REPORT TO COUNCIL
SUBJECT
Title
Award of Contract for Lawrence Expressway Sanitary Sewer Rehabilitation Condition Assessment and Preliminary Design Report (F15-24)
Report
REPORT IN BRIEF
Approval is requested to award a contract to Water Works Engineers, LLC of Redding in the amount of $426,000 ($274,000 in base services and $152,000 in optional services) for design of the Lawrence Expressway Sanitary Sewer Rehabilitation Condition Assessment and Preliminary Design Report (Public Works Project No. UY-15/03-16). Approval is also requested for a 10% design contingency in the amount of $42,600.
ENVIRONMENTAL REVIEW
This contract award for a rehabilitation condition assessment and preliminary design for the sewer main is not a project as defined in Section 15378 of the California Environmental Quality Act (CEQA), because it will not result in a physical change to the environment.
BACKGROUND AND DISCUSSION
The City of Sunnyvale Lawrence Expressway Sanitary Sewer trunk main is a critical pipeline for carrying sewage from the southern/eastern portions of the City and the Rancho Rinconada area of Cupertino to the Sunnyvale Water Pollution Control Plant (SWPCP). The sewer trunk main was originally installed in 1963 with a life expectancy of approximately 50 years. It is constructed of multiple materials and gradually increases in size from 15" at Stevens Creek Boulevard to 39" at Elko Drive. It has been impacted by corrosive sewer gases over the years, and structural defects have been found during limited inspections of the pipe. A manhole rehabilitation project to apply a cementitous lining to the manholes on this sewer trunk main was completed in 2007, but otherwise very little maintenance has been performed.
The trunk main is located in the right-of-way for Lawrence Expressway, which is not only a multi-lane major thoroughfare with heavy traffic, but is a County route controlled by the County of Santa Clara. As a result, City staff must get an enc...
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