Sloopin Mailbag - "I See Something, What's That?"

Columbia Building Something at 8th and Wabash
A reader writes:

Construction happening on Columbia's lot at 8th and Wabash. Anybody know what's being built there?

Something being built at Northwest corner of 8th and Wabash

Something Coming to Printer's Row?
A reader writes:

I live in the Transportation Building on 600 S Dearborn. I noticed the 'Space Available' sign was removed from the vacant retail space next to Sofi Italian restaurant. Hopefully something new is coming soon! If I find out any more info, I will let you know!

Something coming to 620 S. Dearborn?

Anyone know anything about this space?

Annoying Noise at 13th and Prairie
A reader writes:

I have lived in the south loop for almost a decade. I love it. However, I have been noticing a constant buzzing in the neighborhood, specifically around 13th and Prairie. It almost sounds like a generator has a broken part. Has anyone brought this up on your blog? I searched, however I did not find anything. I would like to find out where the noise is coming from and see if the noise level can be toned down. I thought I would turn to my trusty neighborhood blog first! 

(Hat tip: MJ, AK, VB, KRM!)