FROM: James D. Herberg, General Manager
Originator: Kathy Millea, Director of Engineering
SUBJECT:
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MACARTHUR FORCE MAIN IMPROVEMENTS, PROJECT NO. 7-68
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Professional Design Services Agreement with Michael Baker International, Inc. to provide engineering services for MacArthur Force Main Improvements, Project No. 7-68, for an amount not to exceed $500,000; and
B. Approve a contingency of $50,000 (10%).
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BACKGROUND
The Orange County Sanitation District (OC San) owns and maintains a 12-inch diameter force main extending approximately 2,100 feet along MacArthur Blvd. from the MacArthur Pump near Von Karman Avenue to Birch Street in the City of Newport Beach. This force main is approximately 60 years old.
RELEVANT STANDARDS
* Achieve less than 2.1 sewer spills per 100 miles
* California Government Code ?4526: Select the "best qualified firm" and "negotiate fair and equitable fees"
PROBLEM
Condition assessments indicate that the force main has corroded and is at risk of failure. A failure of this pipe would likely result in a sewage spill.
PROPOSED SOLUTION
Award a Professional Design Services Agreement for MacArthur Force Main Improvements, Project No. 7-68. The project will construct two new force mains to replace the single existing force main. OC San has been standardizing on dual force mains to allow inspection and maintenance without requiring expensive and disruptive bypass pumping. The additional force main can also be quickly put into service in the event of a leak or failure of the active force main.
TIMING CONCERNS
The schedule driver of this project is to resolve risks associated with deteriorated facilities to reduce the risks of potential spills.
RAMIFICATIONS OF NOT TAKING ACTION
Increased risk of failure of the pipes due to continued corrosion causing a sewage spill.
PRIOR COM...
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