I.
Appellants argue that the Commission erred in including the sum of $144,841,000 in Duke’s retail rate base for construction work in progress (hereinafter CWIP) because its findings on this matter were inadequate as a matter of law. Appellants base their argument on both G.S. § 62-79(a) and G.S. § 62-133(b)(l) (1977) (amended 1981). Each statute will be considered separately.
G.S. § 62-79(a) provides that:
All final orders and decisions of the Commission shall be sufficient in detail to enable the court on appeal to determine the controverted questions presented in the proceedings and shall include:
(1) Findings and conclusions and the reasons or bases therefor upon all the material issues of fact, law, or discretion presented in the record, and
(2) The appropriate rule, order, sanction, relief or statement of denial thereof.
The appellants contend that the final order of the Commission falls short of this standard because its finding of Fact Number 7 is simply a recitation of the factors in G.S. § 62-133 (b)(1). 1 We disagree.
The purpose of the findings required by G.S. § 62-79(a) is to provide the reviewing court with sufficient information to allow it to determine the controverted questions presented in the proceedings. In the section of its order entitled “Evidence and Conclusions for Finding of Fact No. 7” the Commission summarized and rejected the statutory interpretation arguments made by the appellants. The Commission then concluded that all of Duke’s CWIP expenditures, in particular those for the Cherokee plant and allowance for funds used during construction accrued after 1 July 1979, were reasonable and prudent expenditures under G.S. § 62-133(b)(l). The Commission further concluded that the expenditures were needed to insure adequate service to Duke’s customers in the future. The Court of Appeals properly noted that such scant findings and conclusions barely pass muster.
State ex rel. Utilities Commission v. Conservation Council,
A somewhat more difficult issue is posed by appellants’ contention that G.S. § 62-133(b)(l) first requires the Commission to make findings on the reasonableness and prudence of including CWIP expenses in the rate base before it considers the reasonableness of the CWIP costs incurred. G.S. § 62-133(b)(l) as it read at the relevant time provides that the Commission shall:
Ascertain the reasonable original cost of the public utility’s property used and useful, or to be used and useful within areasonable time after the test period, in providing the service rendered to the public within this State .... In ascertaining the cost of the public utility’s property, construction work in progress as of the effective date of this subsection shall be excluded until such plant comes into service but reasonable and prudent expenditures for construction work in progress after the effective date of this subsection shall be included subject to the provisions of subparagraph (b)(5) 2 of this section.
Appellants argue that before the Commission may include CWIP expenses in the rate base it must first find that the plant under construction is necessary and will be completed in a reasonable time.
We hold that G.S. § 62-133(b)(l) does not require the Commission to make new findings on the need for the construction. Before any public utility begins the construction of a facility for generating electricity for use by the public it must first obtain from the Commission a certificate stating that “public convenience and necessity requires, or will require such construction.” G.S. § 62-110.1(a). Before such a certificate can be granted the applicant must file an estimate of construction costs and the Commission must hold public hearings. G.S. § 62-110.1(e). This procedure satisfies appellant’s argument that the construction must be necessary.
The wording used by the legislature makes it clear that the Commission must include all reasonable CWIP expenditures in the rate base. The only matter left to the discretion of the Commission is whether such expenditures are reasonable and prudent. Evidence of whether the plant under construction will be completed within a reasonable time is pertinent to deciding if expenditures for such construction are reasonable and prudent. While it is the better practice for the Commission to specifically find that the construction will be completed within a reasonable time, the statute does not require it so long as there is evidence in the record that the plant would be completed within a reasonable time. There was sufficient evidence in the record to allow the Commission to conclude that the Cherokee units would be completed within a reasonable time. We are not persuaded by the appellants’ argument that the Commission must make findings as to the cost of each project and when it will be needed. Nowhere in G.S. § 62-133(b)(l) is there such a requirement. To require such extensive evidence would put an undue burden on Duke and cause the ratemaking process to be more time consuming and difficult of administration.
Costs are presumed to be reasonable unless challenged.
Utilities Commission v. Intervenor Residents,
II.
We next turn to the portion of CWIP expenditures ($103,880,000) related to the Cherokee Nuclear Station. G.S. § 62-133(b)(l) requires that expenses added to the rate base to represent the costs of construction must come from construction work that is in progress. Appellants argue that work had ceased on Cherokee by the time the hearings were held because Duke had indefinitely delayed construction and had no target date for completion. Work on unit two had been terminated and work on unit one was reduced to a bare minimum. Also, Duke’s witness acknowledged that the company had not yet decided
We note that before this appeal reached the Court of Appeals Duke had abandoned the Cherokee Nuclear Station. G.S. § 62-93 provides that a reviewing court may, in its discretion, remand a case for further consideration by the Commission if evidence has been discovered since the hearing before the Commission “that could not have been obtained for use at that hearing by the exercise of reasonable diligence, and will materially affect the merits of the case, . . .” The question before the Commission to which this evidence applies is whether the construction done at Cherokee Nuclear Station was in progress during the test year ending 31 December 1980. After considering the evidence we hold that the subsequent cancellation of Cherokee does not materially affect the Commission’s determination that the Cherokee Nuclear Station was construction work in progress during the test year. Therefore, we decline to remand the case for further consideration of this issue.
The validity of the Commission’s findings and conclusions must be determined in light of the evidence that was presented to it. There was evidence before the Commission from which it could reasonably conclude that the delay in the construction of Cherokee was due to economic conditions and that Duke intended to complete Cherokee once its financial circumstances enabled it to do so. The Commission was also made aware of the possibility that the uncertain economic conditions prevailing at the time might force Duke to cancel Cherokee. Further, the Court of Appeals correctly pointed out that Duke’s failure to specify a definite completion date is irrelevant because the statute does not require it. Based on a review of the entire record, we hold that the Commission’s finding and conclusion that construction work was in progress at Cherokee and that the costs should be included in Duke’s rate base is supported by competent, material, and substantial evidence and so is binding on this Court.
Utilities Commission v. Intervenor Residents,
III.
Appellants next argue that the Commission erred in including in Duke’s rate base $29,685,371 of allowance for funds used during construction (hereinafter AFUDC) which was entered on Duke’s books after 1 July 1979 but accrued on construction work that occurred prior to that date. CWIP expenses that occur before 1 July 1979 are to be excluded from the rate base until such plant comes into service. G.S. § 62433(b)(1). Appellants argue that the $29,685,371 AFUDC occurred before 1 July 1979 and so is not includable as a CWIP expense.
For a better understanding of this issue a brief explanation of AFUDC is in order. Before the 1977 amendment of G.S. § 62433(b)(1), utilities were not allowed to include CWIP in their rate base. Instead, a utility would add together all of the costs incurred by a project each year and multiply that by the AFUDC rate. The AFUDC rate is a rate of interest which represents as nearly as possible the actual cost of money used for construction. The figure that results from multiplying the costs times the AFUDC rate is capitalized annually until the plant comes into service and is then recovered along with the original costs of the plant.
Appellants contend that the AFUDC expenses in question are not includable for several reasons. First, AFUDC expenses in North Carolina have not been recoverable
Prior to the effective date of the statute AFUDC was treated as a part of the cost of the plant. As Justice Lake stated in
Utilities Commission v. Morgan,
IV.
The final issue in this case briefed and argued by the parties concerns this Court’s power to direct the Commission to order refunds from rates established by final order of the Commission. Duke argues that such refunds cannot be granted because to do so would constitute retroactive rate making prohibited under the North Carolina Statutes. We hold that the law is otherwise and affirm this Court’s power to direct the Commission to order refunds.
“[Retroactive rate making occurs when, . . . the utility is required to refund revenues collected, pursuant to the then lawfully established rates, for such past use.”
Utilities Comm. v. Edmisten,
Duke contends that the statutes limit any relief that this Court might give to prospective relief. In support Duke relies on the dichotomy between rates fixed by the Commission and those which are simply allowed to go into effect. Rates established by the Commission are deemed to be just and reasonable. G.S. § 62-132. Rates which the Commission simply allows to go into effect may be challenged by interested parties or the Commission, and after a hearing the Commission may order a refund if it finds the rates to be different from those established by the Commis
sion and unjust or unreasonable.
Utilities Comm. v. Edmisten,
Duke concedes that G.S. §§ 62430(e), 132 and 136 grant specific authority to the Commission to order refunds. However, Duke argues that G.S. § 62-94 which sets out the extent of appellate review prevents this Court from ordering refunds because it does not specifically grant such
V.
We next turn to the Commission’s determination of Duke’s reasonable operating expenses as required by G.S. § 62-133. Neither party has argued this issue, but we will address it because of Chief Judge Vaughn’s dissent. In determining Duke’s base fuel cost the Commission relied on a fuel cost previously set in an expedited fuel cost proceeding pursuant to G.S. § 62434(e) (Supp. 1979) (repealed 1982). In the expedited fuel cost proceeding the Commission had set Duke’s fuel costs at 1.4660 cents per kWh. In its order the Commission reduced the base fuel cost to 1.3093 cents per kWh by subtracting .1567 cents kWh for fuel savings related to the operation of the McGuire unit from the 1.4660 cents per kWh cost. The Public Staffs recommended fuel cost was also based on a G.S. § 62434(e) proceeding. There was some testimony concerning the reasonableness of Duke’s fuel costs in curred over the twelve month test period, but there is no indication in the Commission’s order that it ever ruled on the reasonableness of the fuel costs. The Court of Appeals remanded the case for further findings on the reasonableness of Duke’s fuel costs because the absence of proper findings frustrates appellate review. G.S. § 62-94(b)(4). We agree.
The purpose of the expedited fuel proceeding was to allow a utility to change its rates based solely on fluctuations in fuel costs. The reasonableness of the utility’s base fuel costs are not to be considered.
Utilities Commission v. Public Staff,
VI.
Lastly, we note that the portion of the Court of Appeals’ opinion dealing with the inclusion of McGuire Unit One in the rate base and the separate hearing concerning McGuire has not been challenged by any of the parties. We find no error on these points.
The decision of the Court of Appeals is
Affirmed in part and reversed in part.
Notes
. 7. The reasonable original cost of Duke’s property used and useful, or to be used and useful within a reasonable time after the test period, in providing the service rendered to the public within this State, less that portion of the cost which has been consumed by previous use recovered by depreciation expense, plus the reasonable original cost of investment in plant under construction (construction work in progress of CWIP) less cost-free capital is $2,138,009,000.
. The reference to subsection (b)(5) in the Michie Company version of the General Statutes appears to be a typographical error even though it is confirmed by 1977 N.C. Sess. Laws c. 691, s. 2. The reference should be to G.S. § 62-133(b) (4a).
