 In January 1965 , the Department of the Interior completed its three @-@ volume , 1 @,@ 000 @-@ page study of the Rampart project 's feasibility and impact . The Fish and Wildlife study released in 1964 was included , as were studies of the impact on the region 's Alaska Native population . United States Secretary of the Interior Stewart Udall then created a task force to review the findings before he made a final decision . Throughout 1965 and 1966 , opponents and proponents of the project funded studies of their own , aimed either at supporting or rejecting the arguments for the dam . 
