Through the use of an old drawing from 1970 when the mall was originally built, we had a general idea where the utilities would be. We pot-holed areas where we thought the utilities should be to locate them, and then used appropriate best management practices to expose and protect the utility lines as site work progressed. Prior contact with the utility companies was also helpful to finally identify these lines so our workers could proceed on with prepping the site and locating the utility lines before they were damaged by the heavy equipment.