Historical background and composition

The works that made up the Ugovizza-Forcella Nebria barrier were reactivated by the Alpine Wall barrier of Malborghetto-Valbruna. The latter, built between 1938 and 1942, was divided into four groups of works: Malborghetto, Quota 845, Nebria and Valbruna. During the reactivations of the early 1950s, due to the new defence requirements against the Warsaw Pact troops, it was divided into two distinct barriers: Malborghetto, which included the group of the same name, and Ugovizza-Forcella Nebria, which included the Quota 845 and Nebria groups (the works of the Valbruna group were not reactivated). Of these two groups, seven works were reactivated, to which structural modifications were made to increase their anti-tank capacity and the now ineffective weaponry was replaced. At the end of the reactivation works, this was their composition:

• work 1: it featured four P positions (for anti-tank guns) and six M positions (for machine guns)
• work 2: it featured two M positions;
• work 3: it featured one P position;
• work 4 (structure that can be visited): this work housed the command post of the barrier and featured two P positions and two M positions;
• work 5: it featured two P positions and two M positions;
• work 2N (Nebria): it featured two P positions and one M position;
• work 3N: it featured one P position and two M positions.

In addition to the works, the anti-tank ditch located between the slopes of Mount Obuas and those of Alpe Limerza was also restored.

In the first half of the 1960s, the barrier was enhanced with the construction of six positions: three anti-tank positions in battle tank turrets installed on a reinforced concrete structure (P12, P13, P14) and three machine-gun positions in metal turrets with four slits (M21, M22, M23). The former turret emplacements consisted of a battle tank turret, removed from American M26 “Pershing” tanks, positioned on a concrete base, under which was a shelter.

The last implementation took place during the 1980s, corresponding to the construction of the A23 motorway and the new railway. The construction of these two routes would have made some of the works and positions of the barrage impossible to use, and at the same time, the need arose to control two new roads the enemy could use for an invasion. Therefore, the construction of new fortifications became necessary. In the end, out of the eight positions that were initially planned, only three were built: two P-posts in a battle tank turret installed on a reinforced concrete structure (P15 and P16) and one M-post in a four-slit turret (M24).

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