---
kind: "unit"
title: "33"
title_heading: "Navigation and Navigable Waters"
key: "chII/part329"
level: "part"
label: "Part 329"
heading: "Definition of Navigable Waters of the United States"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/33/chII-part329"
sections_count: 16
---

# Part 329 — Definition of Navigable Waters of the United States

Title 33 C.F.R. — Navigation and Navigable Waters › Chapter II — Corps of Engineers, Department of the Army, Department of Defense

## Sections

- [§329.1. Purpose.](/cfr/33/329.1.md)
- [§329.2. Applicability.](/cfr/33/329.2.md)
- [§329.3. General policies.](/cfr/33/329.3.md)
- [§329.4. General definition.](/cfr/33/329.4.md)
- [§329.5. General scope of determination.](/cfr/33/329.5.md)
- [§329.6. Interstate or foreign commerce.](/cfr/33/329.6.md)
- [§329.7. Intrastate or interstate nature of waterway.](/cfr/33/329.7.md)
- [§329.8. Improved or natural conditions of the waterbody.](/cfr/33/329.8.md)
- [§329.9. Time at which commerce exists or determination is made.](/cfr/33/329.9.md)
- [§329.10. Existence of obstructions.](/cfr/33/329.10.md)
- [§329.11. Geographic and jurisdictional limits of rivers and lakes.](/cfr/33/329.11.md)
- [§329.12. Geographic and jurisdictional limits of oceanic and tidal waters.](/cfr/33/329.12.md)
- [§329.13. Geographic limits: Shifting boundaries.](/cfr/33/329.13.md)
- [§329.14. Determination of navigability.](/cfr/33/329.14.md)
- [§329.15. Inquiries regarding determinations.](/cfr/33/329.15.md)
- [§329.16. Use and maintenance of lists of determinations.](/cfr/33/329.16.md)