It's a 100 amp sub panel for a little addition (that includes a 3 car garage). And thanks for the comments! Here is the main panel ($800,000 in additions and renovations and the homeowners (really nice people at least) couldn't spend $3000 more for a 400amp upgrade!!! THAT upsets me!) I wish I had a "before" of the mess of a 100amp panel that was there...
There is also another sub-panel now next to the 200amp main panel.