Airport Liquefaction Susceptibility Analysis Report - ABAG ...

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Fugro Consultants, Inc. Project No. 04.79221200 San Francisco and Oakland airports to assess the potential for slope instability and seepage resulting from co-seismic liquefaction. TABLE OF CONTENTS Executive Summary .................................................................................................................... ii 1.0 introduction ......................................................................................................................... 1 1.1 Purpose ........................................................................................................................... 2 2.0 Background ......................................................................................................................... 2 2.1 Liquefaction during the 1989 Loma Prieta Earthquake .................................................... 3 2.2 Fill Emplacement around San Francisco Bay .................................................................. 3 3.0 Scope and Methodology ...................................................................................................... 4 3.1 Project Scope .................................................................................................................. 4 3.2 Methodology .................................................................................................................... 5 3.2.1 Data Compilation and Review................................................................................... 5 3.2.2 Development of a Geologic Map and Model ............................................................. 5 3.2.3 Liquefaction Susceptibility Analysis .......................................................................... 6 3.2.4 Preparation of Settlement Maps ............................................................................... 7 4.0 Geologic Setting .................................................................................................................. 8 4.1 San Francisco International Airport (SFO)....................................................................... 9 4.2 Oakland International Airport (OAK) ...............................................................................10 4.3 Buchanan Field Airport (CCR)........................................................................................11 4.4 Livermore Municipal Airport (LVK)..................................................................................12 4.5 Moffett Federal Airfield (NUQ) ........................................................................................13 5.0 Liquefaction Hazard Assessment .......................................................................................14 5.1 Methodology ...................................................................................................................14 5.1.1 Ground Motion Parameters .....................................................................................15 5.1.2 Groundwater ............................................................................................................17 5.1.3 Quality of Available Subsurface Data.......................................................................18 5.2 Results ...........................................................................................................................18 5.2.1 San Francisco International Airport ..........................................................................20 5.2.2 Oakland International Airport ...................................................................................20 5.2.3 Buchanan Field Airport ............................................................................................21 iv May 31, 2013
Fugro Consultants, Inc. Project No. 04.79221200 5.2.4 Livermore Municipal Airport .....................................................................................21 5.2.5 Moffett Federal Airfield ............................................................................................21 6.0 Conclusions .......................................................................................................................22 6.1 Liquefaction Hazards ......................................................................................................23 6.1.1 San Francisco International Airport ..........................................................................23 6.1.2 Oakland International Airport ...................................................................................24 6.1.3 Buchanan Field Airport ............................................................................................25 6.1.4 Livermore Municipal Airport .....................................................................................26 6.1.5 Moffett Federal Airfield ............................................................................................26 6.2 Recommendations .........................................................................................................27 6.2.1 Liquefaction Investigations ......................................................................................27 6.2.2 Additional Site Studies .............................................................................................27 6.2.3 Mitigation .................................................................................................................27 7.0 References .........................................................................................................................29 LIST OF FIGURES Figure 1 Figure 2 Figure 3A Figure 3B Figure 3C Figure 3D Airport and Fault Location Map A and B. Photographs of Liquefaction Features at Oakland International Airport Following the October 17, 1989 Loma Prieta Earthquake Quaternary Geologic Map, San Francisco International Airport Historical Bay Environments Map, San Francisco International Airport Geologic Cross Section AA-AA’, San Francisco International Airport, San Francisco, California Historical Aerial Views of San Francisco International Airport Figure 3E Approximate Extent of Developed Land in 1943, 1956, 1968, 1973, 1974, and Circa 1850 Bay Margin, San Francisco International Airport Figure 4A Figure 4B Figure 4C Quaternary Geologic Map, Oakland International Airport Historical Bay Environments Map, Oakland International Airport Geologic Cross Section BB-BB’, Oakland International Airport, Oakland, California Figure 4D Historical Aerial View of Oakland International Airport, 1939 v May 31, 2013
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Legend Existing Borings &< 2080000
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40 20 ELEVATION (FEET) USC-02 39 ft
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