Bay Area Transportation Authority — affirmed exclusion of negotiation evidence but allowed county attorney as witness

Case
Bay Area Transportation Authority v. County of Grand Traverse
Court
Michigan Court of Appeals
Judge
Michael F. Gadola (Rick Snyder, 2014); Michael J. Riordan (Rick Snyder, 2012)
Date Decided
August 7, 2026
Docket No.
374682
Topics
Contract Interpretation, Parol Evidence, Witness Lists, Attorney-Client Privilege
Source
Read the full opinion

Background

Bay Area Transportation Authority entered into an Interlocal Agreement with Grand Traverse and Leelanau Counties after a dispute over the composition of BATA’s board. The agreement provided for a seven-member board, including four members appointed by Grand Traverse County, and stated that each county “shall appoint a County Commissioner” to serve as an ex-officio member. It also contained an integration clause declaring the agreement the complete and exclusive statement of the parties’ agreement.

After Grand Traverse appointed two county commissioners to BATA’s board, BATA sued, alleging breach of contract and seeking alternative equitable remedies. During the litigation, BATA sought to introduce earlier drafts and communications from the negotiations and added county attorney Mattis D. Nordfjord—whose affidavit Grand Traverse had submitted with a summary-disposition motion—to amended witness lists. The circuit court excluded the negotiation evidence under the integration clause and barred Nordfjord from testifying because the witness lists were late, Grand Traverse would allegedly be prejudiced, and attorney-client privilege applied.

The Court’s Holding

The Court of Appeals affirmed the exclusion of evidence concerning the parties’ negotiations and earlier agreement drafts. Because the Interlocal Agreement contained a valid integration clause and BATA did not allege fraud invalidating either that clause or the entire agreement, prior negotiations, representations, proposals, agreements, and communications were inadmissible to contradict or interpret the integrated agreement.

The court reversed the order barring BATA from adding Nordfjord to its witness list. Although BATA’s amended lists were untimely, Grand Traverse did not demonstrate prejudice: Nordfjord was its own attorney, and it had relied on his affidavit in seeking summary disposition. Nordfjord may therefore be called as a witness, but he may not give inadmissible testimony about the prior negotiations and may assert attorney-client privilege when applicable.

Key Takeaways

  • A valid integration clause generally forecloses evidence of prior negotiations and drafts absent fraud invalidating the clause or the entire contract, or a contract obviously incomplete on its face.
  • When deciding whether to permit a late witness-list amendment, the primary considerations are the moving party’s diligence and the prejudice that granting or denying the amendment would cause either side.
  • A party is not ordinarily prejudiced by the late identification of its own attorney as a witness when it previously relied on that attorney’s affidavit in the litigation, though evidentiary rules and attorney-client privilege still limit the testimony.

Why It Matters

The unpublished decision underscores that Michigan courts will enforce integration clauses according to their terms and will not use negotiation history to resolve disputes over the meaning of fully integrated agreements without a recognized basis for avoiding the clause.

It also illustrates that an untimely witness disclosure does not automatically justify exclusion. Trial courts must assess concrete prejudice, particularly when the proposed witness is already known to—and has been affirmatively used by—the objecting party.

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