Viaduc de la ravine des Trois-Bassins, Cable-stayed bridge in Saint-Paul, France.

The Viaduc de la ravine des Trois-Bassins is a 374-metre-long, 22-metre-wide extradosed cable-stayed bridge on the Route des Tamarins, crossing the Ravine des Trois-Bassins valley at a height of about 70 metres. Its deck is a single-cell prestressed concrete box girder, 4 metres deep and rising to 7 metres at pier P1, widened by steel struts to carry four lanes. Two unequal pylons stand on the median, and the three piers, 48, 37 and 8 metres tall, all rise from the gentler southern slope.

The viaduct was built between 2005 and early 2009 as a work on the Route des Tamarins, the road that runs along the west coast of Reunion. It was designed by Arcadis, Coteba and the architects of Cabinet Strates, and built by a group formed by Eiffage Travaux Publics, Razel and Matière. It crosses the ravine on the boundary between Saint-Paul and Trois-Bassins.

This viaduct connects different communities of Reunion Island, forming a vital link between Saint-Paul and Etang-Sale regions through modern architectural design.

The best way to experience this bridge is to cross it by vehicle or view it from nearby vantage points in the surrounding area. You can see the structure from below at certain angles in the ravine, which highlights the dramatic height difference created by the pillars.

The support pillars of this viaduct vary dramatically in height, ranging from just 8 meters to 48 meters, as they adapt to the uneven ravine below. These varying heights become noticeably apparent when traveling across the structure.