Charter Oak Fire Insurance Company v. The County of Dodge

Background

On August 12, 2022, Bridge 20504, a timber bridge in Dodge County, Minnesota, collapsed while a milling machine operated by Midstate Restoration, Inc. was on it. Midstate was performing asphalt removal work as a subcontractor under Rochester Sand & Gravel, which had contracted with the county for bridge resurfacing.

Charter Oak Fire Insurance Company, as subrogee (meaning it stepped into Midstate's legal shoes after paying Midstate's insurance claim), sued Dodge County for negligence. Charter Oak sought $499,344.00 for the net replacement cost of the destroyed milling machine and $41,586.77 for costs to remove and recover the machine from the riverbed, plus pre- and post-judgment interest, costs, and disbursements.

The Minnesota Department of Transportation (MnDOT) had rated the bridge as "adequate" in inspections in 2013, 2015, 2017, 2019, and 2021, though the 2021 report noted "severe bulging/crushing" on a structural element called Pile 5 of Pier 2.

Key Facts

On August 11, 2022, Midstate operator Jonathan Lyon arrived with a 90,000-pound milling machine and expressed concern about the bridge. County inspector Ryan Baker told Lyon the bridge was rated for 80,000 pounds based on the Bridge Inventory Sheet. Because the 90,000-pound machine exceeded that limit, the parties agreed Midstate would return the next day with a smaller machine.

That evening, county engineer Guy Kohlnhofer sought guidance from MnDOT about the bridge's condition but did not hear back before work resumed the next morning, and he did not communicate this to Baker or others. Kohlnhofer testified that conditions noted in the 2021 report — including "decay," "moderate splitting," "crushing," and "exterior collapse" — were not out of the ordinary for a timber bridge, and that the bridge was in adequate condition at the time.

On August 12, Baker looked up the weight of the replacement milling machine, determined it was under 80,000 pounds, and concluded it was safe to proceed. Shortly after milling began, the bridge collapsed.

Legal Standard

Summary judgment (a ruling without a full trial) is appropriate when there is no genuine dispute about the material facts and the moving party is entitled to win as a matter of law. The court draws all reasonable inferences in favor of the non-moving party — here, Charter Oak.

Official Immunity Under Minnesota Law

Minnesota's common law official immunity doctrine protects public officials from personal liability for actions involving judgment or discretion, unless the official acted willfully or maliciously. The rationale is to prevent officials from second-guessing themselves out of fear of personal liability. Official immunity does NOT apply to ministerial acts — duties that are "absolute, certain, and imperative" and governed by "fixed and designated facts" or "specific written guidelines."

The three-factor test for official immunity under Vassallo ex rel. Brown v. Majeski, 842 N.W.2d 456 (Minn. 2014), looks at: (1) what conduct is at issue; (2) whether that conduct was discretionary or ministerial; and (3) if discretionary, whether it was willful or malicious.

Analysis: Baker

The court concluded Baker's decisions — including determining that milling could safely proceed on August 12 — were discretionary. Baker's written duties as inspector included notifying contractors of nonconforming work and suspending work for safety, but those duties did not specify how to carry them out or what information Baker was required to gather. No fixed policy or written guideline required Baker to independently investigate the bridge's structural condition, call a supervisor, or take any specific verification step before permitting milling to continue. Baker knew the bridge was rated for 80,000 pounds, that 80,000-pound trucks had used it all day on August 11, and that the new milling machine weighed less than 80,000 pounds — and Charter Oak identified no rule dictating how much weight Baker had to give those facts. Because Baker's actions involved independent professional judgment, the court found him protected by official immunity.

Analysis: Kohlnhofer

The court similarly found that Kohlnhofer's actions — including deciding not to personally inspect the bridge and relying on the inspection report — were discretionary. Charter Oak pointed to the MnDOT Bridge Inspection Field Manual, which addresses "severe crushing" of timber piles and requires structural review and repairs. The court, however, noted that the 2021 report used the phrase "severe bulging/crushing," and that "bulging" and "crushing" have distinct technical meanings; the Field Manual's requirement applied specifically to "severe crushing" and not to "severe bulging" or unqualified references to "crushing." The court further noted that no rule obligated Kohlnhofer to verify the accuracy of inspection report language or resolve ambiguous terms. Kohlnhofer exercised professional judgment in deciding whether to personally inspect the bridge or request a load rating, and the court found his actions protected by official immunity.

Vicarious Immunity for the County

Under Minnesota law, when a public employee is found to be immune from suit, the government employer is generally also vicariously (derivatively) immune. Because both Baker and Kohlnhofer were immune, the court held Dodge County was vicariously immune as well.

Disposition

The court granted the County's Motion for Summary Judgment. Charter Oak's complaint was dismissed with prejudice. The court declined to address the county's alternative arguments based on statutory immunity and the public duty doctrine.