In September, a federal judge denied Preservation Pittsburgh's request for a court order to stop the demolition, saying he had no legal jurisdiction. But that judge told the city-county Sports & Exhibition Authority to delay demolition by 10 days so the group could petition the 3rd U.S. Circuit Court of Appeals.
The appeals court also refused to block the demolition, though it put off a final decision on the merits of the lawsuit, which argued the 50-year-old building's retractable, igloo-shaped dome made it historically significant.
On Friday, the panel said they couldn't grant the group "meaningful relief because we cannot reconstruct the arena."