Zimmer & Francescon, Inc. v. Rice Lake Contracting Corp. ( 2017 )


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  •                    IN THE COURT OF APPEALS OF IOWA
    No. 16-0934
    Filed May 3, 2017
    ZIMMER & FRANCESCON, INC.,
    Plaintiff-Appellee,
    vs.
    RICE LAKE CONTRACTING CORP.,
    Defendant-Appellant.
    ________________________________________________________________
    Appeal from the Iowa District Court for Linn County, Sean W. McPartland,
    Judge.
    General contractor Rice Lake appeals the district court’s ruling in favor of
    its equipment supplier following a bench trial on the parties’ breach-of-contract
    claims. AFFIRMED.
    Jeffrey A. Stone of Simmons Perrine Moyer Bergmann P.L.C., Cedar
    Rapids, and Nathan R. Sellers of Fabyanske, Westra, Hart & Thomson, P.A.,
    Minneapolis, Minnesota, for appellant.
    Daniel P. Kresowik of Stanley, Lande & Hunter, P.C., Davenport, for
    appellee.
    Heard by Vaitheswaran, P.J., and Tabor and Mullins, JJ.
    2
    TABOR, Judge.
    Rice Lake Contracting Corporation appeals the district court’s ruling that
    Rice Lake’s supplier, Zimmer & Francescon, Inc. (Z&F), met its contractual
    obligation to deliver four new motors for intermediate lift pumps as part of a major
    project undertaken by the City of Cedar Rapids following the 2008 flood.1 Rice
    Lake contends the rejection of Z&F’s motors by the city and its design engineer,
    HDR, is binding not only on Rice Lake under its prime contract with the city but
    also on Z&F under its separate supply contract with Rice Lake. During oral
    arguments, Rice Lake claimed the district court erred in substituting its judgment
    for HDR’s decision that Z&F’s motors did not meet the project’s “design intent.”
    According to Rice Lake, the court was not authorized to analyze the terms of its
    supply contract with Z&F given HDR’s discretion to reject Z&F’s motors unless
    HDR acted fraudulently in doing so.
    Because we agree with the district court that Z&F met its obligation to Rice
    Lake to “furnish as submitted” under Rice Lake’s instructions regarding these
    motors, we affirm.
    I. Background Facts and Proceedings
    Construction Project.      Flooding in 2008 damaged equipment at the
    Cedar Rapids Water Pollution Control Facility (the facility). The city hired HDR
    as the design engineer for its seven-year permanent improvement plan for the
    facility. Permanent repairs package 3 (the project) was a final phase in the city’s
    1
    On this project, Z&F supplied motors of varying horsepower to Rice Lake. The four
    motors at issue had 300 horsepower output. For simplicity and because the issues only
    concern the 300 horsepower motors, we will refer to the four 300 horsepower motors as
    “the motors” or “Z&F’s motors.”
    3
    plan.    Michael Butterfield served as HDR’s principal engineer and project
    manager.     Butterfield stamped and sealed engineering documents prepared
    under his supervision, indicating the documents were “prepared accurately and
    appropriately for the design conditions.” Butterfield provided his seal of approval
    on the project’s plans and specifications.
    The city has general conditions for all of its construction projects. These
    general conditions are “a variant of the engineering contract documents” and are
    included in the city’s contract with its general contractors. Butterfield explained
    the city “has a much better working knowledge” of the general conditions but
    HDR knows the documents “very well.”
    Z&F, an Iowa company with nine employees, is a manufacturer’s
    representative and distributor of equipment for waste water treatment plants.
    Andrew Larson, an experienced salesperson, prepared proposals and secured
    subsequent orders.        Larson’s May 2012 memorandum told all potential
    contractors for the project that Z&F intended to submit a proposal to supply
    equipment, including the motors at issue.
    Before Larson submitted Z&F’s quotation or proposal, he reviewed HDR’s
    plans and specifications, which set out very specific requirements for the motors.
    Butterfield explained the specifications, through the use of tasks and key notes,
    set out the “key design parameters” of the motors—horsepower, volts, rpm, and
    phases.2 Larson agreed, stating the specifications “identify the parameters [Z&F
    2
    At trial, the parties entered joint exhibits into evidence. The applicable specification
    stated: “Remove existing flood-damaged motors and replace with new. Disconnects at
    pumps. Have already been replaced. Total of four pumps; each motor 300 HP, 460
    Volt, 3 Phases, 585 rpm.”
    4
    needed] to compare to the pump requirements” and “taken together, are
    necessary for Z&F to make the proper selection of a motor in its quotation.”
    Larson understood the plans and specifications’ intent was for Z&F’s motors to
    be compatible with the pumps.
    Z&F did not have amperage requirements for its motors when providing its
    quotation, even though HDR had specified amperage for other equipment.3
    Neither did the bid documents tell Z&F to “replace in kind” or to “replace with
    compatible motor,” which, similarly, HDR specified for other equipment. Larson
    understood the plans and specifications for the new motors “weren’t asking us to
    duplicate” the existing motors, and he created Z&F’s quotation based on HDR’s
    plans and specifications.
    On May 30, 2012, Larson submitted Z&F’s quotation to all contractors,
    bidding to supply more than $1 million in equipment, including the motors. Z&F’s
    scope of work was limited to “furnishing” the equipment. The parties agree Z&F
    is a “supplier,” one who furnishes “materials or equipment to be incorporated in
    the Work by Contractor or any Subcontractor.”
    The city hired Rice Lake, a Minnesota company, to be the general
    contractor for the project. On July 16, 2012, Paul Kujak, the project manager for
    Rice Lake, accepted Z&F’s May 30 quotation by issuing a purchase order to
    Z&F. The parties agree the purchase order created a contract4 for Z&F to supply
    the motors. Rice Lake planned to work with its electrical subcontractor to install
    the motors after delivery. Rice Lake’s purchase order stated:
    3
    The issue here is the full load amperage, or FLA, of Z&F’s motors. To simplify the
    opinion, we refer to FLA as amperage.
    4
    References to “purchase order” and “supply contract” are interchangeable.
    5
    Larson then contacted Fairbanks, the pump manufacturer, to help
    coordinate Z&F’s ultimate purchase through Fairbanks from U.S. Motors. The
    next month, August 2012, Larson went to the facility to gather additional
    information for the shop drawings, which are “submittals or technical data.” The
    shop drawings would be drafted by U.S. Motors and transmitted through Z&F to
    Rice Lake for the general contractor’s approval.5 Larson took a picture of the
    nameplate on the existing motors, which provided technical data, including the
    amperage of the damaged motors.
    Z&F submitted its first set of shop drawings to Rice Lake, and these
    drawings set out amperage for its proposed motors. Rice Lake reviewed and
    approved the shop drawings without changes and forwarded them to HDR with
    5
    Shop drawings are defined in the prime contract as “[a]ll drawings, diagrams,
    illustrations, schedules, and other data or information that are specifically prepared or
    assembled by or for Contractor and submitted by Contractor to illustrate some portion of
    the Work.”
    6
    Rice Lake’s transmittal letter.6 After its review, HDR rejected the first set of
    drawings on September 26, 2012, instructing Rice Lake to tell Z&F to revise and
    resubmit the drawings in line with HDR’s six detailed comments.                  HDR’s
    comments did not call out amperage for the four motors and did not comment on
    the amperage Z&F specified.
    The “engineer review” section of the city’s general conditions states the
    engineer’s “review and approval” of shop drawings “will be only to determine if
    the items covered by the submittals will, after installation or incorporation in the
    Work, conform” to the contract “and be compatible with the design concept of the
    completed Project as a functioning whole.” The engineer’s approval does not
    encompass the “means, methods, techniques, sequences, or procedures of
    construction (except where [such] is specifically and expressly” called for in the
    contract). Additionally, the engineer’s approval “shall not relieve” the contractor
    from its “responsibility for any variation from” the contract requirements unless
    the contractor has called the engineer’s attention in writing “to each such
    variation” at the time the contractor submits shop drawings. Butterfield testified
    Rice Lake did not approach HDR with a change order for Z&F’s motors.
    The “resubmittal procedures” in the city’s general conditions state the
    contractor “shall make corrections required by” the engineer to the shop drawings
    and “shall return” them for another review by the engineer. The contractor “shall”
    in writing “direct specific attention” to any “revisions other than” the engineer’s
    prior corrections on a previous submittal.
    6
    HDR set out rules for a contractors’ stamping of submittals, stating, “[a]ll submittals
    must be from Contractor” and “[s]ubmittals will not be received from or returned to
    subcontractors.”
    7
    On November 9, 2012, Larson responded to Kujak about HDR’s
    comments concerning motor speed, cooling capacity, thermostats, rotation, and
    bearings, and on November 30, Z&F submitted its second set of shop drawings
    to Rice Lake. Kujak approved Z&F’s second set of shop drawings the same day,
    stamping Rice Lake had “satisfied Contractor’s Obligations” as “to Contractor’s
    review and approval as stipulated under General Conditions.”             The general
    conditions state Rice Lake is solely responsible for coordinating the work of its
    subcontractors and suppliers and Rice Lake’s obligations “shall include data
    which    is   ‘complete   with   respect   to   quantitates,   dimensions,   specified
    performance and design criteria, materials, and similar data.” (Emphasis added.)
    Butterfield explained Rice Lake “had an obligation to verify all of those things
    under the specifications,” and “the shop drawing does not relieve the contractor
    of meeting the intent of the contract documents.” (Emphasis added.)
    After giving its approval, Rice Lake forwarded the second set of shop
    drawings to HDR for its review. On December 5, 2012, HDR sent a directive to
    Rice Lake telling Kujak to instruct Z&F to “furnish as submitted.”             HDR’s
    comments on Z&F’s second submittal included comments on other equipment
    Z&F was supplying, but HDR did not make any comments about the four motors.
    When Butterfield approves shop drawings, he looks for “general
    conformance with the design and intent with the specs and drawings” and his
    approval states either “furnish as submitted, furnish as noted, or revise and
    resubmit.” But according to Butterfield, HDR’s instruction to Rice Lake to “furnish
    as submitted” is not “the equivalent of [a] get-out-of jail card if the contractor does
    not follow the plans and specs.” (Emphasis added.) Larson testified Z&F relies
    8
    on the engineer stamping as verification “the engineer has validated the plans in
    conformance with our specifications.” According to Rice Lake, shop drawings
    are another way to document communications and can supplement the contract
    documents.    After Z&F was told to “furnish as submitted,” it instructed U.S.
    Motors to manufacture the motors.
    On April 1, 2013, Kujak retired and Mark Hinsz became the project
    manager for Rice Lake. Later in April, Z&F delivered the motors to the project
    site and invoiced Rice Lake. Rice Lake was not ready to install the four motors
    at the time of delivery but would work with its electrical contractor to install the
    motors. Z&F was not responsible for installation.
    Amperage and Existing Wiring. In the early summer of 2013, a city
    worker notified Butterfield the amperage on Z&F’s motors exceeded the
    amperage of the damaged motors.         On June 18, 2013, Hinsz emailed Z&F,
    stating the motors had been approved with 475 amperage, the motors as
    delivered had 452 amperage, and an issue has arisen because the existing
    wiring was undersized for the motor’s amperage.
    At trial, Butterfield admitted (1) the existing motors’ nameplates stated
    their material characteristics and terms; (2) HDR included material terms in
    “some, not all” of its specifications; (3) as to the motors at issue, he could have—
    but did not—make a field inspection, take a picture of the existing motors’
    nameplates, and plug the nameplate terms into HDR’s specifications for the new
    motors; and (4) he did not know why amperage was not listed in HDR’s
    specifications for Z&F’s motors. Butterfield explained HDR’s “design intent” was
    for “in kind replacement” by Z&F’s motors so the new motors would operate
    9
    “under the same design conditions the original motors did.”        But Butterfield
    admitted, although HDR had specified “in kind” other places, it “obviously” had
    missed specifying “in kind” equipment “in some other places” and such language
    “probably should have been put in” HDR’s specifications for Z&F’s motors.
    After communications about making Z&F’s motors work for the project, on
    July 31, 2013, Rice Lake sent a letter to the city outlining six different options,
    including using Z&F’s motors with capacitors or Rice Lake “providing brand new
    motors.” In response, Butterfield e-mailed project manager Hinsz on August 9,
    2013, copying city officials: “[T]he City and HDR have reviewed and discussed
    Rice Lake's proposals. As previously discussed, the intent of the design was for
    the replacement motors to meet the design conditions of the original motors; new
    capacitors are not acceptable due to future projects.” Butterfield instructed Rice
    Lake to either develop modifications to the Z&F motors “such that the motors
    meet the design conditions of the original motors” or provide new motors.
    Hinsz testified Butterfield had not previously discussed design intent with
    him, and Hinsz did not know whether Butterfield had discussed design intent with
    Kujak. In fact, Hinsz did not know what Butterfield meant by “design conditions.”
    Larson testified he did not usually associate design conditions with motors.
    Ultimately, the city required Rice Lake to provide new motors. According
    to Hinsz, Z&F’s motors were rejected by the owner and the engineer because
    they did not meet the “general intent” of the prime contract.
    Due to the complexity of obtaining replacement motors that would meet
    all necessary requirements, Rice Lake did not issue a purchase order to a
    different supplier, Hupp Electric, until April 2014—more than a year after Z&F
    10
    furnished and delivered its motors. Before issuing this purchase order, Rice
    Lake provided Hupp with the amperage of the existing motors and advised Hupp
    the motors’ amperage had to be compatible with the existing wiring. Neither
    Rice Lake nor HDR had told Z&F that information before Z&F delivered its
    motors. Hupp’s purchase order also contained new language requiring Hupp to
    “furnish in accordance with approved submittals.”
    Like Z&F, Hupp used U.S. Motors to manufacture its replacement motors.
    Rice Lake paid Hupp $204,000 and installed Hupp’s motors in 2014. The Z&F
    motors remain in storage, and Rice Lake refused to pay Z&F’s invoice.
    Litigation. On February 18, 2014, Z&F sued Rice Lake for breach of
    contract, alleging it had “relied on Rice Lake’s verification” the four motors
    “should be furnished as submitted.” Rice Lake filed a counterclaim, asserting it
    was Z&F’s obligation to make sure its motors conformed to the plans and
    specifications and “would work with the existing wiring” because “the general
    intent of the plans and specifications was that the new equipment would function
    within the existing systems.”
    The district court heard the parties’ claims in a two-day bench trial
    commencing on August 10, 2015. Hinsz explained “the intent of the submittal
    review is to identify deviations, so that kind of goes hand in hand with the
    submittal and the shop drawing review.” In his deposition, Hinsz stated he could
    not point to any specific project requirement or provision from which Z&F’s
    motors deviated.     But after his deposition, Hinsz reviewed the contract
    documents and concluded Z&F’s motors deviated from general conditions
    11
    section 6.03B as the motors were not “operable” motors for the existing system.7
    By “existing system,” Hinsz meant “a motor is just one component of the pump,
    the piping, the electrical, the system.” Hinsz testified Z&F “should not have
    furnished as submitted as directed by Rice Lake” because Rice Lake “needed a
    motor that worked” with the system. (Emphasis added.) Hinsz opined that the
    “all general conditions” language in the supply contract meant whatever
    obligations Rice Lake had to the city with regard to Z&F’s portion of the project,
    Z&F similarly owed to Rice Lake if Z&F “had actions that contributed to that
    issue.” Hinsz testified:
    Q. Was it Z&F’s responsibility to provide motors that would
    work with the existing system no matter the manner in which those
    components in the existing system changed? A. I guess it depends
    . . . I can only say . . . the plans and specs govern. Now, if there
    was a manner of them changing outside of [Rice Lake’s] control
    and the contract documents, then I wouldn’t have expected Z&F to
    coordinate that . . . . I can only go by the rules of the plans and
    specs . . . .
    Q. And if there is something specific in the plan or specific
    within the scope of Z&F's work, they should comply with that? A.
    Yes.
    Butterfield explained HDR had a contract with the city, not with Rice Lake
    or Z&F, and “all of the descriptions and plans and specifications are to Rice
    Lake.” He testified it was incumbent on Rice Lake to have its own contract with
    its suppliers. Although Butterfield admitted Z&F’s motors satisfied the plans and
    specifications, he nevertheless asserted the “design intent” for those motors was
    to “operate the pumps under the same design conditions that the original motors
    7
    Article six of the general conditions details contractor’s responsibilities and section
    6.03B states suppliers “implicitly warrant” their products “are suitable and fit for the
    intended use” and “shall be free from defect in material, workmanship or design, such
    warranty to run to the benefit of Owner and Engineer.”
    12
    did.” After Butterfield testified the city and HDR rejected Z&F’s motors for not
    meeting the project’s “design intent,” the following exchange occurred:
    THE COURT: . . . Where do I look to see this intent of the
    design?
    BUTTERFIELD: Best I can say is that the intent of the
    design was inherent to—was inherent within the contract
    documents . . . . [We are] grabbing any information that we can to
    put on the drawings . . . . Not all of the information . . . got into the
    drawings . . . . [T]he vast majority of it was replacement in kind.
    THE COURT: But so wouldn’t the simple thing be to just
    include those simple words, intent is replacement in kind?
    BUTTERFIELD: Yes.
    THE COURT: . . . [I]s there something in [the exhibits] that I
    can look to see that?
    BUTTERFIELD: I don’t think those words were included for
    these motors. It was certainly included for a number of other items.
    The district court found the Z&F motors delivered to Rice Lake met the
    general contractor’s instruction to “furnish as submitted.”       The court entered
    judgment for Z&F in the amount of $145,590, plus interest, noting the issue
    would have been resolved easily had the contract documents included “the
    clarifying language that Rice Lake asks the Court to read into the contract
    documents” but “the duty to spell out or discern such matters was not the
    responsibility of the [s]upplier, Z&F.”
    Rice Lake now appeals.
    II. Scope and Standards of Review
    This contract action was tried at law to the district court, and our review is
    for correction of errors at law. See Iowa Fuel & Minerals, Inc. v. Iowa State Bd.
    of Regents, 
    471 N.W.2d 859
    , 862 (Iowa 1991). We are bound by the district
    court’s findings of fact where they are supported by substantial evidence. 
    Id.
     But
    13
    we are not bound by the court’s “application of legal principles or its conclusions
    at law.” 
    Id.
    Contract interpretation is the process for determining the meaning of the
    words used by the parties to a contract. Pillsbury Co. v. Wells Dairy, Inc., 
    752 N.W.2d 430
    , 435 (Iowa 2008). “Interpretation of a contract is a legal issue unless
    the interpretation of the contract depends on extrinsic evidence.”                      
    Id.
    Construction of a contract, the court’s process of determining the words’ legal
    effect, is always a legal question. 
    Id.
    III. Analysis
    Rice Lake contests the district court’s judgment in favor of Z&F, asserting
    supplier Z&F should bear the cost of its motors’ incompatibility with the design
    intent of the motors’ amperage coordinating with the existing wiring. In doing so,
    Rice Lake poses three cascading questions. First, did “Rice Lake and Z&F agree
    HDR had broad authority to interpret the [supply contract’s]8 requirements and to
    approve or reject materials and equipment furnished on the project?” Second, “if
    Rice Lake and Z&F so agreed, was HDR’s interpretation of the [supply contract’s]
    requirements and rejection of Z&F’s . . . motors conclusive and binding?” Third,
    if HDR’s rejection was binding, did Z&F breach the supply contract by not
    replacing its noncompliant motors?
    8
    The brackets replace “subcontract” with “supply contract.” In the general conditions, a
    “subcontractor” is one “having a direct Contract with Contractor or with any other
    Subcontractor for the performance of a part of the Work at the Site.” (Emphasis added.)
    Z&F delivered the motors to the site but did not even unload them. Therefore, even
    though Rice Lake’s brief consistently calls its contract with Z&F a subcontract, a supplier
    differs from a subcontractor. Under the definition of supplier, the contract between Rice
    Lake and Z&F is a supply contract.
    14
    In response, Z&F emphasizes its limited role as a supplier and the fact it
    had no contractual relationship with either HDR or the city. Z&F disputes the
    notion that HDR, as design engineer, exercised any authority over the process by
    which Rice Lake approved Z&F’s motors for delivery to the project site.
    A cardinal principle of contract construction is “the parties’ intent controls,”
    here, the intent of Z&F and Rice Lake in the supply contract. See 
    id.
     But Rice
    Lake’s focus on HDR’s alleged authority to interpret the parties’ supply contract
    tends to blur the existence of multiple contracts. We start our analysis with a
    discussion of Rice Lake’s obligations under the prime contract.
    Butterfield testified contractor Rice Lake “had an obligation to make the
    motors work with the pumps” and the city’s “ultimate decision was to ask for
    replacement motors” from Rice Lake under the prime contract. He also testified:
    (1) the general conditions require contractors, subcontractors, and suppliers “to
    include” in their “scope of work, things that may not be explicitly stated [in the
    plans and specifications] but can be reasonably inferred from what is stated”;
    (2) if HDR’s plans and specifications, although imperfect, would lead a
    reasonable person to conclude that what needs to be supplied is a “plug and
    play” motor, then that is what has to be provided to the city; and (3) the city had
    the contractual right to insist Rice Lake replace Z&F’s motors, which would need
    modifications and did not “meet the design intent,” with “plug and play” motors
    that “would meet the intent of the design.”9
    9
    The prime contract between Rice Lake and the city states:
    It is the intent of the Contract Documents to describe a functionally
    complete Project (or part thereof) to be constructed in accordance with
    the Contract Documents. Any . . . documentation . . . or equipment that
    15
    Rice Lake admits the prime contract required that it replace the motors at
    no cost to the city.     A factor leading to that consequence was Rice Lake’s
    failure—as the general contractor obliged under the prime contract to coordinate
    the work of its suppliers and electrical subcontractors—to ensure that Z&F
    matched the motors’ amperage to the existing wiring in fulfillment of the
    engineer’s “design intent.” The question is whether Rice Lake, who claims it
    relied on Z&F’s expertise, can pass the costs of its own obligation under the
    prime contract down to its supplier.
    The duties imposed on suppliers by the general conditions in the prime
    contract were addressed by several witnesses.             Larson testified the general
    conditions do not state Z&F, as a supplier for Rice Lake, “owes the owner the
    same duties that Rice Lake owes the owner” with regard to equipment supplied
    by Z&F. Butterfield acknowledged, under the general conditions, Z&F has to do
    “what [a] supplier is supposed to do in the contract documents,” and it doesn’t
    “step into Rice Lake’s shoes and all of a sudden become responsible for
    coordinating with any electrical contractors.” But Butterfield opined Z&F did step
    into Rice Lake’s shoes as to supplying motors. Hinsz testified the “electrical”
    section in the prime contract is not in Z&F’s “scope of supply.”
    On appeal, Rice Lake claims the parties agreed in the supply contract “to
    give broad discretion to the [c]ity and HDR to judge the acceptability of Z&F’s
    work and reject that work in good faith if certain conditions were not met.” Rice
    may reasonably be inferred from the Contract Documents or from
    prevailing custom or trade usage as being required to produce the
    intended result will be provided whether or not specifically called for at no
    additional cost to Owner.
    16
    Lake contends, under Iowa law, HDR’s “discretion is binding absent fraud, bad
    faith, or failure to exercise ordinary care.”
    The record does not support Rice Lake’s contention. Butterfield did not
    offer an opinion as to which party under the supply contract, Rice Lake or Z&F,
    was contractually obligated to shoulder the responsibility for the replacement
    motors. And the general conditions expressly limit the interactions between Z&F
    as the supplier and both engineer-HDR and owner-city.               First, the general
    conditions require suppliers to communicate with the engineer through Rice
    Lake. Second, they provide that nothing in the prime contract shall create a
    contractual relationship between the owner or engineer and the supplier, “nor
    shall it create any obligation on the part of [the owner or engineer] to pay or to
    see to the payment of any moneys due any such” supplier. Thus, the prime
    contract specifically removes both the owner and the engineer from Rice Lake-
    Z&F payment disputes.
    Additionally, the prime contract specifically requires Rice Lake to step in
    the shoes of its supplier: “Contractor shall be fully responsible to Owner and
    Engineer for all acts and omissions of the [Suppliers furnishing] any of the Work
    just as Contractor is responsible for Contractor's own acts and omissions.” Rice
    Lake cites no similar contract provision, in either the prime contract or the supply
    contract, stating Z&F “shall be fully responsible” to Rice Lake by undertaking
    Rice Lake’s obligations to coordinate work as the project’s general contractor.10
    10
    In support of its position Z&F is responsible for Rice Lake’s obligations, Rice Lake
    quotes Central Iowa Grading, Inc. v. UDE Corp., 
    392 N.W.2d 857
    , 860 (Iowa 1986), a
    case in equity involving statutory mechanic’s liens, which broadly states: “The principal
    contractor is, of course, bound by the terms of his contract with the owner. In the
    17
    Rice Lake relies on Peter Kiewit Sons’ Co. v. Iowa Southern Utilities Co.,
    
    355 F. Supp. 376
    , 393 (S.D. Iowa 1973), for the proposition, when parties to a
    construction contract “agree to abide by discretionary decisions of the project
    engineer, the terms of the contract will be given full force and effect and the
    parties will be bound by the decision of the engineer.”                 But Kiewit is
    distinguishable; the question involved a general contractor’s ability to enforce
    against the owner a contract term in the contractor-owner prime contract
    regarding the engineer’s discretionary authority as between the general
    contractor and the owner. In fact, the similar terms in Rice Lake’s prime contract
    absence of statutory modification, subcontractors are also bound by the terms of the
    contract between the owner and the principal contractor.” The instant case differs from
    the situation in Central Iowa Grading. First, the issues before us are not grounded in a
    mechanic’s lien suit in equity and do not involve a subcontractor’s contract with its
    general contractor. Second, of the nine cases citing Central Iowa Grading, three involve
    the same bankruptcy proceedings and the effect of change orders. See In re Cent.
    States Mech., Inc. v. Agra Indus. Inc., No. 09-12542, 
    2011 WL 1637991
    , at *34-35
    (Bankr. D. Kan. Apr. 29, 2011) (discussing change orders in Iowa project involving
    subcontractor), aff’d, No. 11-1129, 
    2012 WL 3896940
    , at *13 (D. Kan. Sept. 7, 2012)
    (stating Iowa law allows waiver of requirement change orders be written), aff’d, 556 F.
    App’x 762, 770 (10th Cir. May 21, 2014) (same). One case citing Central Iowa Grading
    involves West Virginia law. See Pasquale v. Ohio Power Co., 
    413 S.E.2d 156
     (W. Va.
    1991) (discussing change orders in context of wrongful death action). The other five
    cases cite to Central Iowa Grading’s analysis of a waiver of change orders and/or
    involve statutory mechanic’s liens. See Ead Control Sys. LLC v. Besser Co. USA, No.
    C11-4029, 
    2012 WL 2357572
    , at *6 (N.D. Iowa June 19, 2012) (discussing change
    orders in the context of subcontractor’s extra work and unjust enrichment claim); Carson
    v. Roediger, 
    513 N.W.2d 713
    , 716 (Iowa 1994) (resolving subcontractor’s action against
    homeowners to foreclose mechanic’s lien and recognizing “mechanic's lien is purely
    statutory in nature”); Eherenman v. Warren, No. 13-1764, 
    2014 WL 7343386
    , at *2 (Iowa
    Ct. App. Dec. 24. 2014) (discussing change orders in the context of mechanic’s liens);
    Palmer v. Glasbrenner, No. 03-0492, 
    2004 WL 1159736
    , at *3 (Iowa Ct. App. May 26,
    2004) (discussing change orders and subcontractor’s extra work in context of
    mechanic’s lien); Booth v. Pilot Corp., No. 99-0925, 
    2001 WL 726364
    , at *6 (Iowa Ct.
    App. June 29, 2001) (resolving mechanic’s lien dispute as to change orders and extra
    work). These cases show Central Iowa Grading is distinguishable. No Iowa court has
    applied the broad proposition Rice Lake cites in a similar contract analysis.
    18
    with the city11 enabled the city to enforce against its general contractor, without
    dispute by Rice Lake, the city’s decision Z&F’s motors did not meet the implied
    “design intent” of the prime contract.
    Here we are faced with a much different question—does Z&F’s supply
    contract with Rice Lake allow the general contractor to saddle its supplier with
    the consequences of the city’s decision—made under its prime contract with Rice
    Lake—to reject the motors previously approved by Rice Lake and HDR? The
    purchase order did not reveal any agreement by Z&F that HDR had the authority
    to decide whether Z&F—as opposed to Rice Lake—was the party responsible for
    ensuring the motors complied with the implied “design intent”—even after Rice
    Lake had instructed Z&F to furnish as submitted and Z&F complied. See, e.g.,
    Granette Prods. Co. v. Arthur H. Neumann & Co., 
    203 N.W. 935
    , 937-38 (Iowa
    1925) (finding initially, plaintiff was a subcontractor not a “mere seller,” and then
    concluding where (unlike here) the subcontract “expressly provided [plaintiff’s
    work] was to be subject to the approval of the architects,” the district court erred
    in striking general contractor’s answer alleging this language “meant” architect’s
    “approval in accordance with the principal contract”).12
    The purchase order obligated Z&F to “furnish and deliver in accordance
    with plans and specifications as prepared by HDR Engineering, Inc. for the
    11
    Making no reference to suppliers or subcontractors, section 9.06 states the engineer
    can “disapprove or reject” work the engineer “believes to be defective, or . . . believes
    will not produce a completed Project” conforming to the prime contract “or that will
    prejudice the Integrity of the design concept of the completed Project as a functioning
    whole” under the prime contract.
    Making no reference to suppliers or subcontractors, section 9.09 states:
    “Engineer will be the initial interpreter of the requirements of the [prime contract] and
    judge of the acceptability of the work thereunder.”
    12
    The subcontract expressly stated: “All of the [subcontractor’s] work to be subject to the
    approval of the [architects].” Granette Prods., 
    203 N.W. at 936
    .
    19
    construction of the City of Cedar Rapids WPCF Permanent Flood Repairs
    Package 3, including Addenda 1 and 2 and all general conditions.” Rice Lake
    reads the reference to “all general conditions” as requiring the supplier to
    shoulder the responsibilities of the general contractor to ensure the motors fit the
    project’s specifications and the implied “design intent” of not exceeding the
    existing motors amperage and of working with the existing wiring. But a glance
    at the table of contents for the “general conditions” in the prime contract shows
    articles detailing the responsibilities of the contractor (Article 6) and the owner
    (Article 9), but no similar article detailing the responsibilities of suppliers. The
    responsibilities listed for contractors under Article 6 are myriad and include
    coordinating work between subcontractors and suppliers. The reference to “all
    general conditions” in the purchase order did not have the sweeping impact on
    Z&F now alleged by Rice Lake.
    We find it significant neither the purchase order nor subsequent directives
    from Rice Lake specified any amperage for the four motors. Larson from Z&F
    explained he was not trying to match any specifications from the damaged
    motors. Rather, he was trying to meet the requirements he had been given in the
    specifications and in HDR’s comments. Butterfield testified HDR’s plans and
    specifications listed the required amperage when it was “critical” to the task, HDR
    should have included the amperage for the motors, and he did not know why it
    was not included along with parameters for horsepower, volts, phases, and rpm.
    Butterfield did not believe Rice Lake advised Z&F “that matching the nameplate”
    amperage was “critical.”
    20
    The rule that express mention of one thing in a class implies the exclusion
    of others applies to contract interpretation. See Peak v. Adams, 
    799 N.W.2d 535
    , 548 (Iowa 2011). Here, after Z&F received detailed specifications about
    horsepower, volts, phases, and rpm and after Z&F provided additional
    information about speed, cooling capacity, thermostats, rotation, and bearings,
    Rice Lake told Z&F to “furnish as submitted.”        Under Iowa law, the express
    mention of those specific and detailed requirements for Z&F’s motors control
    over any implied design intent Rice Lake now asserts Z&F should have
    discerned under the general conditions in the prime contract. See 
    id.
    Further, Z&F twice provided the amperage of its proposed motors in a
    specific and unambiguous manner in the shop drawings and was then told by
    Rice Lake to “furnish as submitted.” See id.; see also Iowa Fuel & Minerals, Inc.,
    
    471 N.W.2d at 863
     (stating where a contract has both “general and specific
    provisions on a particular issue, the specific provisions are controlling”).     Given
    the unambiguous language of the supply contract between Z&F and Rice Lake,
    and given Z&F’s limited scope of work to “furnish” motors, the supply contract did
    not obligate Z&F to go searching for an “implied” design intent under the general
    conditions section of Rice Lake’s contract with the city after Rice Lake told Z&F
    to “furnish as submitted.” Our conclusion is supported by the testimony of Rice
    Lake’s Hinsz:
    Q. If there is a specific intent from the city, that’s incumbent
    on the City to communicate that to their engineer or general
    contractor, isn’t it? A. Correct.
    Q. As general contractor, you want to know what your boss
    or the city’s intent, is don’t you? A. Always.
    Q. And then . . . if it’s not conveyed in documents, it would
    be incumbent on you as general contractor to convey that intent to
    21
    your subcontractor and suppliers, wouldn’t it? A. Yep, clear chain
    of communication.
    Finally, we share the district court’s view that this litigation could have
    been avoided if the specifications for or comments to Z&F’s shop drawings had
    included an amperage level, alleviating the need to read “clarifying language” into
    the contract documents. As the district court insightfully observed, the issues
    arose “largely from the failure of the contractual provisions to specify for Z&F as
    the [s]upplier the equipment particulars that ultimately were required. To the
    extent that a company or party should have foreseen such issues,” that party is
    “not the [s]upplier of the motors, who provided what was specifically called for in
    the contract documents; who followed the procedures for submitting and
    receiving approval of shop drawings; and who delivered the equipment in
    conformity with the obligations set forth in the contract.”
    AFFIRMED.