The U.S. Army Corps of Engineers (USACE) Section 408 policy, EC 1165-2-220 effective September 10, 2018, sets forth the process and criteria USACE uses to review requests to alter USACE Civil Works projects which include dams, hydropower, levees systems and navigational channels. Communities may want to alter existing USACE projects to increase recreational opportunities or improve flood risk management. Section 408 also applies if a business or utility company seeks to run power lines or pipelines over or through a USACE project. The purpose of a Section 408 review is to ensure that the Congressionally-authorized benefits of a USACE project are not undermined by an alteration made by others, and to ensure the alteration is not injurious to the public.