TO: Board of Supervisors
FROM: Steven Lederer, Director of Public Works
REPORT BY: Sydney Barclay, Associate Engineer
SUBJECT: Approval of Contract Change Order No. 2 which exceeds the Director of Public Work's authority and Amendment No. 6 for Agreement No. 230084B with ADKO Engineering, Inc. for the Chiles Pope Valley Road MPM 3.63 Project.
RECOMMENDATION
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Approve and authorize the Director of Public Works to execute Contract Change Order No. 2, Part 2B to Agreement No. 250437B with Valentine Corporation to increase the maximum compensation from $763,369 to $832,260; and approve and authorize Amendment No. 6 to Agreement No. 230084B with ADKO Engineering, Inc. to increase the maximum compensation from $624,991 to $629,273 for additional construction support and environmental services for the Chiles Pope Valley Road MPM 3.63 Project 23006. (Fiscal Impact; $73,173 Expense; SB-1 Fund; Budgeted; Discretionary)
[4/5 vote required]
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BACKGROUND
On August 9, 2022, Napa County entered into Agreement No. 230084B with ADKO Engineering, Inc. (ADKO) to provide engineering design and consulting services for multiple capital improvement projects, including the Chiles Pope Valley Rd MPM 3.63 project, the Chiles Pope Bridge Replacement, Silverado Trail at Bell Canyon Creek Bridge (RDS 22-27), and Dry Creek Road MPM 9.75 (RDS 21-06) project. Since the original agreement was authorized, the County has issued five amendments to the Agreement due to the evolving scope required for the above-noted projects. Amendment No. 6 will increase the maximum compensation under the Agreement and expand ADKO's construction support and environmental services scope.
The Chiles Pope Valley Rd MPM 3.63 Project (RDS 22-27) was authorized to proceed with construction on June 17, 2025, and is scheduled for completion by October 15, 2025. Construction includes removal of the culvert's existing concrete wingwalls, construction of new concrete wingwalls on each side of the culvert (upstream...
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