Roman Structures > Aqueducts > Aqueduct of Yzeron

Aqueduct of Yzeron

YzeronLugdunumThe Yzeron aqueduct had a few side branches but the main water supply came from a small lake at the W side of the village Yzeron, some 20 km SW of Lyon. From here the first 365 m are called 'Le canal de Monteroux'. The next 7 km consists of a tiny canal roofed with stone slabs. Its course here can be easily followed in the wood NE of Yzeron. In this part of the trace the aqueduct loosed fast height (from 715 - 600 m, 1,5%).Further on the aqueduct followed the mountain-ridge with a slope of 8 % (!). To prevent severe problems hydraulic staircases were built with 30 - 100 m long horizontal conduits alternated with fall chambers. Some of these can be found in Le Recret, see photographs.Some 8 km before Lyon the first of two successive siphons starts at La Tupinier (length of the siphons 2200 and 3800 m, deep 30 and 90 m) with a double tank-tower halfway in Craponne. Only two of the 14 pillars are visible now and are called 'Les Tourillons'. Together with the Aspendos double siphons in Turkey (actually there was a triple siphon) Les Tourillons were the only known examples in the Roman Empire.Almost nothing has been left of the last part of the Yzeron aqueduct.W.D. SchramLyon - LUGDUNUMItemInfoLength27 (+13) kmCross-section0,42-0,55 m x 1,00-1,25mVolume13.000 m3/dayFall... %Period20 - 10 BCFeaturesdouble siphonRecommended literature:M. Jean Burdy: Préinventaire des monuments et richesses artistiques II L'Yzeron (1991)Recommended website:Archeo LyonHow to visit:See M. Jean Burdy: Guide des Aqueducs Romains de Lyon (1999) and the Recommended literature

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