BOARD AGENDA MEMORANDUM
SUBJECT:
Title
Adopt Plans and Specifications and Authorize Advertisement for Bids for Pacheco Conduit Inspection and Rehabilitation Project, Project Nos. 91214001 and 91221006.
End
RECOMMENDATION:
Recommendation
A. Adopt the plans and specifications and authorize advertisement for bids for inspection and rehabilitation of the Pacheco Conduit per the Notice to Bidders;
B. Authorize the Designated Engineer to issue addenda, as necessary, during the bidding process, and;
C. Find that the Pacheco Conduit Inspection and Rehabilitation Project is substantially complex and, therefore, requires a construction contract retention of 10 percent (10%).
Body
SUMMARY:
The proposed Project involves inspection, maintenance, and rehabilitative work on the Pacheco Conduit and a 1/2 mile portion of the Santa Clara Conduit, under the Pipeline Maintenance Program (PMP).
The Pacheco Conduit consists of approximately 7.9 miles of 120 inch diameter Prestressed Concrete Cylinder Pipeline (PCCP), constructed in the 1980's. The Pacheco Conduit is an integral part of the U.S. Bureau of Reclamation (Reclamation) Central Valley Project San Felipe Division, which conveys raw water from the San Luis Reservoir to Santa Clara and San Benito counties. The District is responsible for inspecting the Pacheco conduit every five (5) years in accordance with the maintenance and operation agreement with Reclamation. In FY06, staff completed an inspection and rehabilitation project on a portion of the Pacheco Conduit. Approximately 2/3 of the Pacheco Conduit was inspected, with 12 (0.85%) pipe sections found to have wire break damage. Reclamation requested a full re-inspection of the Pacheco Conduit in 2012; however, the threat posed by the presence of zebra mussels in the Hollister conduit delayed this inspection at that time.
The project also includes work on a 1/2 mile portion of the Santa Clara Conduit and rehabilitation activities at the bifurcation structure...
Click here for full text