Opinion by
Aetna Insurance Company appeals the district court order adding interest and costs to the arbitration award in favor of William Foust. We reverse.
Foust claimed benefits under the uninsured motorist provisions of his insurance policy with Aetna. The claim, together with Foust’s contention that under the policy he was entitled to prejudgment interest upon the award and costs, was submitted to arbitration. An award was made in favor of Foust, but his request for interest and costs was denied.
The arbitrator determined that the right to interest and costs was a substantive right created by statute, in particular, § 13-16-104 and § 13-21-101(1), C.R.S. (1987 Repl.Vol. 6A). Accordingly, he determined that since interest and costs were not specifically provided for in the insurance policy, they were not recoverable. Foust successfully petitioned the district court for the addition of interest and costs to the arbitration award. This appeal followed.
Aetna contends that the district court erred in modifying the arbitration award since no statutory grounds existed therefor. We agree.
An arbitration award is binding upon the parties,
Judd Construction Co. v. Evans Joint Venture,
Here, Foust sought correction under § 13-22-215(l)(a), which provides that the court shall modify or correct the award if:
"There was an evident miscalculation of figures or an evident mistake in the description of any person, thing, or property referred to in the award.”
An “evident miscalculation of figures” refers only to “mathematical errors committed by arbitrators which would be patently clear to a reviewing court.”
Morrison-Knudsen Co. v. Makahuena Corp.,
We are aware of this court’s decision in
Atencio v. Mid-Century Insurance Co.,
Significantly, under the provisions of C.R.C.P. 109, a “mistake” of the arbitrator which permits a modification must be “so gross as to evidence that the award did not actually represent the arbitrator’s intent.”
See Granite State Insurance Co. v. Dundas,
In the instant case, the court’s modification of the award is diametrically opposed to the intent of the arbitrator. Here, it was the intent of the arbitrator specifically to deny interest and costs upon his interpretation of the contract terms and his award clearly represented this intent. Therefore, the trial court erred in modifying the arbitration award.
The order of the trial court is reversed.
