Hazard Investigation and Mitigation Plan

Find out more about the site hazard assessment report as well as seismic, tsunami and flood mitigation plan for the HB Desalination Project.

Even though independent scientific studies have concluded that tsunami, sea level rise and earthquake hazard risk at the proposed Huntington Beach Seawater Desalination facility site are extremely low, Poseidon water has gone above and beyond all state and federal requirements and Coastal Act provisions.  The Geotechnical Hazards Assessment Report and Seismic Tsunami Response Plan ensure that even in an extreme worst-case scenario hazard event, all potential risks are fully minimized.  Some key factors to consider:

  • No earthquake fault has been determined to exist on the Project site
  • The closest fault (South Branch of the Newport Inglewood Fault) is a half-mile away
  • At the request of the Coastal Commission, a magnitude 7.5 earthquake at the South Branch was modeled and while the facility may suffer temporary service interrpution, no significant structural damage is likely.
  • The study reviewed a worst-case scenario tsunami combined with extreme sea level rise that could occur by 2050, but because the desalination plant’s elevations are 9-to-14 feet above mean sea level, the project would be unaffected by a combination of sea level rise and tsunami.

View the Geotechnical Hazards Assessment Report

View the Seismic Tsunami Response Plan


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