AgdaPkt 2012-09-24 - Laserfiche WebLink

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6.1.B. - Page 1 RE PO RT To the Honorable Mayor and City Council From the Cit Mana er September 24, 2012 SUBJECT Rejection of Bids — 2011-2012 Sewer Rehabilitation Project RECOMMENDATION By motion, reject all bids and direct the return of bid security for the 2011-2012 Sewer Rehabilitation Project. BACKGROUND The city systematically replaces sections of aging sewer infrastructure to ensure the continued reliability of the system. Each year, staff identifies pipelines that require excessive maintenance or experience repeated service disruptions and target those pipelines for improvement. Since 2007, closed circuit television inspection services (CCTV) are used to assess the condition of the system. CCTV technology helps identify pipe defects such as cracks, offset joints, and root intrusion that can be remediated before a service failure. These inspections are part of a comprehensive program to ensure a fully functioning system, as defects in the sewer collection system are identified and mitigated. The 2011-2012 Sewer Rehabilitation Project includes rehabilitation of pipe segments in the sewer basin bordered by Woodside Road, EI Camino Real, Encina Avenue, and Oakwood Drive. This project is designed to rehabilitate approximately 10,482 linear feet of sewer main. Cured-in-place-pipe (CIPP) trenchless technology methods are proposed for the rehabilitation work. Traditional open trench excavation is proposed for manhole and sewer lateral replacement. Some pipe defects, particularly those resulting in pronounced misalignment require excavating to be repaired. ANALYSIS CCTV inspection of Sanitary Sewer Basin No. 8 was completed in 2011. Staff's review of the inspection videos revealed numerous pipeline defects in this sewer basin. A number of construction options for repair/replacement, including traditional open trench and trenchless CIPP technique were evaluated by staff to determine the most cost- effective method of mitigation. The trenchless CIPP techniques produce the most cost- effective project with the least disruption to service and roadway conditions. Ten (10) general contractors purchased the plans for the project. However, only two (2) bids were received at the bid opening on August 29, 2012 and are summarized below.