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The scope of work for this bridge includes 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 (should the need arise during construction) 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 are necessary to complete the project. (Attachment One lists all project expenditures.) Construction began in July 2020. DISCUSSION There have been five change orders for extra required work on the project issued by the Director of Engineering since the beginning of construction. The five change orders total $53,278 in aggregate, leaving an available balance of $82,722 in the budgeted $136,000 project contingency. The changes to date include the requirement to add a sixth phase of construction to the Santa Rita Road bridge to safely handle traffic during construction, and various other relatively minor items, including some credited items, due to unforeseen conditions discovered during construction. This is proving to be a very complicated project with a lot of additional but necessary work. City staff, working with the contractor, identified that there will potentially be ten more change orders issued before the project is complete. The ten additional change orders are estimated at this time to cost an aggregate total of approximately $231,000. Since there is only $82,722 remaining in the budgeted project contingency, it is estimated that the current shortfall will total approximately $148,000. In addition, since approximately 35 percent of the project work remains, and change orders are under negotiations to be completed, staff believes that an additional $40,000 should also be allocated to the project budget to cover any more items or work found to be necessary. Therefore, it is recommended that City Council allocate a total additional $188,000 to the project budget and authorize the Director of Engineering to negotiate and approve change orders determined to be necessary up to the $324,000. ($188,000 in addition to the original authorization of $136,000.) There are many minor changes that have to be addressed during construction, but there are four significant changes that resulted from unforeseen-yet-necessary conditions that require the additional allocation. Attachment 2 is a complete change order list, including the approved and potential change orders. The four significant change orders are discussed below. 1. Additional Phase of Construction at Santa Rita Road and Arroyo Mocho (Change Order No. 1) The project plans identified three phases of construction work for the northbound lanes of Santa Rita Road at the bridge in order to safely handle traffic during the work. Only two phases of construction were identified in the project plans for the southbound Santa Rita Road work based on the cross-section of the roadway near the bridge. When reviewing the traffic control plans submitted by the contractor for Page 4 of 7