161 N.Y. 290, 55 N.E. 923 (Court of Appeals of New York 1900)
Sullivan v. Dunham is a foundational New York torts decision that crystallizes a core principle of strict liability: when a landowner's ultrahazardous activity directly invades a public highway and injures a traveler, liability attaches without proof of negligence.
Is a landowner liable, without proof of negligence, when blasting on his own land propels debris onto a public highway and causes personal injury to a traveler lawfully upon the highway?
A landowner who, while lawfully using his land, directly invades a public highway (or another's premises) by projecting material that causes personal injury is liable irrespective of negligence. The public's right to safe passage on highways is paramount, and under the maxim sic utere tuo ut alienum non laedas, one must so use his own property as not to injure others. Thus, for ultrahazardous activities such as blasting, strict liability attaches when the activity causes a direct physical invasion that results in personal injury.
Yes. The landowner is strictly liable for injuries to a traveler caused by debris propelled onto a public highway by blasting, regardless of the degree of care exercised.
Sullivan v. Dunham is a canonical strict-liability case that illustrates the transition from negligence-dominated tort law to modern doctrines governing ultrahazardous activities. It stands for the proposition that due care is not a defense when blasting causes a direct physical invasion of public space resulting in personal injury. The case draws an important line between direct invasions (strict liability) and purely consequential harms (historically treated under negligence), a line that New York later adjusted in Spano v. Perini by extending strict liability to concussive damage from blasting. For students, Sullivan is essential to understanding how courts balance competing rights, articulate the limits of land-use freedom, and allocate losses to the party best positioned to control ultrahazardous risks.