Part of the Newport Research Facility, site Tanner is primarily used to gather antenna pattern and coverage data of airframes. It is associated with site Irish, 1.5 miles away.
The site is shown on the USGS Newport quad as "USAF Newport Test Annex Radio Facility"
Related reading:
http://www.wpafb.af.mil/shared/media/document/AFD-080109-060.pdf
http://www.flcnortheast.org/sept2006_Newport_Tour.html