ABSTRACT:The construction of three Missouri River main stem dams, Garrison, Oahe and Fort Randall, and the related reservoir taking caused social and economic changes on five Indian reservations, Fort Berthold, Cheyenne River, Standing Rock, Crow Creek and Lower Brute. The inundation of Missouri River riparian lands caused the loss of important cultural, social and economic environments. Ninety percent of the reservations timber, seventy‐five percent of its wildlife and most of the fertile cropland were in the reservoir taking area. Urban and more fertile environments downstream and to the east received most of the projects benefits. The Indian minority on the five reservations received few economic and social benefits after bearing a disporportionate share of the social and economic costs of the developments. Relocation was forced upon those who had the longest historic and cultural claim to the land. The social costs to the American Indian occasioned by the Missouri River water developments illustrates two broad areas seldom considered during the decision process. First, the unique historic, cultural or religious values of minorities affected by developments. Second, the disproportionate spacial allocation of both benefits and costs. The second item includes social, economic and cultural considerations in not just a geographic framework but a cultural framework as wel
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