TO: Board of Supervisors
FROM: Steven Lederer - Director of Public Works
REPORT BY: Graham Wadsworth, P.E. Supervising Engineer
SUBJECT: Approval of Professional Services Agreement No. 250223B to Bureau Veritas and Budget Amendment for the Dry Creek Road Bridge Replacement Project, RDS 15-22
RECOMMENDATION
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Approve and authorize Agreement No. 250223B with Bureau Veritas for a contract maximum of $42,183 for constructability review services to support the construction of the Dry Creek Road Bridge and approve a Budget Amendment for design, engineering and construction management. (Fiscal Impact: $287,264; Capital Improvement Projects Fund; Not Budgeted; Discretionary)
[4/5 vote required]
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BACKGROUND
The Dry Creek Road Bridge over Dry Creek is 0.8 miles west of Mt. Veeder Road, over 100 years old, and in need of replacement. Caltrans identified the bridge as structurally deficient, functionally obsolete, and Scour Critical "due to scour under the north abutment." The width is only 18 feet between the bridge barriers, which does not meet the AASHTO standard of 11-foot minimum lanes. Dry Creek Road is designated as a "minor collector", the existing bridge is an "Off-System" bridge and thus the project is eligible for 88.53% Highway Bridge Program (HBP) funding and 11.47% Toll Credits funding as the match for local funds; however, there are some expenses that are ineligible for federal funding as described below.
On November 8, 2016, the Board of Supervisors approved an agreement with Biggs Cardosa Associates, Inc. (BCA) to design the Project. The proposed bridge structure would consist of an approximately 80-foot-long by 32-foot-wide single-span concrete slab bridge that is constructed on pre-cast and pre-stressed concrete girders. The project also includes 900 feet of new roadway to remove two curves in Dry Creek Road. County staff anticipates that the contractor will build the project in four stages to minimize the disruption to traffic and this would...
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