Western KY. region Federal VHF
169.675 NAC 418 (TVA)
173.5625 NAC 110 (Forest svc)
Recently heard test counts on one and repeated squelch tails on the other.
Without further confirmation, I will assume both to be LBL.
Contractors on the project to replace the lock at the Chickamauga Dam in Chattanooga are using 464.550 MHz, PL 67.0 - simplex.
If you want to listen, PL is recommended. There are other co-channel users nearby.