Mesquite v. Ador ( 2022 )


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  •                                IN THE
    ARIZONA COURT OF APPEALS
    DIVISION ONE
    MESQUITE POWER, LLC, Plaintiff/Appellee,
    v.
    ARIZONA DEPARTMENT OF REVENUE, Defendant/Appellant.
    No. 1 CA-TX 22-0002
    FILED 12-20-2022
    Appeal from the Arizona Tax Court
    No. TX2018-000928
    The Honorable Danielle J. Viola, Judge
    VACATED AND REMANDED WITH INSTRUCTIONS
    COUNSEL
    Mooney, Wright, Moore & Wilhoit, PLLC, Mesa
    By Paul J. Mooney (argued) and Bart S. Wilhoit
    Counsel for Appellee
    Arizona Attorney General’s Office, Phoenix
    By Lisa Neuville (argued) and Kimberly Cygan
    Counsel for Appellant
    OPINION
    Judge Paul J. McMurdie delivered the Court’s opinion, in which Presiding
    Judge Brian Y. Furuya and Judge Jennifer B. Campbell joined.
    MESQUITE v. ADOR
    Opinion of the Court
    M c M U R D I E, Judge:
    ¶1            The Arizona Department of Revenue (“Department”) appeals
    from the tax court’s judgment reducing the full cash value of property held
    by Mesquite Power, LLC (“Mesquite”) for the 2019 tax year. The
    Department argues the tax court erred by (1) discounting the impact of an
    established power purchase agreement on the property’s value and
    (2) considering incompetent expert testimony.
    ¶2           We hold that where intangible assets enhance the real and
    tangible property’s value, a competent appraisal must consider the effect
    such intangible assets have on the taxable property’s value. Thus, we vacate
    the judgment, vacate the award of attorney’s fees, costs, and expenses, and
    remand for the court to affirm the statutory value found by the Department.
    FACTS AND PROCEDURAL BACKGROUND
    ¶3           The heart of this dispute is Mesquite’s power plant’s full cash
    value assessment for the 2019 tax year. At issue is whether the existence of
    an intangible agreement enhances the value of the real and tangible
    personal property subject to the tax assessment.
    1.     Mesquite’s Power Plant.
    ¶4           Mesquite’s power plant is one-half of a two-block,
    combined-cycle, natural gas-fired electric generation facility in western
    Maricopa County. It operates as a “base load plant,” meaning it runs
    continuously. The plant sells the electricity it generates on the open market
    as a “merchant plant.”
    ¶5             A power plant’s capacity is measured in megawatts. The plant
    has a nameplate capacity of 691.6 megawatts and a net operating capacity
    of 625 megawatts. Another metric, called “heat rate,” confirms how
    efficiently a plant converts fuel into energy. The plant’s historical heat rates
    are superior to the average for comparable facilities in the region and across
    the United States.
    2.     Transaction History.
    ¶6            Sempra U.S. Gas & Power (“Sempra”) built the plant in 2003.
    Sempra structured the plant and its accompanying business as Mesquite. In
    2015, Sempra sold Mesquite to ArcLight Capital Partners, LLC (“ArcLight”)
    for nearly $357 million.
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    MESQUITE v. ADOR
    Opinion of the Court
    ¶7            ArcLight spent over $27 million in capital improvements for
    the plant. In December 2017, less than a month before the January 1
    valuation date1 for the 2019 tax year, ArcLight solicited offers for the sale of
    Mesquite. Southwest Generation Operating Company (“Southwest”) first
    offered $518 million, and the deal closed in July 2018 for around $556
    million. Southwest currently owns Mesquite.
    3.     The Purchase Agreement.
    ¶8            Southwest’s purchase of Mesquite from ArcLight included
    transferring a contract for power generation (“Purchase Agreement”).
    Under the Purchase Agreement, Mesquite guaranteed the Southwest Public
    Power Resources Group (“SPPR”) access to 271 megawatts of electrical
    capacity until May 2021, when the capacity increased to 475 megawatts. In
    return, SPPR promised to pay Mesquite $34 million per year, rising to $48
    million per year in 2022, as well as certain operation and maintenance costs
    for the plant. SPPR’s payments are fixed whether SPPR draws upon any
    guaranteed electrical capacity. The terms of the Purchase Agreement run
    through 2046. Both before and after the purchase by Southwest, Mesquite
    remains bound by the Purchase Agreement.
    ¶9            The Purchase Agreement does not require that Mesquite
    provide electricity to SPPR from the Mesquite plant. If it chooses, Mesquite
    may purchase power on the open market to cover the capacity guarantee to
    SPPR. Although technically the Purchase Agreement and the plant are
    severable, any such severance would require approval by SPPR. According
    to Southwest’s vice president, the presence of the Purchase Agreement was
    a deciding factor in purchasing the property.
    4.     Litigation History.
    ¶10           This is not the first time Mesquite has appeared before the tax
    court. While still under the ownership of ArcLight, Mesquite challenged the
    Department’s valuation of the property for the 2016 and 2017 tax years. The
    tax court issued a consolidated judgment in Mesquite’s favor, establishing
    reduced property values for those years and finding that the Purchase
    Agreement was a “non-taxable, intangible asset.” The Department did not
    appeal that judgment.
    1     A.R.S. § 42-14153(C) provides that a property’s value is the value
    “determined as of” the valuation date. Siete Solar, LLC v. Ariz. Dep’t of
    Revenue, 
    246 Ariz. 146
    , 150, ¶ 17 (App. 2019).
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    MESQUITE v. ADOR
    Opinion of the Court
    ¶11          In this case, the Department valued the property for the 2019
    tax year at $196 million (“statutory value”). Mesquite appealed that
    assessment to the tax court, claiming that the statutory value exceeded the
    property’s market value in violation of A.R.S. § 42-11001(6). Mesquite
    argued that the property’s full cash value should be reduced to $105
    million.
    ¶12            Before the tax court, Mesquite moved for partial summary
    judgment on whether the Purchase Agreement could be considered in the
    property’s valuation. Mesquite asserted that the 2016–17 rulings estopped
    the Department from considering the Purchase Agreement. The
    Department, in turn, argued that while the Purchase Agreement was not
    taxable, its existence enhanced the value of the taxable property and should
    be considered in determining value. The tax court entered partial summary
    judgment for Mesquite, ruling that the Purchase Agreement is a
    “non-taxable, intangible asset that is separate and severable from the
    tangible property.” The court partially denied the motion about “whether
    cash flows attributable to the Purchase Agreement can be considered as part
    of the valuation of Mesquite’s property.” The court did not address the cash
    flow issue in its final judgment.
    ¶13           At trial, Mesquite offered expert testimony supporting its
    $105 million evaluation claim. The Department offered expert testimony
    valuing the property at $432 million. Each expert considered the three
    standard appraisal methods (market,2 income, and cost), although
    Mesquite’s expert gave no weight to the cost or market approaches. Only
    the Department’s evaluation included the “cash flows attributable” to the
    Purchase Agreement. Mesquite’s expert, instead, constructed a
    hypothetical income model that excluded the Purchase Agreement income.
    ¶14          After a five-day bench trial, the tax court ruled for Mesquite,
    valuing the property at $105 million for the 2019 tax year. The Department
    appealed, and we have jurisdiction under A.R.S. §§ 12-2101(A)(1)
    and 42-1254(D)(4).
    2      In the tax court, the parties called the market approach the “sales
    comparison” approach, we apply the terminology found in A.R.S.
    § 42-16051(B)(1)–(3). See Maricopa County v. Sperry Rand Corp., 
    112 Ariz. 579
    ,
    581 (1976).
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    MESQUITE v. ADOR
    Opinion of the Court
    DISCUSSION
    ¶15            “We view the facts in the light most favorable to sustaining
    the trial court’s judgment.” Cimarron Foothills Cmty. Ass’n v. Kippen, 
    206 Ariz. 455
    , 457, ¶ 2 (App. 2003) (quoting Sw. Soil Remediation, Inc. v. City of
    Tucson, 
    201 Ariz. 438
    , 440, ¶ 2 (App. 2001)). We will “defer to the trial court’s
    factual findings as long as the record supports them.” In re the Gen.
    Adjudication of All Rts. to Use Water in the Gila River Sys. & Source, 
    198 Ariz. 330
    , 337, ¶ 15 (2000). We review pure questions of law and mixed questions
    of law and fact de novo. See Robson Ranch Mountains, LLC v. Pinal County, 
    203 Ariz. 120
    , 125, ¶ 13 (App. 2002).
    ¶16           When challenging the statutory value, the taxpayer must
    rebut the statutory presumption and show that a lower valuation is correct.
    See Graham County v. Graham County Elec. Coop., Inc., 
    109 Ariz. 468
    , 469–70
    (1973).
    ¶17           Arizona values property at its “full cash value” for tax
    purposes. Bus. Realty of Ariz., Inc. v. Maricopa County, 
    181 Ariz. 551
    , 553
    (1995). “Full cash value” generally means “fair market value,” defined as
    “that amount at which property would change hands between a willing
    buyer and a willing seller, neither being under any compulsion to buy or
    sell and both having reasonable knowledge of the relevant facts.” 
    Id.
     Fair
    market value can be derived by using “standard appraisal methods and
    techniques.” A.R.S. § 42-11001(6).
    ¶18           “Current usage shall be included in the formula for reaching
    a determination of full cash value.” A.R.S. § 42-11054(C)(1). “The valuation
    of electric generation facilities,” like the property here, is determined by
    looking at, among other things, “[t]he value of land, . . . . [t]he valuation of
    real property improvements used in operating the facility, . . . . [and the]
    valuation of personal property used in operating the facility.” A.R.S.
    § 42-14156(A)(1)–(3). “‘Personal property’ means all tangible property
    except for land and real property improvements.” A.R.S. § 42-14156(B)(2).
    A.     Mesquite Misattributes Value to the Purchase Agreement.
    ¶19          The      parties     agree      that    Southwest        bought
    Mesquite—including real and personal property and the Purchase
    Agreement—for about $556 million. Mesquite’s expert appraised the
    tangible property at $105 million. Though there was no appraisal for
    Mesquite’s intangible property, it follows from the sale price that, as of the
    time of Southwest’s purchase, Southwest valued Mesquite’s intangible
    5
    MESQUITE v. ADOR
    Opinion of the Court
    property (which includes the Purchase Agreement) at more than $400
    million.
    ¶20           Although Mesquite did not separately appraise the value of
    the Purchase Agreement, the Department argues that the Purchase
    Agreement has little to no independent value. The Department also
    contends, however, that the Purchase Agreement’s presence enhances the
    value of the real and tangible property of the plant.
    ¶21            The Purchase Agreement is a contract to provide electricity to
    SPPR in exchange for SPPR paying Mesquite a fixed annual rate and
    operational costs. But the Purchase Agreement itself does not represent or
    evidence the value of these transactions. If the Purchase Agreement no
    longer existed, it would change nothing about the plant or its ability to
    produce the same electrical capacity. So long as the plant can produce
    electricity, a new sale agreement could be negotiated with SPPR or any
    other willing purchaser. The plant’s electricity production generates value
    no matter how the sale of that electricity is made or who is purchasing the
    electricity.
    ¶22            Still, Mesquite argues that the Purchase Agreement has
    independent value because, under the agreement, Mesquite will be paid no
    matter if SPPR chooses to take any electrical power. This argument is not
    persuasive. SPPR’s choice to obtain power under the Purchase Agreement
    is irrelevant because Mesquite’s obligation to guarantee power under that
    agreement persists. Any income Mesquite receives under the Purchase
    Agreement is earned by ensuring SPPR has access to the specified capacity.
    That Mesquite may or may not need to use the plant to satisfy its obligations
    under the Purchase Agreement does not alter the reality that electricity can
    be produced and sold by the plant, much less the circumstances of actual
    use relevant during the valuation period. And if the income must yet be
    achieved through performance under the contract, the value of the income
    is not inherent to the contract.
    ¶23            This is not to say that a contract can never hold value. For
    instance, a contract may have inherent value if its terms are favorable such
    that the bargained-for return is worth more than the consideration would
    secure on the open market. But the tax court did not make such a finding.
    If anything, the Purchase Agreement provides the best evidence for the fair
    market value of Mesquite’s obligation, as the agreement was entered at
    arm’s length.
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    MESQUITE v. ADOR
    Opinion of the Court
    ¶24           Finally, even if the Purchase Agreement holds some value,
    Mesquite has failed to show that the inherent value of the Purchase
    Agreement explains the $400 million gap between the purchase price and
    the claimed property value. We thus conclude that Mesquite misattributes
    the value of the taxable property to the Purchase Agreement.
    B.    The Purchase Agreement Enhances the Value of the Taxable
    Property.
    ¶25            Mesquite maintains that because the Purchase Agreement is
    a “non-taxable, intangible asset that is separate and severable from the
    tangible property,” it cannot be considered in determining the property’s
    tax valuation. In its appraisal, Mesquite’s expert excluded the income
    generated under the Purchase Agreement and declined to factor the
    Purchase Agreement into Mesquite’s risk assessment. As a result,
    Mesquite’s appraisal for $105 million hinged on hypothetical cash flows
    and risk as if the Purchase Agreement did not exist.
    ¶26           Among other criticisms, the Department argues that
    Mesquite’s appraisal is flawed because the Purchase Agreement
    contributes to the cash flow of the taxable tangible property. It also claims
    that the Purchase Agreement’s income guarantee reduces the risk of
    operating the plant. The Department asserts that the Purchase Agreement’s
    inherent value may be non-taxable, but to appraise the property as if the
    Purchase Agreement did not exist would artificially reduce the value of the
    taxable property and be error.
    ¶27            As a matter of mixed fact and law, we review de novo whether
    an appraisal technique is proper under standard appraisal methods. See
    Eurofresh, Inc. v. Graham County, 
    218 Ariz. 382
    , 387, ¶ 23 (App. 2007). As
    applied here, we address whether a tax valuation of real and personal
    property should consider intangible assets.
    ¶28            Maricopa County v. Viola, a case involving apartments
    participating in the low-income housing tax credits (“LIHTC”) program, is
    instructive. 
    251 Ariz. 276
     (App. 2021). Under the LIHTC program, property
    owners received federal tax credits for agreeing to thirty-year restrictions
    on the rent they can charge tenants. 
    Id. at 278, ¶ 2
    . The tax court found this
    agreement intangible and untaxable. Cottonwood Affordable Hous. v. Yavapai
    County, 
    205 Ariz. 427
    , 429 (Ariz. Tax Ct. 2003).
    ¶29           We affirmed the tax court’s ruling through special action and
    held that the LIHTC program must be considered when valuing property
    subject to the restrictions. Viola, 251 Ariz. at 281, ¶ 19. We explained that
    7
    MESQUITE v. ADOR
    Opinion of the Court
    “[a]n LIHTC property cannot be valued as if it were a conventional
    apartment complex because it is not and cannot be used as such.” Id. at 280,
    ¶ 15. This holding reflects the statutory requirement that “[c]urrent usage”
    be considered in reaching the formula for full cash value. A.R.S.
    § 42-11054(C)(1). We agreed with the tax court’s conclusion:
    A willing buyer, knowing that there is a restriction as to the
    amount of rent that can be charged, would pay less for a low
    income housing project than for a regular commercial
    apartment complex. This property should not be valued as
    though a buyer would not consider the restrictions. A
    valuation for an LIHTC project, determined under any of the
    standard appraisal methods, that does not take the deed
    restrictions into account will not result in a determination of
    fair market value for that property.
    Id. at 279–80, ¶ 13 (quoting Cottonwood Affordable Hous., 
    205 Ariz. at 430
    ).
    Thus, while the LIHTC restrictions were not taxable property, it would be
    error to evaluate the apartments without considering their effect on the
    property.
    ¶30           Parallel reasoning applies here to the Purchase Agreement
    and the Mesquite plant. True, the Purchase Agreement raises rather than
    lowers the value of the business. That said, a willing buyer would still
    consider the Purchase Agreement’s impact on the plant. Southwest’s vice
    president affirmed this by testifying that Southwest would have never
    bought Mesquite’s business without the Purchase Agreement. Because the
    Purchase Agreement influences the purchase price a willing buyer would
    pay for the property (and, more basically, whether to buy the property), the
    proper valuation of the property should reflect the effect of the Purchase
    Agreement. See Viola, 251 Ariz. at 279–80, ¶ 13.
    ¶31           Mesquite argues that it would be improper to consider the
    Purchase Agreement’s enhancement of the value of the taxable property
    because the Purchase Agreement is “separate and severable from the
    tangible property.” Mesquite maintains that because the tax court granted
    partial summary judgment on the issue and it was not appealed, the
    Department cannot contest the Purchase Agreement’s separate and
    severable status.
    ¶32          But the Purchase Agreement’s severability does not resolve
    whether it enhances the value of real and tangible property. The Purchase
    Agreement is severable, but it has not been severed. An asset that may be
    8
    MESQUITE v. ADOR
    Opinion of the Court
    removed from the property does not exempt it from taxation. A contrary
    view would defeat the purpose of including “personal property” in the
    valuation statute. See A.R.S. § 42-14156(A)(3). And more importantly, A.R.S.
    § 42-11054(C)(1) directs that tax evaluations be based on the property’s
    “[c]urrent usage,” not hypothetical usage.
    ¶33            Severable as it may be, the Purchase Agreement is not easily
    disentangled from the plant. The two were transferred together in the sale
    from ArcLight to Southwest. The terms of the Purchase Agreement require
    a supermajority buyer’s approval to sell or transfer the Purchase
    Agreement independently, and Mesquite presented no examples of
    contracts like the Purchase Agreement being sold on the market separately
    from power plants. The Purchase Agreement provides operation and
    maintenance payments for Mesquite. We reject any suggestion that an
    agreement that offers, among other things, payment of operation and
    maintenance costs is not directed toward the operation or maintenance of
    the facility and can be ignored in an income-approach valuation.
    ¶34           Finally, the Purchase Agreement is not a unique or exclusive
    method for selling electrical power. Both parties presented evidence that
    most power plants not owned by a utility company operate and receive
    income through long-term contracts. Yet Mesquite’s expert eliminated the
    revenue generated under the Purchase Agreement in his appraisal because
    the contract produced it. Taken to its extreme, such an approach would
    conclude that fully-subscribed power plants hold no value. Such a view
    defies reason and economic reality. Mesquite may not avoid taxes by
    sequestering its value into an untaxable contract just because such a
    contract is hypothetically severable and independent of the property on
    which it depends for its relevance. To hold otherwise also would run
    contrary to A.R.S. § 42-14156.
    ¶35          We conclude that the Purchase Agreement enhances the value
    of Mesquite’s taxable property because it contributes to the plant’s cash
    flows and current usage. Thus, it must be considered in determining the
    property’s value.
    C.     Because Mesquite’s Appraisal Failed to Evaluate the Property as It
    Exists, It Is Incompetent to Rebut the Statutory Presumption.
    ¶36           Generally, the tax valuation “as approved by the appropriate
    state or county authority is presumed to be correct and lawful.” A.R.S.
    § 42-16212(B). The taxpayer may overcome this presumption by presenting
    competent evidence that the taxing authority’s valuation is excessive.
    9
    MESQUITE v. ADOR
    Opinion of the Court
    Inspiration Consol. Copper Co. v. Ariz. Dep’t of Revenue, 
    147 Ariz. 216
    , 219
    (App. 1985). “Evidence is competent for the purposes of rebutting the
    statutory presumption and of showing that the Department’s valuation was
    excessive when it is derived by standard appraisal methods and techniques
    which are shown to be appropriate under the particular circumstances
    involved.” 
    Id. at 223
    .
    ¶37           If the taxpayer uses a different valuation method than the
    taxing authority, it must establish that its approach was appropriate under
    the circumstances. Inspiration Consol. Copper Co., 147 Ariz. at 219. Yet if the
    taxpayer and taxing authority use the same appraisal method “but differ as
    to the correct treatment of factors utilized in such method, the taxpayer’s
    evidence is nevertheless competent and sufficient to overcome the statutory
    presumption.” Id.
    ¶38            The experts for the Department and Mesquite considered the
    three standard appraisal approaches, though they “differ[ed] as to the
    correct treatment of factors” and the relative weights given each method.
    See Inspiration Consol. Copper Co., 147 Ariz. at 219. The Department’s expert
    gave some weight to each of the three approaches. By contrast, Mesquite’s
    appraisal relied on the income-based approach, claiming it is the most
    relied on by buyers and sellers in the industry. This approach uses the
    projected future cash flows of the property to determine its present value.
    ¶39           But Mesquite did not calculate cash flows for the plant in its
    current usage. Instead, Mesquite only included income from what it
    considers the taxable property, constructing a hypothetical income model
    for the property as if the Purchase Agreement did not exist. Mesquite’s
    model is improper because it envisions the plant operating in a way that is
    not its “[c]urrent usage.” See A.R.S. § 42-11054(C)(1). Mesquite cannot,
    consistent with reality, be valued as a plant without an in-place agreement
    providing a fixed income. See Viola, 251 Ariz. at 280, ¶ 15. This error alone
    would render Mesquite’s appraisal “[in]appropriate under the particular
    circumstances involved.” Inspiration Consol. Copper Co., 147 Ariz. at 223.
    ¶40          But we have more concerns with Mesquite’s appraisal. For
    example, in calculating the weighted average cost of capital (“WACC”) for
    its model, Mesquite’s expert included a “small company size premium”
    and a “company-specific” risk factor. Mesquite added these two values
    10
    MESQUITE v. ADOR
    Opinion of the Court
    together under the label “additional risk factor” (“Ru”).3 The Department
    did not use either of these risk factors. The Department challenges the
    application of Ru, arguing that it is unjustified and that its two components
    are duplicative.
    ¶41           We agree with the Department. The record offers no
    indication that the small company premium and the company-specific risk
    are not improperly duplicative. Mesquite’s expert explained the small
    company premium at trial, testifying that small companies are “inherently
    more risky because of . . . size, lack of diversification, and the liquidity in
    general.” But Mesquite’s expert report justifies the company-specific risk in
    a single sentence, claiming that it “account[s] for the electrical generation
    industry, lack of diversification and illiquidity.” When asked on direct
    examination whether applying the company-specific risk beyond the small
    company premium would be double counting, Mesquite’s expert replied:
    It’s not double counting because, again, we’ve got the risk
    associated with there being a company and diversification,
    right? We still have the unsystematic risk that’s associated
    with—again, the fact that we don’t have that diversification.
    We have a single asset, and more specifically, just the real and
    personal property of that asset.
    ¶42           Despite the expert’s nominal denial, the testimony fails to
    disprove the Department’s accusation of double counting. The whole of
    Mesquite’s evidence encompasses both the small company premium and
    the company-specific risk based on diversification and liquidity grounds.
    The use of two factors to account for the same risk is duplicative. Without
    contrary justification, the Ru factor appears to be little more than an attempt
    to pad the numbers such that they arrive at Mesquite’s preferred value. See
    Del. Open MRI Radiology Assocs., P.A. v. Kessler, 
    898 A.2d 290
    , 339 (Del. Ch.
    2006) (“[T]he company specific risk premium often seems like the device
    experts employ to bring their final results into line with their clients’
    objectives, when other valuation inputs fail to do the trick.”).
    ¶43           Moreover, the effect of Ru on the overall valuation is immense.
    For instance, Ru adds 10.37% to the rate of return on equity capital, more
    3      Mesquite applies the label “additional risk factor” to both the sum,
    Ru, and to the 5% company-specific risk factor which is a subcomponent of
    Ru. For clarity, we call the subcomponent the “company-specific risk” and
    the total 10.37% amount Ru.
    11
    MESQUITE v. ADOR
    Opinion of the Court
    than doubling the number it would otherwise be (and, incidentally, roughly
    doubling the number Southwest projected as a rate of return on equity
    when purchasing Mesquite). Removing Ru and relying only on Mesquite’s
    expert’s numbers for every other step in the analysis would lead to a total
    valuation of over $230 million—a number greater than the statutory value.
    The wild disparity in these values is especially alarming given Mesquite’s
    sparse justifications for incorporating both risk factors.
    ¶44          The Department also argues that the small company premium
    and company-specific risk factors cannot be competently applied without
    evidence to justify their use. The Department supports this position by
    citing an unpublished decision, Transwestern Pipeline Company v. Arizona
    Department of Revenue, No. 1 CA-TX 19-0006, 
    2020 WL 4529622
     (Aug. 6,
    2020) (mem. decision). In Transwestern, the Department appealed a tax
    court’s judgment that adopted a taxpayer’s WACC calculation for the 2016
    and 2017 tax years. Id. at *2, ¶ 6. The taxpayer’s expert appraisal included
    small company premiums and company-specific risk factors that, in total,
    did not exceed five percent. Id. at *3, ¶ 14.
    ¶45           The Department challenged the validity of the risk factors,
    arguing that “company-specific risks duplicate the risks already accounted
    for in the small-company risk premium and the industry beta.”
    Transwestern Pipeline Co., No. 1 CA-TX 19-0006, at *3, ¶ 15. The Department
    also argued that the risk factors were unjustified because
    there is no evidence in the record that Transwestern uniquely
    suffered from the identified company-specific risks . . . while
    other companies in the pipeline industry do not. . . .
    [Transwestern] failed to provide sufficient factual basis for
    the premium; either specific financial analysis to determine
    whether a company-specific risk premium is appropriate or
    the amount of such a premium.
    Id. While the taxpayer argued that applying company-specific risks
    followed “standard appraisal method[s],” the Department countered that
    “the evidence must still show risks specific to the company, above general
    risks to the entire industry.” Id. at *4, ¶ 16.
    ¶46            We agreed with the Department that there was insufficient
    evidence identifying risks specific to Transwestern above the general risk
    to the industry or risks common to all business ventures. Transwestern
    Pipeline Co., No. 1 CA-TX 19-0006, at *5, ¶ 19. We vacated the part of the
    judgment adopting the taxpayer’s WACC calculation, holding that “we
    12
    MESQUITE v. ADOR
    Opinion of the Court
    need not defer to the tax court’s conclusion based on [Transwestern’s]
    testimony when we cannot find competent record evidence that
    Transwestern specifically suffered from the specific risk factors accepted by
    the court.” Id. at *4, ¶ 16; see also Pima County v. Cyprus-Pima Mining Co., 
    119 Ariz. 111
    , 119 (1978) (The expert’s capitalization method was not competent
    evidence when he departed from projected copper prices and failed to
    adjust for inflation.).
    ¶47            Transwestern follows holdings from other jurisdictions. See
    Gesoff v. IIC Indus., Inc., 
    902 A.2d 1130
    , 1158 (Del. Ch. 2006)
    (Company-specific premiums should not be applied without justifying
    evidence.); see also Minn. Energy Res. Corp. v. Comm’r of Revenue, 
    886 N.W.2d 786
    , 793–94 (Minn. 2016) (Lack of evidentiary support for company-specific
    risk justifies a tax court’s decision to exclude this factor.); cf. Horn v.
    McQueen, 
    353 F. Supp. 2d 785
    , 839 (W.D. Ky. 2004) (Appraisals must be
    “careful not to ‘double-count’” by applying a company-specific risk,
    “especially as modified . . . for smaller companies.”). While a
    company-specific risk may apply in some cases, the choice to use and the
    value of such a factor must be supported by the evidence.
    ¶48           Here, the Ru factor is more than double what it was in
    Transwestern. But there is no evidence in the record suggesting that
    Mesquite is inferior to similar plants. On the contrary, its heat rates are
    superior to nationwide and regional averages. There is also no evidence
    that Mesquite is riskier than similar plants. Over half of Mesquite’s capacity
    is contracted through 2046, and Mesquite’s expert testified that plants
    under a contract are less risky than those without an agreement. We
    conclude that Mesquite has failed to provide evidence to justify its use of
    the 10.37% Ru factor. As a result, its inclusion was unreasonable and
    “[in]appropriate under the particular circumstances involved.” Inspiration
    Consol. Copper Co., 147 Ariz. at 223.
    ¶49           Lastly, we respond to the Department’s suggestion that
    Mesquite must apply the unit principle. An appraisal using the unit
    valuation method would calculate the plant’s total value as an operating
    unit and remove any untaxable assets’ fair market value from the full value.
    The Department cites several cases from other jurisdictions that apply the
    unit principle. See Elk Hills Power, LLC v. Bd. of Equalization, 
    304 P.3d 1052
    (Cal. 2013) (power plant); RT Commc’ns, Inc. v. State Bd. of Equalization, 
    11 P.3d 915
     (Wyo. 2000) (telephone company); In re Appeal of ANR Pipeline Co.,
    
    79 P.3d 751
     (Kan. 2003) (natural gas pipeline).
    13
    MESQUITE v. ADOR
    Opinion of the Court
    ¶50          The advantage of the unit principle is that it captures the
    value generated by the cooperation of mutually beneficial assets. In so
    doing, it considers the “[c]urrent usage” of the property. See A.R.S.
    § 42-11054(C)(1). Given the shortcomings in Mesquite’s appraisal, we need
    not decide whether the unit valuation principle is appropriate here.
    ¶51            We hold that any valuation approach must appraise the
    operating unit by its current usage to be competent. Property appraisal
    evidence is only competent “when it is derived by standard appraisal
    methods and techniques which are shown to be appropriate under the
    particular circumstances involved.” Inspiration Consol. Copper Co., 147 Ariz.
    at 223. Though derived by nominally standard methods, Mesquite’s
    appraisal is inappropriate under the circumstances because, by assuming
    the Purchase Agreement does not exist, it does not reflect the property as it
    is. Thus, Mesquite’s expert testimony is incompetent to rebut the statutory
    presumption.
    CONCLUSION
    ¶52           We vacate the tax court’s judgment and remand for the tax
    court to impose the statutory value. We vacate the tax court’s award of
    attorney’s fees, expert witness fees, and costs. We deny Mesquite’s request
    for appellate attorney’s fees, costs, and other expenses under A.R.S.
    § 12-348(B) because Mesquite did not prevail on the merits.
    AMY M. WOOD • Clerk of the Court
    FILED: AA
    14