About the RCTWG

The Redwood Coast Tsunami Work Group (RCTWG) is an organization of local, state and federal agencies, tribes, relief and service groups, land managers, and businesses from Del Norte, Humboldt and Mendocino Counties. The group was formed in July 1996 to define the needs of local jurisdictions to mitigate the North Coast earthquake and tsunami hazard and to promote a coordinated, consistent mitigation program for all coastal areas. The RCTWG received recognition by the Coastal Region, Governor's Office of Emergency Services in May 1997, as a part of on-going state hazard reduction efforts. In April 2002, the Humboldt County Board of Supervisors declared their support of "…the Redwood Coast Tsunami Work Group and its member organizations to mitigate the effects of future great earthquakes." The Western States Seismic Policy Council recognized the RCTWG in 2009 with an Award in Excellence for Innovation for its mitigation efforts.


In the past decade many organizations, businesses, agencies and individuals have supported RCTWG activities including:


  • American Red Cross
  • Humboldt State University
  • California Department of Water Resources
  • California Geographic Alliance
  • College of the Redwoods
  • Humboldt County Sheriff's Dept OES
  • Humboldt County Health Dept.
  • Humboldt County Fair Association
  • North Coast Emergency Medical Services
  • Del Norte County OES
  • Mendocino Emergency Services Authority
  • Northern California Safety Consortium
  • Bureau of Land Management
  • Caltrans
  • North Coast Schools Insurance Group
  • Calif. Geological Survey
  • Pacific Watershed Associates
  • Humboldt Bay Harbor
  • Port and Recreation District
  • Redwood National and State Parks
  • Eureka Fire Dept.
  • Del Norte Co. Ambulanc
  • California State Parks
  • Humboldt Co. Parks
  • CA State Coastal Commission
  • National Weather Service
  • Busch Geotechnical Consultants
  • Guy Conversano Consulting Engineer
  • GeoEngineers
  • Humboldt Association of Realtors
  • Winzler & Kelly Consulting Engineers
  • Pacific Gas & Electric Co.
  • Yurok Tribe
  • Professional Engineers in California Government
  • Dell' Arte Education Through Arts
  • KIEM News Channel 3.

More Information

Contact Lori Dengler
Professor of Geology
Humboldt State University
Phone: 707.826.3115
Email: lad1@humboldt.edu