---
kind: "unit"
title: "33"
title_heading: "Navigation and Navigable Waters"
key: "ch12/schIV"
level: "subchapter"
label: "Subchapter IV"
heading: "Particular Work or Improvements"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/33/ch12-schIV"
sections_count: 13
---

# Subchapter IV — Particular Work or Improvements

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

## Sections

- [§601. Mississippi River; regulation of reservoirs at headwaters](/usc/33/601.md)
- [§602. Maintenance of channel of South Pass of Mississippi River](/usc/33/602.md)
- [§603. Repealed.](/usc/33/603.md)
- [§603a. Removal of snags and debris, and straightening, clearing, and protecting channels in navigable waters](/usc/33/603a.md)
- [§604. Removal of snags, etc., from Mississippi River](/usc/33/604.md)
- [§605. Operation of snag boats on Upper Mississippi River](/usc/33/605.md)
- [§605a. Mississippi River forecasting improvements](/usc/33/605a.md)
- [§606. Removal of snags, and so forth, from Ohio River](/usc/33/606.md)
- [§607. Removal of drift from New York Harbor](/usc/33/607.md)
- [§607a. Appropriations; separate project](/usc/33/607a.md)
- [§608. Construction of fishways](/usc/33/608.md)
- [§609. Sluices and other work in dams for development of water power](/usc/33/609.md)
- [§610. Control of aquatic plant growths and invasive species](/usc/33/610.md)