FROM: James D. Herberg, General Manager
Originator: Kathy Millea, Director of Engineering
SUBJECT:
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NEWHOPE-PLACENTIA TRUNK SEWER REPLACEMENT, PROJECT NO. 2-72B
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
Approve a contingency increase of $2,038,470 (3.5%) to the construction contract with Group OHL USA, Inc. for Newhope-Placentia Trunk Sewer Replacement, Project Nos. 2-72B and 2-72C, for a total construction contingency of $5,824,200 (10%).
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BACKGROUND
The upper reaches of the Newhope-Placentia Trunk Sewer carry flows from the cities of Brea, Fullerton, Placentia, and Anaheim to Plant No. 1 for reclamation. The Newhope-Placentia Trunk Replacement, Project No. 2-72, will increase the capacity of the trunk sewer to satisfy current and future flows, allow abandonment under a subsequent project of Yorba Linda Pump Station, and add flexibility to the collections system to divert reclaimable flows to Plant No. 1.
In May 2018, a construction contract was awarded to Group OHL USA, Inc. for Newhope-Placentia Trunk Sewer Replacement, Project Nos. 2-72B and 2-72C. The contract replaces four miles of pipeline within sensitive areas along State College Boulevard, including Anaheim's Platinum Triangle, and business and residential areas. The work includes traffic control sequencing, deep excavations, multiple shifts, sewer bypassing, pipeline abandonment, four trenchless jack and bore crossings through major arterial streets and railroads, and sewer pipe crack repair work on the Rolling Hills Sub-Trunk. At the time of award, the work was scheduled to be complete in February 2021, however, due to unknown conditions and sequencing delays it is expected to complete in the summer of 2021.
RELEVANT STANDARDS
* Ensure the public's money is wisely spent
* Maintain a proactive asset management program
* Achieve less than 2.1 sewer spills per 100 miles
PROBLEM
Unforeseen conditions encountered during construction have...
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