Army Corps of Engineers: Continuing Authorities Programs [Updated January 5, 2021] [open pdf - 507KB]
From the Document: "The U.S. Army Corps of Engineers (USACE) undertakes water resource development projects pursuant to authorizing statutes and the receipt of appropriations. The standard process for a USACE project requires two separate congressional authorizations--one for studying feasibility and a subsequent one for construction--as well as appropriations for both. [...] Additionally, Congress has granted USACE programmatic authorities to undertake cost-shared projects of limited scope and cost without requiring project-specific congressional authorization. These programmatic USACE authorities are referred to as Continuing Authorities Programs (CAPs). Congress has consistently funded USACE CAPs above the President's request since FY2013."
CRS In Focus, IF11106
Congressional Research Service: https://crsreports.congress.gov/