[1] Located on a height to the southwest of Rimplas, the position was originally called Ouvrage de la Madeleine.

While it was a prototype for later work, it is not entirely typical of Maginot fortifications, with large expanses of wall armored with 20 cm steel plate and other sections overlaid with stone masonry.

The underground portion of the ouvrage, containing the ammunition magazines, living quarters, command spaces, generating plant and communication galleries between the combat blocks covers three levels.

Rimplas stands on a prominent height above the Tinée and Valdeblore valleys before their streams join to form the river Var.

[3] The final cost was four times the initial estimate, making Rimplas the second most expensive position (after Monte Grosso) in the Alpine Line.