We have scoured our files and our sleuthing leads us to believe that these projects currently hold the record. Here, then, are the new entrants to the history book of record breaking projects in the field: The longest concrete bridge is 24 mile long Lake Pontchartrain, Louisiana, Causeway stretching between New Orleans and Madeville. The largest concrete dome is 400 foot diameter folded plate concrete dome roof of the University of Illinois Assemble Hall. The highest concrete building is 650 tall Shell Oil Building in Houston, Texas. The highest concrete chimney is 844 feet high built as part of a power plant in Stratton, Ohio. The longest concrete barrel shell roof is the International Exhibition Facility at New Orleans Trade Center will a 253 foot clear span over the main hall. The highest prestressed concrete building is The Tower apartment building at 308 feet.