By the start of the 21st century, the 27-piece map was in desperate need of conservation. In October 2006, the New York City Department of Environmental Protection and the Queens Museum sent the historic display to McKay Lodge Fine Arts Conservation Lab in Oberlin, Ohio, for restoration. Over the next 18 months, conservators and technicians worked on the model full-time, removing over 70 years of accumulated dirt and re-paintings. Clearing away the dirt and debris, they found much of the original geography and painted details to be intact or recoverable. Road maps and satellite images were used to restore lost portions of the model.