All California Dams by
Year Completed
This map displays a point for each
California dam, with color indicating the year that the dam was completed. The
color map ranges from blue for the oldest dams in the database (ca. 1850) and
red for the newest dams (year 2000). The relative proportions of colors on the
map give a sense of the great increase in dam building activity in the
mid-twentieth-century and later.