Long Branch R-3 is a local government-owned earth dam located in Humboldt, Nebraska, designed by USDA NRCS and regulated by the Nebraska Department of Natural Resources. Completed in 1981, this dam serves a primary purpose of flood risk reduction and storage with a hydraulic height of 29 feet and a structural height of 31 feet. It has a normal storage capacity of 30 acre-feet and a maximum discharge of 752 cubic feet per second, protecting the surrounding area from potential flooding events.

With a low hazard potential and fair condition assessment as of April 2018, Long Branch R-3 plays a crucial role in managing water resources in Richardson County. The dam has a drainage area of 0.6 square miles and serves as a vital structure for water storage and flood control along Long Branch Creek. This earth dam, constructed with stone core types and soil foundations, covers a surface area of 7 acres and has a total length of 625 feet, providing essential infrastructure for water resource management in the region.

Despite its modest size, Long Branch R-3 represents a key component of the water infrastructure in Richardson County, Nebraska. With state regulation, inspection, and enforcement in place, this dam ensures the safety and protection of the local community from potential flood risks. Managed by the Natural Resources Conservation Service, this dam stands as a testament to effective water resource management and climate resilience efforts in the region.