 The reservoir and dam were named after Leroy Anderson, a key founder and first president of the Santa Clara Valley Water District.It is the largest reservoir owned by the district.In January 2009, a preliminary routine seismic study suggested a small chance that a large-magnitude earthquake (6.6 with the dam at the epicenter, or 7.2 up to a mile away) could result in flooding in Morgan Hill and as far away as San Jose.