Willwood Dam Drawdown

Wyoming Department of Environmental Quality  | view as a webpage

Wyoming Department of Environmental Quality

Willwood Dam Drawdown

Fall Drawdown: Willwood Irrigation District (WID) is planning to begin drawing down the reservoir behind Willwood Dam in the coming days to help minimize the release of sediment during the fall spawning period for brown trout and mountain whitefish, which occurs from approximately October 15th to November 15th. Turbidity levels may be higher than normal in the Shoshone River downstream of the dam during the drawdown, as lowering the water level behind the dam causes deposited sediment to be re-suspended and transported downstream. WID continues to work with the Wyoming Department of Environmental Quality, Wyoming Game and Fish Department, Wyoming Water Development Office, Wyoming State Engineer’s Office, United States Bureau of Reclamation, United States Geological Survey, and others to minimize potential impacts of sediment releases to the downstream Shoshone River fishery. Questions can be directed to David Waterstreet, Watershed Protection Program Manager, Water Quality Division, Wyoming Department of Environmental Quality, at David.Waterstreet@wyo.gov or 307-777-6709.

Additional Information: A follow-up announcement will be sent soon that describes updates to the operating recommendations and responses to comments received; turbidity and sediment monitoring efforts on the Shoshone River upstream and downstream of Willwood Dam; sediment monitoring on tributaries to the Shoshone River upstream of Willwood Dam; other water quality and fisheries monitoring efforts; as well as other topics of interest.