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San Dieguito Water District receives asbestos-cement pipe risk assessment, plans phased replacements
Summary
Consultants recommended a dynamic risk model and prioritized replacements, identifying Faith & McKinnon and downtown Encinitas as early project areas; board received and filed the plan.
The San Dieguito Water District board received and filed an asbestos-cement (AC) pipeline condition assessment and replacement plan at its Feb. 19 meeting, following a technical presentation from district staff and consultants.
Principal Engineer Elmer Alex and consultants from Hope Consulting and HDR presented a risk-based, dynamic model that combines likelihood of failure and consequence of failure to prioritize AC pipe replacement over a 10-year capital improvement program. The district owns about 168 miles of water main; consultants estimated roughly 67% of that mileage is asbestos-cement pipe.
“AC pipe is commonly used as a pipe material from 1960 to 1990… Our district owns and operates approximately 168 miles of water main. Approximately 67% of that is constructed of AC pipe,” Alex said. Adam Hope of Hope Consulting described the project risk model as “dynamic,” meaning the district can update it as new sampling, break history, or operational data…
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