Moreover, in reviewing orders of the Interstate Commerce Commission, the Court, at least in earlier years,[209] chose to be guided by approximately the same standards of appraisal as it had originally formulated for examining regulations of State commissions; and inasmuch as the following excerpt from its holding in Interstate Commerce Commission v. Union Pacific R. Co.[210] represents an adequate summation of the law as it stood prior to 1920, it is set forth below: "* * * questions of fact may be involved in the determination of questions of law, so that an order, regular on its face, may be set aside if it appears that the rate is so low as to be confiscatory * * *; or if the Commission acted so arbitrarily and unjustly as to fix rates contrary to evidence, or without evidence to support it; or if the authority therein involved has been exercised in such an unreasonable manner as to cause it to be within the elementary rule that the substance, and not the shadow, determines the validity of the exercise of the power. * * * In determining these mixed questions of law and fact, the Court confines itself to the ultimate question as to whether the Commission acted within its power. It will not consider the expediency or wisdom of the order, or whether, on like testimony, it would have made a similar ruling. * * * [The Commission's] conclusion, of course, is subject to review, but when supported by evidence is accepted as final; not that its decision, * * *, can be supported by a mere scintilla of proof—but the courts will not examine the facts further than to determine whether there was substantial evidence to sustain the order."
The Ben Avon Case
These standards of review were abruptly rejected by the Court in Ohio Valley Water Company v. Ben Avon Borough,[211] decided in 1920, as being no longer sufficient to satisfy the requirements of due process. Unlike previous litigation involving allegedly confiscatory rate orders of State commissions, which had developed from rulings of lower federal courts in injunctive proceedings, this case reached the Supreme Court by way of appeal from a State appellate tribunal;[212] and although the latter did in fact review the evidence and ascertained that the State commission's findings of fact were supported by substantial evidence, it also construed the statute providing for review as denying to State courts "the power to pass upon the weight of such evidence." Largely on the strength of this interpretation of the applicable State statute, the Supreme Court held that when the order of a legislature, or of a commission, prescribing a schedule of maximum future rates is challenged as confiscatory, "the State must provide a fair opportunity for submitting that issue to a judicial tribunal for determination upon its own independent judgment as to both law and facts; otherwise the order is void because in conflict with the due process clause, Fourteenth Amendment."
Without departing from the ruling, previously enunciated in Louisville & N.R. Co. v. Garrett,[213] that the failure of a State to grant a statutory right of judicial appeal from a commission's regulation is not violative of due process as long as relief is obtainable by a bill in equity for injunction, the Court also held that the alternative remedy of injunction expressly provided by State law did not afford an adequate opportunity for testing judicially a confiscatory rate order. It conceded the principle stressed by the dissenting Justices that "where a State offers a litigant the choice of two methods of judicial review, of which one is both appropriate and unrestricted, the mere fact that the other which the litigant elects is limited, does not amount to a denial of the constitutional right to a judicial review."[214]
History of the Valuation Question
For almost fifty years the Court was to wander through a maze of conflicting formulas for valuing public service corporation property only to emerge therefrom in 1944 at a point not very far removed from Munn v. Illinois.[215] By holding, in 1942, in Federal Power Commission v. Natural Gas Pipeline Co.,[216] that the "Constitution does not bind rate-making bodies to the service of any single formula or combination of formulas," and in 1944, in Federal Power Commission v. Hope Gas Co.,[217] that "it is the result reached not the method employed which is controlling, * * * [that] it is not the theory but the impact of the rate order which counts, [and that] if the total effect of the rate order cannot be said to be unjust and unreasonable, judicial inquiry under the Act is at an end," the Court, in effect, abdicated from the position assumed in the Ben Avon Case.[218] Without surrendering the judicial power to declare rates unconstitutional on grounds of a substantive[219] deprivation of due process, the Court announced that it would not overturn a result deemed by it to be just simply because "the method employed [by a commission] to reach that result may contain infirmities. * * * [A] Commission's order does not become suspect by reason of the fact that it is challenged. It is the product of expert judgment which carries a presumption of validity. And he who would upset the rate order * * * carries the heavy burden of making a convincing showing that it is invalid because it is unjust and unreasonable in its consequences."[220]
In dispensing with the necessity of observing any of the formulas for rate computation which previously had currency, the Court did not undertake to devise, by way of substitution, any discernible guide to aid it in ascertaining whether a so-called end result is unreasonable. It did intimate that rate-making "involves a balancing of the investor and consumer interests," which does not, however, "'insure that the business shall produce net revenues,' * * * From the investor or company point of view it is important that there be enough revenue not only for operating expenses but also for the capital costs of the business. These include service on the debt and dividends on the stock. * * * By that standard the return to the equity owner should be commensurate with returns on investments in other enterprises having corresponding risks. That return, moreover, should be sufficient to assure confidence in the financial integrity of the enterprise, so as to maintain its credit and to attract capital."[221] Nevertheless, in the light of the court's concentration on the reasonableness of the final result rather than on the correctness of the methods employed to reach that result, it is conceivable that methods or formulas, now discredited in whole or in part, might continue to be observed by State commissions in drafting rate orders that will prove to be justiciably sustainable.[222]