South Fork 3-D is a significant earth dam located in Pawnee, Nebraska, designed by the USDA NRCS and completed in 1981. This dam serves a primary purpose of flood risk reduction and stands at a height of 31 feet, with a structural height of 36 feet. It has a storage capacity of 767 acre-feet and covers a surface area of 30 acres, with a drainage area of 1.9 square miles.

Managed by the Nebraska Department of Natural Resources, South Fork 3-D is regulated, permitted, inspected, and enforced to ensure its safe operation and maintenance. The dam has a low hazard potential and is currently in satisfactory condition, last assessed in 2017. Despite its age, South Fork 3-D continues to play a crucial role in mitigating flood risks in the region, with a maximum discharge capacity of 374 cubic feet per second.

Enthusiasts of water resources and climate will appreciate the engineering and hydrological details of South Fork 3-D, located along the TR-NEGRO BRANCH CREEK. With its historical significance and ongoing regulatory oversight, this dam exemplifies the importance of infrastructure in managing water resources and mitigating the impacts of extreme weather events in Nebraska.