FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Director of Engineering
SUBJECT:
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SUNFLOWER AND RED HILL INTERCEPTOR REPAIRS, PROJECT NO. 7-66
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a project budget increase of $150,000 for Sunflower and Red Hill Interceptor Repairs, Project No. 7-66, for a new total project budget of $6,750,000; and
B. Approve a contingency increase of $50,000 (1%) to the existing Construction Contract to Charles King Company for Sunflower and Red Hill Interceptor Repairs, Project No. 7-66, for a new total contingency amount of $527,700 (11%).
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BACKGROUND
Orange County Sanitation District's (OC San) Sunflower Interceptor Reach 3 and Red Hill Interceptor Reaches 4 and 5 consist of a gravity trunk sewer approximately 6,000 feet long located in the cities of Irvine and Costa Mesa and bordering the city of Santa Ana. The trunk sewer was constructed in 1971, consists of reinforced concrete pipes varying in sizes from 27 inches to 84 inches, and runs along Red Hill Avenue, Main Street, and Sunflower Avenue. To protect the concrete from corrosive sewer gas, the pipe was constructed with a polyvinyl chloride (PVC) liner installed in the upper 270 degrees of the pipe. The bottom 90 degrees of the pipe was expected to be fully submerged and thus not subject to corrosion. This project installed corrosion-inhibiting epoxy on the bottom uncoated portion of the concrete pipe between the existing PVC liner and the low water line. Construction began in July 2021 and physical work is complete.
RELEVANT STANDARDS
* Ensure the public's money is wisely spent
* Maintain collaborative and cooperative relationships with regulators, stakeholders, and neighboring communities
* Sound engineering and accounting practices, complying with local, state, and federal laws
PROBLEM
This project was planned to be completed in September 2022; however, the construction end dat...
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