BISMARCK, N.D. (AP) — A contractor who supervised the $52 million upgrade of North Dakota's Heritage Center has won a lawsuit against the State Historical Society.

Wahpeton-based Comstock Construction Inc. alleges in court documents that the state still owed it more than $1.5 million in damages and unpaid bills.

A jury sided with the company on Wednesday after a three-day trial. It is unclear if the state will appeal. Officials did not immediately return telephone calls for comment Wednesday.

Historical Society Director Claudia Berg has said the agency withheld payment to the company because it had not finished some work.

The revamped Heritage Center opened in 2014. State lawmakers approved about $40 million for the 97,000-square-foot expansion in 2009. The Historical Society raised an additional $12 million from private sources.