The Parsnip River is a 240-kilometre (150 mi) long river in central British Columbia, Canada. It flows generally north-westward from the Parsnip Glacier in the Hart Ranges to the Parsnip Reach of Williston Lake, formed by the impounding of the waters of the Peace River by the W.A.C. Bennett Dam in 1968. Prior to that, the Parsnip joined with the Finlay River to form the Peace at Finlay Forks, with both sharing an alignment along the Rocky Mountain Trench.
Fish populations and their protozoan and metazoan parasites in the headwater areas of the McGregor River (Pacific drainage) and of the Parsnip River (Arctic drainage) were the subject of studies carried out in the 1970s concerning the proposed diversion of waters across the continental divide. Three parasites (Ceratomyxa shasta, Cryptobia salmositica, and Haemogregarina irkalukpiki) were identified as posing the greatest threat to the fisheries resources of the immediate area and also to the downstream areas. Based in part on these studies, the British Columbia Hydro and Power Authority, in a public announcement, suspended engineering studies of the proposed diversion.
Hisao P. Arai and Dwight R. Mudry. 1983. Protozoan and Metazoan Parasites of Fishes from the Headwaters of the Parsnip and McGregor Rivers, British Columbia: A Study of Possible Parasite Transfaunation. Canadian. J. Fish. Aquat. Sci. 40(10): 1676–1684 (1983)