Drachenbronn Air Base
(Base Aérienne 901 Drachenbronn
) of the French Air Force
is located in the community of Drachenbronn-Birlenbach
in the Bas-Rhin département
The base uses the underground facilities of the former Ouvrage Hochwald of the Maginot Line. Its mission is the surveillance of aviation movements in eastern France.
In 1946 the Air Force began studies for the creation of a radar station on top of the ouvrage. Construction began in 1952, and in 1955 major construction was undertaken in the ouvrage for a radar control room and operations center, which was placed in operation in 1957. The operations center was again renovated in 1964, and yet again in 2007.
A three-dimensional radar was installed on the nearby Hochwald mountain, which dominates the Alsace plan and the Rhine valley.