This is bunker CSA from the sector Comblain-Sougné from de 1st line of defense for the city of Liège, la Position Fortifiée de Liège (PFL 1).
The bunker is coded with letter A. This refers to the small river Amblève which downstream flows in the river Ourthe.
The bunker is located imbedded along the ridge of a stone moutain along the small river Ourthe. It protected the road and the river.
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