AgdaPkt 2013-01-28 - Laserfiche WebLink

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6.1.C. - Page 1 RE PO RT To the Honorable Mayor and City Council From the Cit Mana er January 28, 2013 SUBJECT Award of Contract — 2011-2012 Sewer Rehabilitation Project RECOMMENDATION Approve, by motion, the contract documents and award the standard form contract for the 2011-2012 Sanitary Sewer Rehabilitation Project to Andes Construction, Inc. of Oakland, California for their responsive and responsible low bid of $1,212,120.00 and authorize the City Manager to increase the contract amount, if necessary, up to 10% of the amount awarded, not to exceed $1,333,332.00. 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, staff has employed closed circuit television inspection services (CCTV) to better assess the condition of the system. CCTV technology helps to identify pipe defects such as cracks, offset joints, and root intrusion that can be remediated before a service failure. These inspections ensure a fully functioning system as defects in the sewer collection system are identified and mitigated. 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 have been evaluated by staff to determine the most cost-effective method of mitigation. The trenchless CIPP techniques have been chosen to minimizes disruption to residents and results in a cost-effective project. This project was designed in Fiscal Year 2011/2012. The construction has been delayed due to rebidding of this project. 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 will rehabilitate approximately 10,482 linear feet of sewer main. Cured-in-place-pipe (CIPP) trenchless technology methods will be used for the rehabilitation work. Some pipe defects, particularly those resulting in pronounced misalignment will be excavated and repaired.