corps of engineers

Does anybody know what frequency(s) are used by the Army Corps of Engineers, at the Demopolis Alabama Project Office or by any of the facilities in the Black Warrior & Tombigbee Riverway System ? If so, are they still Analog, or have they converted to digital already? I know that some Corps...

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.