Sweetwater Dam

Sweetwater Dam is a concrete structure that spans the Sweetwater River and creates a large reservoir behind it. The water is stored at significant capacity and controlled through multiple gates and an intake tower that manages its release.

The structure was completed in 1888 as a concrete construction and advanced water management technology in California. A major flood in 1916 caused damage that prompted engineers to redesign the spillway system.

The dam has become a landmark where visitors can see how people in the region approached water management and engineering challenges over time. It represents a turning point in how communities in California built and controlled water systems for their needs.

The best way to see the structure is to visit the dam itself where you can view the construction up close and observe the water control features. Check local access conditions before visiting since the site may have restricted areas or seasonal closures.

The main structure remained intact during the 1916 flood while its surrounding support systems failed. This experience changed how engineers designed spillway systems and influenced water control methods used elsewhere.

Location: San Diego County

Inception: November 1886

Official opening: 1888

GPS coordinates: 32.69140,-117.00800

Latest update: December 10, 2025 16:25