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Heavy storm at Moccasin reservoir triggered emergency dam response; city seeks state disaster aid

San Francisco Disaster Council · June 15, 2018
AI-Generated Content: All content on this page was generated by AI to highlight key points from the meeting. For complete details and context, we recommend watching the full video. so we can fix them.

Summary

A late‑March storm sent debris into Moccasin Reservoir, produced seepage at Moccasin Dam and prompted emergency action, small evacuations and interim repairs estimated at $15–$20 million; the PUC lists about $40 million in projects and the city is pursuing CDAA state assistance after FEMA declined federal aid.

Adrian, describing the late‑March event, said a storm delivered "a little over 3 inches of rain in 4 hours" to upcountry facilities near Moccasin, which sent debris and landslides into the reservoir and produced seepage on the dam face that triggered the utility's emergency action plan.

The response included immediate downstream notifications and small‑scale evacuations. Adrian said the emergency spillway functioned but sustained damage from…

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