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seals at Abutments 1 and 4; and reinstalling the architectural treatment on the barriers. 4. West Las Positas Boulevard Bridge at G-3 Channel (Br No. 33C-0461) The scope of work for this bridge included epoxy injection of cracks and repairing spalls in the concrete culvert cells. 5. Owens Drive Bridge at Chabot Channel (Br No. 33C-0462) The scope of work for this bridge included epoxy injection of cracks and repairing spalls in the concrete culvert cells. On June 16, 2020, City Council awarded a contract in the amount of$1,358,864 to the lowest bidder, California Engineering Contractors, Inc., for the Bridge Improvements at Various Locations Project, CIP No. 16514 — Fed ID 5101(029), and authorized the Director of Engineering to negotiate and approve change orders up to the budgeted project contingency amount of $136,000. In addition, City Council approved various consultant support contracts for material testing and inspection services that were necessary to complete the project. (Attachment 1 lists all project expenditures.) Construction began in July 2020. On November 17, 2020, City Council allocated an additional $188,000 in contingency to the Bridge Improvements at Various Locations Project, CIP No. 16514 — Fed ID 5101(029), to fund several change orders for work associated with various unforeseen conditions that were in the process of being negotiated by the Director of Engineering. The allocation was in addition to the $136,000 originally budgeted in the project contingency. Four primary issues prompted the staff request for additional contingency funding: 1. Adding a sixth construction phase to the schedule to safely implement traffic control; 2. Additional crack repair by epoxy ejection that exceeded the estimated quantity; 3. Required water pipeline and valve modifications due to differing field conditions associated with the existing pipeline compared to record drawings; and 4. Additional street paving required under this project. A city paving contractor planned to pave in close proximity to the Santa Rita Road Bridge but could not complete the work due to a conflict with this project's schedule extension for change order work. Also, the asphalt that was to be removed and replaced from the Santa Rita Road Bridge deck as part of the project was much thicker than anticipated. In addition to increasing the project contingency on November 17, 2020, the Council authorized the Director of Engineering to continue with the negotiations on the above items and any other items that might arise, and approve project change orders up to a new not-to-exceed total contingency amount of$324,000. Page 4 of 6