33 USC § 512 - Obstruction of navigation
---
identifier: "/us/usc/t33/s512"
source: "usc"
legal_status: "official_prima_facie"
title: "33 USC § 512 - Obstruction of navigation"
title_number: 33
title_name: "NAVIGATION AND NAVIGABLE WATERS"
section_number: "512"
section_name: "Obstruction of navigation"
chapter_number: 11
chapter_name: "BRIDGES OVER NAVIGABLE WATERS"
subchapter_number: "II"
subchapter_name: "ALTERATION OF BRIDGES"
positive_law: false
currency: "119-84"
last_updated: "2026-04-17"
format_version: "1.1.0"
generator: "[email protected]"
source_credit: "(June 21, 1940, ch. 409, § 2, 54 Stat. 498.)"
---
# § 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.)