SPU Water Main Leak and Repair

This evening, all evacuated residents have been informed they may return to their residences. City crews were able to isolate a section of pipe that restricts water flow in the affected area, mitigating the risk of property damage if the water main were to break according to the geotechnical engineer.

In addition, Seattle Public Utilities has hired a contractor today, through an emergency contract, to begin work including assessing the slope and designing the repair of the SPU water main. Once that is complete, the contractor will begin excavation to uncover the pipe so SPU crews can inspect it and complete the repair.

This evening, the City of Mercer Island notified residents in approximately 20 homes near 95th Court SE to evacuate their property. A leaking underground water pipe has created unstable soil conditions, putting homes at risk. If soil conditions worsen and the water line breaks, dangerous flooding or a landslide is possible.

The City learned of the risk Wednesday late-afternoon, after a geotechnical engineer reviewed the soil conditions. The 24-inch high-pressure water pipe provides water to Mercer Island and is owned and maintained by Seattle Public Utilities. SPU is in the process of turning off the supply to the water line, which will take between six and eight hours. The Island is currently receiving water through a secondary water main.

The City of Mercer Island has directed that residents downstream of the leak evacuate immediately, until further notice. The Mercer Island Community & Event Center is serving as a gathering place for evacuated residents and their pets (8236 SE 24th St).

The City is coordinating with SPU, Eastside Fire & Rescue, King County’s Office of Emergency Management, American Red Cross, and other public safety departments to ensure the impacted residents are safe and protected.