In an effort to evaluate the impact of the 1972-73 Navajo Generating Station at Page, Arizona and the strip mine at Black Mesa on the Navajo Reservation, areas adjacent to each of these operations were surveyed (N=134 and 60 respectively) and compared with two control populations (N=60 from the rural area of Red Lake and 58 from the wagework area of Tuba City). Attempting to differentiate between real lifestyle transformations within the affected areas and rural to urban migration, comparisons were made in terms of: (1) Demography (age and education of household heads and spouses; marriage patterns; religious affiliation; household size and composition; length of residence; location of prior residence); (2) Social Organization (camp size and composition; community residence after marriage; livestock ownership and patterns of cooperation beyond the camp; hauling wood and water; cooperative arrangements for herding sheep; stock permits); (3) Economics (income; wage, unearned, livestock, agricultural, and craft income; major expenses; commercial transactions). Results indicated: incomes, levels of employment, and levels of education were all higher in the impact area around Lake Powell, while levels of unemployment and welfare expenditures were lower; household heads were younger and family groups were smaller in the impact areas; rural populations were unaffected; observed differences were not so much the result of transformation as the effect of migration of younger, more skilled workers. (JC)