The new tower is 190 ft. tall, with a triangular cross-section (visible on new satellite images). It is too tall and too solid for a drill rig. It is located at approximately N 37° 14.782' and W 115° 49.396', west of the sump ponds. This location is near the DYCOMMS and Quick Kill radar sites at the south end of Groom Lake. It may hold a new radar array for RCS tests or other radar measurements.
The tower has line-of-sight to a newly expanded remote facility near N37° 14' 32" and W115° 53' 24". That facility in turn has several tall poles, although not as solid. The remote facility was expanded around the same time our tower was built, so there may be a connection.
The structure looks somewhat similar to the ICECAP tower at the Nevada Test Site, without the siding. See this LVRJ article from December 2000 for more information and some photos. Because of the proximity to the NTS, and the fact that the towers there are no longer used, it may be a re-used tower originally designed for underground nuclear tests. But re-used for what?...
There are also a couple of new structures and tall light poles at the south end of the scraped area in the back. On new satellite photos it looks like a shooting range, located at N 37° 14.6' and W 115° 50.25'.