BOARD AGENDA MEMORANDUM
SUBJECT:
Title
Report of Bids Received, Award of Construction Contract to Farwest Corrosion Control Company for the Installation of Cathodic Protection Rectifiers and Deep-Well Anodes on the Pacheco Conduit Project, Project No. 91214010, Contract No. C0623 (Unincorporated County), (District 1).
End
RECOMMENDATION:
Recommendation
A. Ratify Addendum No. 1 to the Contract documents for the Installation of Cathodic Protection Rectifiers and Deep-Well Anodes on the Pacheco Conduit Project;
B. Waive minor irregularities in Farwest Corrosion Control Company's Bid;
C. Award the Contract to Farwest Corrosion Control Company, in the sum of $291,740; and
D. Approve a contingency sum of $43,761 and authorize the Interim Chief Executive Officer or designee to approve individual change orders up to the designated amount.
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 a written agreement with United States Bureau of Reclamation (Reclamation). 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), a material 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. At that time, pre-construction resistivity testing indicated that the Pacheco Conduit was installed in a relatively non-corrosive environment. However, it has since been learned that corrosion of steel pre-stressed wires of PCCP can be arrested by application of cathodic protection to the pipeline, to reduce the risk of catastrophic failure...
Click here for full text