R2002-100 ACCEPTING THE BID AND AUTHORIZING A CONTRACT

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COUNCIL COMMUNICATION FORM Engineering & Infrastructure Memorandum NO. 2002-27 May 24, 2002 TO: Honorable Mayor Howley and City Council FROM: Steve Garman, City Manager Stephen Swanson,P.E., Director of Engineering & Infrastructur� Matthew C. Newell, �.E., City Engineev,Nyj SUBJECT: Knollwood Drive Street Reconstruction City Project 2001-34 SUMMARY RECOMMENDATION: It is recommended by staff that the City Council approve the attached resolution awarding the contract for Knollwood Drive Street Reconstruction, City Project 2001-34, to Entler Excavating Co., Inc., in the amount of$137,338.05, and that the Mayor be authorized to execute the contract, and the City Clerk to attest. BACKGROUND: The pavement restoration work needed on Knollwood Drive is beyond the scope of standard pavement rehabilitation methods. Total street reconstruction is proposed for the street. This will consist of the removal and replacement of the Portland Cement Concrete (PCC) pavement, curb and gutters, driveways, etc. The reconstruction will include significant drainage work to route storm runoff from the pavement surface and attempt to intercept high ground water in the area. This project was proposed with two alternate pavements, asphalt concrete (Alternate #1) and PCC (Alternate #2). For this project, the PCC alternate is considered by staff to be the better pavement cross section and is the preferred alternate when favorable bids are received. The reasoning that suggests the PCC alternate to be preferable is that, in this instance, the pavement section is structurally stronger than the asphalt alternative. This means that it is likely that the pavement will last longer under the expected loads and require less maintenance. It is reasonable to expect that the asphalt alternate will require more extensive maintenance over its life than will the PCC pavement. In comparing the low bids for each alternate, the PCC alternate is approximately $8,000 more than the asphalt alternate. The maintenance and restoration savings expected with the PCC pavement will more than make up for the added initial construction cost.