Mildred Island
Mildred Island is a submerged island in the San Joaquin River delta, in California. It is part of San Joaquin County. It flooded in 1983, and the land was abandoned. Its coordinates are 37°59′11″N 121°31′23″W / 37.9863117°N 121.5230069°W. It appears on 1913 and 1952 United States Geological Survey maps of the area.