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Application of Hawaii Elec. Light Co., Inc.,60 Haw.625 (1979)
<br /> 594 P.2d 612
<br /> Traditionally,electric utilities have used the"declining block"structure in which each classification of customers is divided into
<br /> blocks of consumption so that as more units of electricity are consumed,the cost per unit decreases.HELCO's residential rate
<br /> structure is not a true"declining block" structure as there is a slight rise in the tail block.However,the effect of HELCO's rate
<br /> structure is the same in that the average cost per kilowatt hour declines as more kilowatt hours of electricity are consumed.11
<br /> *644 Historically, the prominent subjects in rate proceedings have concerned the revenue requirement such as allowable
<br /> expenses,rate base and rate of return.The question of rate design was largely left to the discretion of utility managements as it
<br /> was felt that a utility would have no purpose in unfairly allocating among its various customers.See,Cudahy and Malko,Electric
<br /> Peak-Load Pricing:Madison Gas and Beyond, 1976 Wis.L.Rev. 47;Kadane,The Legality of Marginal Cost Pricing for Utility
<br /> Services,5 Hofstra L.Rev.755 (1977);Note,Reform of Electricity Pricing in the United States,25 Buffalo L.Rev. 183 (1975).
<br /> The dramatic increase in rate design issues was the sudden turnaround in the early part of this decade of utility price increases
<br /> rather than the historical experience of declining or stable utility prices.Real prices of coal,oil and natural gas have increased;
<br /> the costs of constructing generating capacity has risen sharply; and legislation and regulation to mitigate the environmental
<br /> impact of large power plants have added new costs that must be met. Federal Energy Administration, Electric Utility Rate
<br /> Design Proposals: Interim Report(1977).
<br /> On appeal, LK alleges that the last three blocks of the declining block residential structure is unreasonably discriminatory
<br /> because the price per kilowatt hour of electricity depends entirely on the level of use; that if that level is low, the customer
<br /> is charged more per kilowatt hour than moderate and high volume users; and that the price discrimination works the greatest
<br /> hardship on the poor.It concedes the presence **625 in the record of substantial evidence to support the customer charge and
<br /> the rate for the 0-100 kilowatt hour block. It contends that the last three blocks violate the law in that a rate schedule must be
<br /> "just and reasonable,and prohibit. . .unreasonable discrimination between. . .consumers."FIHRS s 269-16(b)(1975 Supp.).
<br /> As we have stated earlier in this opinion, our function is not to substitute our judgment for that of the commissioners who
<br /> are experts in the field of rate making,but rather to determine whether the record exhibits substantial factual differences to
<br /> justify the differences among the rates per kilowatt hour charged the low,moderate and high volume *645 electricity users. It
<br /> must be kept in mind that the presumption accorded a commission's order arises only upon compliance with the law and is not
<br /> unassailable. See Southwestern Bell Telephone Co.v. State, 575 P.2d 624 (Ok1.1978);II/Central Kansas Power Co. v. State
<br /> Corporation Commission,221 Kan. 505,561 P.2d 779(1977);Burlington Out Now v.Burlington Northern,Inc.,96 Idaho 594,
<br /> 532 P.2d 936 (1975). Further, while it is true that the burden of showing the impropriety of rates established by a regulatory
<br /> agency lies with the party challenging the rates, Southwestern Bell Telephone Co.v. State, supra,575 P.2d at 628; State ex rel.
<br /> Utilities Commission v. Edmisten, 291 N.C. 424, 230 S.E.2d 647 (1976); Louisiana Power&Light Co. v. Louisiana Public
<br /> Service Commission, supra, La., 343 So.2d at 1044; Alabama Gas Corp.v. Wallace, 293 Ala. 594, 308 So.2d 674 (1975), in
<br /> this case, LK, that burden does not"require of impecunious associations or private citizens a quantum of evidence beyond
<br /> their financial means to marshall."American Public Power Association v. Federal Power Commission, 173 U.S.App.D.C. 36,
<br /> 41, 522 F.2d 142, 147 (1975) (concurring opinion of Judge Bazelon). The presumption of lawfulness and reasonableness of
<br /> findings can be overcome by a showing that no evidence was presented to sustain the order. Legislative Utility Consumers'
<br /> Council v. Public Utilities Commission, N.H., 383 A.2d 89 (1978); Kanawha Valley Transportation Co.v. Public Service
<br /> Commission,W.Va.,219 S.E.2d 332(1975);State ex rel.Utilities Commission v.Edmisten,supra,291 N.C.at 428,230 S.E.2d
<br /> at 650;Norfolk and Western Ry. Co.v. Commonwealth,215 Va.214,207 S.E.2d 883 (1974).
<br /> It is not any discrimination that is forbidden by the law but only those which are unreasonable.If it were otherwise,there would
<br /> be only one rate for all customers,for every classification is in effect a discrimination.
<br /> Given this record,we cannot say that the declining block residential rate structure is unreasonable as a matter of law. We have
<br /> determined,however,that there is no factual basis in the record for the present discrimination in the last three *646 blocks of
<br /> the residential rate structure. HELCO's witness,Kenneth Stretch,testified that the decline in the 300-600 kilowatt hour block
<br /> was justified by a higher load factor 12 of customers consuming electricity in this block.He testified before the Commission that:
<br /> vuESTL AVii CD 2024 Thomson Reuters. No claim to original U.S. Government Works. 11
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