FROM: James D. Herberg, General Manager
Originator: Kathy Millea, Director of Engineering
SUBJECT:
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TUSTIN AVENUE MANHOLE AND PIPE REPAIR, PROJECT NO. FE17-06
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
Approve a contingency increase of $70,000 to the construction contract with Nuline Technologies, LLC for Tustin Avenue Manhole and Pipe Repair, Project No. FE17-06, for a total contingency of $105,000 (30%).
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BACKGROUND
The Orange County Sanitation District (Sanitation District) owns and operates a regional sewer near Tustin Avenue and Orangethorpe Avenue in the cities of Anaheim and Placentia. The vitrified clay sewer was originally installed in 1960. The Sanitation District identified significant cracks in the pipe as well as a manhole defect. A construction contract was awarded to Nuline Technologies, LLC in October 2019 and construction is approximately 95 percent complete.
RELEVANT STANDARDS
* Ensure the public's money is wisely spent
* Maintain a proactive asset management program
PROBLEM
Unforeseen conditions encountered during construction have resulted in higher than expected contract changes. At the beginning of construction, a previously unidentified natural gas line, street light and traffic signal conduit and cables, and a concrete encasement were found inside the project excavation limits. The cost of addressing these unknown, below grade conditions has already exceeded the Board authorized contract contingency. Stopping the work would have resulted in much higher costs resulting from the need to leave the work site in a safe condition for the public and to demobilize and remobilize the contractor.
PROPOSED SOLUTION
Approve a contingency increase of $70,000 to the construction contract for a total contingency of $105,000 (30%). This increase will cover additional costs to complete the work and provide funds for additional construction-related ri...
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