United States. Environmental Protection Agency. Region X.
United States. National Park Service.
United States. Bureau of Land Management.
U.S. Fish and Wildlife Service.
United States. Army. Corps of Engineers.
Ott Water Engineers, inc.
Ott Water Engineers.
prepared by U.S. Environmental Protection Agency (Region 10) and U.S. Department of the Interior, National Park Service, Bureau of Land Management, Fish and Wildlife Service.