In County of Dallas v. Mackenzie, the United States Supreme Court was asked to decide whether a county could be held liable for damages caused by a defective bridge. The plaintiff, Mackenzie, had been injured when his horse and wagon fell through a bridge that had been built by the county. The county argued that it was not liable for the damages because it had not been negligent in constructing the bridge. The Supreme Court held that the county was liable for the damages caused by the bridge. The Court reasoned that the county had a duty to maintain the bridge in a safe condition, and that it had breached this duty by failing to inspect the bridge and repair any defects. The Court also noted that the county had been aware of the defect in the bridge, but had failed to take any action to repair it. The Court concluded that the county was liable for the damages caused by the bridge, and that Mackenzie was entitled to recover the damages he had suffered. This case established that a county can be held liable for damages caused by a defective bridge, even if it was not negligent in constructing the bridge.

Justice Field delivered the dissenting opinion in County of Dallas v. Mackenzie, arguing that a state court had no authority to issue an injunction against a county for failing to pay its debts. He argued that the Texas Constitution did not give any power or jurisdiction to courts over counties and their debt obligations, so it was unconstitutional for the state court to have issued such an injunction. Furthermore, he argued that even if there were some constitutional basis for issuing such an injunction, it would still be invalid because it violated due process by interfering with contracts between private parties without proper notice or hearing. Justice Field concluded his dissent by noting that while states may have certain powers over local governments when necessary and appropriate, they must always act within constitutional limits and respect individual rights as guaranteed under federal law.