## Facts

- Earl and Loretta Williams and their son Don owned and operated about 2,500 acres of irrigated farmland in southwest Kansas, supplied by multiple irrigation wells drawing from several aquifers.
- In 1968, one irrigation well began malfunctioning; ignition of a match near the wellhead revealed natural gas in the water.
- Amoco Production Company operated nearby Hugoton natural gas wells and later identified leakage problems in two wells adjacent to the Williams property.
- The Williamses alleged gas migrated from Amoco’s wells into groundwater feeding their irrigation wells, reducing pumpable water and damaging the long-term productive value of their farmland.
- The Williamses first sought temporary damages for crop losses, then amended to seek permanent damages for broader, alleged lasting impairment to irrigation capacity.
- The case was tried primarily on strict liability (abnormally dangerous activity); the jury was instructed on strict liability (not nuisance) and returned a $656,006.40 verdict for property damages.

## Issues

1. Whether operation and leakage of natural gas wells in the Hugoton field supports strict liability as an abnormally dangerous activity rather than requiring proof of negligence.
2. Whether claims for permanent damages were barred by the statute of limitations given earlier suits for temporary damages and later amendments.
3. Whether amendments expanding the acreage and converting claims from temporary to permanent damages properly related back and were permitted without unfair prejudice.
4. Whether instructional and evidentiary rulings (including expert opinions on valuation and the scope of injury) improperly affected the verdict and damages.

## Decision

- The Kansas Supreme Court reversed the judgment and remanded for a new trial.
- The court held the trial court erred by submitting the case on strict liability; the proper theory was negligence.
- The court held the permanent-damages claims were not time-barred because the later amendments arose from the same alleged gas-migration occurrence and related back.
- The court upheld allowing amendments to pleadings as within the trial court’s discretion, finding no substantial prejudice to Amoco.
- The court identified additional problems in the way the case was submitted to the jury, including errors affecting damages and the breadth of land treated as injured, and directed that retrial be limited to areas supported by sufficient evidence of gas-related harm.

## Legal Principles

- Strict liability for abnormally dangerous activities applies only when the activity, considering factors such as risk and appropriateness to location, justifies liability without fault; ordinary natural gas production in a long-established gas field is not automatically such an activity.
- Where the harm can be addressed through reasonable care, negligence is the governing liability standard for alleged subsurface gas migration from well operations.
- For continuing or recurring injury where the full extent of harm later becomes apparent, amended claims for a different measure of damages may proceed if they arise from the same occurrence and the defendant had notice.
- Amendments that expand damages or affected property may relate back when grounded in the same transaction or occurrence, and are permitted absent substantial prejudice.

## Conclusion

The court set aside a substantial jury verdict because strict liability was an incorrect legal standard for the alleged gas-well leakage in that setting, while permitting the plaintiffs to pursue amended, potentially permanent-damages claims on remand under a negligence theory subject to evidentiary limits tied to proof of causation and injury.


Williams v. Amoco Prod. Co., 241 Kan. 102, 734 P.2d 1113 (Kan. 1987)