Chemin de Fer à vapeur des Trois Vallées

The Chemin de fer à vapeur des Trois Vallées (English: Three Valleys Steam Railway) is an heritage railway in southern Belgium, created in 1973.

It is a non-profit society that operates a railway from the town of Mariembourg, near Couvin to Treignes, near Viroinval. The length of the railway runs about 14 km over standard gauge track. The society's name comes from the three rivers followed by the line; River Eau Blanche, River Eau Noire, and River Viroin. The heritage railway connects with the greater Belgian rail network in Mariembourg.

The society runs two main facilities. The society has constructed its own platforms near the old locomotive roundhouse and water tower in Mariembourg, and in Treignes, a former border station, a museum with a large workshop has been built. The last 3 kilometers from the line (partially established in France) are no longer usable, as its tunnel has been sold and turned in a mushroom growing plant.

Founded by former rail employees, the society purchased many steam engines from the largely nascent coal industry in its early years. Since then, it has also acquired representative rolling stocks from Belgium and neighbouring countries, France and Luxembourg, and from countries where steam locomotives were still in use, such as Poland and East Germany.

NE61 (SACM).

TKt48-87

Elna 158

SNCV 808

DR 64.250

AD07 at Treignes in 1982

A few other locomotives from the National Railway Company of Belgium are display at Treignes Museum.

SNCB 7304

SNCF 63123 painted as CFF Em 4/4

4407 railcar

554.11 and 4610

CFL 211
Olloy-sur-Viroin

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