Stateline Cooperative v. Property Assessment Appeal Board ( 2020 )


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  •                    IN THE COURT OF APPEALS OF IOWA
    No. 19-0674
    Filed November 4, 2020
    STATELINE COOPERATIVE,
    Plaintiff-Appellant/Cross-Appellee,
    vs.
    IOWA PROPERTY ASSESSMENT APPEAL BOARD,
    Defendant-Appellee/Cross-Appellant,
    and
    EMMET COUNTY BOARD OF REVIEW,
    Respondent-Appellee/Cross-Appellant.
    ________________________________________________________________
    Appeal from the Iowa District Court for Emmet County, Don E. Courtney,
    Judge.
    Parties appeal and cross-appeal following judicial review. AFFIRMED IN
    PART, REVERSED IN PART, AND REMANDED ON APPEAL; AFFIRMED ON
    CROSS-APPEAL.
    Brant D. Kahler, Adam C. Van Dike, and Steven C. Schoenebaum of Brown,
    Winick, Graves, Gross, Baskerville & Schoenebaum, P.L.C., Des Moines, for
    appellant.
    Brett Ryan of Watson & Ryan, PLC, Council Bluffs, for appellee Emmet
    County Board of Review.
    Bradley O. Hopkins and Jessica Braunschweig-Norris, Des Moines, for
    appellee Iowa Property Assessment Appeal Board.
    Heard by Mullins, P.J., and May and Schumacher, JJ.
    2
    MULLINS, Presiding Judge.
    StateLine Cooperative (StateLine) appeals the district court’s judicial-review
    ruling affirming the Iowa Property Assessment Appeal Board’s (IPAAB)
    administrative decisions following its review of the Emmet County Board of
    Review’s (ECBR) property-assessment determination. StateLine argues (1) the
    district court lacked jurisdiction to consider the ECBR’s cross-appeal of IPAAB’s
    decision on judicial review, (2) the court erred in affirming IPAAB’s decision that
    certain structures were not exempt from taxation as “[m]achinery used in
    manufacturing establishments” pursuant to Iowa Code sections 427A.1(1)(e) and
    427B.17(3) (2014), and (3) the court erred in concluding StateLine did not meet its
    evidentiary burden to value the exemption associated with the structures. The
    ECBR cross-appeals, essentially arguing its original assessment was made in
    accordance with the Iowa Real Property Appraisal Manual (manual) and was
    therefore correct.
    I.     Background Facts and Proceedings
    In 2013, StateLine constructed a feed manufacturing facility in Emmet
    County. In early 2014, the property was assessed at $4,272,900.00 for property-
    tax purposes.     The county assessor’s office hired a certified appraiser and
    assessor, Ted Goslinga, to appraise the property and approved his assigned
    assessment.     Upon direction from the Iowa Department of Revenue and the
    manual, Goslinga assessed the property using a cost-to-value approach, which
    values the property at cost, less depreciation. He testified that, if a particular item
    is included in the manual, then it is taxable, but if an item is not included in the
    manual, it is exempt.
    3
    Following the assessment, StateLine petitioned the ECBR for review of the
    assessment, claiming some of its “manufacturing machinery” was exempt and
    therefore improperly included in the assessed value. StateLine requested the
    assessed value be reduced to $870,700.00.             Relevant to this appeal are
    components of building one, the feed mill, and buildings five and six, grain storage
    bins. StateLine requested the value of building one be reduced by $1,633,900.00
    to exempt ingredient and load-out bins and the values of buildings five and six—
    including their aeration floors, fans, dryers, and power sweeps—be respectively
    reduced by $755,400.00 and $89,300.00, all as machinery used in a manufacturing
    establishment. Ultimately, the ECBR affirmed the property assessment. StateLine
    appealed to the IPAAB.
    According to testimony at the ensuing IPAAB hearing, ingredients other
    than corn are conveyed to the ingredient bins in building one where they are stored
    and eventually “flow out the bottom in a continuous flow process into the
    manufacturing process and other machinery.” At the top of the ingredient bins is
    a rotating, mechanical ingredient distributor that directs ingredients into the proper
    bin. An automated feed batching system then directs how much of each ingredient
    is to be released from the separate ingredient bins. The feed drops onto a scale
    and then into a four-ton mixer. Then it drops into a surge, which distributes it to a
    conveyor. If the product is meal feed, it is directed to the load-out bins, where it is
    held and then distributed out the bottom into semi-trucks for delivery. If the product
    is to be pellet feed, it is conveyed to a pelleter, where it is further processed, and
    then conveyed back to the load-out bins in building one. The load-out bins are
    4
    equipped with an air gate at the bottom, which is opened to release the feed into
    the trucks.
    StateLine’s chief financial officer (CFO) testified the $1,633,900.00 claimed
    exemption as to building one included all the foregoing component parts of building
    one. He also testified: “They’re all integral parts of the manufacturing process. It’s
    basically a continuous flow from beginning to end, and all these things are
    interconnected to all other pieces of machinery in the manufacturing process.” The
    feed department manager testified the materials entering and exiting the facility
    are “essentially continuously flowing.” There is an open area under the ingredient
    and load-out bins. The CFO valued the area at approximately $52,000.00 by
    multiplying its square footage of 2228 square feet by the value for square foot
    assigned by the assessor for similar building structures, $23.60.
    If the ingredient is corn, it is conveyed to buildings five and six upon delivery
    to the facility. When the corn reaches the buildings, it is either gravity-fed into
    building six or conveyed further and dumped into building five. Building five is the
    newer and larger steel grain storage bin. The bin is equipped with an aeration floor
    with holes in it and two fans. The fans pull air down through the aeration floor to
    ensure air movement and maintain the quality of the ingredients.             It is also
    equipped with a power sweep that pivots around the diameter of the bin. Building
    six is the smaller and older grain bin and contains the same components. 1 After
    reaching the bins, the corn gravity-flows through the holes in the bottom of the bins
    1 However, the power sweep was removed after the initial assessment for safety
    reasons.
    5
    and drops to reclaim conveyors that transport the corn to be rolled and then added
    to the other ingredients.
    A hearing was held before the IPAAB in October 2015. Following the
    hearing, the IPAAB took judicial notice of the manual. On February 26, 2016, the
    IPAAB, issued its ruling. The IPAAB accepted the parties’ stipulation that the
    subject property was a manufacturing facility. As to building one, the IPAAB found
    “insufficient evidence to show the entirety of the feed mill . . . bins are machinery
    used in a manufacturing establishment.” The IPAAB also found that some items
    within building one “could be machinery [but] StateLine has not shown the correct
    value of the exempt portions or the correct value of the remaining taxable portions
    of the property.” As to building five, the IPAAB found the aeration floor, fans and
    dryers, and power sweeps were exempt and respectively valued them at
    $39,100.00, $26,100.00, and $14,100.00. As to building six, the IPAAB found the
    same items were exempt and respectively valued them at $5300.00, $2800.00,
    and $3200.00.2 The IPAAB found the evidence insufficient to show the steel
    storage bins housing the foregoing items were machinery. As such, the IPAAB
    “affirm[ed] the assessment of the feed mill and grain storage bins.”
    On March 17, StateLine filed a petition for judicial review, challenging the
    IPAAB’s refusal to deem all or part of the feed mill and the steel grain bins exempt.
    On March 23, the ECBR filed a notice of cross-appeal. Thereafter, on April 7,
    StateLine moved to dismiss and strike the cross-appeal, arguing the ECBR was
    2 The IPAAB accepted StateLine’s purported valuations for each of the items it
    found exempt. These were the same values that were assigned by the assessor.
    The IPAAB found other items to be exempt, but they are generally irrelevant to this
    appeal.
    6
    required to file its own petition for judicial review to challenge the IPAAB’s ruling
    and the notice of cross-appeal was not filed within the time constraints of filing a
    petition for judicial review of agency action. The ECBR resisted, arguing, as a
    party in the contested agency proceeding, it timely appeared in the judicial-review
    proceeding. Later, StateLine moved for a remand to the IPAAB for the purpose of
    presenting additional evidence.
    Following a hearing, the district court denied the motion to dismiss and
    strike the cross-appeal. However, the court granted the motion for a limited
    remand and ordered the IPAAB “to receive additional evidence on, and determine,
    the portions and corresponding values of the feed mill building and two exterior
    grain bins.”
    The matter proceeded to a remand hearing before the IPAAB in August
    2017. At the hearing, StateLine only requested the IPAAB to change its position
    on whether the overhead bin portion of building one and the walls and roofs of
    buildings five and six were exempt.3
    StateLine presented testimony from its expert, commercial real estate
    appraiser Don Vaske, who appraised the feed mill in March 2017. In his testimony,
    3 In briefing and oral argument, StateLine asserted it did not concede the concrete
    floors or foundation of buildings five and six were not exempt. But at the remand
    hearing, StateLine noted the initial agency
    ruling in this matter made it clear that the concrete floor and
    foundation of [buldings five and six] were properly taxed. And
    StateLine is not arguing otherwise today. We are, however, arguing
    that the wall and roof of both of those grain bins are exempt as
    machinery used in manufacturing.
    Then, in its post-hearing brief, StateLine only argued the “walls and roofs”—not the
    concrete floors or foundations—should be exempt. The IPAAB had no reason to
    revisit the issue, and neither do we.
    7
    he noted the 2014 assessment separated building one into two components: (1)
    above grade and (2) the basement and tunnel. The assessment of building one
    did not include other structures built around the footprint of the overhead bins. The
    above-grade portion, including the ingredient and load-out bins, consisted of
    156,244 cubic feet. The basement and tunnel consisted of 3337 cubic feet. As to
    the above-grade portion, the assessor applied a cost per cubic foot of $6.40 and a
    replacement multiplier of 1.50 to reach an adjusted new replacement cost of
    approximately $1,499,943.00. The assessor then applied 2% depreciation to
    reach an assessment value of $1,469,950.00.4 As to the basement and tunnel,
    which StateLine agreed was not exemptible, the assessed value was $215,590.00.
    For his appraisal, Vaske separated the above-grade portion into two
    components: (1) the overhead bins and (2) the open space below them. With the
    footprint being 2228 square feet and the height of the open space below the bins
    being eighteen feet, he calculated the open space to be 40,104 cubic feet. At a
    cost per cubic foot of $9.41, Vaske assessed the open space value at
    $377,400.00.5 Vaske then subtracted that value from the assessor’s total above-
    grade assessed value of $1,469,950.00 to reach an appraised value for the
    4 The product of these figures is $1,469,944.14. We presume the assessor prefers
    to work in convenient numbers. We also note numbers were rounded to nearest
    whole dollars along the way.
    5 This is also a rounded number. It appears Vaske ran his calculation differently
    than the assessor. The assessor began with the cost per cubic foot of $6.40 and
    applied the 1.50 multiplier to reach an adjusted new replacement cost. Then the
    assessor factored in the 2% depreciation to reach an assessed value. Vaske
    simply divided the assessor’s assessed value of $1,469,950.00 by the 156,244
    cubic feet of above-grade space to reach a cubic foot price of $9.41. This would
    essentially be the equivalent of factoring in the depreciation before reaching an
    adjusted new replacement cost.
    8
    overhead bins of $1,092,550.00. Similarly, the record shows the construction cost
    of the “modular bin system,” which was completed shortly before the 2014
    assessment, was $1,032,500.00.
    As to building five, Vaske noted the assessor assigned a base cost to the
    actual structure—limited to the concrete floor, walls, and roof—of $697,000.00 and
    applied 3% depreciation to reach an assessed value of $676,100.00.
    As to building six, Vaske explained the assessor assigned a base cost to
    the structure—again, limited to the concrete floor, walls, and roof—of $193,000.00,
    applied a multiplier of 1.01 to reach an adjusted cost of $194,930.00, and factored
    in 60% depreciation to reach an assessed value of $78,000.00.
    For his appraisal, Vaske separated the assessed values of buildings five
    and six into two components: (1) the walls and roof and (2) the foundation. He
    interviewed three companies relative to the costs associated with constructing bins
    of similar size and capacity, including the foundation, structure, and associated
    equipment, such as “doors, ladders, vents, cables, sweep augers, fans, etc.” One
    professional opined the concrete floor would account for 20–25% of the total cost
    for the larger bin and 25–30% for the smaller bin. The second reported the
    concrete component accounted for 29% of the cost on a recently completed bin he
    constructed. The third professional’s estimated figures were generally in line with
    the first two. Based on his investigation he concluded the concrete portion of each
    grain bin would account for 25% of the entire structure. So Vaske took 25% of the
    assessed value of buildings five and six, including their components, $755,400.00
    and $89,300.00, respectively, to reach values of the concrete floors in the amount
    of $188,850.00 and $22,325.00, respectively. He then subtracted those figures
    9
    from the assessed values allocable to the structures—including the concrete
    floors, walls, and roofs—to reach values allocable to the walls and roof of each
    building of $487,250.00 and $55,675.00.
    In March 2018, the IPAAB issued its remand decision.             The IPAAB
    concluded:
    StateLine has not shown the overhead bins (ingredient and loadout)
    or the large/small exterior grain bin[s’] walls and roof are machinery.
    We do not believe any of them would commonly be understood to be
    machinery. Their primary purpose is to hold raw material, protecting
    it from elements, until it is needed in the manufacturing process.
    The IPAAB added that, had StateLine proved the items were machinery, then it
    was also required to show the amount of the assessment attributable to those
    items, and it was “not convinced that Vaske’s allocations accurately reflect the
    value of the property StateLine believes to be exempt.” As to the exterior grain
    bins, while finding Vaske’s methodology sound, the IPAAB noted he failed to
    account for site work or how it would be allocated. As to the overhead bins, the
    IPAAB found Vaske’s straight-line, cubic-foot estimate “does not necessarily result
    in an accurate valuation” of the components of the structure. The IPAAB affirmed
    its prior ruling.
    In April, StateLine filed an amended petition for judicial review. Following
    briefing from the parties, the district court entered its judicial-review decision,
    affirming the IPAAB’s decision. StateLine appeals, and the ECBR cross-appeals.
    10
    II.    Scope and Standard of Review
    “Judicial review of agency decisions is governed by Iowa Code section
    17A.19” (2016).6 Brakke v. Iowa Dep’t of Nat. Res., 
    897 N.W.2d 522
    , 530 (Iowa
    2017) (quoting Kay-Decker v. Iowa State Bd. of Tax Rev., 
    857 N.W.2d 216
    , 222
    (Iowa 2014)); accord Warren Props. v. Stewart, 
    864 N.W.2d 307
    , 311 (Iowa 2015).
    The district court acts in an appellate capacity in judicial-review proceedings. Iowa
    Med. Soc’y v. Iowa Bd. of Nursing, 
    831 N.W.2d 826
    , 838 (Iowa 2013). On appeal,
    this court “appl[ies] the standards of section 17A.19(10) to determine if we reach
    the same results as the district court.” 
    Brakke, 897 N.W.2d at 530
    (quoting Renda
    v. Iowa Civil Rights Comm’n, 
    784 N.W.2d 8
    , 10 (Iowa 2010)); accord Des Moines
    Area Transit Auth. v. Young, 
    867 N.W.2d 839
    , 842 (Iowa 2015). Relief in a judicial-
    review proceeding is appropriate only “if the agency action prejudiced the
    substantial rights of the petitioner and if the agency action falls within one of the
    criteria listed in section 17A.19(10)(a) though (n).” 
    Brakke, 897 N.W.2d at 530
    .
    III.   Jurisdiction
    StateLine argues the district court lacked subject matter jurisdiction to
    consider the ECBR’s cross-appeal and therefore erred in denying its motion to
    dismiss. Our review of subject matter jurisdiction is for correction of errors at law.
    Iowa Individual Health Benefit Reins. Ass’n v. State Univ. of Iowa, 
    876 N.W.2d 800
    , 804 (Iowa 2016).
    6References in this opinion to Iowa Code chapter 17A are to the version of the
    code in force when the petition for judicial review was filed, 2016. Unless otherwise
    noted, references to other chapters of the code are to the code in force when the
    administrative proceeding was initiated, 2014.
    11
    The IPAAB filed its first ruling on February 26, 2016. The letter of disposition
    was postmarked for mailing on February 29. The order provided: “Any judicial
    action challenging this Order shall be filed in the district court where the property
    is located within 20 days of the date of this Order and comply with the requirements
    of Iowa Code sections 441.38, 441.38B, 441.39; and Chapter 17A.” Section
    441.38 requires notices of appeal from the IPAAB to be filed in the district court
    “within twenty days after the letter of disposition of the appeal by the [IPAAB] is
    postmarked to the appellant.” Section 441.38B provided parties could seek judicial
    review in accordance with chapter 17A and section 441.38.7 Chapter 17A provides
    a petition for judicial review “must be filed within thirty days after the issuance of
    the agency’s final decision in that contested case.”          Iowa Code § 17A.19(3).
    Section 17A.19 also provides it is “the exclusive means by which a person or party
    . . . may seek judicial review of . . . agency action” “[e]xcept as expressly provided
    otherwise by another statute referring to [chapter 17A] by name.”
    StateLine filed its petition for judicial review on March 17. ECBR filed its
    notice of cross-appeal on March 23. The parties appear to agree that the deadline
    to commence a proceeding in the district court was March 20. StateLine is of the
    position that the filing of the cross-appeal beyond that date deprived the district
    court of jurisdiction and, because chapter 17A provides no mechanism for filing a
    cross-appeal in an action for judicial review, the ECBR was required to file its own
    timely petition for judicial review. StateLine relies on City of Hiawatha v. City
    Development Board, 
    609 N.W.2d 532
    , 537 (Iowa 2000), to support its position. In
    7   Section 441.38B was repealed in 2017. 2017 Iowa Acts ch. 151, § 26.
    12
    that case, the city of Robins approved applications for voluntary annexation and
    requested approval from the city development board. 
    Hiawatha, 609 N.W.2d at 534
    .   Shortly thereafter, the city of Hiawatha filed a petition for involuntary
    annexation that included land common to the voluntary annexation sought by
    Robins.
    Id. Then, Hiawatha filed
    a voluntary annexation application as to two
    parcels that were included in the application submitted by Robins.
    Id. The board amended
    the Robins application to exclude those two parcels, approved
    Hiawatha’s annexation of those parcels, and approved annexation of the
    remainder of the contested area to Robins.
    Id. The board issued
    its findings of
    fact and conclusions of law on August 11, 1997, and Hiawatha filed a petition for
    judicial review on September 9.
    Id. at 534–35.
    Robins did not petition for judicial
    review but instead intervened in the proceeding initiated by Hiawatha.
    Id. at 535.
    The district court ultimately affirmed, after which Hiawatha appealed and Robins
    cross-appealed. On cross-appeal, Robins complained of the board removing the
    two parcels from its application and assigning them to Hiawatha.
    Id. at 537.
    The
    supreme court stated, “The problem with this argument is that Robins did not
    petition for judicial review” and “we see nothing in chapters 17A or 368 that would
    permit an aggrieved party to challenge the ruling in that manner.”
    Id. Viewing that language
    in isolation would arguably support StateLine’s jurisdictional challenge.
    But we do not read the language in isolation. In Hiawatha, the “board’s decision
    allowing Hiawatha to annex the two parcels in question was . . . issued on April 9,
    1997” and “Hiawatha’s annexation of the two parcels became complete upon the
    expiration of the time for review of the board’s decision” and proper filings.
    Id. At the time,
    a city could appeal a decision of the development board within thirty days
    13
    by petitioning for judicial review. See Iowa Code § 368.22 (1997). What the
    supreme court was saying was Robins was required to petition for judicial review
    before the annexation became final following issuance of the April 9, 1997 decision
    of the board, which it did not. See 
    Hiawatha, 609 N.W.2d at 537
    . By the time
    Hiawatha petitioned for judicial review, the issue Robins raised on cross-appeal
    was already final for statutory and judicial purposes, so the district court had no
    jurisdiction to consider it. See
    id. What the supreme
    court did not say, StateLine’s
    argument on this point, is that each party to a judicial-review proceeding is required
    to file its own petition.
    We agree with StateLine that “a timely petition to the district court is a
    jurisdictional prerequisite for judicial review of final agency action.”       See
    id. Judicial-review proceedings are
    commenced by filing a timely application for
    judicial review in the proper venue. See Iowa Code § 17A.19(2). StateLine did
    so, and conferred jurisdiction on the district court to conduct judicial review.
    Following conferral of jurisdiction, “[a]ny party of record in a contested case before
    an agency wishing to intervene and participate in the review proceeding” may do
    so by filing “an appearance within forty-five days from the time the petition is filed.”
    Id. StateLine does not
    dispute that ECBR timely intervened. Instead, StateLine
    argues, “As an intervenor, the ECBR cannot expand the scope of the judicial
    review action” through its intervention. StateLine again relies on Hiawatha, which
    we find misplaced.          Unless inconsistent with chapter 17A, “the rules of civil
    procedure shall be applicable to proceedings for judicial review of agency action.”
    Iowa R. Civ. P. 1.1601. Because “[a]n intervenor may join with petitioner or
    respondent or claim adversely to both,” Iowa R. Civ. P. 1.1603(1), an intervenor
    14
    can certainly expand the scope of judicial review beyond the petitioner’s requests
    for relief. Following the analysis of Doerfer Division of CCA v. Nicol, 
    359 N.W.2d 428
    , 436–37 (Iowa 1984), we have specifically held “that a district court has
    jurisdiction to review claims for affirmative relief by a cross-claimant even though
    the cross-claimant did not file a petition for judicial review.” Consumer Advoc. Div.
    v. Utils. Bd., 
    423 N.W.2d 552
    , 552–53 (Iowa Ct. App. 1988).
    Based upon the foregoing, we reject StateLine’s jurisdictional and related
    challenges.
    IV.    Machinery Used in a Manufacturing Establishment
    A.     Appeal
    StateLine argues the district court erred in affirming the IPAAB’s decision.
    The overarching argument appears to be that the IPAAB and district court
    misinterpreted section 427A.1(1)(e) to not include buildings one, five, and six.
    We review issues of statutory interpretation for correction of errors at law.
    Jahnke v. Deere & Co., 
    912 N.W.2d 136
    , 141 (Iowa 2018). In interpreting a statute,
    “[w]e start with the often-repeated goal of statutory interpretation which is to
    discover the true intention of the legislature.” Gardin v. Long Beach Mortg. Co.,
    
    661 N.W.2d 193
    , 197 (Iowa 2003). The “first step in ascertaining the true intention
    of the legislature is to look to the statute’s language.”
    Id. “If the statute
    is
    unambiguous, we look no further than the statute’s express language.” Kay-
    
    Decker, 857 N.W.2d at 223
    (quoting Rolfe State Bank v. Gunderson, 
    794 N.W.2d 561
    , 564 (Iowa 2011)). “If, however, the statute is ambiguous, we inquire further
    to determine the legislature’s intent in promulgating the statute.”
    Id. “A statute is
                                            15
    ambiguous when reasonable minds could disagree as to its meaning.” Naumann
    v. Iowa Prop. Assessment Appeal Bd., 
    791 N.W.2d 258
    , 261 (Iowa 2010).
    1.     The exemption and its breadth
    The assessor “shall [c]ause to be assessed” all property in the county
    “except property exempt from taxation.” Iowa Code § 441.17(2). Property defined
    in Iowa Code section 427A.1(1)(e), which is first assessed for taxation on or after
    January 1, 1995, shall be exempt from taxation.
    Id. § 427B.17(3). Section
    427A.1(1)(e) encompasses: “Machinery used in manufacturing establishments.
    The scope of property taxable under this paragraph is intended to be the same as,
    and neither broader nor narrower than, the scope of property taxable under section
    428.22, Code 1973, prior to July 1, 1974.” Iowa Code section 428.22 (1973)
    contemplated “Machinery deemed real estate,” and provided, “Machinery used in
    manufacturing establishments shall, for the purpose of taxation, be regarded as
    real estate.” While section 428.20 of the 1973 and current codes define who a
    “manufacturer” is—and the parties agree StateLine operates a “manufacturing
    establishment”—neither defines what “machinery” is.
    We begin with the breadth of what is covered by the statute. StateLine is
    of the position that “[t]he exemption should be interpreted broadly.” Our supreme
    court has said as much when it considered whether a manufacturing company’s
    “cupola, vertical annealing furnace, and smokestack” were manufacturing
    machinery and therefore exempt from taxation. Griffin Pipe Prods. Co., Inc. v. Bd.
    16
    of Rev. of Cnty. of Pottwattamie, 
    789 N.W.2d 769
    , 770, 775 (Iowa 2010).8 The
    court described the manufacturer and its fixtures as follows:
    Griffin Pipe Products Co., Inc. is a manufacturer of ductile iron pipe
    products with a foundry located in Council Bluffs, Iowa. The
    foundry’s physical plant includes a cupola, a vertical annealing
    furnace, and a steel exhaust stack. The cupola occupies three floors
    and extends above the roofline of the main production building and
    is used to melt the metals during the casting process. The vertical
    annealing furnace, which sits in the basement of the main production
    building and rises above the main floor of the plant, is used to alter
    the hardness and add strength to metal. The exhaust stack is
    connected to the exterior of the primary production building and vents
    hot gases and fine particulate matter generated by the smelting
    process.
    Id. at 770.
    The assessor included the value of the fixtures in its assessment.
    Id. The “narrow question”
    of whether “‘[m]achinery used in manufacturing
    establishments’ under Iowa Code section 427A.1(e) includes within its scope
    common law fixtures” made its way to the supreme court.
    Id. at 773
    (alteration in
    original). Iowa authority on the issue was limited. The court acknowledged it had
    previously concluded a plant’s “water systems, air separators, dust collectors, and
    truck turn around fell within the scope of a precursor to paragraph (e), then Iowa
    Code section 428.22 (1950).”
    Id. (discussing Nw. States
    Portland Cement Co. v.
    Bd. of Rev., 
    58 N.W.2d 15
    , 19–21 (Iowa 1953)).           The court also noted the
    regulatory language of Iowa Administrative Code rule 701-71.7—“that machinery
    under Iowa Code section 427A.1(1)(e) ‘shall include all machinery used in
    8  In oral argument, the ECBR took the position Griffin Pipe is inapposite on the
    issue of the breadth the term machinery is entitled because that case only
    considered whether fixtures could fall within the meaning of machinery. Because
    the items claimed exempt in this appeal generally amount to fixtures, we find Griffin
    Pipe applicable. In any event, as discussed below, the supreme court extended
    its holding beyond fixtures to include movable items. Griffin 
    Pipe, 789 N.W.2d at 775
    .
    17
    manufacturing establishments’”—“suggests that subsection (e) must be given a
    broad interpretation to include common law fixtures.”
    Id. at 774.
    The court also
    noted the “lack of qualifying language” and “express words of limitation indicates
    that the legislature did not intend to limit the scope of section 427A.1(1)(e).”
    Id. The court concluded
    the statutory and regulatory scheme implied “that all
    machinery, attached or unattached, fixtures or movable items, falls within the
    scope of paragraph (e).”
    Id. at 775. 2.
        Interpretation
    Having concluded machinery under section 427A.1(1)(e) is entitled to a
    broad interpretation, we consider whether buildings one, five, and six fall within the
    meaning of the statute.      As noted, machinery is not statutorily defined.        A
    department of revenue regulation that classifies real estate provides, “Machinery
    includes equipment and devices, both automated and nonautomated, which is
    used in manufacturing as defined in Iowa Code section 428.20.” Iowa Admin.
    Code. r. 701-71.1(7)(b). Where “the legislature has not defined words of a statute,
    we may refer to prior decisions of this court and others, similar statutes, dictionary
    definitions, and common usage.” Jack v. P & A Farms, Ltd., 
    822 N.W.2d 511
    , 516
    (Iowa 2012) (citation omitted).
    Machinery has been defined to include “machines in general or as a
    functioning unit,” as well as “the means or system by which something is kept in
    action or a desired result is obtained.”           Merriam Webster, Machinery,
    https://www.merriam-webster.com/dictionary/machinery. In the tax context, “[t]o
    be exempt, the machinery must be used primarily in manufacturing, and be
    18
    essential to the manufacturing process.” 71 Am. Jur. 2d State & Local Taxation
    § 267 (Aug. 2020 update).
    The machinery and equipment of an industrial establishment to be
    excluded from taxation are those which are used directly in
    manufacturing the products that the establishment is intended to
    produce and are necessary and integral parts of the manufacturing
    process and are used solely for effectuating that purpose; on the
    other hand, excluded from this category are machinery and
    equipment which benefit the land generally and which may serve
    various users of the land and structures which are not necessary and
    integral parts of the manufacturing process and which are separate
    and apart therefrom. A utility’s smokestacks, cooling towers, and
    water intake facility are integral to its generation of electricity and
    used solely for that purpose and, thus, exempt. Communications
    towers, on the other hand, which transfer and receive signals and
    are not involved in producing a product, are not exempt.
    84 C.J.S. Taxation § 332 (June 2020 update) (footnotes omitted).
    In one case, the Wisconsin Court of Appeals considered whether silos at a
    concrete-manufacturing facility were exempt under a statute exempting the
    following property:
    Manufacturing machinery and specific processing equipment,
    exclusively and directly used by a manufacturer in manufacturing
    tangible personal property.      In this section, “manufacturing
    machinery and specific processing equipment” means any
    combination of electrical, mechanical or chemical means, including
    special foundations therefor, designed to work together in the
    transformation of materials or substances into new articles or
    components, including parts therefor, regardless of ownership and
    regardless of attachment to real property. This shall not be
    construed to include materials, supplies, buildings or building
    components; nor shall it include equipment, tools or implements
    used to service or maintain manufacturing machinery or equipment.
    Geis v. City of Fond Du Lac, 
    409 N.W.2d 148
    , 150 (Wis. Ct. App. 1987) (quoting
    Wis. Stat. § 70.11(27)). The court described the silos as follows:
    The silos [are] used to store the sand and stone [and] have probes
    and weeping holes. These silos assure a consistent mix in the
    gravel, prevent the “fines” (very fine sand) from blowing away and
    19
    allow the moisture content of the sand to be monitored and regulated
    through the use of probes and weeping holes. The silos also prevent
    the sand from being contaminated with mud or other impurities.
    Id. at 149.
    Because the silos were “necessary to preserve the integrity of the sand
    and gravel,” the court concluded “[t]he storage purpose is vital to the manufacturing
    process, making the silos an integral part of the manufacturing process and
    therefore tax-exempt.”
    Id. at 151.
    In another case, the Supreme Court of Minnesota considered whether oil
    storage tanks were exempt as “equipment” under the following statutory scheme:
    For the purposes of taxation, “real property” includes the land itself,
    rails, ties, and other track materials annexed to the land, and all
    buildings, structures, and improvements or other fixtures on it,
    bridges of bridge companies, and all rights and privileges belonging
    or appertaining to the land, and all mines, minerals, quarries, fossils,
    and trees on or under it.
    ....
    The term real property shall not include tools, implements,
    machinery, and equipment attached to or installed in real property
    for use in the business or production activity conducted thereon,
    regardless of size, weight or method of attachment.
    Barton Enters., Inc. v. Ramsey Cnty., 
    390 N.W.2d 776
    , 777 (Minn. 1986) (quoting
    Minn. Stat. § 272.03(1)(a), (c)(i) (1984)). The manufacturer and storage tanks
    were described as follows:
    Barton sells asphalt cement (residual oils) and fuel oils, primarily to
    construction companies. The oils are stored in 11 tanks . . . . The
    tanks are interconnected by pipes, and pumps are used to transfer
    oils from receiving to loading stations, to blend oils to the desired
    grades, and to maintain the specified grades of the asphalts, which
    change character frequently because they are held at a temperature
    of 300°F.
    Id. The court agreed
    with the tax court that the basic function of the tanks was to
    provide containment or shelter and was therefore not exempt. See
    id. at 777–78. 20
    A string of cases has emerged from Pennsylvania.          In one case, the
    supreme court found oil storage tanks in which physical and chemical processes
    necessary to the process of the manufactured product take place are excluded
    from tax assessment as machinery used in manufacturing.          Gulf Oil Corp. v.
    Philadelphia, 
    53 A.2d 250
    , 250, 254 (Pa. 1947). In a later case, the supreme court
    considered whether the following exemption from taxability of real property and
    fixtures applied to property of a steel manufacturer: “Machinery, tools, appliances
    and other equipment contained in any mill, mine, manufactory or industrial
    establishment shall not be considered or included as a part of the real estate in
    determining the value of such mill, mine, manufactory or industrial establishment.”
    Appeal of Borough of Aliquippa, 
    175 A.2d 856
    , 859 (Pa. 1961) (citation omitted).
    The court explained the exemption applies to any improvements used “directly in
    manufacturing” that “are necessary and integral parts of the manufacturing process
    and are used solely for effectuating that purpose.”
    Id. at 861.
    The court also
    directed that structures that “are not necessary and integral parts of the
    manufacturing process,” such as “[a] structure used for storage,” “is part of the
    realty and subject to real estate taxation.”
    Id. at 861–62.
    The Pennsylvania court had the opportunity to apply and build upon
    Aliquippa in a subsequent case concerning the property of a steel manufacturer.
    See U.S. Steel Corp. v. Bd. of Assessment and Revision of Taxes of Buck Cnty.,
    
    223 A.2d 92
    , 95–97 (Pa. 1966). The court found a railroad track serving as a
    conveyor belt transferring materials from one processing station to another clearly
    fell within the exemption.
    Id. at 95.
    The court described the ore-yard facilities to
    be
    21
    used not only as a transshipment and temporary storage area
    (providing a ‘surge’ or reserve capacity for a three to ten days’ supply
    or ore for the blast furnaces) for iron ore as discharged from the water
    or rail carriers, but also constitute receptacles used fundamentally
    and primarily for the programmed spreading, layering and blending
    of the nonuniform shipments of grades and sizes of ore received in
    various cargoes, so as to achieve uniformity for processing in respect
    to chemical analysis and physical characteristics. On the floor of the
    ore yard is located movable crushing machinery used in the
    processing of the ore and the ore yard facilities are peculiarly
    designed for and used directly in the manufacturing process for the
    production of iron.
    Id. at 95–96
    (altered for readability). The court concluded, the facilities “are a
    necessary and integral part of the equipment used in such processes and, except
    for the incidental and temporary storage feature, are availed of solely for such
    purposes.”
    Id. at 96.
    The court also considered whether “blast furnace stock bins” were taxable.
    Those bins were described as follows:
    The blast furnace stock bins are steel structures which contain surge
    receptacles designed for the in-process purpose of assembling and
    temporarily holding the various materials used directly to supply the
    blast furnaces themselves. Iron ore, limestone and other ingredients
    are carried or deposited into the blast furnace stock bins through
    grids or openings in a railway trestle which is supported by the stock
    bins structure. Each such material is then drawn by gravity from the
    bins in a pre-determined amount into special-purpose cars, weighed
    and ultimately transported to, and charged or deposited within, one
    of the three blast furnaces.
    Id. The court found:
    “While these bins have an incidental, temporary or ‘in-transit’
    storage aspect, their primary purpose is to serve directly as a material-handling
    facility for the gathering, combining and mixing of raw materials in the process flow
    to the blast furnaces.”
    Id. The court concluded
    the bins were not merely storage
    facilities and found them exempt from taxation.
    Id. The court went
    on to analyze
    several other components of the manufacturing facility.
    Id. at 96–97. 22
    The next case considered whether three ammonia tanks fell within the tax-
    assessment exemption. See U.S. Steel Corp. v. Bd. of Revision of Taxes &
    Appeals of City of Clarion, 
    366 A.2d 637
    , 637–38 (Pa. Commw. Ct. 1967). After
    analyzing the two foregoing cases from the state high court, the Pennsylvania
    Commonwealth Court found the ammonia tanks’ storage capabilities were “neither
    incidental nor temporary,” were “used primarily for the storage of ammonia,” and
    their “purification and quality control processes are incidental to the primary
    functions of the structures as storage tanks.”
    Id. at 639.
    Because the “tanks are
    not used ‘directly’ in the manufacture of ammonia, nor are they ‘necessary and
    integral parts of the manufacturing process,’” the court concluded they were
    taxable.
    Id. at 639.
    Next, the Pennsylvania Commonwealth Court considered the taxability of
    oil tanks that served a purpose “in the refining process to heat the oil, remove water
    from the crude and agitate the oil to effect a standard mix.” See Gulf Oil Corp. v.
    Delaware Cnty. Bd. of Assessment Appeals, 
    489 A.2d 321
    , 322, 324 (Pa. Commw.
    Ct. 1985). The court found the tanks were essential in refining crude oil and not
    subject to taxation.
    Id. at 325.
    Lastly, the Commonwealth Court of Pennsylvania also considered the
    taxability of oil storage tanks described as follows:
    17. The construction of the three tanks occurred
    simultaneously with the installation of oil-fired boilers when the
    Springdale Plant was converted from coal to oil.
    18. Each of the tanks is connected by piping to a pumphouse
    and, in turn, to two oil-fired boilers in the main plant building.
    19. Heavy oil is pumped from barges on the Allegheny River
    into the three oil tanks, where the oil is stored until needed to fire the
    boilers.
    23
    20. Each tank is fitted with steam heating elements connected
    to small boilers, which heating elements are used to heat the heavy
    oil prior to use so that it is liquid enough to flow through the piping
    that connects the tanks to the boilers.
    ....
    22. Once heated, oil is pumped from the tanks and fired in the
    boilers, producing steam which drives the turbines, which drive the
    generators, which produce electricity.
    23. The oil from the tanks is the sole source of fuel for the
    boilers.
    24. Two of the three tanks have not held oil since
    approximately 1984.
    W. Penn Power Co. v. Bd. of Prop. Assessment Appeals & Rev., 
    588 A.2d 997
    ,
    999 (Pa. Commw. Ct. 1991). The tanks were deemed to not fall under the
    exemption statute.
    Id. The court held
    “the oil tanks do not qualify as machinery or
    equipment used in manufacturing” because “a structure that is only used for
    storage does not meet the requirements of the exclusion.”
    Id. at 1000.
    The court
    distinguished Gulf Oil Corp. v. Delaware County Board of Assessment Appeals on
    the basis that, “[a]lthough there is incidental heating while the oil is stored in the
    tank,” the tanks are used only for storage of fuel and are not an integral part of the
    process for generating power.”
    Id. Finally, the Kentucky
    Court of Appeals has considered “whether machinery
    used by distilleries in bottling whiskey” was exempt from taxation as manufacturing
    machinery. Burke v. Stitzel-Weller Distillery, 
    145 S.W.2d 861
    , 862 (Ky. Ct. App.
    1940). Following production, the whiskey was barreled, after which some of the
    whiskey was bottled. See
    id. at 862–63.
    The lower court concluded the machinery
    used in bottling the whiskey was exempt from taxation.
    Id. at 863.
    Local officials
    appealed, contending the manufacturing of the whiskey was complete upon
    barreling, and the bottling machinery was not used in the course of the
    24
    manufacturing process.
    Id. The court of
    appeals disagreed, concluding
    manufacturing machinery includes “all things necessary to make it ready to be put
    on the market so as to be sold to the consuming public for the purpose for which it
    was intended.”
    Id. at 864.
    With the foregoing in mind, we proceed to the questions in this appeal.
    3.     Buildings one, five, and six
    Again, machinery, for purposes of the statute, is not defined. That is likely
    for good reason. On the spectrum from machinery to non-machinery, one could
    easily classify an item falling on the polar opposites of either end. There is of
    course a gray area, where the items in this case fall, in which the “I know it when I
    see it” approach is unhelpful. We find it unnecessary to define what amounts to
    machinery, as the assessment of what falls within the statute must logically be
    made based on the circumstances on a case-by-case basis.
    We turn to the circumstances of this case. Corn and other ingredients are
    conveyed to the ingredient bins in building one and buildings five and six, each of
    which are essentially temporary storage facilities. The ingredients are then fed
    into machinery to produce a finished product. The product then makes its way to
    the load-out bins, where it is held until loaded into trucks for delivery.       The
    structures essentially amount to nonautomated equipment.          See Iowa Admin.
    Code. r. 701-71.1(7)(b); see also Black’s Law Dictionary, Equipment (11th ed.
    2019) (“The articles or implements used for a specific purpose or activity (esp. a
    business operation).”). With the exception of the load-out bins, the structures are
    “used directly in manufacturing the products that the establishment is intended to
    produce and are necessary and integral parts of the manufacturing process.” 84
    25
    C.J.S. Taxation § 332. Similar to the ore-yard facilities and blast furnace stock
    bins in United States Steel, the ingredient bins’ and grain bins’ storage feature is
    only temporary and incidental, and their primary purpose is to serve directly in the
    manufacturing 
    process. 223 A.2d at 95
    –96. As such, we find the ingredient bins
    in building one and buildings five and six fall within the meaning of machinery under
    section 427A.1(1)(e). The load-out bins, however, are not used directly in the
    manufacturing process, and they only contain finished product “ready to be put on
    the market so as to be sold to the consuming public for the purpose for which it
    was intended.” See 
    Burke, 145 S.W.2d at 864
    . As such, we conclude the load-
    out bins do not fall within the meaning of machinery under section 427A.1(1)(e).
    B.     Cross-Appeal
    On cross-appeal, the ECBR appears to argue the assessor properly
    followed the manual in conducting its assessment and the original assessment is
    therefore correct. We are not convinced. While the assessor is required to use
    the manual as a tool in valuing property, we do not find it to be legally controlling
    on the question of whether a particular item of property is taxable or exempt. While
    the legislative and executive branches are respectively entitled to enact and
    enforce the law, interpretation and construction of the law belongs to the courts.
    16 Am. Jur. 2d Constitutional Law § 266 (Aug. 2020 update). As such, the
    department of revenue manual does not bind us.
    V.     Valuation
    StateLine argues the district court erred in affirming the IPAAB’s conclusion
    that StateLine failed to meet its evidentiary burden as to the valuation of its claimed
    exemptions. The ECBR generally claims StateLine was required to show the total
    26
    value of the assessable property, not the total assessed value less the claimed
    exemption. We find no such requirement and disagree. Evidence was presented
    concerning the total value of the structures and of the claimed exemptions.
    Because we find sufficient evidence in the record to reach values of the claimed
    exemptions, we conclude the IPAAB and court acted unreasonably, arbitrarily, or
    capriciously in declining to value the claimed exemptions, which prejudiced the
    substantial rights of StateLine. See Iowa Code § 17A.19(10)(n). We proceed to
    the merits and modify as follows.
    StateLine’s expert valued the overhead bins at $1,092,550.00. The ECBR’s
    own expert valued the overhead bins at $778,240.00. The evidence presented
    shows the assessor assessed the feed mill based on its cubic footage. The record
    also shows the ingredient bins occupy in the neighborhood of 47,280 cubic feet.
    Applying the assessor’s cost per cubic foot of $6.40, the 1.50 replacement
    multiplier, and 2% depreciation, the ingredient bins’ value amounts to $444,810.24,
    and we find the assessment should be reduced by that amount to reflect the
    exemption of the ingredient bins as machinery used in manufacturing.9
    As to the exterior grain bins, while finding Vaske’s methodology sound, the
    IPAAB noted he failed to account for site work or how it would be allocated. As a
    result, the IPAAB noted it would value the foundation cost for those buildings at
    30%, as opposed to the 25%.
    9Applying the same methodology, we would value the roughly 24,576 cubic feet
    occupied by the load-out bins at $231,211.01. But the load-out bins are not exempt
    as machinery.
    27
    For building five, Vaske began with the assessor’s assigned base cost of
    $697,000.00 and applied 3% depreciation to reach a value of $676,100.00 as to
    the foundation, walls, and roof. As to building six, he began with the base cost of
    $193,000.00 and applied an adjustment multiplier of 1.01 and 60% depreciation to
    reach a value of $78,000.00 as to the same components.
    The replacement cost assigned by the assessor for the buildings was
    $755,400.00 and $89,300.00. The IPAAB agreed 30% of that cost would be
    attributable to the foundation and, upon our review of the evidence, we agree. So
    the foundations would be valued at $226,620.00 and $26,790.00, which is not
    exempt. $79,300.00 worth of building five’s components and $11,300.00 worth of
    building six’s components were already determined to be exempt. That leaves
    $449,480.00 and $51,210.00 attributable to the walls and roof, which we conclude
    is exempt from taxation as machinery.
    VI.    Conclusion
    We conclude the ingredient bins and exterior grain bins, but not the load-
    out bins, amount to machinery used in a manufacturing facility and are exempt
    from taxation. We reverse the district court’s affirmance of the IPAAB on that point.
    Because we find sufficient evidence in the record to reach values of the claimed
    exemptions, we conclude the IPAAB and court erred when they declined to do so.
    We value the additional exemptions for building one at $444,810.24, building five
    at $449,480.00, and building six at $51,210.00. We remand to the district court for
    entry of an order consistent with this opinion.
    AFFIRMED IN PART, REVERSED IN PART, AND REMANDED ON
    APPEAL; AFFIRMED ON CROSS-APPEAL.