crane on the unit block of Adams St NW or W St NW doing something...

See this tweet and pic:
 

Bloomingdame ‏@bloomingdame  5h5 hours ago

Who knows what this green creature does? Seems to have something to do w/ creating a pop up. #bloomingdaledc

2:49 AM - 10 Mar 2015

               

a ‏@trickywoo  5h5 hours ago

@bloomingdame live on the block- it was piping in cement to the back, not sure what for though
 

Bloomingdame ‏@bloomingdame  5h5 hours ago

@trickywoo I never would have guessed that. I thought it might have been lifting something out. Interesting. Thanks.