Proposed Modification of Class D Airspace; Terre Haute, IN; Proposed Establishment of Class E Airspace; Terre Haute, IN

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This document proposes to modify Class D airspace at Terre Haute, IN, and Establish Class E airspace at Terre Haute, IN. A proposal has been made to reduce the operating hours of the Terre Haute Air Traffic Control Tower (HUF ATCT). The effective hours of the Class D airspace for Terre Haute must coincide with the HUF ATCT's hours of operation. Class E airspace extending upward from the surface is also required to protect aircraft executing Instrument Approach Procedures when the HUF ATCT is closed. This action would modify the effective time of the existing area of Class D airspace, and establish a radius of Class E airspace for Terre Haute International-Hulman Field Airport.