The construction manager for the massive Miami Beach Convention Center redevelopment claims the city owes over $70 million for extra work resulting from the city’s many designs changes.

Clark Construction Group LLC was hired as construction manager in 2015 agreement for the $515 million renovation and expansion project. It includes 500,000 square feet of exhibit walls, meeting rooms and support space plus a 60,000-square-foot ballroom, rooftop parking, and landscaping and road work.