R2012-151 AUTHORIZING CHANGE ORDER NO. 1, BURDICK PLUMBING & HEATING COMPANY, INC.

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Public Works Memorandum NO. 2012-57 DATE: July 17, 2012 TO: Honorable Mayor McElroy and City Council FROM: Ryan P. McCrady, City Manager Richard G. Marley, P.E., Public Works Director Keith D. Alexander, Director of Water Management SUBJECT: Resolution Approving Change Order No. 1, Burdick Plumbing& Heating Company, Pressure Reducing Valve Installation City Project 2011-05 SUMMARY RECOMMENDATION: It is recommended that the City Council approve the attached resolution authorizing December 31, 2012, as the completion date for the Pressure Reducing Valve Installation project, City Project 2011- 05, and that the Mayor be authorized to execute the contract and the City Clerk to attest. PRIOR COUNCIL ACTION: Appendix A provides a summary of prior Council actions related to the pressure reducing valve project. BACKGROUND: South Pressure Zone When the new elevated water storage tank on South Franklin Street Road was filled during the summer of 2011, City water customers south of the Lake became a part of a new pressure zone that is approximately 10 pounds per square inch (psi) higher than they experienced previously. The new pressure zone improved the reliability and consistency of water pressure for the south side of the City. It also has increased the amount of water available for the Fire Department to use in suppressing fires. Depending on the elevation and plumbing condition of some buildings, some water pressures may exceed 80 psi which is the maximum limit for normal residential water pressures. The Illinois Plumbing Code requires a pressure reducing valve to be installed on services that may exceed the maximum water pressure to assure it is at or below 80 psi. In 2011, the City reviewed property elevations south of the lake and identified buildings at or below 655 feet in elevation may exceed the 80 psi maximum. Using the elevation capabilities of the City Geographical Information System(GIS), over 800 water customers were identified as being at or below the elevation of 655 feet. As work progressed on the pressure reducing valve installation project all residents were notified by mail and other means encouraging them to schedule an inspection to possibly install a pressure reducing valve. Since the Illinois Plumbing Code requires the installation of pressure reducing valves, it is mandatory that customers allow access to the contractor for this work. To date, 67 water customers have been unresponsive to the City and the contractor. The City will begin sending final notices to unresponsive customers requiring access for inspection and possible valve installation or face disconnection from the City's water system. Page I 1