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CR 96-164 RCM Plans And Purchase SCADA• • October 11, 1996 Overview. Primary Issues to Consider Supporting Information Council Report: 96 -164 APPROVAL OF PLANS FROM RCM, INC. AND ORDER BIDS FOR THE PURCHASE OF A SUPERVISOR CONTROL AND DATA ACQUISITION (SCADA) SYSTEM Proposed Action. Staff recommends adoption of the following motion: "Move that the Council approve plans and order bids as they relate to the purchase and construction of a Supervisor Control and Data Acquisition System ( SCADA)." A SCADA system is a computer -based monitoring and control system. This project will upgrade our existing water and sewer control system. The current system relies on phone company lines for transmission of control data from the city Public Works Facility to the various sites in the city that it controls. The phone lines have in the past been • unreliable and are very costly to rent. The current controls were installed in 1977 -1978 and repairs to the system are very difficult due to the unavailability of parts. The new system will use computer generated commands transmitted over a new radio system which should be more reliable and easier to service than the present system. With this purchase the city will bring our control system up to speed with the new technology of the future. o Summary of Proposal o Project Funding and Schedule o Analysis of Issues o Kaeding and Associates letter Xi Mich el G. Lauseng, Util ty Superintendent Analysis of Issues III 0 • Council Report: 96 -164 Page 2 Summary of Proposal Kaeding and Associates, Inc. letter outlines the scope of what the project involves and its estimated costs. Those costs are estimated at approximately $400,000. The project budget in 1994 was $141,500. The original scope of the project has remained the same. The difference is that with a completed set of plans we were able to submit them to the contractors that install these systems and get a more accurate cost. The cost for the programming and the software that supports the system have increased dramatically in the last two years which are reflected in some of the increased costs. Also included are higher installation prices that we didn't factor in to the original estimated costs. Benefits and savings from this project are as follows: o Increased reliability of the radio communication, and the cost savings from not having to pay for the expensive phone lines o The ability to use the ground storage portion of the water town at the Well 11 site on a daily basis. o The cost savings of using the new efficient pumps at Well 11 to lower our NSP costs. o The ability to monitor the system on a lap top computer from the operators home, and be able to correct some of the problems without having to come in o The ability to put more of our facilities on the cost saving "time of day" program that NSP offers. o Project Funding and Schedule The project is waiting to receive the radio frequency assignment and as soon as that arrives the project will be bid. The projected time table is to bid this project this year and install it in the first part of 1997. The funding of this project is as follows: WATER FUND: $220,000 SEWER FUND: $180,000 The project is included in the current CIP as a 1996/1997 project. Kaeding and Associates, Inc. 7300 France Avenue South Suite 330 Minneapolis, Minnesota 55435 (612) 831-0317 (612) 831 -2179 Fax • • September 30, 1996 City of Hopkins Attn: Mr. Steve Stadler 1601 Second Street South Hopkins, Minnesota 55343 Re: Hopkins, Minnesota Water / Wastewater SCADA System Dear Mr. Stadler: This letter serves as an overview of the water SCADA system designed for the City, and answers several questions presented at our recent meeting. This design effort supports RCIvPs continuing work in the City. The term "SCADA" stands for system control and data acquisition. The term accurately describes what the system will do. The system will use a unit at City Hall as the master, but the two workstations that serve as the "window" into the system are located at the Public Works building. The following elements are included in the system: Wastewater Litt Station Monitoring The system will monitor the five existing lift stations for high wetwell level, low temperature, and intrusion, and will monitor the pumps to accumulate pump running time. Pump running time is a key element. Pump wear or a plugged pump will significantly increase the operating time. Running time will be conveyed back to the Public Works building where it can be monitored. Panels will also be included for lift stations #5 and #6 When these stations are rehabilitated, the panels can be installed. The system will also monitor for signal loss, which will indicate a power or equipment failure. Because radio signal strength from stations #1 and #2 is marginal, telephone telemetry is a candidate at these stations. Blake Tower /Moline Plant: Telemetry panels will be installed at Blake Tower and the Moline Plant. The level in the Blake Tower will be telemetered to the master and on to the Public Works building. Operation of the Moline Plant and standpipe can be monitored and controlled from the workstations. Low temperature, flooding and intrusion alarms are being added at these locations. Water Plant #4: Water Plant #4 will have a new control system. Backwashing of the filters at this plant has never been automated, but will be. The existing control system for the wells and high service pumps is old. The reliability of the system is decreasing and the manufacturer no longer supports the equipment. This entire control system will be replaced. As a result, well pump control, chemical control, chlorine lb City of Hopkins Attn: Mr. Steve Stadler September 30, 1996 Page 2 addition, high service pump control, and backwash control will be automated. All of these parameters and processes can be monitored and controlled from the workstations. Low temperature, intrusion, flooding, and valve misoperation are being monitored. These functions have not been controlled in the past. To control cost, the existing valves, actuators, and feedback transmitters are being retained. It is believed that all are operational. However, when the valves are taken out of service and examined during construction, some of these components may need to be replaced. Similarly, high service pump controlled check valves, solenoid valves, and related components are being reused. Most pressure transmitters are being replaced and new current -to- pneumatic converters are being installed. Workstations: The project includes two personal computer based workstations at the Public Works building with printers. The printers include two alarm printers and one report printer. In addition, one laptop computer is being furnished. This laptop will allow an on -call operator to access the system from home. In the event of an alarm, the instrumentation system will notify the operator via a City procured paging system. When the operator receives the page, he /she can access the system via the laptop using a telephone circuit. The operator can then determine where the problem is and its nature. Appropriate action can then be initiated. The system is estimated to cost approximately $400,000. This is an engineering estimate that will depend on several variables including the construction schedule, how busy the potential bidders are, how busy the equipment suppliers are, and other factors. In order to keep the project "moving ", but not establish such an aggressive schedule that the cost will suffer, an eight month construction schedule is recommended. We, along with our associates at RCM, appreciate your patience and look forward to implementing the bidding and construction of this significant improvement to the City's infrastructure. We trust this answers your questions. If you have additional questions, please contact me, Mr. Folen, or Mr. Roskopf at your convenience. ly, a "lCaeding aeding and Associates, Inc. PFK:mj cc: Mr. Dale Folen / Rieke Carroll Muller Associates, Inc. Mr. Mike Lauseng / City of Hopkins Mr. Robert Roskopf / Rieke Carroll Muller Associates, Inc.