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Glendora crews replace aging valves, restore service to about 80–90 homes after emergency repairs
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Summary
City water staff reported crews replaced century‑old gate valves and made temporary and permanent repairs to mains and hydrant laterals, restoring service to about 80–90 homes within scheduled windows and asking the commission to receive and file the report.
Dale, a member of the City of Glendora water division staff, told the commission crews recently replaced a broken 6‑inch gate valve dating to 1953 and installed a butterfly valve and a 45‑degree ductile‑iron fitting to reconnect the main, restoring service to roughly 80–90 homes.
He said the broken valve was found in a closed position and the shallow depth of the main required specialty approaches. "None of this shows in our maps or our GIS," Dale said, noting crews often must make real‑time decisions in the field. Temporary clamps and a carefully staged evening shutdown allowed water service to be restored within about four hours after an initial main break; other planned repairs were completed within a six‑hour window.
The work included precise cuts and specialty tooling — including a chainsaw blade designed for steel and ductile iron and vacuum excavation equipment (a Vactor). Dale described standard backfill and protection practices: sand bedding beneath the pipe, 6–18 inches of compacted cover, concrete kickers to support valves and resist thrust, and epoxy or tar wraps to reduce corrosion on older exposed fittings. He said newer materials such as ductile iron and epoxy coating increase longevity compared with uncoated cast parts from the 1930s–1950s.
Commissioners asked whether the drop in leaks reflected capital replacements or better data. Dale and staff said records of past repairs exist on paper but had not been consolidated; the department is now using GIS and new analytics, including pressure monitoring and leak correlation, to identify problem areas earlier and support preventative maintenance.
After discussion, a commissioner moved to receive and file the water distribution update; the motion carried with three votes in favor.
The report and conversation underscore the challenges of aging underground infrastructure and the tradeoffs staff weigh when balancing emergency repairs with planned capital improvements. Staff said they will continue to use new data tools to refine prioritization of CIP projects and to limit disruptive emergency repairs.
