Another interesting discovery in the FAA records...
Someone has asked permission to build a 600 foot flagpole, the structures name is "World's tallest flagpole". The location is near 156 outside the TMS gates, so my guess is this is a part of TMS itself.
A crane has also been asked about. The crane an LR-1300, and the dates are 07/24/2015 to 07/23/2016.
The current tallest flagpole is located in Jeddah, Saudi Arabia and stands 561 feet. It has been the tallest since last year.