Appellants argue that the district court erred by denying their motion to vacate on grounds that the arbitrator showed evident partiality and exceeded his authority. Minnesota State Patrol Troopers Ass'n v. State, Dep't of Pub. A. Evident partiality. Pirsig v. Pleasant Mound Mut. The party challenging the award must establish facts that create a reasonable impression of partiality.
Appellate courts review de novo whether the conduct challenged constitutes evident partiality.
Appellants have produced no evidence, other than the result obtained, to establish evident partiality. Thus, we need not determine whether the parties reached a new agreement in 1991. B. Arbitrator's authority. A reviewing court will set aside an arbitration award only when the objecting party establishes that the arbitrator has clearly exceeded the powers granted in the arbitration agreement. A reviewing court determines the scope of the arbitrator's authority de novo.