The drainage pipe is just where the egg is buried. I thought the TAG was the building in the previous photo. Not that helps much as I dont have a clue as the whereabouts of the building either. A little more verbage might help.
However I wouldnt worry to much about Mr. Egg not moving much just now. The game has wandered about the same general area more than once in the game. I am sure it will grow legs sooner or later.
2005 BMW F650GS
2012 Triumph Tiger 800xc