Completed in December 1963, Dillon Reservoir is the largest water
storage facility in the Denver Water system holding over 40% of Denver's water. The entire town of Dillon,
Colorado, and a hydroelectric plant were relocated to build the dam. The dam was built to divert water from the Blue River Basin through
the Harold D. Roberts Tunnel under the Continental Divide into the South
Platte River Basin. Dillon Dam is an earth-fill dam, 5,888 feet long by
231 feet above the Blue River stream bed. Dillon Reservoir's surface
area of 3,233 acres and 26.8 miles of shoreline.