MIAMI â Miami-Dade Countyâs Unsafe Structures Board is under pressure to speed up the process for reviewing problematic structures following the collapse of the Champlain Towers South a month ago. Before the tower collapsed June 24, the county board already had a backlog of 1,000 unsafe-structure cases, the Miami Herald reported. Now, starting this week, an engineerâs report declaring a building structurally safe is required before an extension can be granted when recertifications are so overdue they have been referred to the unsafe structures board, the newspaper reported. If a building canât get an engineerâs endorsement that quickly, residents would have to be evacuated, Spencer Errickson, supervisor of the countyâs Unsafe Structures division, said at a meeting Wednesday.