(3) Dam The term “dam”— (A) means any artificial barrier that has the ability to impound water, wastewater, or any liquid-borne material, for the purpose of storage or control of water, that— (i) is 25 feet or more in height from— (I) the natural bed of the stream channel or watercourse measured at the downstream toe of the barrier; or (II) if the barrier is not across a stream channel or watercourse, from the lowest elevation of the outside limit of the barrier; to the maximum water storage elevation; or (ii) has an impounding capacity for maximum storage elevation of 50 acre-feet or more; but (B) does not include— (i) a levee; or (ii) a barrier described in subparagraph (A) that— (I) is 6 feet or less in height regardless of storage capacity; or (II) has a storage capacity at the maximum water storage elevation that is 15 acre-feet or less regardless of height; unless the barrier, because of the location of the barrier or another physical characteristic of the barrier, is likely to pose a significant threat to human life or property if the barrier fails (as determined by the Administrator).


33 USC § 467(3)

Scoping language

In this subchapter
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