R2009-193 ACCEPTING THE BID AND AUTHORIZING A CONTRACT

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Public Works Memorandum NO. 2009-94 DATE: September 28, 2009 TO: Honorable Mayor McElroy and City�ouncil Members FROM: Ryan P. McCrady, City Manager �" / Richard G. Marley, P.E., Public Works Director �1,�� SUBJECT: 2009 Sanitary Sewer Trenchless Point Repairs, City Project 09-29 SUMMARY RECOMMENDATION: Staff recommends that the City Council approve the attached resolution approving a contract in the amount of$226,487 for 2009 Sanitary Sewer Trenchless Point Repairs (City Project 09-29) to Midwest Trenchless Technology, Inc., as the lowest responsible bidder and that the Mayor be authorized to execute the contract and the City Clerk to attest. PRIOR COUNCIL ACTION: March 28, 2009 - The City Council reviewed the FY 2009-10 Capital Improvements Plan (CIP) in Study Session. The CIP allocated funds for this work. July 20, 2009 — Council did not approve Resolution R2009-57 which would have approved a contract in the amount of$258,073.81 with National Power Rodding Corporation of Chicago, IL for the Sanitary Sewer Trenchless point repair project. Staffwas directed to re-bid the project BACKGROUND: Trenchless Point Repair Process The purpose of this project is to repair structural deficiencies in the sanitary sewer system with a minimum of disturbance to sanitary service and without excavation of the pipe. 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 and videos. The trenchless process involves the insertion of a resin saturated flexible liner through a manhole to the location of the damaged section of pipe. Once the liner is in place, it is pressed by inflating a rubber bladder to fit tightly against the walls of the existing pipe. The liner is then heated to activate a resin system, causing the pipe lining to cure and form a new structural pipe within the existing pipe. During this process, excess resin is forced into the cracks,joints and irregularities of the existing pipe, resulting in a secure bond between the liner and the old pipe. When curing is complete, lateral lines are re-opened using a remote controlled cutting tool. Unit prices for the Engineer's estimate were derived from the unit prices from previous trenchless point repair projects and contractors. Page � 1