The defendants (including Amory), as upstream owners and operators of a dam and impoundment, lawfully maintained a reservoir for beneficial use. The structure had been properly designed, constructed, and maintained in accordance with customary engineering practices. An extraordinary storm—of a severity without precedent in the area—struck, producing massive rainfall and runoff that rapidly exceeded the reservoir's capacity and the design assumptions for the dam and spillway. As inflows surged, water escaped the impoundment and rushed downstream, inundating the plaintiff Golden's land and causing substantial damage. Golden sued the defendants in tort, alleging negligence, trespass, and nuisance and, in substance, pressing a Rylands v. Fletcher–type strict liability theory for harm caused by the escape of a collected mass of water. The trial court found no evidence of negligence or unreasonable operation and entered judgment for the defendants. Golden appealed.
Can upstream dam owners be held liable in negligence, nuisance, or strict liability for downstream flood damage where an unprecedented and extraordinary natural event (an Act of God) was the sole proximate cause of the water's escape?
An Act of God—an extraordinary, unprecedented natural event that could not have been anticipated or guarded against by the exercise of reasonable foresight and prudence—breaks the chain of proximate causation and is a complete defense to tort liability, including Rylands v. Fletcher–style strict liability for the escape of a dangerous thing, so long as the natural event is the sole proximate cause of the harm and the defendant was not negligent in construction, maintenance, or operation.
No. The defendants were not liable. The storm was of unprecedented severity and constituted an Act of God that was the sole proximate cause of the flooding; there was no evidence of negligence or unreasonable operation by the defendants. Judgment for the defendants was affirmed.
The court first addressed negligence and found no proof that the dam or reservoir was defectively designed, constructed, or maintained, or that the defendants operated it unreasonably in the face of the storm. Without evidence of a departure from ordinary prudence, negligence could not support liability. Turning to strict liability and nuisance theories premised on Rylands v. Fletcher, the court reiterated that Massachusetts has not adopted a broad version of absolute liability for all nonnatural uses and, in any event, strict liability is not limitless. Even assuming the Rylands doctrine applied to impounded water, it contains an exception when an Act of God is the true, sole cause of the escape. The storm here was found to be unprecedented in intensity and volume—beyond what reasonable human foresight would require a prudent dam owner to anticipate or design against. That extraordinary natural phenomenon, not any human act or omission, set the harm in motion and directly produced the flooding. As a result, proximate cause was lacking as to the defendants' conduct, and the Act of God defense barred recovery. The court emphasized that the defense would fail if the defendant's negligence contributed to the loss, but on this record there was none.
Golden v. Amory is a staple in torts for its clear articulation of the Act of God defense and its limits. It teaches that strict liability is not absolute; causation and foreseeability still matter. The case is frequently used to test students' understanding of how extraordinary natural forces function as superseding causes and how plaintiffs might negate the defense by proving foreseeability, negligent design or operation, or that the event was not truly unprecedented. It also provides a template for analyzing dam and reservoir cases, public-utility operations, and modern disaster litigation in an era of evolving climate risk and changing baselines for what counts as "unprecedented."
Golden v. Amory underscores that even where defendants engage in potentially hazardous activities, liability depends on causation and foreseeability. Strict liability does not transform defendants into insurers against all harms; when an unprecedented natural event is the sole cause of loss, the Act of God doctrine defeats recovery.