Bonny Dam

Bonny Dam is a dam in Yuma County, Colorado, in the eastern part of the state.
The earthen dam was constructed between 1948 and 1951 by the United States Bureau of Reclamation, with a height of and long at its crest. It impounds the South Fork of the Republican River for flood control, irrigation storage and recreation, as part of the Bureau's extensive Pick-Sloan Missouri Basin Program. The dam is owned and operated by the Bureau.
The reservoir it creates, Bonny Reservoir, was drained in 2011. It formerly had a water surface area of over, a maximum capacity of, and a shoreline of about. All water was released downstream to flow across the Kansas state border, about to the east, to satisfy a May 2003 United States Supreme Court decision on a dispute arising from the Republican River Compact.
In September and October 2011, Bonny Lake was drained and many of the Bonny [Lake State Park]'s services were eliminated, including the fishery and the visitors' center. The dam structure remains. The park is now being operated as part of the South Republican River State Wildlife Area.