Why are there buildings on the runway?

 

 

http://maps.google.com/maps?t=h&q=46.783333,-56.2&ie=UTF8&ll=46.773701,-56.168289&spn=0.010037,0.018518&z=16 

 

 

 because there's a new airport to the south, with a longer runway!

http://maps.google.com/maps?t=h&q=46.783333,-56.2&ie=UTF8&ll=46.763413,-56.175413&spn=0.020666,0.038581&z=15&iwloc=lyrftr:h,10017745284963159711,46.763119,-56.174212