Oak-Middle 58-B is a significant earth dam located in Raymond, Nebraska, designed by the USDA NRCS to reduce flood risk along the TR-OAK CREEK. Completed in 1965, this dam stands at 42 feet high and spans 820 feet in length, with a storage capacity of 350 acre-feet and a drainage area of 1.1 square miles. Despite its age, the dam has been well-maintained, with a satisfactory condition assessment as of June 2016 and a low hazard potential.

Operated by the local government, Oak-Middle 58-B is regulated, permitted, inspected, and enforced by the Nebraska Department of Natural Resources. While the dam has not undergone any modifications in recent years, its emergency action plan and risk assessment measures are currently not specified. With a primary purpose of flood risk reduction, this structure plays a crucial role in protecting the surrounding area from potential inundation events, with a maximum discharge capacity of 1,084 cubic feet per second. Overall, Oak-Middle 58-B serves as a vital infrastructure for water resource management and climate resilience in Seward County, Nebraska.