Sugar Grove [1] as well as Yakima [2] have been completely closed. From what I hear Menwith Hill and Misawa have been de-staffed and repurposed. I suspect Pine Gap is still maintained for short term operational projects, but the ECHELON SIGINT program has been effectively shut down. (Rightfully so as its purpose was Satellite intercepts, which have largely given way to fiber optic routes)

1. http://cryptome.org/dodi/2013/opnav-5400-2215.pdf 2. http://cryptome.org/dodi/2013/opnav-5400-2211.pdf