The most visible construction currently going on, and the one I get in my photos all the time, is on a parking garage expansion.
There is a 4th runway that is being built, but it is not parallel to another other ones. I have a new aerial photo of the MSP taken in December 1999 (it's so rare to have the opportunity for aerial photography in Dec at MSP) that I've been meaning to post...I've just been busy lately and I haven't gotten around to doing it. Anyway, the new runway is clearly visible on it.
A noble spirit embiggens the smallest man...