Proposed Amendment of Class D and E Airspace; Eugene, OR, and Corvallis, OR

This action proposes to amend Class E airspace designated as an extension to a Class D or E surface airspace area, and Class E airspace upward from 700 feet above the surface at Mahlon Sweet Field Airport, Eugene, OR, to accommodate airspace redesign. Class E airspace extending upward from 700 feet above the surface at Mahlon Sweet Field Airport also would be amended to remove reference to the Corvallis Municipal Airport by creating a stand-alone airspace designation for Corvallis Municipal Airport. Additionally, this proposal would update the airport reference points for these airports in Class D and E airspace, as well as remove the Notice to Airmen (NOTAM) requirement noted in Class E surface area airspace. Airspace redesign is necessary for the safety and management of Instrument Flight Rules (IFR) operations within the National Airspace System.