Geologic-Hazard and Adverse-Construction-Condition Maps for the St. George–Hurricane Area, Washington County, Utah
By W.R. Lund, T.R. Knudsen, G.S. Vice, and L.M. Shaw
Geologic hazards and adverse construction conditions included in the report:
- Surface Fault Rupture
- Earthquake Ground Shaking (Text document only, no map prepared.)
- Rock Fall
Adverse Construction Conditions
- Expansive Soil and Rock
- Collapsible Soil
- Gypsiferous Soil and Rock
- Shallow Bedrock
- Wind-Blown Sand
- Breccia Pipes and Paleokarst
- Soil Piping and Erosion
- Shallow Ground Water
About the Authors
William Lund has 36 years of experience as an engineering geologist—7 years with geotechnical consulting firms in Arizona, California, and Oregon, and 29 years with the UGS. He is a former deputy director of the UGS, presently is the Geologic Hazards Program Senior Scientist, and is manager of the UGS’ Southern Regional Office in Cedar City.
He is a Licensed Professional Geologist in Utah, Registered Geologist in Arizona, and Certified Engineering Geologist in Oregon, and is a past president of the Intermountain Section of the Association of Engineering Geologists, Utah Geological Association, and Dixie Geological Society. In addition to the geologic-hazards mapping project described in this article, other recent projects include seismic-hazard evaluations of the Hurricane, Sevier, and Washington faults.
Tyler Knudsen is a geologist with the UGS Geologic Hazards Program in Cedar City. His principal responsibilities are to identify, investigate, and publish information on Quaternary faults, landslides, and other potential geologic hazards in southwestern Utah. Tyler has been instrumental in the completion of the comprehensive St. George–Hurricane geologic hazards mapping project and is currently studying the seismic potential of the Washington fault near St. George.
Upcoming projects include ArcGIS Geographic Information System-based geologic hazards mapping in Zion National Park and the Cedar City– Parowan Valleys. Prior to joining the UGS in early 2006, Tyler worked for a St. Georgebased geotechnical consulting firm, and completed a master’s degree in geology at the University of Nevada, Las Vegas.
Garrett Vice was formerly a geologist for the UGS. He worked as a co-investigator on the St. George–Hurricane geologic hazards project for several months prior to attending graduate school at the University of Nevada, Reno. Garrett will graduate from UNR in June with a master’s degree in geology, and is looking forward to a promising career in the oil industry.
Lucas Shaw is a GIS Analyst for the Geologic Hazards Program. Since signing on with the UGS in 2004, he has worked to get GIS technologies and information into the hands of expert and novice alike.
His work for the Hazards Program includes landslide susceptibility analysis, emergency response preparedness, and custom GIS application development. He has also improved the GIS administration, data management, and GIS integration with Internet map services at the UGS.
Lund, W.R., Knudsen, T.R., Vice, G.S., and Shaw, L.M., 2008, Geologic hazards and adverse construction conditions, St. George-Hurricane Metropolitan Area, Washington County, Utah: Utah Geological Survey Special Study 127, variously paginated, 14 plates, scale 1:24,000.
Surface Fault Rupture
Expansive Soil & Rock
Gypsiferous Soil & Rock
Breccia Pipe & Paleokarst
Wind Blown Sand
Piping & Erosion
Shallow Ground Water
Survey Notes, v. 40 no. 2, May 2008