Here's an interesting license. I've seen this frequency in Police Call, etc. for years but never actually looked at the license info. They have four sites on the same frequency 155.04. Austin, Glen Rose, Matagorda County, and Amarillo (the last three are nuclear sites). I have never heard anything on these freqs, but check out the license notes.
http://www.radioreference.com/modules.php?name=RR&action=fcc&cs=WQCU882
http://www.radioreference.com/modules.php?name=RR&action=fcc&cs=WQCU882