South Fork Detention Dam, located in Custer, Idaho, is a gravity dam primarily owned and managed by the Bureau of Land Management for flood risk reduction in the Bradshaw Basin area. The dam stands at a structural height of 31 feet, with a hydraulic height of 26 feet, and a length of 340 feet. It has a storage capacity of 30 acre-feet, with a normal storage of 24 acre-feet, covering a surface area of 24 acres and draining a 3.9 square mile watershed.

Although the dam has a low hazard potential and is considered to be in moderate risk condition, it has not been rated for its condition assessment. The last inspection was conducted in July 2012, with an inspection frequency of 5 years. The spillway type is uncontrolled with a width of 2 feet, and the maximum discharge capacity is 220 cubic feet per second. Despite its relatively small size and limited functionality, South Fork Detention Dam plays a crucial role in mitigating flood risks in the region and protecting the surrounding rural ranch community.

Overall, South Fork Detention Dam serves as a vital infrastructure for flood control in the Bradshaw Basin, with the Bureau of Land Management overseeing its operation, maintenance, and regulatory compliance. While its risk assessment indicates moderate concerns, the dam's low hazard potential suggests that it poses minimal threat to downstream areas. With its strategic location and purposeful design, South Fork Detention Dam stands as a testament to efficient water resource management and climate adaptation efforts in Idaho.