---
kind: "unit"
title: "33"
title_heading: "Navigation and Navigable Waters"
key: "ch12/schV"
level: "subchapter"
label: "Subchapter V"
heading: "Prosecution of Work Generally"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/33/ch12-schV"
sections_count: 15
---

# Subchapter V — Prosecution of Work Generally

Title 33 — Navigation and Navigable Waters › Chapter 12 — River and Harbor Improvements Generally

## Sections

- [§621. By what methods river and harbor work may be authorized to be prosecuted](/usc/33/621.md)
- [§622. Contracts, etc., with private industry for implementation of projects for improvements and dredging; reduction of federally owned fleet](/usc/33/622.md)
- [§623. Repealed.](/usc/33/623.md)
- [§624. Limitation on improvement work by private contract](/usc/33/624.md)
- [§625. Repealed.](/usc/33/625.md)
- [§626. Prosecution of work when appropriation in­sufficient](/usc/33/626.md)
- [§627. Application of appropriation when separate works are included therein](/usc/33/627.md)
- [§628. Expenditure for dredging within harbor lines](/usc/33/628.md)
- [§629. Contract for hire of dredging plant](/usc/33/629.md)
- [§630. Limitation on expenditure for purchase of dredges](/usc/33/630.md)
- [§631. Transfer of property between projects](/usc/33/631.md)
- [§632. Omitted](/usc/33/632.md)
- [§633. Protection, alteration, reconstruction, relocation, or replacement of structures and facilities; contract standards; reasonable costs](/usc/33/633.md)
- [§634. Assistance relating to water supply](/usc/33/634.md)
- [§635. Coast Guard anchorages](/usc/33/635.md)