Maybe the Best Place to Work Shouldn't Be?

Government Executive has a piece on the 12 best small federal agencies to work at.  Topping the list is:

In 2012, the Office of Navajo and Hopi Indian Relocation topped the very small agency list with a Best Places to Work job satisfaction and commitment score of 90.1 on a scale of 100. Its mission is to assist Hopi and Navajo Indians impacted by the relocation that Congress mandated in 1974 for members of the tribes who were living on each other’s land.

 Now I applaud their accomplishment in being the best place to work in the government.  But the thought does pass through my mind: there's 39 years between the Congressional mandate and now.  While I understand relocating people is a long process, shouldn't it have been finished maybe 10 years ago?