San Pasqual Undergrounding Project

Sukut removed, relocated, and replaced approximately two and a half miles of the Escondido Canal that crosses through the San Pasqual Indian Reservation. The three major components to accomplish this included: desilting basin construction, demolition and replacement of existing canal with concrete box, and 60-inch pipeline installation. The 110-foot-long by 32-foot-wide desilting basin is a hydraulic structure within the 100-foot city right-of-way that will require the construction of large retaining walls and an all-weather access road to facilitate desilting basin use. The demolition and replacement section of the first half-mile of the open canal was replaced with a shallowly buried 60-inch-wide by 48-inch-high precast concrete box culvert. Finally, the construction of a new 60-inch diameter pipeline in a new 1.5-mile-long alignment across portions of the San Pasqual Indian Reservation included a 350-foot-long tunnel to minimize environmental impacts to a riparian area.

Upon completion, the project received several industry recognitions, including:

• 2024 APWA Project of the Year Award
• 2024 ASCE Outstanding Water/Wastewater Project Award
• 2023 ENR Regional Best Projects Award of Merit in the Water/Environment category