In re Application of Suburban Natural Gas Co. (Slip Opinion) , 2021 Ohio 3224 ( 2021 )


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  • [Until this opinion appears in the Ohio Official Reports advance sheets, it may be cited as In
    re Application of Suburban Natural Gas Co., Slip Opinion No. 
    2021-Ohio-3224
    .]
    NOTICE
    This slip opinion is subject to formal revision before it is published in an
    advance sheet of the Ohio Official Reports. Readers are requested to
    promptly notify the Reporter of Decisions, Supreme Court of Ohio, 65
    South Front Street, Columbus, Ohio 43215, of any typographical or other
    formal errors in the opinion, in order that corrections may be made before
    the opinion is published.
    SLIP OPINION NO. 
    2021-OHIO-3224
    IN RE APPLICATION OF SUBURBAN NATURAL GAS COMPANY FOR AN INCREASE
    IN GAS DISTRIBUTION RATES, FOR TARIFF APPROVAL, AND FOR APPROVAL OF
    CERTAIN ACCOUNTING AUTHORITY; OFFICE OF OHIO CONSUMERS’ COUNSEL,
    APPELLANT; PUBLIC UTILITIES COMMISSION, APPELLEE; SUBURBAN NATURAL
    GAS COMPANY, INTERVENING APPELLEE.
    [Until this opinion appears in the Ohio Official Reports advance sheets, it
    may be cited as In re Application of Suburban Natural Gas Co., Slip Opinion
    No. 
    2021-Ohio-3224
    .]
    Public utilities—R.C. 4909.15(A)(1)—Gas pipeline—When fixing rates for service,
    Public Utilities Commission must determine the valuation of the property
    of the public utility that is used and useful in rendering the public-utility
    service as of the date certain—To be useful, the property must be beneficial
    in rendering service for the convenience of the public as of the date
    certain—Public Utilities Commission applies an incorrect formula when it
    considers whether the utility’s investment is prudent.
    (No. 2020-0781—Submitted March 3, 2021—Decided September 21, 2021.)
    SUPREME COURT OF OHIO
    APPEAL from the Public Utilities Commission of Ohio,
    Nos. 18-1205-GA-AIR, 18-1206-GA-ATA, and 18-1207-GA-AAM.
    _______________________
    DEWINE, J.
    {¶ 1} This is an appeal from a decision of the Public Utilities Commission
    of Ohio (“PUCO”) allowing a gas company to charge its customers higher rates.
    At issue is whether the gas company’s customers must pay for a 4.9-mile extension
    of the gas company’s pipeline. To decide this point, the PUCO was required by
    statute to determine whether the pipeline extension was “used and useful” as of a
    specified date. R.C. 4909.15(A)(1). The PUCO determined that the extension met
    this “used-and-useful” test and approved the rate increase.
    {¶ 2} The Office of the Ohio Consumers’ Counsel opposed the rate increase
    before the PUCO and maintains its challenge on appeal. In its view, only two miles
    of the extension were used and useful and thus the PUCO erred by approving a rate
    increase based upon the entire 4.9-mile extension. We conclude that the PUCO did
    err: in evaluating the rate increase, the PUCO looked beyond whether the entire
    extension was used and useful on the applicable date and considered whether it was
    a prudent investment because it might prove useful in the future. As a consequence,
    we reverse the PUCO’s decision and remand the case for a proper application of
    the used-and-useful test.
    I. Suburban builds a 4.9-mile pipeline extension
    {¶ 3} The Suburban Natural Gas Company provides natural gas distribution
    services to residential customers in Delaware and Marion Counties, an area that has
    been experiencing significant population growth. On one extremely cold day in the
    winter of 2015, pressure in part of Suburban’s pipeline dropped below 100 pounds
    per square inch gauge (“psig”). This was concerning—we are told 100 psig is
    considered the minimum pressure necessary for that part of the pipeline to maintain
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    January Term, 2021
    safe, reliable service. At lower pressure levels, there is a risk of the pipeline
    freezing over, causing an outage that could take weeks to repair.
    {¶ 4} Suburban hired an engineering firm to look at the problem. The
    engineers performed modeling work, examining Suburban’s system and taking into
    account projected growth in Suburban’s customer base.               Ultimately, they
    determined that by 2018 on an extremely cold day (when the demand for gas was
    at its highest), pressure in the pipeline would dip to 104 psig, just above the 100-
    psig minimum operating pressure. By the end of 2019, the engineers projected, the
    pressure could drop below 78 psig.
    {¶ 5} Based on the results of this modeling, Suburban decided to build a
    4.9-mile pipeline extension that would be completed in time for the 2018-2019
    winter. Pipeline construction must be approved by the Ohio Power Siting Board.
    See R.C. 4906.04. But by keeping the extension below five miles, Suburban was
    able to take advantage of an expedited approval process before the Power Siting
    Board. See R.C. 4906.03(F)(3); Ohio Adm.Code 4906-6-10. The Power Siting
    Board approved the extension. The board’s staff report warned, however, that the
    extension might be longer than needed to serve current and future customers and
    that Suburban’s cost recovery hinged on being able to demonstrate in a future rate
    case that the extension was not overbuilt. After receiving the Power Siting Board’s
    signoff, Suburban built the extension and placed it into service on February 22,
    2019.
    II. Proceedings before the PUCO
    {¶ 6} While construction was underway, Suburban filed an application with
    the PUCO for a rate increase to cover the costs of the pipeline extension. Its
    proposed rate increase was based on a projected value of $8.9 million for the 4.9-
    mile extension.
    {¶ 7} In weighing such requests, the PUCO is required to determine “[t]he
    valuation as of the date certain of the property of the public utility used and useful
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    SUPREME COURT OF OHIO
    or * * * projected to be used and useful as of the date certain, in rendering the public
    utility service.” R.C. 4909.15(A)(1). In this case, the PUCO determined that date
    certain to be February 28, 2019.
    {¶ 8} The Consumers’ Counsel is the statewide legal representative for
    Ohio’s residential ratepayers. R.C. 4911.02(B). It intervened in the proceedings at
    the PUCO and argued that Suburban had admitted that at most only two miles of
    the pipeline were used and useful as of February 28, 2019.
    {¶ 9} After completing an investigation of Suburban’s application, the staff
    of the PUCO instituted settlement discussions. Ultimately, Suburban and the
    PUCO staff entered into a settlement agreement that did not include the Consumers’
    Counsel. Under the settlement, the staff approved the rate increase based on the
    entire 4.9-mile extension and Suburban agreed to phase in the increase over a period
    of three years.
    {¶ 10} Settlement agreements of this type must be approved by the PUCO.
    See Ohio Adm.Code 4901-1-30. The Consumers’ Counsel filed objections to the
    agreement, arguing that the pipeline extension was not used and useful.
    {¶ 11} The PUCO overruled the objections and approved the settlement. In
    doing so, the PUCO credited testimony from the engineering firm hired by
    Suburban. Based on this testimony, the PUCO noted that by the 2018-2019 winter,
    “assuming a negative five-degree temperature, additional capacity” was required to
    ensure adequate pressure in the system. Pub. Util. Comm. Nos. 18-1205-GA-AIR,
    18-1206-GA-ATA, and 18-1207-GA-AAM, ¶ 121 (Sept. 26, 2019). It further
    pointed out that according to Suburban, pressure in the system dropped to 105 psig
    on January 21, 2019—a month before the extension was placed into service.
    {¶ 12} The Consumers’ Counsel did not offer its own engineering expert.
    Rather, it sought to use testimony from Suburban’s expert to argue that the 4.9-mile
    extension was significantly longer than was required to meet Suburban’s needs in
    February 2019. This engineer said he believed he had done modeling for a two-
    4
    January Term, 2021
    mile extension. He further indicated that a two-mile extension seemed to be enough
    for the 2018-2019 winter season. He then remarked that his modeling was focused
    on ensuring Suburban got longevity out of the pipeline so that Suburban would not
    “have to come back the next year and start building again.” The Consumers’
    Counsel also pointed to testimony that the extension would allow Suburban to serve
    4,000 to 20,000 more customers in addition to the 13,500 customers that Suburban
    had on the date certain. It further noted that after the extension was completed, the
    actual pressure in the pipeline was measured at 250 psig, well above the minimum
    needed for safe, reliable service.
    {¶ 13} The PUCO rejected the Consumers’ Counsel’s claim that only a two-
    mile extension was called for, opining:
    With regard to [the Consumers’ Counsel’s] argument about
    the precise length of the extension, we find that, while a two-mile
    extension may have served customers through the 2018-2019
    winter, Suburban would need to immediately initiate the [Power
    Siting Board] regulatory process again to build additional pipeline
    to ensure adequate capacity to serve existing customers soon after.
    This approach would also increase the overall cost of necessary
    improvements to Suburban’s distribution system, thereby increasing
    the rates customers pay. Importantly, [the National Association of
    Regulatory Utility Commissioners’] guidance on this matter notes
    that “utility investment is often lumpy in nature, such that it may be
    cost ineffective to add small increments of plant and equipment each
    year, rather than building to meet a longer growth horizon.”
    Pub. Util. Comm. Nos. 18-1205-GA-AIR, 18-1206-GA-ATA, and 18-1207-GA-
    AAM, at ¶ 125 (Sept. 26, 2019).
    5
    SUPREME COURT OF OHIO
    {¶ 14} The PUCO denied the Consumers’ Counsel’s application for
    rehearing. The Consumers’ Counsel then appealed to this court, advancing two
    propositions of law. In its first, it argues that the PUCO erred by allowing Suburban
    to charge customers for property that might be useful in the future but which was
    not useful on the date certain. In its second, it contends that the PUCO’s decision
    was against the manifest weight of the evidence.
    III. The PUCO erred in looking beyond the date certain when
    it approved the rate increase
    {¶ 15} The PUCO is tasked with “fixing and determining just and
    reasonable rates” for a public utility’s service. R.C. 4909.15(A). In doing so, it
    must follow a ratemaking formula set out in that statute. In re Application of Duke
    Energy Ohio, Inc., 
    150 Ohio St.3d 437
    , 
    2017-Ohio-5536
    , 
    82 N.E.3d 1148
    , ¶ 16.
    Part of this formula tells the PUCO to determine “[t]he valuation as of the date
    certain of the property of the public utility used and useful * * * in rendering the
    public utility service for which rates are to be fixed and determined.” R.C.
    4909.15(A). This valuation, known as the “rate base,” “represents the public
    utility’s investment in real property, facilities (power plants, pipelines, poles, and
    wires), and other equipment (computers and software) it uses to serve customers.”
    In re Duke Energy Ohio at ¶ 19.
    {¶ 16} The “date certain” is the date on which the utility property is assessed
    to determine whether it is used and useful. R.C. 4909.15(A)(1). The PUCO sets
    the date certain, though the date is “determined essentially by the date at which the
    utility files its application for a rate increase.” Ohio Edison Co. v. Pub. Util.
    Comm., 
    63 Ohio St.3d 555
    , 559, 
    589 N.E.2d 1292
     (1992).
    A. The used-and-useful test
    {¶ 17} The used-and-useful test allows a public utility to recover through
    rates the value of that portion of its property that is “ ‘actually used and useful for
    the convenience of the public.’ ” Cincinnati v. Public Util. Comm., 
    113 Ohio St. 6
    January Term, 2021
    259, 
    148 N.E. 817
     (1925), syllabus, quoting G.C. 614-23. Whether something is
    used and useful must be measured “ ‘as of the date certain,’ not at some speculative
    unspecified point in time.” Office of Consumers’ Counsel v. Pub. Util. Comm., 
    67 Ohio St.2d 303
    , 309, 
    423 N.E.2d 1082
     (1981), quoting R.C. 4909.15(A)(1). Thus,
    a public utility is not entitled to include in the rate-base valuation “property not
    actually used or useful in providing its public service, no matter how useful the
    property may have been in the past or may yet be in the future.” Office of
    Consumers’ Counsel v. Pub. Util. Comm., 
    58 Ohio St.2d 449
    , 453, 
    391 N.E.2d 311
    (1979).
    {¶ 18} The used-and-useful test has been a feature of ratemaking in Ohio
    since 1911. H.B. No. 325, 102 Ohio Laws 549, 556-557 (enacting G.C. 614-23,
    predecessor section to R.C. 4909.15). The test has its genesis in the United States
    Supreme Court’s decision in Smyth v. Ames, 
    169 U.S. 466
    , 
    42 L.Ed. 819
    , 
    18 S.Ct. 418
     (1898). In that case, the court articulated a constitutional standard for public-
    utility ratemaking that required that a utility receive a fair market value of the
    property being used “for the convenience of the public.” Id. at 546. In the court’s
    view, anything less would have led to an unconstitutional taking. See id. at 523;
    see also Jersey Cent. Power & Light Co. v. Fed. Energy Regulatory Comm., 
    810 F.2d 1168
    , 1175 (1987) (Robert Bork, J.) (discussing Smyth).
    {¶ 19} Smyth’s holding presented a two-way street. On one side, customers
    had to pay for the property they used for their benefit. See Smyth at 547. On the
    other, a public utility could not receive compensation for property that did not
    benefit its customers. See 
    id.
     “Fair value” compensation was therefore due only
    for property used and useful for the convenience of the public. See Jersey Cent.
    Power at 1175.
    {¶ 20} The Supreme Court has long since abandoned the used-and-useful
    test as a constitutional mandate, requiring only the end result that ratemaking be
    “just and reasonable.” See Duquesne Light Co. v. Barasch, 
    488 U.S. 299
    , 310, 109
    7
    SUPREME COURT OF OHIO
    S.Ct. 609, 
    102 L.Ed.2d 646
     (1989), citing Fed. Power Comm. v. Hope Natural Gas
    Co., 
    320 U.S. 591
    , 
    64 S.Ct. 281
    , 
    88 L.Ed. 333
     (1944). Nevertheless, the test
    continues to be the standard that the Ohio legislature has chosen to determine
    whether a public utility may properly charge ratepayers for its capital investment.
    B. What it means to be “useful”
    {¶ 21} Here, there is no question that the entire 4.9-mile pipeline extension
    was used on the date certain—gas unquestionably flowed through the pipeline
    extension. The question is whether the 4.9-mile extension was useful. Though the
    Consumers’ Counsel concedes that two miles of the extension were useful as of the
    date certain, it disputes the usefulness of the pipeline extension’s remaining 2.9
    miles.
    {¶ 22} The word “useful” is not defined by the statute. When a word is
    undefined, we look to its plain, everyday meaning. Great Lakes Bar Control, Inc.
    v. Testa, 
    156 Ohio St.3d 199
    , 
    2018-Ohio-5207
    , 
    124 N.E.3d 803
    , ¶ 8. But looking
    at the ordinary meaning of a word in isolation will not suffice. We instead must
    consider the word’s ordinary meaning as used in the surrounding text. 
    Id.
    {¶ 23} “Useful” can be understood a few different ways. It is defined as (1)
    “capable of being put to use”; (2) “having utility”; (3) “ADVANTAGEOUS; esp :
    producing or having the power to produce good”; and (4) “serviceable for a
    beneficial end or object.” Webster’s Third New International Dictionary 2524
    (2002).
    {¶ 24} On one hand, then, labeling something “useful” can refer to that
    thing’s capacity to be put to use. But that understanding makes little sense here
    because the statute also refers to property that is used. Presumably, “used” property
    is always capable of being put to use. So, understanding “useful” in this sense
    would render the word redundant.
    {¶ 25} That leaves us with the far more sensible conclusion that “useful” in
    the statute means “advantageous” or “beneficial.”           Nothing in the statutory
    8
    January Term, 2021
    framework suggests deviating from the everyday meaning of the word. And
    because assessing whether property is useful ensures “the reasonableness and
    justice of rates and charges for the service rendered by the public utilities,” see R.C.
    4909.04, the property must be beneficial in rendering service for the convenience
    of the public as of the date certain. Columbus v. Pub. Util. Comm. of Ohio, 
    62 Ohio St.3d 430
    , 436, 
    584 N.E.2d 646
     (1992).
    {¶ 26} With a proper understanding of the term “useful” in mind, we turn
    to the Consumers’ Counsel’s challenge to the PUCO’s order.
    C. The PUCO misapplied the used-and-useful test when it looked beyond the date
    certain and considered whether Suburban’s investment was prudent
    {¶ 27} The PUCO concluded that the 4.9-mile pipeline extension was used
    and useful on the date certain based on modeling that showed that without
    additional capacity, the pipeline was at risk of falling below minimally adequate
    pressure levels during the 2018-2019 winter. But that evidence showed only that
    the existing pipeline would soon be inadequate and that some extension was
    necessary; it didn’t address the Consumers’ Counsel’s contention that Suburban
    built far more than necessary.
    {¶ 28} In regard to the “precise length” of the extension, the PUCO looked
    not at the extension’s date-certain usefulness, but at its potential to save time and
    money in the future. The PUCO conceded a two-mile extension may have been
    adequate to serve customers as of the date certain but worried that soon thereafter
    Suburban would have had to seek regulatory approval for another extension. It also
    cited guidance from the National Association of Regulatory Utility Commissioners
    that “ ‘it may be cost ineffective to add small increments of plant and equipment
    each year, rather than building to meet a longer growth horizon.’ ”
    {¶ 29} The problem is that such considerations go beyond the used-and-
    useful test. The test measures usefulness as of the date certain, “not at some
    speculative unspecified point in time.” Office of Consumers’ Counsel, 
    67 Ohio 9
    SUPREME COURT OF OHIO
    St.2d at 309, 
    423 N.E.2d 1082
    . By speculating about the pipeline extension’s
    potential for saving time and money in the long run, the PUCO looked beyond the
    date certain, February 28, 2019, to find the disputed 2.9 miles useful.
    {¶ 30} The PUCO contends it reasonably interpreted the meaning of
    “useful” to “include a prudently-designed pipeline extension” that would
    “minimize regulatory and construction costs.” But we have never interpreted the
    term “used and useful” to encompass capital facilities that are not presently useful,
    even if it might be cheaper to construct them now. To the contrary, we have held
    that the PUCO exceeds its statutory mandate when incorporating into the rate base
    “unfinished projects ineligible for rate base treatment [even] if the original decision
    to build the facilities and the subsequent decision to cancel the projects are prudent
    under the circumstances.” Office of Consumers’ Counsel v. Pub. Util. Comm., 
    67 Ohio St.2d 153
    , 166, 
    423 N.E.2d 820
     (1981).
    {¶ 31} The PUCO’s reliance on the guidance from the National Association
    of Regulatory Commissioners and its discussion of the “lumpy nature of utility”
    investment is telling in this regard. The manual was prepared to serve as a guideline
    for state and federal regulatory utility commission personnel. It does not override
    applicable jurisdictional law. The PUCO is bound to follow Ohio law, not the
    Regulatory Commissioners’ manual. See id. at 163.
    {¶ 32} In effect, the PUCO applied what is known as the “prudent-
    investment” test, the most prominent alternative to the used-and-useful test.
    Jonathan Kahn, Keep Hope Alive: Updating the Prudent Investment Standard for
    Allocating Nuclear Plant Cancellation Costs, 22 Fordham Envtl.Law Rev. 43, 49-
    50 (2010). The used-and-useful test is forward-looking: it incorporates into the rate
    base only the property that has been taken by the public for its benefit. Baumol &
    Sidak, The Pig in the Python: Is Lumpy Capacity Investment Used and Useful?, 
    23 Energy L.J. 383
     (2002); James J. Hoecker, “Used and Useful”: Autopsy of a
    Ratemaking Policy, 
    8 Energy L.J. 303
    , 311 (1987), fn. 38. In contrast, the prudent-
    10
    January Term, 2021
    investment test is backward-looking: it incorporates into the rate base any
    investments in property a public utility made, so long as that investment was
    prudent when it was made. Baumol & Sidak, 23 Energy L.J. at 383. That’s the
    case even if the prudent investment never pans out for customers. Richard J. Pierce
    Jr., The Regulatory Treatment of Mistakes in Retrospect: Canceled Plants and
    Excess Capacity, 132 U. Pa.L.Rev. 497, 511-512 (1984). Thus, the prudent-
    investment test places the risk of a failed investment on the customers, who must
    pay so long as that investment was prudently made. Baumol & Sidak, 23 Energy
    L.J. at 392.   In contrast, the used-and-useful test places the risk of a failed
    investment on a public utility because the customers are made to pay only for what
    they take for their benefit. Id. at 391-392.
    {¶ 33} The used-and-useful test doesn’t prohibit utilities from making
    capital investments based on whatever scale and time frame the utility finds the
    most prudent. But what it does do is limit the utility’s ability to recover the costs
    for such investments. Only at the actual point in time in which such investments
    are used and useful in providing services to the ratepayers may the utility charge
    consumers for such capital investments. Of course, this doesn’t mean that some
    extra capacity may never be considered useful. In an appropriate circumstance, a
    limited degree of reserve capacity could be useful (or beneficial) to consumers in
    providing protection against unforeseen contingencies in the same way that
    property insurance is useful to a homeowner. In evaluating such circumstances,
    however, the question always must be whether the property is used and useful, not
    whether it was a prudent investment.
    {¶ 34} Certainly, the General Assembly could have opted for a prudent-
    investment test, instead of the used-and-useful test in R.C. 4909.15(A). Indeed, in
    another section of the Revised Code, R.C. 4909.154, the General Assembly
    provided a test for assessing compensation for a public utility’s operating and
    maintenance expenses that is based on whether the utility’s policies and practices
    11
    SUPREME COURT OF OHIO
    are imprudent. The PUCO lacks authority to “legislate in its own right” and may
    not substitute its own test for the one adopted by the General Assembly. Office of
    Consumers’ Counsel v. Pub. Util. Comm., 67 Ohio St.2d at 166, 
    423 N.E.2d 820
    .
    But that is precisely what the PUCO did when relying on the prudence of
    Suburban’s investment.
    D. We remand for the PUCO to apply the appropriate standard
    {¶ 35} The application of the relevant legal standard to the facts is
    something that is best left to the PUCO in the first instance. In re Complaint of
    Wingo v. Nationwide Energy Partners, L.L.C., 
    163 Ohio St.3d 208
    , 2020-Ohio-
    5583, 
    169 N.E.3d 617
    , ¶ 26. Here, the PUCO departed from the proper standard
    by looking beyond the date certain and in considering whether the investment was
    prudent rather than “useful.” Because the PUCO failed to properly apply the used-
    and-useful standard, we remand this case for it to do so. On remand, the PUCO
    must evaluate the evidence and determine whether the 4.9-mile pipeline extension
    was used and useful as of the date certain.
    {¶ 36} The dissent agrees that the PUCO erred when it considered the
    prudence of Suburban’s investment but contends that this error does not warrant a
    remand. The dissent essentially finds the error harmless, pointing to the portion of
    the PUCO’s rehearing entry in which the PUCO labeled its earlier reliance on
    investor prudence as “additional considerations,” Pub. Util. Comm. Nos. 18-1205-
    GA-AIR, 18-1206-GA-ATA, and 18-1207-GA-AAM, Second rehearing entry, ¶ 22
    (Apr. 22, 2020). According to the dissent, the PUCO ultimately “refuted [the
    Consumers’ Counsel’s] overbuilding claim,” dissenting opinion at ¶ 51, with
    evidence of the pipeline extension’s date-certain usefulness.
    {¶ 37} This characterization of the PUCO’s decision is off base. The
    evidence cited by the dissent as having refuted the Consumers’ Counsel’s
    overbuilding claim simply showed that without any extension at all, pressure levels
    were forecasted to drop below the minimum safety threshold. Here’s the specific
    12
    January Term, 2021
    evidence of date-certain usefulness the dissent relies upon: (1) Suburban would
    have to “prepare for contingencies—such as cold temperatures, high winds,
    sustained weather events, and changes in load,” dissenting opinion at ¶ 56, (2)
    “without the 4.9-mile extension, the pressure * * * would drop to 104.27 psig at the
    end of 2018, barely above the minimum-acceptable level of 100 psig,” id. at ¶ 51,
    and (3) pressure “would drop to 78.72 psig in 2019 without the extension,” id. at
    ¶ 51.
    {¶ 38} The problem is that none of this evidence shows that a 4.9-mile
    extension was necessary. It simply shows that some extension was necessary to
    address safety concerns and that a 4.9-mile extension would easily do the trick. But
    by this logic, virtually any size extension (10 miles, 15 miles, and beyond) would
    pass muster.
    {¶ 39} The dissent rightfully notes the distinction between, on one side, a
    pipeline with adequate reserves and, on the other, a pipeline overbuilt with excess
    capacity. But we are in the dark as to which side the 4.9-mile extension lies on
    because the PUCO provided no analysis beyond its nod to future prudence for why
    the 4.9-mile pipeline extension made sense over a shorter extension.
    {¶ 40} We are also troubled by the dissent’s suggestion that the Consumers’
    Counsel needed to provide its own modeling or forecasts for its overbuilding claim.
    It is Suburban that seeks the benefit of a rate increase. As such, Suburban has “the
    burden of proof to show that the proposals in the application are just and
    reasonable.” R.C. 4909.18; see also R.C. 4909.19(C); Ohio Edison Co., 63 Ohio
    St.3d at 558-559, 
    589 N.E.2d 1292
    . And while we recognize the dissent’s point
    that the PUCO is afforded discretion in how it responds to the evidence before it,
    this discretion is cabined by a statutory mandate to apply the used-and-useful test
    to ensure rates are in fact just and reasonable. R.C. 4909.15. The PUCO went
    astray of this requirement when it relied on “additional considerations” of investor
    prudence in approving the 4.9-mile extension. This was not harmless error.
    13
    SUPREME COURT OF OHIO
    E. We need not consider the Consumers’ Counsel’s remaining challenges
    {¶ 41} As part of the settlement agreement, Suburban agreed to phase in its
    rate increase over three years with customer rates reflecting charges for 50 percent
    of the value of the extension in the first year, 80 percent of the extension in the
    second year, and 100 percent thereafter. The phase-in did not change the overall
    amount that customers would pay in the aggregate—Suburban would still recover
    the full value of its investment, but the recovery would be spread out over three
    years. And if Suburban’s projections of growth are correct, it means that existing
    customers would ultimately pay less because as customers are added, the rates are
    spread out over a larger rate base.      Within its first assignment of error, the
    Consumers’ Counsel challenges the PUCO’s decision to approve this phase-in,
    arguing that it is inconsistent with the requirement that property be valued as of the
    date certain.
    {¶ 42} A party who seeks to challenge an order on appeal must be aggrieved
    by that order. See Ohio Contract Carriers Assn. v. Pub. Util. Comm., 
    140 Ohio St. 160
    , 
    42 N.E.2d 758
     (1942), syllabus. Thus, we will not reverse an order of the
    commission unless the party seeking reversal shows that it has been harmed by the
    order. In re Application of Ohio Power Co., 
    155 Ohio St.3d 320
    , 
    2018-Ohio-4697
    ,
    
    121 N.E.3d 315
    , ¶ 9. Here, the Consumers’ Counsel fails to show that it is
    aggrieved by the PUCO’s decision to allow the phase-in of the rate increase; if
    anything, the phase-in would seem to work a net benefit to consumers.
    {¶ 43} In its reply brief, the Consumers’ Counsel suggests a possible
    scenario where some customers could be hurt by the phase-in. It posits that if
    Suburban’s projections are wrong, and if instead of adding customers Suburban
    actually loses customers, then the remaining customers would end up paying more
    because the rate increase would be spread over a smaller customer base. But this
    argument is purely speculative: there is nothing in the record that provides any basis
    to predict that Suburban will lose customers. And “[w]e will not reverse a
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    January Term, 2021
    commission order based on speculation.” In re Application of Ohio Power Co., 
    155 Ohio St.3d 326
    , 
    2018-Ohio-4698
    , 
    121 N.E.3d 320
    , ¶ 50. Because the Consumers’
    Counsel has failed to show that it is aggrieved by the phase-in, we do not consider
    further its challenge to that portion of the PUCO’s order.
    {¶ 44} Finally, we need not consider the Consumers’ Counsel’s second
    proposition of law, in which it argues that the PUCO’s decision was manifestly
    against the weight of the evidence. Our conclusion that the case should be
    remanded for application of the proper standard renders this argument moot.
    III. Conclusion
    {¶ 45} The PUCO erred when it assessed the usefulness of Suburban’s 4.9-
    mile pipeline extension by looking beyond the date certain and considering the
    prudence of Suburban’s investment. We remand for the PUCO to properly apply
    the used-and-useful standard.
    Order reversed
    and cause remanded.
    O’CONNOR, C.J., and KENNEDY, FISCHER, STEWART, and BRUNNER, JJ.,
    concur.
    DONNELLY, J., dissents, with an opinion.
    _________________
    DONNELLY, J., dissenting.
    {¶ 46} A majority of the court has decided that appellee Public Utilities
    Commission of Ohio’s order allowing a rate increase should be reversed and the
    cause remanded because the commission improperly applied the used-and-useful
    test in R.C. 4909.15(A)(1) in allowing intervening appellee, Suburban Natural Gas,
    to recover its costs for building a 4.9-mile pipeline extension. I agree with the
    majority that the commission erred when it considered whether Suburban’s
    decision to build the 4.9-mile extension rather than a shorter, two-mile extension
    had been prudent. Whether the longer extension would minimize future regulatory
    15
    SUPREME COURT OF OHIO
    and construction costs is not a relevant consideration under the used-and-useful
    standard of R.C. 4909.15(A)(1). But despite the commission’s legal error, the
    evidence supports the commission’s finding that the entire pipeline extension was
    used and useful as of the date certain, which was a separate and sufficient basis for
    determining that Suburban was entitled to full recovery of its costs. Therefore, I
    dissent and would affirm the commission’s order.
    ANALYSIS
    {¶ 47} Under the plain language of R.C. 4909.15(A)(1), a utility may
    recover its investment in property from ratepayers only if the property is “used and
    useful” in providing service to customers “as of the date certain.” As the majority
    notes, the dispositive question here is whether the 4.9-mile extension was useful
    under R.C. 4909.15(A)(1). Appellant, Office of Consumers’ Counsel (“OCC”),
    conceded that two miles of the pipeline extension was useful and thus lawfully
    included in rates. OCC, however, maintains that the remaining 2.9 miles were not
    useful in providing service as of the date certain and that therefore, Suburban’s
    customers should not be charged for this part of the extension.
    {¶ 48} The majority adopts OCC’s first proposition of law, concluding that
    the commission erred when it considered whether Suburban had made a prudent
    investment decision to build the 4.9-mile extension. Specifically, the majority
    holds that the commission violated R.C. 4909.15(A)(1) by relying on the longer
    extension’s potential to save regulatory and construction costs beyond the date
    certain rather than looking at whether the extension was useful in providing service
    to customers as of the date certain. I agree with the majority that the commission
    should not have considered whether Suburban acted prudently when determining
    whether the extension met the used-and-useful test. In my view, however, the
    evidence supports a finding that the entire pipeline was used and useful as of the
    date certain, despite the commission’s error in relying on the prudence of
    Suburban’s decision. Thus, I believe that there was a sufficient basis for the
    16
    January Term, 2021
    decision to allow Suburban to recover its entire investment in the 4.9-mile
    extension.
    Record evidence shows that the entire 4.9-mile extension
    was useful as of the date certain
    {¶ 49} R.C. 4909.15(A)(1) requires the commission, when setting “just and
    reasonable rates,” to determine the value of the utility’s property that is used and
    useful in rendering service as of the date certain.
    Whether property is used and useful in providing service to
    the customers of a utility is a question which of necessity must be
    resolved on the basis of a case-by-case analysis. That status cannot
    be determined through the application of a rigid formula, but should
    be ascertained by the trier of the facts in light of all the
    circumstances.
    Ohio Consumers’ Counsel v. Pub. Util. Comm., 
    58 Ohio St.2d 449
    , 453, 
    391 N.E.2d 311
     (1979).
    {¶ 50} The commission found that the 4.9-mile extension was used and
    useful as of the date certain because without the additional capacity provided by the
    extension, Suburban’s pipeline was at risk of falling below minimally adequate
    pressure levels during the 2018-2019 winter. According to the majority, that
    “evidence showed only that the existing pipeline would soon be inadequate and that
    some extension was necessary; it didn’t address the Consumers’ Counsel’s
    contention that Suburban built far more than necessary.” Majority opinion at ¶ 27.
    {¶ 51} The majority is mistaken. The commission did cite evidence that
    refuted OCC’s overbuilding claim. Suburban’s engineers forecast that by the 2018-
    2019 winter season Suburban would require additional capacity to ensure adequate
    pressure for the company’s distribution system in southern Delaware County. The
    17
    SUPREME COURT OF OHIO
    commission specifically cited an August 31, 2018 model created by Suburban’s
    engineering firm that projected how much capacity and pipeline pressure was
    needed to serve customers safely and reliably during the winter of 2018-2019. Pub.
    Util. Comm. Nos. 18-1205-GA-AIR, 18-1206-GA-ATA, and 18-1207-GA-AAM,
    ¶ 126 (Sept. 26, 2019). This model projected that without the 4.9-mile extension,
    the pressure at the Lazelle Road point of delivery would drop to 104.27 psig at the
    end of 2018, barely above the minimum-acceptable level of 100 psig. The model
    also forecast that pressure would drop to 78.72 psig in 2019 without the extension,
    well below the minimum safe harbor. But the model projected that with the 4.9-
    mile extension, the pressure would be 232.50 psig.
    {¶ 52} Moreover, OCC conceded before the commission that the August
    2018 model was the only one relevant to whether the 4.9-mile extension was used
    and useful as of the date certain. Although OCC argued that the projections showed
    the extension was not useful under R.C. 4909.15, it offered no evidence, such as its
    own modeling or forecasts, to refute Suburban’s methodology. Instead, OCC
    offered testimony from only one witness, who was neither an engineer nor an expert
    in pipeline construction, demand forecasting, or capacity requirements.
    {¶ 53} We have held that the commission should be afforded wide
    discretion in determining issues of capacity. Consumers’ Counsel v. Pub. Util.
    Comm., 
    63 Ohio St.3d 522
    , 530, 
    589 N.E.2d 1267
     (1992). “Limited judicial review
    of an excess capacity determination is sound for the reason that while excess
    capacity analyses have an aura of precision about them, they are fraught with
    judgments and assumptions.” Consumers’ Counsel v. Pub. Util. Comm., 
    67 Ohio St.2d 153
    , 158, 
    423 N.E.2d 820
     (1981). See also Cleveland v. Pub. Util. Comm.,
    
    63 Ohio St.2d 62
    , 65, 
    406 N.E.2d 1370
     (1980) (“Since utilities must anticipate load
    growth years in advance to maintain adequate capacity to ensure reliable service, it
    is unrealistic to expect a utility to have only the precise amount of capacity needed
    at any given time”).
    18
    January Term, 2021
    {¶ 54} In the end, the commission’s determination that a shorter extension
    would not have maintained pressure at Lazelle Road above the minimum-
    acceptable level of 100 psig was supported by the record and well within the
    discretion this court has afforded the commission in the above cases.
    The commission’s finding that all 4.9 miles of the extension were
    necessary is consistent with the majority’s definition of “useful”
    under R.C. 4909.15(A)(1)
    {¶ 55} The majority determines that “useful” under R.C. 4909.15(A)(1)
    means “ ‘advantageous’ or ‘beneficial.’ ” Majority opinion at ¶ 25. I agree with
    the majority that “extra capacity” or “[i]n an appropriate circumstance, a limited
    degree of reserve capacity could be useful (or beneficial) to consumers in providing
    protection against unforeseen contingencies in the same way that property
    insurance is useful to a homeowner.” Id. at ¶ 33. And that is precisely what the
    commission found here.
    {¶ 56} The commission noted that Suburban is a natural-gas utility engaged
    in providing a critical and necessary commodity. That being so, the commission
    found that Suburban must prepare for contingencies—such as cold temperatures,
    high winds, sustained weather events, and changes in load. The commission relied
    on engineering models that projected that Suburban needed additional capacity to
    transport more gas to alleviate pressure concerns at the Lazelle Road point of
    delivery. The commission found that without the 4.9-mile extension, “Suburban’s
    ability to provide safe, adequate, and reliable service may have been impacted
    during a particularly cold stretch over multiple days and involving multiple
    contingencies.” Pub. Util. Comm. Nos. 18-1205-GA-AIR, 18-1206-GA-ATA, and
    18-1207-GA-AAM, Second rehearing entry, ¶ 126 (Apr. 22, 2020).                  The
    commission further explained that the 4.9-mile extension was necessary to provide
    Suburban with needed capacity at Lazelle Road to serve customers during normal
    19
    SUPREME COURT OF OHIO
    weather conditions and to maintain pressure levels when demand unexpectedly
    surges during the winter heating season.
    {¶ 57} In applying the meaning of the word “useful” to the facts of this case,
    it is critical to understand that although pipelines are constructed to meet peak
    demand, they rarely use 100 percent of their capacity every day of the year. This
    means that on any given day there will likely be underutilized capacity in the
    pipeline. But that fact that a pipeline at times has underutilized capacity does not
    mean that the pipeline is not useful for purposes of R.C. 4909.15(A)(1). Rather,
    the additional capacity built into the pipeline enhances the reliability of the natural-
    gas distribution system and provides insurance for customers against service
    interruptions, a point that the majority concedes.
    {¶ 58} These considerations do not mean that pipelines can never be
    overbuilt, only that the evidence in this case does not support such a finding. In the
    end, the commission’s findings validate its conclusion that the entire length of the
    4.9-mile extension was beneficial and thus “useful” under R.C. 4909.15(A)(1).
    Accordingly, the majority errs in holding otherwise.
    The majority’s reliance on Suburban’s expert does not justify reversal
    {¶ 59} The majority relies on the commission’s finding that “a two-mile
    extension may have been adequate to serve customers as of the date certain but
    * * * that soon thereafter Suburban would have had to seek regulatory approval for
    another extension.” (Emphasis added.) Majority opinion at ¶ 28. Suburban’s
    expert witness did testify to this. The commission found, however, that other
    evidence outweighed this testimony.        Specifically, the commission found on
    rehearing that based on a totality of the evidence presented—including the
    projections modeled by Suburban’s engineers—the 4.9-mile extension was
    necessary as of the date certain to provide safe and reliable service to Suburban’s
    customers. Thus, the commission found that the weight of the evidence supported
    a finding that the entire extension should be included in Suburban’s rate base, and
    20
    January Term, 2021
    it is not this court’s function to reweigh this evidence on appeal. Elyria Foundry
    Co. v. Pub. Util. Comm., 
    114 Ohio St.3d 305
    , 
    2007-Ohio-4164
    , 
    871 N.E.2d 1176
    ,
    ¶ 39.
    {¶ 60} The commission’s finding that it would have been imprudent to
    build a two-mile extension because Suburban would have needed to add another
    extension soon after, costing ratepayers more money in the long run, was error. But
    the commission treated its reliance on the prudence of Suburban’s investment
    decision as “additional considerations,” Pub. Util. Comm. Nos. 18-1205-GA-AIR,
    18-1206-GA-ATA, and 18-1207-GA-AAM, Second rehearing entry, ¶ 22 (Apr. 22,
    2020), separate and apart from its reliance on Suburban’s modeling projections.
    Therefore, even though I find merit in OCC’s first proposition of law, the record
    supports the commission’s finding that the entire 4.9-mile extension was useful as
    of the date certain, effectively rendering any error harmless.
    CONCLUSION
    {¶ 61} The commission based its factual findings primarily on Suburban’s
    modeling, and it properly applied the used-and-useful standard to this evidence. On
    rehearing, the commission clarified that it had cited the factors that made
    Suburban’s management decision prudent only as “additional considerations.” As
    a result, despite the commission’s error in relying on the prudent-investment rule,
    this court errs in concluding that OCC has demonstrated reversible error.
    Therefore, I dissent. I would affirm the commission’s order.
    _________________
    Bruce Weston, Consumers’ Counsel, and Christopher Healey and Angela
    D. O’Brien, Assistant Consumers’ Counsel, for appellant.
    Dave Yost, Attorney General, John Jones, Section Chief, and Robert A.
    Eubanks and Werner L. Margard III, Assistant Attorneys General, for appellees.
    Carpenter, Lipps & Leland, L.L.P., Kimberly W. Bojko, and Michael H.
    Carpenter, for intervening appellees.
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    SUPREME COURT OF OHIO
    _________________
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