Santa Fe Dam is a flood-control dam on the San Gabriel River located in Irwindale in Los Angeles County, California, United States. For most of the year, the 92-foot -high dam and its reservoir lie empty, but can hold more than 45,000 acre-feet of water during major storms. During the dry season, the basin behind the dam is used for groundwater recharge, as well a…Santa Fe Dam is a flood-control dam on the San Gabriel River located in Irwindale in Los Angeles County, California, United States. For most of the year, the 92-foot -high dam and its reservoir lie empty, but can hold more than 45,000 acre-feet of water during major storms. During the dry season, the basin behind the dam is used for groundwater recharge, as well as various recreational activities.