ultrahazardous activity

Definition

An activity or process that presents an unavoidable risk of serious harm to the other people or others’ property, for which the actor may be held strictly liable for the harm, even if the actor has exercised reasonable care to prevent that harm. Also termed abnormally dangerous activity; extrahazardous activity.

According to the Restatement (Second) of Torts, § 520: “In determining whether an activity is abnormally dangerous, the following factors are to be considered: (a) existence of a high degree of risk of some harm to the person, land, or chattels of others; (b) likelihood that the harm that results from it will be great; (c) inability to eliminate the risk by the exercise of reasonable care; (d) extent to which the activity is not a matter of common usage; (e) inappropriateness of the activity to the place where it is carried on; and (f) extent to which its value to the community is outweighed by its dangerous attributes.”