that were installed in the original projects <br />Page 1 of 18 <br />