 Owing to increasing public pressure , in June 1967 , United States Secretary of the Interior Stewart Udall announced he was strongly opposed to the dam , citing economic and biological factors as well as the drastic impact on the area 's native population . Though this effectively ended the project , planning continued to go ahead until the final Army Corps of Engineers report was released in 1971 and recommended the project " not be undertaken at this time " . Alaska governor William Allen Egan protested the statement , saying the report was out of date due to population growth in Alaska and rising demand for electricity . 
