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Page 3 of 5 Avenue (approximately 1,600 linear feet) to increase the capacity of the existing 12-inch line running south over the bridge on Bernal Avenue to meet current and future demands. The additional flows to meet demands increases the velocity in the existing 12-inch pipe over three times the recommended velocities, which leads to premature pipeline failure and water quality issues. Due to the time needed to permit a new line over Bernal Bridge and Arroyo del Valle, an existing sewer line that has not been put into service will be repurposed until the new water line can be installed on the bridge. The existing sewer line piping will be removed from the casing on the bridge and replaced with a new higher-pressure rated pipe that will meet the potable water system pressures. The water line bridge crossing will need to be installed when the sewer line is put in service in the future. Improvements to Turnout No. 1 include replacing the internal piping, flow meter and control valve and installing a pressure-regulating valve to protect the turnout and update the facility to current standards. In addition, vault repairs to address corroded rebar, and the installation of a flushing and sampling hydrant, are included in the project. These improvements are necessary to ensure the reliable and long-term operation of the turnout. Bids Sealed bids for this project were received on December 11, 2023. Six bids were received, ranging from the low bid amount of $1,644,000 to the high bid amount of $2,388,639.68. The low bid amount, submitted by Golden State Construction & Utility, Inc. is approximately 9.6 percent above the Engineer's Estimate of $1.5 million (see Attachment 1). Staff reviewed bids and found the low bid responsive and responsible. Past work performed by the low bidder was verified to be satisfactory and the contractor’s current City work for CIP No. 24278 is progressing as anticipated. Staff recommends awarding the construction contract to Golden State Construction & Utility, Inc. Consultant/Specialty Services Installation of the new pipeline will require the removal and replacement of an estimated 15 traffic signal loop detectors. Loop replacement will be performed by the City’s on-call traffic signal maintenance contractor for an estimated cost of $7,500. Due to lead time for the specialty equipment, the City’s on-call suppliers were utilized to provide a motorized control valve, pressure-reducing valve and flow meter for installation in Turnout No. 1 by the construction contractor. The estimated cost for the valves and meters is $100,000. Staff recommends an increase of $100,000 to the existing $300,000 Purchase Order 2024001 with Core and Main LP, which was approved by the City Council on June 20, 2023, for the purchase of utility infrastructure materials. The additional authorization avoids impacting scheduled repair and replacement work. An estimated $15,000 of construction support services, including the review of the contractor’s submittals and requests for information, will be provided by the project’s designer, Pakpour Consulting Group. An estimated $20,000 of materials testing services will be provided under the City’s existing on-call materials testing contracts. These services include required testing of the materials used for backfill and compaction of the trenches associated with the pipeline installation. Specialty instrumentation and electrical control work that connects to Zone 7’s equipment for Page 177 of 201