Since animals depend upon the quality and quantity of range available to them, a hydro-electric dam can be expected to destroy any animal population which depends upon the flooded land. The effects of the Kariba Dam upon wildlife along the Zambezi River (between Zambia and Rhodesia in Africa) are popularly known for numerous documentary films, and while the effects of other hydro-electric projects may have been less-dramatic at the time of flooding, their ultimate results have been just as devastating for wildlife. For instance, a series of impoundments on the Missouri River in North Dakota resulted in calculated loss of over 40 percent of the harvestable production of white-tailed deer in the vicinity of these projects (James V. Mackenzie, Pres. Comm., 1969). In British Columbia’s Tweedsmuir Park, the construction of the Kenney Damn on the Nechako River in 1952 resulted in the loss of large numbers of moose, mule dear, trumpeter swans, and caribou as a result of flooding.
Smith, I.D.. 1970. Probable Effects of the Libby Dam upon Wildlife Resources of the East and West Kootenay. Department of Recreation and Conservation