MARK THOMAS & COMPANY - FOURTH AMENDMENT (#2023416)

Page 1 of 4 Item #5 CITY COUNCIL AGENDA REPORT November 4, 2025 Community and Economic Development TITLE: AUTHORIZE THE CITY MANAGER TO ENTER INTO A FOURTH AMENDMENT TO THE PROFESSIONAL SERVICES AGREEMENT WITH MARK THOMAS & COMPANY, INC., FOR AN ADDITIONAL $999,954, FOR A NEW TOTAL CONTRACT AMOUNT OF $3,995,644, TO COMPLETE 100 PERCENT DESIGN FOR PHASE 2 OF THE WEST LAS POSITAS MULTIMODAL RECONSTRUCTION PROJECT (OWENS DRIVE TO SANTA RITA ROAD, CIP NO. 26514) SUMMARY On December 6, 2022, the City Council awarded an agreement to Mark Thomas & Company, Inc. (Mark Thomas) to provide detailed design and construction documents for Phase 1 of the West Las Positas Multimodal Reconstruction Project (from Hopyard Road to the Iron Horse Trail). Phase 2 of the West Las Positas Multimodal Reconstruction Project extends the improvements from the Iron Horse Trail/Owens Drive to Santa Rita Road. On August 19, 2025 the City Council authorized the City Manager to execute a project funding agreement with Alameda County Transportation Commission (ACTC) to receive a $750,000 grant to complete the design and construction documents for Phase 2 of the Project. Staff requests that the City Council authorize an Amendment to the Professional Services Agreement with Mark Thomas to complete this work. The grant award requires a 25 percent local match; the City’s Direct Local Distribution of Measure BB Pedestrian and Bicycle Funds is proposed to be used to provide the $250,000 match, covering the total $999,954 estimated cost of the amendment to prepare the Phase 2 design and construction documents. RECOMMENDATION Authorize the City Manager to issue the Fourth Amendment to the Professional Services Agreement with Mark Thomas & Company, Inc., for an additional $999,954, for a new total contract amount of $3,995,644, to complete 100 percent design for Phase 2 of the West Las Positas Multimodal Reconstruction Project (Owens Drive to Santa Rita Road, CIP No. 26514). BACKGROUND West Las Positas Boulevard is a key east-west arterial roadway and a critical connection for the city’s bicycle, pedestrian, and transit networks, providing a primary link from residential neighborhoods to regional trails, schools, retail, and office land uses. The portion of the road between Hopyard Road and Stoneridge Drive was constructed in the early 1980s as part of the development of the Hacienda Business Park. West Las Positas Boulevard has a history of soil settlement and differential movement within the Hacienda Business Park, resulting in uneven roadway surfaces and localized roadway failures. In 2018, the City adopted an update to the Bicycle and Pedestrian Master Plan, which identified the West Las Positas Boulevard corridor between Foothill Road and Fairlands Drive as the highest priority for pedestrian and bicycle improvements. Docusign Envelope ID: 13052E52-7AE9-4FA9-885F-4547DF464456