A significant historic site requiring historic preservation and restoration of the warehouse walls while installing a below grade parking garage (12 ft below grade) within 1500 ft of the Mississippi River. Foundation blowout was a significant risk to be analyzed and a plan was developed to address those concerns. To de-water might have damaged adjacent structures. The team of designers, estimators, project managers and the owner all worked closely to evaluate the risk and needs to accomplish something not done in New Orleans in 50 years.