Word is a private-owned dam located in Mellette, South Dakota, managed by the Natural Resources Conservation Service. Built in 1956, this earth dam stands at 28 feet high and spans 319 feet in length. With a storage capacity of 34 acre-feet, Word serves as an offstream structure for TR Big White River. The dam has a low hazard potential and is currently rated as "Not Rated" in terms of condition assessment.

Despite being privately owned, Word is regulated by the South Dakota Department of Environment and Natural Resources, with permitting, inspection, and enforcement processes in place. The dam is situated within the jurisdiction of the state and complies with state regulatory standards. The primary purpose of Word is not specified, but it serves as an important water resource infrastructure in the area. Although the dam has not been rated for its condition, it meets all state requirements for operation and safety.

Word does not have associated structures or a designated emergency action plan in place. While the dam has not been inspected recently, it falls under the jurisdiction of the St. Paul District of the US Army Corps of Engineers. The dam has a spillway width and number of locks unspecified, but it has a maximum discharge capacity of 158 cubic feet per second. Overall, Word plays a significant role in water resource management in the region, contributing to irrigation, water storage, and flood control efforts.