Bohinj Railway

The Bohinj railway enters the Idrijca Valley in Bača pri Modreju. Immediately behind the exit of the Bača tunnel, the train drives the train to 258 (207.1?) meter -long Viaduct Idrijca, which is the longest viaduct on the entire railway track. In this part, the railway from the direction to the south diverts to the west and leads to the railway station of Sv. Lucija (Most na Soči), which is the main station for places along the upper flow of Soča.
The viaduct begins with a stone part with seven arches, followed by a 51 -meter -long iron part, which is based on a stone pillar and is completed by another stone arch. On both sides of the viaduct, a fortress was built at the time of construction, which testifies to an important military function that the Bohinj railway had.

There are 28 tunnels on the Jesenice-Nova Gorica railway with a total length of 16.1 km and 5 galleries with a total length of 565 m. The line crosses the Sava Dolinka, Radovna River, three times Sava Bohinjka River, eleven times Bača river, Idrijca River (207.1 meters long viaduct near Bača pri Modreju) and twice the Soca River (Isonzo River).
Considering the bridges across the streams, ravines and bays from Jesenice to Nova Gorica there are 65 bridges. To illustrate how demanding this mountain rail is, it is enough to look at the section between the stations Hudajužna and Grahovo. On this 6.54 km long section are 4 tunnels totaling 1390 m, 8 bridges with a total length of 400.46 m, 33 perishes and 15 curves with radio, less than 300 m; All this in a fall from 20 to 2525.8 Promila. Only on a 798 m long section per kilometer "42", the track crosses Bačo four times, twice the road, breaks through two shorter tunnels, and the concentration of structures increases another 5 permits and a ventilation device for the Bukovo tunnel and the guard.
The valley along which the railway line, the road and the Bača River is broken, is narrow; Above it, a 1303 m high rises from one side, on the other, a 1070 m high useful mountain.

With the outbreak of the First World War on the Isonzo Front, the Bohinj railway (Wocheinerbahn) line was completely claimed by the K.u.K (kaiserlich und königlich: imperial and royal) military. This railway lifeline was now used to supply the entire Tolmin bridgehead and the adjacent sections of the front. The route was mostly single-track and the transport of the necessary war material did not leave the railroad workers a minute of rest or free capacity. South of the railway bridge at Bača pri Modreju was the railway line in the Italian firing range and was later in the war even interrupted and cut off by the course of the front. As a result, rail transports have already been used for a number of years. Stops unloaded in advance in Hadajužna railway station. The railway station of Most na Soci (then St. Lucia) was destroyed by Italian artillery shells.

On 18th July 1915 Archduke Karl, later Emperor Karl visited the area. The Archduke's heir to the throne visited together with the Archduke Frederick the troops in the Tolmin bridgehead. On this occasion, the Baon had lined up on the large meadow in front of the railway bridge and the future emperor walked his men and distributed awards. The same motif was to be repeated many times in the following years during visits by the commanders. Finally, the German troops of the 14th Army marched under the Bridge through to replace the positions in the bridgehead. From there, in October 1917, the final breakthrough on the Isonzo began.

Sources:

Tiri in čas, K. Rustja, Železniško gospodarstvo Ljubljana, 1990, str 29.;

Avstrijski cesar Karl (1887-1922), URL: vatican.va, citirano 5. junij 2023;

Po sledeh Soške fronte, M. Simić, MK, 1998, str: 231.