Bonita Long Canyon, located in Bonita, California, is a local government-owned earth dam constructed in 1986 with the primary purpose of flood risk reduction along the Tr Sweetwater River. Standing at a height of 29 feet and a hydraulic height of 23.5 feet, the dam spans 400 feet in length and has a storage capacity of 49 acre-feet. Despite its modest size, the dam serves an important role in safeguarding the surrounding community from potential flooding events.

Managed by the California Department of Water Resources (DWR) and subject to state regulation, inspection, and enforcement, Bonita Long Canyon Dam has been assessed as having a low hazard potential with a satisfactory condition as of September 2017. The dam boasts a well-maintained status, evidenced by the last inspection conducted in March 2021. With a steady track record of safety and operational effectiveness, the dam continues to fulfill its critical function of mitigating flood risks in the region. For water resource and climate enthusiasts, Bonita Long Canyon serves as a noteworthy example of local infrastructure contributing to the resilience and protection of communities against natural disasters.