Establishment of Class D Airspace and Modification of Class E Airspace; Bozeman, MT

This action establishes Class D surface airspace and modifies Class E surface airspace at Gallatin Field, Bozeman, MT. The Class D surface area is established to accommodate the procedures associated with the operation of a new Airport Traffic Control Tower (ATCT) at the airport. The modification of the Class E surface area amends the effective hours from continuous to part-time, the effective hours coinciding with the hours that the tower is closed. The effect of this action is to clarify when two-way radio communication with the ATCT is required and to provide adequate Class D airspace for procedures when the tower is open.