Modification of Class D Airspace and Establishment of Class E Airspace; Klamath Falls, OR

This action modifies Class D surface airspace at Klamath Falls International Airport by amending the effective hours to coincide with the Klamath Falls Airport Traffic Control Tower (ATCT). This action also establishes a Class E surface airspace area when the ATCT 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 E airspace for instrument approach procedures when the tower is closed.