Belle Fourche Dam

The Belle Fourche Dam, also known as Orman Dam, is a dam on Owl Creek in Butte County, South Dakota, USA, approximately east of Belle Fourche, South Dakota, along U.S. Route 212. Its construction created the Belle Fourche Reservoir, the Belle Fourche National Wildlife Refuge, and the Rocky Point Recreation Area.
The reservoir has approximately of water surface, of land, and of shoreline. It is stocked with walleye, catfish, and white bass. Average depth is, but it has areas as deep as at full capacity. Common activities at BFR include boating, fishing, ice fishing, ice skating, camping, cooking out, water skiing, and fossil hunting.
Construction occurred in several stages between 1903 and 1907. The dam was the first project undertaken by the United States Bureau of Reclamation. At its 1911 completion by the USBR, Belle Fourche Dam was the largest earthen dam in the world. The dam is listed on the National Register of Historic Places. In 1989, it was listed among the approximately 250 Historic Civil Engineering Landmarks.
The dam is described as "a homogeneous earthfill structure containing about of material. It has a maximum base width of, a structural height of, and a hydraulic height of. The crest of the dam at elevation has a length of and a width of."