Hauenstein Railway

The construction of the summit tunnel in 1853 by the Schweizerische Centralbahn (SCB) was a big challenge, because never before had a mountain range been penetrated in Switzerland. Nobody thought it possible that the tunnel could be driven from both sides and meet in the middle after years of work. The English contractor Thomas Brassey decided to drive the tunnel from five points—both ends and from three perpendicular shafts from the surface of the mountain to the axis of the tunnel—in order to accelerate the project.

Tools used were still fairly primitive, such as sledgehammers, chisels, pickaxes, crowbars and drill rods. Horses, men from many countries and many children were working under great danger in the tunnels and had to breathe stifling smoke and dust. The pitfalls and the geology of the complicated structure of the Jura had been underestimated. On the south side from Trimbach the drive made good progress, but on the north side problems accumulated. Although the hard limestone could be pierced, water flooded the tunnel and continually threatened to drown the workers. Since the tunnel dropped slightly from north to south, water had to be collected from the northern section and laboriously pumped by hand out of the tunnel.

On 28 May 1857, a fire spread from a forge at the top of one of the shafts into the tunnel and set alight its lining boards and their supporting beams. Some workers were able to escape before the collapse of the burning rafters. A massive amount of earth fell into the tunnel and cut off 52 workers. Water was poured into the tunnel to put out the fire and an attempt was made to dig a tunnel through the rubble. When the water came into contact the very clayey debris it produced a large amount of toxic carbon monoxide. Nevertheless rescue parties pressed on, but they had to be called off when 11 rescuers died from carbon monoxide poisoning and many others lost consciousness. Attempts were made to improve air circulation, but nothing helped. On the eighth day after the accident they finally broke through. They found all 52 miners dead behind the collapsed section of the tunnel. It seemed that they had died from gas poisoning on the first day after the accident. The accident cost a total of 63 lives.

On 1 May 1858 the large project, the most difficult section of the Schweizerische Centralbahn's network, was opened with a big celebration. The route through Läufelfingen has a grade of 26.3 per thousand, one of the steepest routes of the Schweizerische Centralbahn network. It was the second line in Switzerland to be built with double track. The line needed bank engines to pull freight trains over the pass.

After the construction of the base tunnel the old Hauenstein line lost traffic and in 1938 it was reduced from double to single line. In the late 1990s the line was threatened with closure. In 1997 operations were replaced by buses for a year, but since then regional trains again operate between Sissach and Olten. In 2006 was the "Läufelfingerli" was again seriously threatened by replacement with buses, but this was rejected by the parliament of the canton of Basel-Country on 16 November and funding was secured for rail services (as route S9 of Regio S-Bahn Basel) until 2009. The supporters of replacement of buses pointed out that cost recovery on the line was about 19 percent (against 63 percent in the S3 service on the Hauenstein base tunnel line or 70 to 80 percent for trams in suburbs of Basel in Basel-Country) and that the limited resources available for public transport could be more effectively used for the promotion of rail transport in the more densely populated urban areas, while buses would be more suitable for serving the villages in the Homburger valley served by the line with its rather large distances between stations. On the other hand, the advocates of maintaining rail services pointed out that buses never offered an equivalent replacement for trains (for example in terms of comfort and punctuality).

In 1912 advance work on the base tunnel through the Jura began. In four years an 8 km-long tunnel was built. During the half century since the summit tunnel was completed, tunnelling methods had fundamentally changed. Hand drills had been replaced by machines and horses had been replaced by smokeless locomotives. In addition, as a precaution, a powerful pump station was built to withstand any flooding of the tunnel. On 8 January 1916, the new line was opened. The Läufelfingen line with its summit tunnel became a side line and the Sissach–Gelterkinden Bahn tram — which had opened between Sissach and Gelterkinden on 16 May 1891 — closed.

The Hauenstein base line is now one of the busiest railway lines in Switzerland. It is a part of the north-south freight axis, on which freight trains of SBB Cargo, BLS Cargo and other companies are busy, including the operation of the rolling highway between Freiburg im Breisgau and Novara for trucks up to four metres high at their corners. Passenger operations on the line consist of half-hourly or hourly (some double-deck) inter-regional and inter-city trains operate on the routes between Basel and Zurich, Bern and Lucerne. In addition, route S3 of Regio S-Bahn Basel provides a local service from Basel to Olten and on to Laufen each hour. The cross-section of the tunnel of 48 m² permits a cruising speed of 140 km/h. In the tunnel trains often cross equally fast passenger trains coming the other way and (slightly slower) freight trains.

The high traffic threatens to create a capacity bottleneck. Therefore, ways of increasing the capacity of the line are being investigated. Recently stations and signalling have been adapted to allow an increase in train frequency. The further increasing of the capacity of the line have been examined in connection with the Neuen Haupttransversale project (the upgrading of the mainline between Zurich and Bern in the 1970s), the recently completed Rail 2000 upgrade of many Swiss lines and the current NRLA project. Capacity was increased as part of Rail 2000 by the opening of a bypass of the bottleneck at Pratteln with an over 5 km-long Adler Tunnel between Liestal and Muttenz in December 2000. A continuation of this line through a third Jura tunnel, known as the Wisenberg Tunnel, between Liestal or Sissach and Olten is currently being debated; it would have connections to the line to Aarau and Zurich and to the line to Olten and Bern. So far, finance has not been found for this project.