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9 THE CITY OF L£�S�4NTONO CITY COUNCIL AGENDA REPORT December 6, 2022 Engineering TITLE: APPROVE A PROFESSIONAL SERVICES AGREEMENT WITH MARK THOMAS IN THE NOT-TO-EXCEED AMOUNT OF $524,145 FOR THE 35 PERCENT DESIGN SERVICES FOR THE WEST LAS POSITAS BOULEVARD MULTIMODAL RECONSTRUCTION PROJECT, CIP NO. 11514 SUMMARY West Las Positas roadway has a history of soil settlement and differential movement that has created an uneven roadway surface and localized roadway failures. Over the years, the City has implemented several maintenance repairs projects and geotechnical investigations to remediate the uneven roadway that is experiencing pavement distress and/or settlement. These repairs have provided a short-term fix; however, they have not lasted as long as anticipated and the roadway between Hopyard Road and Stoneridge Drive now requires full reconstruction. On November 15, 2022, the City Council reviewed and adopted the West Las Positas Boulevard Bicycle and Pedestrian Corridor Improvement Plan and authorized the implementation of a Phase 1 "quick build" between Hopyard Road and Hacienda Drive. The plan outlined the design concept for the corridor, and the basis of design will incorporate both the recommendations from BSK Associates' geotechnical study and the condition assessments from a CCTV (closed circuit television) inspection of the utilities. The design will include improvements from Foothill Road to Fairlands Drive. A 35 percent design is necessary to provide a sufficient level of detail to identify major engineering challenges and all required traffic signal, sewer, water, storm and dry utility work, as well as the costs for and schedule of the project. While the cost to construct the improvements between Foothill Road and Fairlands Drive is anticipated to exceed the available funding, creating a 35 percent design for the entire length assists with identifying segments of the corridor that can be separated and prioritized which will aid in the development of a phased plan of construction. Roadway segments outside of the full reconstruction area from Hopyard Road to Stoneridge Drive will include updated quick-build options and pricing. The 35 percent design and cost estimates are anticipated to be presented to the City Council in summer 2023, along with a recommendation on how to best phase/implement the project based on available funding. The staff recommendation will include approval of an amendment to the Mark Thomas agreement for the firm to complete biddable construction documents for only the first phase of project implementation.