TO: Board of Supervisors
FROM: Steven Lederer, Director of Public Works
REPORT BY: Graham Wadsworth, P.E., Engineering Supervisor
SUBJECT: Approval of Amendment 2 to Purchase and Sale Agreement No. 230262B in support of the Construction of the Dry Creek Road Bridge over Dry Creek Replacement Project, RDS 15-22
RECOMMENDATION
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Approve and authorize Amendment No. 2 to Agreement No. 230262B with Christopher A. Marusich and Michelle F. Del Rosario, Trustees of the Marusich Family Revocable Trust Dated May 4, 2017, to increase the maximum compensation from $177,282 to $195,282 to provide a housing accommodation during the construction of the Dry Creek Road Bridge over Dry Creek Replacement Project. (Fiscal Impact: $18,000 Expense; Roads Capital Improvement Projects Fund; Budgeted; Discretionary)
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BACKGROUND
The Dry Creek Road Bridge over Dry Creek (0.8 miles west of Mt. Veeder Rd.) is over 100 years old. Caltrans identified the bridge as structurally deficient, functionally obsolete, and unstable due to scour under the north abutment. The substructure of the existing bridge has cracking and weathering of the mortar in the joints of the stone masonry abutments. The width is only 18 feet between the barriers, which does not meet the American Association of State Highway and Transportation Officials (AASHTO) standard of 11-foot minimum lanes.
AASHTO is a standards setting body which publishes specifications, test protocols, and guidelines that are used in highway design. The proposed bridge structure will consist of an approximately 80-foot-long by 32-foot-wide, single-span concrete slab bridge that would be 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 require work in Dry Creek over two summers. On May 6, the Board awar...
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