Sursee-Triengen Railway

Sursee–Triengen-Bahn, commonly abbreviated ST and known in English as the Sursee–Triengen Railway, is a Swiss railway company associated with the standard-gauge line between Sursee and Triengen in the canton of Lucerne. The railway’s principal route is approximately 8.9 kilometres long and connects with the Swiss Federal Railways network at Sursee. Unlike most Swiss railway lines, it was never electrified. The line opened on 23 November 1912 using steam traction and initially supported both passenger and freight activity. The company’s early motive power consisted of two small steam locomotives, designated E 2/2 numbers 1 and 2. A distinctive steam railcar, FZm 1/2 number 11, was added in 1917; it included compartments for mail and baggage as well as passenger accommodation. By the early 1960s, these original vehicles were reaching the end of their useful lives. They were replaced by second-hand Swiss Federal Railways E 3/3 “Tigerli” locomotives, while a tramway-style Ed 2/2 locomotive was also leased for a period. In 1965, ST acquired a small diesel locomotive, beginning a gradual transition away from routine steam operation. A second diesel, an SBB Tm IV type, arrived in 1976. Passenger service was discontinued on 25 September 1971. Proposals had been discussed for a larger Suhre Valley railway linking the ST line with the metre-gauge Aarau–Schöftland route of the Wynental and Suhrental railway. The concept would have involved a new connection between Schöftland and Triengen, a third rail on the ST route, and electrification so that trains could run between Aarau and Sursee. The proposal was not implemented, partly because new secondary railways were no longer considered attractive investments and because Triengen and Schöftland were located in different cantons. After the end of passenger rail service, a bus connection between Sursee, Triengen and Schöftland served the broader corridor. Freight remained important after passenger operations ended. The railway retained its line and continued to function as an infrastructure and freight-oriented company. Following the 1999 reform of Swiss railway law, SBB Cargo assumed responsibility for delivering freight wagons to their destinations under the open-access framework and took over ST’s Tm IV locomotive. The company’s present identity therefore combines railway infrastructure ownership with heritage and excursion-train activity rather than scheduled passenger transport. ST also has an important role in the Zürcher Oberland heritage railway network. In 2018 it acquired the section of the former Uerikon–Bauma railway between Hinwil and Bäretswil from SBB. In 2019 it leased the continuation from Bäretswil to Bauma from the Dampfbahn-Verein Zürcher Oberland, giving ST operational control of the connected section. The route supports limited freight movements and excursion trains operated by the heritage railway association. The preservation of historic rolling stock became increasingly significant during Switzerland’s nostalgia and heritage-railway boom. ST retained older passenger coaches and resumed steam excursions. Its historic locomotive 8522 was transferred to Dampfbahn Bern for restoration and use for a period. The locomotive is notable for having received an electrically heated boiler during the Second World War, when coal supplies were constrained; the electrical equipment and pantograph were removed after the war. A feasibility study commissioned by ST and prepared with ETH Zurich was published in May 2009. It examined the possibility of restoring passenger services and extending the railway toward Schöftland, but local opposition in Triengen and concerns about the financial burden of renewed passenger operations have prevented implementation.

The Sursee–Triengen Railway was established to connect Triengen with Sursee and the Swiss Federal Railways network. Its approximately 8.9-kilometre standard-gauge line opened on 23 November 1912 with steam locomotives. The original fleet included two E 2/2 locomotives, followed in 1917 by the unusual FZm 1/2 steam railcar number 11, which carried passengers as well as mail and baggage. The railway’s original passenger infrastructure included Sursee-Stadt station, located north of Sursee’s old town and connected to the SBB station by a broad curve. Changes associated with road development and construction of the N2 motorway led to the removal and relocation of parts of this alignment. The former station building survived and was later used as a restaurant known as Bahnhöfli. During the early 1960s, ST replaced its original steam vehicles with used SBB E 3/3 “Tigerli” locomotives. A leased Ed 2/2 tramway-type locomotive was also used for a time. The company purchased a small diesel locomotive in 1965 and obtained an additional SBB Tm IV-type diesel in 1976. Regular passenger trains ended on 25 September 1971, after which a bus service served the Sursee–Triengen–Schöftland corridor. Several plans sought to integrate the line into a larger Suhre Valley railway. These included a new metre-gauge section between Schöftland and Triengen, a third rail on the ST route and electrification. The intended result was through electric service between Aarau and Sursee while retaining the ability to move freight on standard gauge. The project was not built, partly because the period was unfavorable for new secondary railways and because the proposed route crossed cantonal boundaries. Freight operations continued after passenger service ended. The 1999 reform of Swiss railway law changed freight access arrangements, and SBB Cargo took over final delivery of freight wagons previously associated with ST. This left ST primarily as an infrastructure owner and heritage-train operator. The company retained historic coaches and participated in the revival of steam excursions. Locomotive 8522, one of its historic Tigerli locomotives, was given to Dampfbahn Bern for overhaul and use for a period. The locomotive had earlier been fitted with electric boiler heating during the Second World War to reduce coal consumption; that equipment was removed after the war. ST later expanded its infrastructure portfolio beyond the Sursee–Triengen line. In 2018 it acquired the Hinwil–Bäretswil section of the former Uerikon–Bauma railway from SBB. In 2019 it leased the Bäretswil–Bauma section from the Dampfbahn-Verein Zürcher Oberland. The connected route hosts limited freight traffic and excursion trains operated by the heritage railway organization. A 2009 feasibility study prepared with ETH Zurich considered the restoration of passenger service and a possible extension to Schöftland, but the proposal encountered opposition from Triengen and concerns over the public cost of a renewed service.

1. 2019Bäretswil–Bauma section leased

   ST leases the continuation to Bauma from the Dampfbahn-Verein Zürcher Oberland.

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2. 2018Hinwil–Bäretswil section acquired

   ST acquires the Hinwil–Bäretswil section of the former Uerikon–Bauma railway from SBB.

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3. 2009Passenger-service feasibility study published

   A study produced with ETH Zurich evaluates restoring passenger trains and extending the line toward Schöftland.

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4. 1999Freight delivery transferred to SBB Cargo

   Rail-law reform and open-access freight arrangements result in SBB Cargo taking over wagon delivery and ST’s Tm IV locomotive.

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5. 1976Additional SBB diesel arrives

   A second diesel locomotive of SBB Tm IV type is added to support railway operations.

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6. 1971Regular passenger operations cease

   Scheduled passenger service ends on 25 September and is replaced in the corridor by bus transport.

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7. 1965First diesel locomotive purchased

   ST purchases a small diesel locomotive as the railway begins moving away from routine steam traction.

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8. 1917Steam railcar enters service

   FZm 1/2 number 11 joins the fleet, combining passenger accommodation with mail and baggage compartments.

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9. 1912Sursee–Triengen line opens

   The approximately 8.9-kilometre railway between Sursee and Triengen begins operation with steam traction on 23 November.

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A small Swiss railway infrastructure and heritage-railway operator focused on preserving non-electrified standard-gauge railway assets, supporting limited freight activity, and enabling steam excursions rather than providing scheduled passenger service.

• Sursee–Triengen railway infrastructureRailway infrastructure1912

  ST owns the approximately 8.9-kilometre standard-gauge line linking Triengen with Sursee, where it connects with the SBB network. The line was built for mixed passenger and freight use but has not been electrified. Following the end of scheduled passenger service, its principal role has been infrastructure provision, limited freight access and heritage operation.

• Steam excursion trainsHeritage railway service

  ST preserves and supports steam-hauled excursion operations using historic locomotives and passenger coaches. The heritage offering developed during Switzerland’s railway nostalgia movement after the end of regular passenger service and provides occasional public and charter journeys rather than scheduled transit.

• Hinwil–Bäretswil–Bauma railway sectionHeritage and freight railway infrastructure2019

  ST owns the Hinwil–Bäretswil section of the former Uerikon–Bauma railway and leases the continuation from Bäretswil to Bauma. The connected route supports limited freight traffic and excursion trains operated by the Dampfbahn-Verein Zürcher Oberland.

• 2019Lease the Bäretswil–Bauma continuationM&A

  The continuation of the line beyond Bäretswil was associated with the Dampfbahn-Verein Zürcher Oberland heritage railway.

  What changed. ST leased the Bäretswil–Bauma section from the Dampfbahn-Verein Zürcher Oberland.

  Aftermath. ST obtained control over the connected Hinwil–Bauma route, which continues to support limited freight and excursion operations.

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• 2018Acquire Hinwil–Bäretswil infrastructureM&A

  A section of the former Uerikon–Bauma railway remained available after the line’s earlier changes in ownership and use.

  What changed. ST acquired the Hinwil–Bäretswil section from Swiss Federal Railways.

  Aftermath. The acquisition expanded ST’s infrastructure portfolio into the Zürcher Oberland heritage-railway environment.

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• 2009Evaluate passenger-service restoration and Schöftland extensionStrategy

  ST commissioned a feasibility study with ETH Zurich to assess whether passenger service could be restored and whether the railway could be extended toward Schöftland.

  What changed. The study was published in May 2009 and examined the operational and infrastructure feasibility of the proposal.

  Aftermath. The project did not proceed. Triengen opposed renewed passenger rail because road access was considered better, and concerns were raised about the municipality’s possible share of higher operating deficits.

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• 1971End scheduled passenger rail serviceStrategy

  The ST passenger railway faced the broader difficulties affecting small Swiss secondary railways, while road transport offered increasing flexibility in the Sursee–Triengen–Schöftland corridor.

  What changed. ST ended regular passenger operations on 25 September 1971 and the corridor was served by buses.

  Aftermath. The company concentrated on infrastructure, freight-related activity and later heritage excursions.

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• 2019ST leases the Bäretswil–Bauma section

  ST leased the Bäretswil–Bauma section from the Dampfbahn-Verein Zürcher Oberland, creating control over the connected heritage railway route from Hinwil to Bauma.

  M&A
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• 2018ST acquires the Hinwil–Bäretswil section

  ST acquired the Hinwil–Bäretswil section of the former Uerikon–Bauma railway from Swiss Federal Railways.

  M&A
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• 2009ETH Zurich study examines restored passenger service and a Schöftland extension

  A feasibility study commissioned by ST and prepared with ETH Zurich considered reinstating passenger trains and extending the railway toward Schöftland. The proposal faced local and financial objections.

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• 1999SBB Cargo takes over wagon delivery after Swiss rail-law reform

  Following the reform of Swiss railway law and the introduction of open-access freight arrangements, SBB Cargo took over the delivery of freight cars to their destinations and assumed ST’s Tm IV locomotive.

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• 1971Passenger service ends on the Sursee–Triengen line

  Regular passenger operations on the ST railway ended on 25 September 1971. Bus services subsequently connected Sursee, Triengen and Schöftland.

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1. Sursee–Triengen Railway
2. Official Sursee–Triengen-Bahn website