Alpine Dam (national ID number: CA00204) is a
gravity dam which was completed in . It is long and high, with of
freeboard. The dam was designed with consultation provided by
Michael O’Shaughnessy, who was, at the time, a board member of the district. Construction on Alpine started in the summer of 1917, but the outbreak of World War I led to shortages of labor and materials for the contractor. In January 1918 district took over the building of Alpine Dam and construction was completed a year later. When first built, the reservoir held just over a billion gallons of water, but the dam was raised in 1924 and again in 1941. The reservoir now has a capacity approaching 3 billion gallons and continues to play a vital role in supplying fresh water to thousands of people in the district. ==Hiking==