The bridge fell into a bad state during the 17th century. By 1644 the bridge was missing four arches. A flood in 1669 broke even more of the structure. After this, the other arches have collapsed one after the other, or they have been demolished. As of 2020, only four of the arches are left. The only other visible part of the bridge is some masonry from pier 11. This is attached to a private building on the Île de la Barthelasse. Remains of other piers are buried under a thick layer of sediment on the island or at the bottom of the Rhône. Piers 9 and 10 are both now on the Île de la Barthelasse. They were confirmed by cores drilled at the positions historians thought. They found masonry from the piers at a depth of below ground level. Just below the masonry, at a depth of around there were wooden fragments (small pieces). These were made of silver fir ("Abies alba"). Carbon-14 dating of this material gave dates of 1238–1301 AD for pier 9 and 1213–1280 AD for pier 10 (the range is for 2σ).