Executive Summary: Key Legal and Evidentiary Issues

• An employee of T.C.O. Agromart Ltd. drove a crop sprayer across a private bridge on Sutton Farms' property, causing a partial collapse that damaged the sprayer.
• Central to the dispute was whether the respondent, as occupier, breached its statutory duty under s. 3(1) of the Occupiers' Liability Act by failing to warn of a hidden structural danger.
• The bridge was sixteen feet wide, but only the centre ten feet were supported by steel beams, leaving a three-foot unsupported overhang on each side — a risk unknown to the appellant's driver.
• Despite knowing about the unsupported overhangs, the respondent never warned the appellant or its employees, and used an alternate bridge when operating wide equipment.
• At trial, the court dismissed the action, finding the driver's inadvertent drift — not the bridge's design or lack of warnings — was the legal cause of the accident.
• On appeal, the Court of Appeal found the trial judge erred by conflating causation with the standard of care and by defining the duty to warn too narrowly.

Facts of the case

T.C.O. Agromart Ltd. provided crop spraying services to Sutton Farms (Nacona) Ltd., a family-operated farm of approximately 1,450 acres near Napanee, Ontario, with fields on both sides of the Napanee River. For approximately twenty years, the respondent had hired the appellant for this work. To provide access between its north and south fields, the farm maintained a private bridge over the river, originally built in the early 1900s and rebuilt in 1980. The reconstruction involved concrete abutments anchoring five steel beams spanning the river; the steel beams covered a total width of ten feet, centred on the bridge. Wood decking was laid over the full length of the bridge — fifty-seven feet long and sixteen feet wide — meaning three feet of wooden deck on each side extended beyond the outermost steel beam with no structural support underneath.

On the day of the accident, Mr. Denyes, an experienced employee of the appellant who had operated the same sprayer for four years and had used the bridge many times, was driving the crop sprayer across the bridge to access fields on the other side. The bridge partially collapsed when he was approximately two-thirds of the way across, and the sprayer fell into the river. Mr. Denyes was initially trapped underwater but escaped without serious injuries; the sprayer, however, was badly damaged. The appellant's insurer brought the action to recover amounts paid out to the appellant.

Statutory duty and the occupier's obligation

The appellant alleged negligence and breach of the statutory duty under s. 3(1) of the Occupiers' Liability Act, R.S.O. 1990, c. O.2 (the "OLA"). That provision states that an occupier of premises owes a duty to take such care as in all the circumstances of the case is reasonable to see that persons entering on the premises, and the property brought on the premises by those persons, are reasonably safe while on the premises. As affirmed by the Supreme Court of Canada in Waldick v. Malcolm, [1991] 2 S.C.R. 456, this duty is not absolute — occupiers are not insurers — but it does impose an affirmative obligation to take reasonable care to protect persons from foreseeable harm. Notably, the duty does not require warnings about obvious and self-evident dangers, but does require disclosure of hidden ones where circumstances warrant.

Reasoning and analysis

The trial judge treated causation as the critical issue and, for efficiency, assumed without deciding that the first three elements of negligence had been established. She found that the driver had inadvertently drifted to the right, bringing the right front tire onto the unsupported overhang, and that the absence of steel beam support was a factual cause of the collapse. However, she declined to find that the lack of warnings was a factual cause, reasoning that a sign warning the driver to stay in the centre would not have prevented the accident since he already knew to keep the sprayer centred. She also found the accident was not legally foreseeable, as the bridge had been used frequently for nearly forty-five years without incident. The action was accordingly dismissed at trial.

On appeal, Justice Osborne, writing for a unanimous Court of Appeal, identified several reviewable errors. First, the trial judge had conflated causation with the standard of care: by asking only whether a sign would have prevented this particular accident, she effectively used the conduct of one injured party to determine the scope of the occupier's general duty to all users of the bridge. Second, the trial judge defined the duty to warn too narrowly — limiting it to a warning to stay centred — when the relevant duty in the circumstances was to disclose the hidden structural danger itself: that the outer three feet on either side of the bridge were completely unsupported. The Court found that, had the appellant and its driver been warned of this hidden danger, they would have had the information needed to make an informed decision about whether to cross the bridge with the sprayer at all.

On factual causation, the Court held that the properly defined duty to warn — disclosing the unsupported overhangs — would have affected the driver's decision to use the bridge in the manner he did, and that causation was therefore established. On legal causation, the Court found a palpable and overriding error in the trial judge's foreseeability analysis. The evidence of Mr. Sutton, the owner, was particularly significant: he and his family were aware of the unsupported overhangs, ensured their equipment wheels stayed on the steel beams, chose not to take certain wide equipment (such as their combine) across the bridge because its wheelbase would not be supported by the steel beams, and used an alternate bridge approximately five hundred metres away when operating wide equipment. Mr. Sutton conceded that observers would perhaps not know that only the middle ten feet of the sixteen-foot-wide bridge were supported, and that no employees of the appellant were ever warned about the unsupported overhangs or prohibited from using the bridge. The Court held that even experienced drivers could foreseeably veer slightly onto the unsupported overhang, and that the absence of prior incidents over nearly forty-five years did not negate that foreseeability.

Ruling and overall outcome

The Court of Appeal allowed the appeal, set aside the trial judgment, and found the respondent liable for breach of s. 3(1) of the OLA. Damages were awarded in favour of the appellant — T.C.O. Agromart Ltd. — in the amount of $423,016.15, comprising $363,326.15 for a replacement sprayer, $51,000 for rental of a temporary sprayer, and $8,690 for sprayer preparation and towing. Appeal costs were fixed at the agreed-upon all-inclusive sum of $25,000, bringing the total award to $448,016.15. Trial costs below were also awarded to the appellant, with the quantum to be agreed upon by the parties or determined by written submissions within seven days of the decision.