One of district's first tasks was to build Alpine Dam to provide drinking water for the county's growing population.

[5] 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.

[5] In January 1918 district took over the building of Alpine Dam and construction was completed a year later.

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.