33 U.S.C. § 467d — National inventory of dams and low-head dams

(a) In general: The Secretary of the Army must maintain and update information about the inventory of dams and low-head dams in the United States.

(b) Dams: This inventory must include any available information assessing each dam^*, based on inspections done by a federal agency^*, a state dam safety agency^*, or a tribal government.

(c) Low-head dams: For low-head dams, the inventory must include (1) each dam's location, ownership, description, current use, condition, height, and length; (2) any information about public-safety conditions at each low-head dam; and (3) any other relevant information about low-head dams.

(d) Data: To carry this out, the Secretary must (1) coordinate with federal and state^* agencies, tribal governments, and other relevant groups, and (2) use the data those agencies and groups provide.

(e) Public availability: The Secretary must make this inventory public, including on a public website, along with (1) public-safety information about the dangers of low-head dams, and (2) a directory of financial and technical help available to reduce safety hazards and fish-passage barriers at low-head dams.

(f) Clarification: This section gives the Secretary no authority to do anything about a low-head dam beyond what this section explicitly allows.

(g) Low-head dam defined: A "low-head dam" is an artificial barrier that spans most of a stream channel, blocks the waterway, and backs up water behind it, with a drop of at least 6 inches and no more than 25 feet over the wall.