R2006-03 ACCEPTING THE BID AND AUTHORIZING A CONTRACT

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� �; COUNCIL COMMUNICATION FORM Engineering & Infrastructure Memorandum NO. 2006-01 January 5, 2006 TO: Honorable Mayor Osborne and City Council FROM: Steve Garma ity Manager ' Stephen Swa n, P.E.,Director of Engineer�ng & Infrastructure Matthew C. N well, P.E., City Engineery�j((��/� Douglas R. Nooden, P.E.,Assistant City Engineer�.�2.+J SUBJECT: Sanitary Sewer Trenchless Point Repairs, City Project OS-29 SUMMARY RECOMMENDATION: It is recommended by staff that the City Council approve the attached resolution awarding the contract for Sanitary Sewer Trenchless Point Repairs, City Project OS-29, to Tele Scan, Inc., as the lowest, responsible bidder in the amount of$78,460.00, and that the Mayor be authorized to execute the contract, and the City Clerk to attest. BACKGROUND: The purpose of this project is to repair structural deficiencies of the sanitary sewer system with a minimum of disturbance to service. Structural deficiencies include broken and missing pieces of pipe, heavily 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 flexible lining through a manhole to the location of the damaged section of pipe. Once the lining is in place, it is re-formed to fit tightly against the walls of the host 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 host pipe. During this process, excess resin is forced into cracks,joints and irregularities of the host pipe, resulting in an effectual bond between new and 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 of the previous year's Trenchless Point Repair Project, which was performed by Tele Scan, Inc. Unit prices as shown in the attached bid tabulation reflect generally inflated prices due to the higher mobilization costs associated with a smaller project. The current project is significantly smaller in scale as compared to last year's project. Tele Scan's unit prices did not change from last year. Being a local contractor as well as the City's current sewer televising contractor, Tele Scan is familiar with the local sewer system and does not have the high mobilization costs associated with out of town firms.