TO: Board of Supervisors
FROM: Steven Lederer, Director of Public Works
REPORT BY: Graham Wadsworth, P. E., Engineering Supervisor
SUBJECT: Advertise for Bids and Amendment 5 to Agreement No.170635B for Biggs Cardosa Associates, Inc. for the Dry Creek Road Bridge Replacement Project, RDS 15-22.
RECOMMENDATION
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Approve Plans and Specifications for the Dry Creek Road Bridge Replacement Project; authorize for sealed bids and opening of the bids at a time, date, and location to be published by the Director of Public Works pursuant to Section 20150.8 of the Public Contract Code; approve and authorize Amendment No. 5 to Agreement No. 170635B with Biggs Cardosa Associates, Inc. to increase the maximum compensation by $288,531, for a new maximum of $2,323,003 for additional engineering services; and approve a Budget Amendment. (Fiscal Impact: $175,000 Expense; 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...
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