Army Corps of Engineers: Water Resource Authorization and Project Delivery Processes [Updated April 19, 2019] [open pdf - 2MB]
From the Document: "At the direction of Congress, the U.S. Army Corps of Engineers (USACE) in the Department of Defense (DOD) undertakes water resource development activities. USACE develops civil works projects principally to improve navigable channels, reduce flood and storm damage, and restore aquatic ecosystems. Congress directs USACE through authorizations and appropriations legislation. Congress often considers USACE authorization legislation biennially and appropriations annually. USACE attracts congressional attention because its projects can have significant local and regional economic benefits and environmental effects. This report summarizes authorization legislation, project delivery, authorities for alternative project delivery, and other USACE authorities."
CRS Report for Congress, R45185
Congressional Research Service: https://crsreports.congress.gov/