UCLA Civil & Environmental Engineering Department

C&EE 1

The Resilience Program for the City of Los Angeles
Marissa Aho
Chief Resilience Officer, City of Los Angeles

Lifeline Impact from ShakeOut Scenario Earthquake
Ken Hudnut
Southern California Coordinator, Earthquake Hazards Program, U.S. Geological Survey

The import water systems of southern California are vulnerable to earthquakes, such as the M 7.8 ‘ShakeOut’ scenario, as was examined by Davis & O’Rourke (EERI Spectra, 2011). A new interagency Seismic Resilient Water Supply Task Force has been formed to address not only the ShakeOut scenario but also other severe earthquake scenarios. The overall concept is that by forming a coalition, the agencies who collectively import water by the three aqueducts to all southern Californians will ‘act as if one agency’ as they consider priorities for earthquake mitigation and retrofit actions over the upcoming years. USGS is involved in an advisory capacity on earth science aspects of this range of issues. For example, the exact location of the San Andreas fault, where it intersects the Elizabeth Tun-nel (near Lake Hughes), is currently being studied by cone penetrometer testing and drilling, as well as using a laser scan of the tunnel interior to see whether or not aseismic fault creep may have occurred since the tunnel was constructed “gun-barrel straight” over 100 years ago. This work, and other studies in progress by all three main import water agencies, is in preparation for engineering design work that will consider a wide range of future mitigation options to reduce risk and increase resilience of the water systems that support the needs of all southern Californians and the much broader economy served by our region.

Where: 3400 Boelter Hall
When: Friday, November 3, 2017 2:00pm – 3:50pm