Pub. L. 91-611, tit. II, sec. 233

Sec. 233. The Chief of Engineers, under the direction of the Secretary of the Army, is hereby authorized and directed to review and study the effects of strip mining operations upon navigable rivers and their tributaries, including water resource projects under his jurisdiction, and report on such studies to the Committees on Public Works of the Senate and the House of Representatives, within one year from the date of enactment of this Act, with recommendations as to measures necessary to mitigate any adverse conditions due to strip mining practices.