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A water line located on Sunol Boulevard near the Pleasanton Senior Center broke early Tuesday morning, causing traffic congestion and leaving the Senior Center without water service for several hours.

The break started as a slow leak Monday evening and progressively worsened, leading to the break on Tuesday, said Scott Baker, assistant director of Public Works and Operations for the city.

The water line’s close proximity to a PG&E transmission line complicated problems, causing electricity to flicker on and off in various areas throughout west Pleasanton on Tuesday and early Wednesday and causing traffic signals to go down in the area. All power was back on by mid-morning Wednesday.

A temporary water jumper was installed to reestablish water connection with the senior center, Baker said. The facility was only without water on Tuesday. No other areas went without water, he added.

City crews are still working to find a permanent fix to the problem by collaborating with PG&E.

“Part of the problem is that PG&E will have to relocate its transmission line,” Baker said. “It’s an important project to PG&E and us, and PG&E is really working to get their part of this done, so hopefully it will be (in) very short order.”

Although repairs are wrapping up, the city is not sure what caused the break.

“It’s still not exactly clear, but we’re looking into it,” Baker said. “These are physical structures under high pressure. There are a lot of things that can cause them to fail over time: age, fatigue, soil movement. Sometimes they get hit by something, by someone digging, but we know that’s not the case here.”

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