BOARD AGENDA MEMORANDUM
SUBJECT:
Title
Adopt Plans and Specifications and Authorize Advertisement for Bids for the Installation of Cathodic Protection Rectifiers and Deep-Well Anodes on the Pacheco Conduit, Project No. 91214010.
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RECOMMENDATION:
Recommendation
A. Adopt Plans and Specifications and Authorize Advertisement for Bids for the Installation of Cathodic Protection Rectifiers and Deep-Well Anodes on the Pacheco Conduit per the Notice to Bidders; and
B. Authorize the Designated Engineer to issue addenda, as necessary, during the bidding process.
Body
SUMMARY:
The San Felipe System transports raw water from San Luis Reservoir to Santa Clara and San Benito Counties. The District is responsible for the operation and maintenance of the system pursuant to an agreement with United States Bureau of Reclamation (USBR). The Pacheco Conduit is an integral portion of the San Felipe System; it is comprised of 7.9 miles of 120 inch diameter pre-stressed concrete cylinder pipe (PCCP) known to be susceptible to corrosion.
Cathodic protection is an electrical means of corrosion control, and is a proven method to protect and extend the useful life of pipelines and appurtenances. The Pacheco Conduit was provided with a corrosion monitoring system when it was built in 1985, but not with a cathodic protection system, since pre-construction resistivity testing at that time showed the Pacheco Conduit to be in a relatively non-corrosive environment.
The proposed Project involves the installation of four (4) cathodic protection rectifiers and four (4) deep-dell anodes on the Pacheco Conduit, installed to extend the useful life of the pipeline, and minimize the potential for unexpected outages, leaks, and catastrophic failures. Completion of the proposed Project will improve the long term reliable delivery of untreated water through the District's water supply system.
Construction of the proposed Project is scheduled to begin in spring 2017 and the work woul...
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