From the Document: "The U.S. Army Corps of Engineers (USACE) is a Department of Defense agency with civil works responsibilities, consisting largely of water resource projects to maintain navigable channels, reduce flood and storm damage, and restore aquatic ecosystems. These projects can have national and local economic and environmental benefits. USACE also has a role in responding to natural disasters, especially floods, in U.S. states and territories. This In Focus covers the appropriations that Congress has provided USACE that are in addition to annual appropriations―'supplemental appropriations.' Congress may consider both the amount of USACE supplemental appropriations and how effectively and efficiently the agency is using these funds."
CRS In Focus, IF11945
Congressional Research Service: https://crsreports.congress.gov/