R2009-194 ACCEPTING THE BID AND AUTHORIZING A CONTRACT

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�t * . Public Works Memorandum ' NO. 2009-95 DATE: September 24, 2009 TO: Honorable Mayor McElroy and City C uncil FROM: Ryan P. McCrady, City Manager � Richard G. Marley, P.E., Director of Public Works �'s�/�L.� , � . �' SUBJECT: 2009 Trenchless Long Lining Repairs, City Project 09-28 � SUMMARY RECOMMENDATION: Staff recommends that the City Council approve the attached resolution approving a contract in the amount of$409,565.60 for 2009 Trenchless Long Lining Repairs, City Project 09-28,to Insituform Technologies USA, Inc. as the lowest qualified bidder and that the Mayor be authorized to execute the contract and the City Clerk to attest. PRIOR COUNCIL ACTION: The City Council approved the FY 2009-10 Capital Improvements Plan which included an allocation of funds for this project. BACKGROUND: The purpose of this project is to repair structural deficiencies in the sanitary and storm sewer system with a minimum disruption to service and disturbance to the surface. Structural deficiencies include broken and missing pieces of pipe, offset pipe joints and voids. All of the project locations were derived from the annual televising inspection reports. The trenchless long lining process involves the insertion of a resin saturated flexible lining from manhole to manhole to repair the damaged pipe. Long lining differs from the point lining because point lining repairs only repair a few feet around a damaged area of pipe, whereas long lining the pipe repairs the entire pipe segment from manhole to manhole. Long lining is more cost effective on pipes that have many structural deficiencies or significant damage. Once the lining is in place, it is pressed to fit tightly against the walls of the sewer pipe by either water or air pressure. The liner is then heated to activate the resin system, causing the pipe lining to cure, and form a new structural pipe within the sewer pipe. During this process, excess resin is forced into cracks,joints and irregularities of the host pipe, resulting in a bond between new and old pipe. When curing is complete, lateral lines are re-opened using a remote controlled cutting tool. The 2009 Trenchless Long Lining Repairs Project will line approximately 11,000 lineal feet of 8", 10", 12", 15", 18" and 21" sanitary sewer. The project also includes lining approximately 225 lineal feet of 12" and 36" storm sewer that have structural deficiencies which are difficult to replace if a failure would occur. Page � 1