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REQUEST FOR <br />COUNCIL ACTION <br />CITY COUNCIL MEETING DATE: <br />NOVEMBER 15, 2010 <br />TITLE <br />REQUEST FOR PROPOSALS FOR <br />CONSTRUCTION MANAGEMENT <br />SERVICES FOR THE FIRST STREET <br />BRIDGE REPLACEMENT OVER THE <br />SANTA ANA RIVER ( 061723) <br />CITY MANAGER <br />RECOMMENDED ACTION <br />CLERK OF COUNCIL USE ONLY: <br />APPROVED <br />❑ As Recommended <br />❑ As Amended <br />❑ Ordinance on 1St Reading <br />❑ Ordinance on 2 "d Reading <br />❑ Implementing Resolution <br />❑ Set Public Hearing For <br />CONTINUED TO <br />FILE NUMBER <br />Authorize the Public Works Agency to send Request for Proposals to qualified consulting firms to <br />provide construction management services for the First Street Bridge Widening over the Santa <br />Ana River project. <br />DISCUSSION <br />The First Street Bridge over the Santa Ana River currently consists of two travel lanes in each <br />direction but the street leading onto the bridge has three lanes. During rush hour, the bridge <br />becomes a bottleneck that severely impedes traffic flow. To improve the situation, plans and <br />specifications have been prepared to widen the bridge to three lanes in each direction with <br />pedestrian sidewalks on both sides. <br />The proposed work includes demolishing the existing bridge and rebuilding the new bridge from <br />the foundation up. Field investigation indicated that the east/west bound bridge consists of two <br />independent structures, which are structurally separated along the longitudinal center line. In light <br />of this finding, the widening work will be conducted in two phases. In the first phase, traffic will be <br />directed to the south half of the bridge while the north half will be demolished and rebuilt. The <br />second phase of the project will start immediately following completion of the first phase. Traffic in <br />this phase will be directed to the newly completed north half of the bridge during rebuilding of the <br />south half. <br />The construction cost is estimated at $10.5 million. The award of a construction contract is <br />expected to take place in March 2011. Construction is expected to last for 12 months and during <br />this time, traffic will be reduced to one lane for each direction. To mitigate the impact, changeable <br />message signs will be set up prior to construction, alerting drivers to use alternate streets. Traffic <br />signal timing will also be reset according to the traffic volume. <br />Bridge construction is a highly specialized field. To ensure safe and high quality construction, staff <br />recommends retaining a construction management firm with experience in bridge work to manage <br />19G -1 <br />