Tag Archive for: San Diego Aqueduct

From the Archives: San Diego Aqueduct Dedication 75 Years Ago Marked New Era in Region’s Quest for Water

Seventy-five years ago, on Dec. 11 1947, the 71-mile San Diego Aqueduct was dedicated and put into operation, bringing water from the Colorado River to San Diego. By 1949, 85 percent of all water consumed in San Diego was Colorado River water. Today, after conservation, desalination, and other efforts to add to local water supplies, some 70 percent of the region’s water supply still flows through the aqueduct system.

Aqueduct Shutdown December 4 – 15

On December 4, 2021, the San Diego County Water Authority will be taking the 74-year old 1st San Diego Aqueduct out of service until December 15, 2021. With the aqueduct being off the district loses water supply to approximately 85% of the District’s its area (see map). 

First Aqueduct shutdown-Map

The Water Authority is taking the 48” diameter pipeline out of service to inspect and make final design decisions on how to make the needed repairs to the three tunnels discovered in the recently completed northern 1st Aqueduct relining project.

From The Archives December 12, 1947: San Diego Aqueduct Dedicated

In 1947 the $14 million San Diego Aqueduct was dedicated and put into operation as the Navy officially turned over control to the County Water Authority. The 71-mile aqueduct brought Colorado River water from Riverside County to the San Vicente Reservoir near Lakeside. The Navy sponsored and supervised the construction in order to ensure a supply of water for the important naval and military establishments in and around San Diego. When Colorado River water finally flowed through the aqueduct into San Vicente Reservoir, San Diego had less than a month’s supply on hand.