Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Water Resources Development Act (WRDA), is a reference to public laws enacted by Congress to deal with various aspects of water resources: environmental, structural, navigational, flood protection, hydrology, etc.The United States Army Corps of Engineers (USACE) is a federal agency and a major Army command made up of some 36,000 civilian and military personnel,making it the world's largest public engineering, design and construction management agency. Although generally associated with dams, canals and flood protection in the United States, USACE is involved in a wide range of public works support to the nation and the Department of Defense throughout the world. The Corps of Engineers provides outdoor recreation opportunities to the public, and provides 24% of U.S. hydropower capacity.