33 U.S.C. § 628 : Navigation And Navigable Waters — River And Harbor Improvements Generally — Prosecution Of Work Generally — Expenditure For Dredging Within Harbor Lines Date: 7 Mar 2017 TEXT PDF No money appropriated for the improvement of rivers and harbors shall be expended for dredging inside of harbor lines duly established. (July 13, 1892, ch. 158, § 5, 27 Stat. 111.) Codification Section is from the Rivers and Harbors Appropriation Act of 1892.