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City of Missoula, Montana Item to be Referred to City Council Committee Committee: Public Works Committee Item: Engineering Amendment No. 1 to the Reserve Street Sewer Main Replacement (Site ID 184) Project Date: May 6, 2010 Prepared by: Kevin Slovarp, City Engineer Initiated by: Kevin Slovarp, City Engineer Action Required: Approve and authorize the Mayor to sign Amendment No. 1 with HDR, Inc. for additional engineering design and construction services for the Reserve Street Sewer Main Replacement Project in the amount of $9,938.31. Recommended Motion: The committee recommends the City Council approve and authorize the Mayor to sign Amendment No. 1 with HDR, Inc. for additional engineering design and construction services for the Reserve Street Sewer Main Replacement Project in the amount of $9,938.31. Timeline: Referral to committee: May 10, 2010 Committee discussion: May 12, 2010 Background and Alternatives Explored: All work for the project has been completed at this time. The original reinforced concrete pipe that was failing structurally from the presence of hydrogen sulfide gases has been replaced by PVC pipe that is resistant to the corrosive gases. This main replacement project has corrected the groundwater infiltration issue. Therefore, the wastewater treatment plant is no longer treating the groundwater that was infiltrating into the system from the previously corroded pipe. The majority of the additional engineering work included replacement of existing corroded manholes. Financial Implications: Wastewater R & D funds will pay for the additional engineering design and construction services by HDR, Inc. Attachments: Amendment No. 1