Courtesy of Cabrillo National Monument

Photo: Dignitaries including California’s Governor rode the flume across East County, from Lake Cuyamaca to Lake Murray.

February 23, 2023 (San Diego) -- 134 years ago, the San Diego Flume opened. Today, the word flume is often used to describe a type of theme park ride in which users get splashed while riding in a wooden roller coaster. While such a thing would be ahead of its time in the 1880s, the San Diego Flume was far more significant, because it provided something essential to the residents of the small but growing city of San Diego than any thrill ride could: abundant water. 

The Flume’s construction began in 1886 with the goal of bringing a reliable and plentiful water supply to the residents of the growing city and county of San Diego. The Flume project dammed the San Diego River's waters at the bottom of the Cuyamaca Mountains and then through a 35 mile complex of wooden chutes, trestles, and tunnels delivered it to a reservoir in La Mesa. From there, water was conveyed to places across San Diego where residents could reliably irrigate their farms and gardens and enjoy plentiful drinking water.