To: Board of Supervisors
From: Brian M. Balbas, Public Works Director/Chief Engineer
Report Title: Amendment to Consulting Services Agreement with PreScience Corporation, Concord area
?Recommendation of the County Administrator ? Recommendation of Board Committee
RECOMMENDATIONS:
APPROVE and AUTHORIZE the Public Works Director, or designee, to execute a Consulting Services Agreement (contract) amendment with PreScience Corporation, effective December 31st, 2023, to increase the payment limit by $100,000.00 to a new payment limit of $1,727,747.28 for construction management services for the Marsh Drive Bridge Replacement Project, and to extend the term from December 31, 2023 to December 31, 2024, Concord area. (County Project No.: 0662-6R4119) (Federal Project No.: BRLS-5928 (128)) (District IV and V)
FISCAL IMPACT:
This project, including this Consulting Services Agreement, will be funded by 88.53% Federal Highway Bridge Program Funds and 11.47% Local Road Funds.
BACKGROUND:
The Project consists of removing the existing bridge on Marsh Drive over Walnut Creek (State Bridge No. 28C-0442), which is seismically, structurally, and hydraulically deficient, and construct a new concrete bridge in stages to current standard, reconstructing the roadway approaches from both ends of the bridge, constructing a new separated walking path on the south side of the bridge that will connect to the existing Iron Horse Trail, and incorporating drainage improvements, utility work, erosion control work, and roadway signing and striping.
PreScience was selected to provide construction management services for the Project after completing a request for proposal solicitation and technical proposal process. Construction management services for the Project includes full time inspection, quality assurance materials testing, quality assurance surveying, extensive coordination with project stakeholders including Caltrans, Contra Costa Water District, City of Concord, and the East Bay ...
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