Whether the parol-evidence rule barred Sherrodd from relying on the alleged pre-contract representation that the job involved only 25,000 cubic yards of excavation.
Holding
Yes. The written lump-sum subcontract superseded the alleged prior oral representation, so that evidence could not support Sherrodd's fraud or compensation claims.
Reasoning
Montana's parol-evidence statutes provide that a written contract supersedes oral negotiations or stipulations concerning the same subject that preceded or accompanied its execution. Once parties reduce their agreement to writing, the writing ordinarily supplies the exclusive evidence of its terms.
Although fraud may sometimes permit evidence outside a written agreement, the Court applied its precedent limiting that exception when the alleged oral promise directly contradicts an express contractual term. Sherrodd's asserted reliance on a 25,000-cubic-yard estimate conflicted with its written acknowledgment that, through examination, it had satisfied itself about the quantity and character of the work.
The claimed $3.90-per-cubic-yard understanding also conflicted with the written agreement's express lump-sum price, its integration clause merging prior negotiations and agreements, and its provision governing the work as a whole. Because the alleged representation directly concerned and contradicted the written contract's subject matter, the parol-evidence rule excluded it.
Sherrodd briefly invoked mutual mistake on appeal, but it had not advanced that theory in the trial court. The Court therefore declined to consider it under the rule that an appellate court will not review a theory raised for the first time on appeal.