R2010-172 ACCEPTING PRICE QUOTE AND AUTHORIZING CONTRACT

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< •F PUBLIC WORKS MEMORANDUM NO. 2010-50 DATE: September 1, 2010 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: Garfield Avenue Water Main Repair SUMMARY RECOMMENDATION: It is recommended by staff that the City Council approve the attached resolution which authorizes the Mayor to execute, and the City Clerk to attest to, a proposal from Insituform Technologies USA, Inc. to repair the 16" water main along Garfield Avenue and extending under the Canadian National rail yard. The resolution authorizes expenditures for the work in an amount not to exceed $165,675. PRIOR COUNCIL ACTION: There has been no previous council action on this repair. BACKGROUND: A 16" water main extends from the Garfield Avenue Water Tank, under the Canadian National rail yard, between Martin Luther King, Jr. Drive and Jasper Street (see Figure 1 attached). The main was installed in 1949 and is currently leaking under the rail yard with water rising to the surface. The full extent of the damage is unknown but with the leak appearing to be under the multi-track switching yard, the potential for significant damage exists were the main to fully rupture as recently occurred on South Side Drive or 1500 West Macon Street. City staffspent a considerable amount oftime reviewing repair options since the depth and location of the water main make access extremely difficult. The best approach to repair the main is to utilize a cured-in-place liner similar to a repair currently planned for a 12" water main in the 1500 block of West Macon Street. This work is being subcontracted to Insituform Technologies of St. Louis, Mo., which appears to be the only firm in the area that has the capability and experience necessary to line a 16" water main. City staff approached Insituform to provide a proposal to line the Garfield Avenue water main. Cured-in-place lining of water mains is a relatively new procedure based on technology that has been used for many years in sanitary sewers. A fabric tube is saturated with resin and pulled through the water main where it is inflated against the old pipe while the resin hardens to form a new pipe within the old water main. This method of rehabilitation results in a new pipe that is installed with limited excavation and minimal disruption to above ground facilities. The work will entail excavating to expose the damaged water main at both sides of the rail yard. The pipe will be Page � 1