Lake Elsman is a reservoir , created by an earthen dam called Austrian Dam on Los Gatos Creek in the Santa Cruz Mountains of California . At several points it is over 140 ' deep and its normal surface area is 96 acres . It provides 12 % of San Jose Water Works ’ total water capacity in some years . The lake and dam is owned by the San Jose Water Company , In 1988 and 1989 , two earthquakes at '' M '' = 5.3 and 5.4 respectively occurred at Lake Elsman that transferred stress that led to the 1989 '' M '' = 6.9 1989 Loma Prieta earthquake
1989 Loma Prieta earthquake
1989 Loma Prieta earthquake
Lake Elsman