The pergola was rebuilt by Seidelhuber Iron and Bronze Works based on repaired sections rather than the original documents , at a cost of $ 3.4 million . While the project was originally planned to be finished in time for Christmas , the repair work required more time and was made more complicated by the February 2001 earthquake , which caused the roof of the underground restroom to sink by . The Seidelhuber foundry 's owners financed the project 's performance bond on their own , requiring them to sell their home and wedding rings . Installation of the restored pergola elements began in June 2002 , using only one percent of new material for the exterior furnishings . The new pergola was fitted with a steel skeleton to prevent a future collapse ; the twelve Corinthian columns and sixteen arches were rebuilt using iron from the original structure
February 2001 earthquake
2001 Nisqually earthquake
Pioneer Square pergola