Pub. L. 93-251, tit. I, sec. 81

Sec. 81. The Secretary of the Army, acting through the Chief of Engineers, is authorized and directed to study the feasibility and practicality of constructing, operating, and maintaining in the vicinity of Duluth. Minnesota, a hydraulic model of all or a part of the Great Lakes and their connecting channels and an associated technical center, and to report thereon to Congress with recommendations not later than June 30, 1976.