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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. DISCUSSION The West Las Positas Boulevard Bicycle and Pedestrian Corridor Improvement Plan outlines the design concept for the corridor improvements from Foothill Road to Fairlands Drive and provides direction on how to develop a multimodal corridor. It defines the lane lines, pedestrian areas, and intersection improvements. BSK's study identified the necessary repair strategies to address the differential settlement of the roadway between Hopyard Road and Stoneridge Drive and provide a long-term solution. The CCTV inspections of the sewer and storm drain systems provided an assessment identifying the condition of the systems. The West Las Positas Boulevard Bicycle and Pedestrian Corridor Improvement Plan included a phasing plan to implement the quick-build concepts and will follow up with permanent improvements when the road segments have received major reconstruction. The quick-build phase within the anticipated full reconstruction areas will be skipped, with the exception of the Phase 1 area between Hopyard Road and Hacienda Drive, which will be a pilot program. This area will help work through design challenges, provide feedback from the community, and allow for improvements in the design. BSK's report identified that the primary repair strategy for the severely impacted areas is to chemically stabilize the soils under the roadbed with a lime/cement treatment to reduce the shrinking and swelling properties of the soil. This is accomplished by the removal of the top five feet of soil and then reconstructing the roadway with treated soil and salvaged roadbed materials. In addition, utility trenches along the perimeter of the roadway will be similarly treated to stop the transmission of water along the trenches. The trees in the center medians will need to be evaluated for replacement and new landscaping will need to be installed with moisture/root barriers extending a minimum of three feet below the roadbed surface. As part of the scope of work, the designer will have an additional geotechnical engineer review BSK's recommendations and aid in the development of the plans. BSK will continue to be a part of the project by reviewing plans and new information as identified during the design process. The storm and sewer lines between Hopyard Road and Stoneridge Drive were inspected via CCTV to evaluate the conditions of the lines and determine if the road failure was attributed to failed sections of the system. The storm drain system is generally ranked in good condition and was not identified as a cause of failure to the roadway. The sewer system generally ranks in fair condition and was not identified as a cause of failure of the roadway. The project will include reviewing the CCTV and identifying repairs to any localized deficiencies of the storm and sewer systems. The water main is in a good condition as the majority of the service laterals and fire hydrant lines have recently been replaced. Any remaining lateral lines that have not been updated will be replaced. 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 and schedule of the project. While the cost to construct the Page 3 of 5