These are the signs by my wife's office - it's really hard to visualize but at points in the sidewalk there are grates that you can see through down to the old

These are the signs by my wife's office - it's really hard to visualize but at points in the sidewalk there are grates that you can see through down to the old sidewalk below http://fuzzyco.com/news/archives/uploaded/2005-08-15/vaultedsidewalk.jpg http://fuzzyco.com/news/archives/uploaded/2005-08-15/vaulted...