Midland Realty Co. v. Kansas City Power & Light Co.

Background

A steam company (the plaintiff) agreed to furnish steam heat to a Kansas City building owner (the defendant) under a five-year contract, which the defendant extended. After Missouri created a public service commission, the utility filed new, higher published steam rates effective August 1, 1917. The commission adjusted those rates twice, setting new effective dates. The utility billed under its filed schedules; the customer paid only the old contract rate. After the contract ended, the utility sued to recover the higher charges for the relevant periods.

Reasoning

The core question was whether Missouri’s statute and the commission’s orders could lawfully replace private contract rates without breaking the Constitution’s rule against laws that impair contracts or the Fourteenth Amendment’s protection against unfair deprivation of property. The Supreme Court accepted the state supreme court’s reading that rates set under the statute supersede prior contract rates. The Court explained the State may require published, nondiscriminatory rates, forbid rates too low to cover proper costs, and that the customer had the opportunity to challenge filed rates before the commission and in state court but failed to do so. For those reasons, the Court ruled for the utility.

Real world impact

The decision confirms that when a state law so provides, regulators can set utility rates that override earlier private agreements, and customers must use the regulatory process to contest rates rather than refuse payment. It reinforces regulators’ authority to adjust rates to prevent economically unsustainable service and directs parties to raise disputes promptly before the commission and courts.