---
kind: "section"
citation: "33 U.S.C. § 467d"
title: "33"
title_heading: "Navigation and Navigable Waters"
number: "467d"
heading: "National inventory of dams and low-head dams"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/33/467d"
units:
  - "Chapter 9 — Protection of Navigable Waters and of Harbor and River Improvements Generally"
  - "Subchapter VII — Dam Inspection Program"
---

# §467d. National inventory of dams and low-head dams

- (a) **In general—** The [Secretary](/usc/33/426h–1.md?p=2) of the Army shall maintain and update information on the inventory of [dams](/usc/33/467.md?p=3) and low-head [dams](/usc/33/467.md?p=3) in the [United States](/usc/33/467.md?p=17).
- (b) **Dams—** The inventory maintained under [subsection (a)](#a) shall include any available information assessing each [dam](/usc/33/467.md?p=3) based on inspections completed by a [Federal agency](/usc/33/467.md?p=5), a [State dam safety agency](/usc/33/467.md?p=14), or a Tribal government.
- (c) **Low-head dams—** The inventory maintained under [subsection (a)](#a) shall include—
  - (1) the location, ownership, description, current use, condition, height, and length of each low-head [dam](/usc/33/467.md?p=3);
  - (2) any information on public safety conditions at each low-head [dam](/usc/33/467.md?p=3); and
  - (3) any other relevant information concerning low-head [dams](/usc/33/467.md?p=3).
- (d) **Data—** In carrying out this section, the [Secretary](/usc/33/426h–1.md?p=2) shall—
  - (1) coordinate with Federal and [State](/usc/33/467.md?p=13) agencies, Tribal governments, and other relevant entities; and
  - (2) use data provided to the [Secretary](/usc/33/426h–1.md?p=2) by those agencies and entities.
- (e) **Public availability—** The [Secretary](/usc/33/426h–1.md?p=2) shall make the inventory maintained under [subsection (a)](#a) publicly available (including on a publicly available website), including—
  - (1) public safety information on the dangers of low-head [dams](/usc/33/467.md?p=3); and
  - (2) a directory of financial and technical assistance resources available to reduce safety hazards and fish passage barriers at low-head [dams](/usc/33/467.md?p=3).
- (f) **Clarification—** Nothing in this section provides authority to the [Secretary](/usc/33/426h–1.md?p=2) to carry out an activity, with respect to a low-head [dam](/usc/33/467.md?p=3), that is not explicitly authorized under this section.
- (g) **Low-head dam defined—** In this section, the term “low-head [dam](/usc/33/467.md?p=3)” means a river-wide artificial barrier that generally spans a stream channel, blocking the waterway and creating a backup of water behind the barrier, with a drop off over the wall of not less than 6 inches and not more than 25 feet.

## Source credit

(Pub. L. 92–367, § 6, as added Pub. L. 104–303, title II, § 215(c)(8), Oct. 12, 1996, 110 Stat. 3687; amended Pub. L. 109–460, § 1(b), Dec. 22, 2006, 120 Stat. 3401; Pub. L. 118–272, div. A, title I, § 1132(b), Jan. 4, 2025, 138 Stat. 3021.)

## Notes

### Editorial Notes

### Prior Provisions

A prior section 467d, Pub. L. 92–367, § 5, Aug. 8, 1972, 86 Stat. 507, directed Secretary report to Congress on or before July 1, 1974, on activities under this subchapter, including in report an inventory of dams in the United States, a review of each inspection made, recommendations to State Governors and implementation of those recommendations, recommendations for comprehensive national program for inspection and safety regulation, and recommendations on responsibilities which should be assumed by Federal, State, and local governments and by public and private interests, prior to repeal by Pub. L. 104–303, title II, § 215(c)(2), Oct. 12, 1996, 110 Stat. 3685.

A prior section 6 of Pub. L. 92–367 was classified to section 467e of this title prior to repeal by Pub. L. 104–303.

### Amendments

2025—Pub. L. 118–272 amended section generally. Prior to amendment, text of section read as follows: “The Secretary of the Army shall maintain and update information on the inventory of dams in the United States. Such inventory of dams shall include any available information assessing each dam based on inspections completed by either a Federal agency or a State dam safety agency.”

2006—Pub. L. 109–460 amended section generally. Prior to amendment, section read as follows: “The Secretary of the Army, acting through the Chief of Engineers, may maintain and periodically publish updated information on the inventory of dams in the United States.”