Identification Of The Polaris Fault Using Lidar And Shallow Geophysical Methods
Lewis E. Hunter, Michael H. Powers and Bethany L. Burton
Event name: 23rd EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems
Session: Geotechnical & Geological Mapping
Publication date: 11 April 2010
Info: Extended abstract, PDF ( 1.79Mb )
As part of the U.S. Army Corps of Engineers’ (USACE) Dam Safety Assurance Program, Martis Creek Dam near Truckee, CA, is under evaluation for earthquake and seepage hazards. The investigations to date have included LiDAR (Light Detection and Ranging) and a wide range of geophysical surveys. The LiDAR data led to the discovery of an important and previously unknown fault tracing very near and possibly under Martis Creek Dam. The geophysical surveys of the dam foundation area confirm evidence of the fault in the area.