Pub. L. 90-483, tit. I, sec. 111

Sec. 111. The Secretary of the Army, acting through the Chief of Engineers, is authorized to investigate, study, and construct projects for the prevention or mitigation of shore damages attributable to Federal navigation works. The cost of installing, operating, and maintaining such projects shall be borne entirely by the United States. No such project shall be constructed without, specific authorization by Congress if the estimated first cost exceeds $1,000,000.