Evidently eons ago those frequencies must have been some type of civil defense channels. There are other jurisdictions that had licenses there until a few years ago such as the City of Baltimore Civil Defense. I remember that our local rescue squad had a 1960's era truck with a 27 MHz antenna on it and I just assumed that they used CB before they got their VHF high band radios but they may have actually been licensed on some frequency above the then 23 channel citizen's band. The reason that they may be keeping those licenses is because they are licensed for more than just 4 watts. The 27.235 frequency is listed here the RR database for Amarillo so it must still be in use. They also have a GMRS frequency listed too. The purpose of these frequencies may be so they can communicate with groups like REACT. In a disaster they could easily put CB radios in a lot of people's hands.
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