Notice of Proposed Rulemaking

This action proposes to modify the Class E airspace extending upward from 700 feet above the surface at Sonoma County Airport, Napa, CA, by removing an irregular shaped area located approximately 20 miles southwest of Napa County Airport. This airspace area is discontinuous from the airspace surrounding Napa County Airport and is not essential to instrument flight rules (IFR) operation at the airport. This proposal would also update the airport geographic coordinates. This action is necessary for the safety and management of instrument flight rules (IFR) operations at the airport, with the minimum amount of airspace restriction.