---
kind: "section"
citation: "33 U.S.C. § 512"
title: "33"
title_heading: "Navigation and Navigable Waters"
number: "512"
heading: "Obstruction of navigation"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/33/512"
units:
  - "Chapter 11 — Bridges Over Navigable Waters"
  - "Subchapter II — Alteration of Bridges"
---

# §512. Obstruction of navigation


No bridge shall at any time unreasonably obstruct the free navigation of any navigable waters of the United States.


## Source credit

(June 21, 1940, ch. 409, § 2, 54 Stat. 498.)