Grand Arvou Bridge

Porossan, Italy

The Bridge of Gran Arvou spans the Rû Prévôt irrigation canal, and includes a large corridor covered by flagstones.

The Grand Arvou is an arch bridge, with a span of 68.5 m and an elevation of 13,60 m between the arch's top and the ground; the distance between the roof and the base of the arch is 10,5 m. The bridge is built in mortar and small incoherent stones, with partial plastering. The plan is irregular, with a general trapezoidal shape, but without the main parallel side; the walls's thickness varies from 50 to 55 cm. The roof is covered by flagstones, which helped it resist to the centuries.

In the late 13th-early 14th century, there was a series of programs aiming to improve the irrigation level in Aosta Valley, due to increased demand of animal husbandry. One of this was the construction of canal, the Rû Prévôt, by will of Henry of Quart, provost (hence the name) of the Aosta Cathedral. This included also the couple of bridge-aqueducts which are now visible.

The income of the canal exploitation was later acquired by the Dukes (later Kings) of Savoy. In the 20th century, the canal was mostly channeled into pipes.



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    Founded: c. 1288

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    4.5/5 (based on Google user reviews)

    User Reviews

    Brenda Castro (6 months ago)
    Very nice site, not very touristy. You arrive by bus 6, get off and go to the entrance from the path, it is located to the right of the aqueduct, it is not signposted.
    Francesco Sinacori (7 months ago)
    Beautiful architecture, a pity that the locals do not look kindly on those who go to visit it, I say this because at the beginning of the road that crosses a small group of houses, they have placed a sign with the inscription, private property forbidden to access. But the path passes right by that road.
    Simo B (8 months ago)
    Place badly marked with google ... we could not park to find the path ... the municipality did not even put the signs
    60gabry (10 months ago)
    An imposing work, which can be visited externally and internally, located in a very pleasant setting on the heights of Roisan, and with wide views.
    alberto rigoni (13 months ago)
    Incredible engineering-hydraulic work of 2k years ago.
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