In order to allow the Yonne channel feeding the Nivernais canal to cross the valley, a "grand pont" was built in 1841 under the direction of engineer Fourneau. A deck of 152 metres was thrown between the two slopes at the point where the valley is narrowest. Thirteen 10-metre wide semicircular arches stand 33.5 metres above the Yonne. The water from the Yonne (which flows at the foot of the structure), captured upstream at the Pannecière dam via gutters, passes over the aqueduct and feeds the canal as far as the water sharing reach between the Loire and Seine basins at "Port Brûlé", in the commune of La Collancelle. The work was awarded around 1838 and completed in 1843, the year the Nivernais Canal was commissioned.
Various footpaths take you quickly to the aqueduct from where you have a magnificent view.