33 U.S.C. § 621 : US Code - Section 621: By what methods river and harbor work may be authorized to be prosecuted

Search 33 U.S.C. § 621 : US Code - Section 621: By what methods river and harbor work may be authorized to be prosecuted

Any public work on canals, rivers, and harbors adopted by
Congress may be prosecuted by direct appropriations, by continuing
contracts, or by both direct appropriations and continuing
contracts.