Raúl Uranga – Carlos Sylvestre Begnis Subfluvial Tunnel, Underwater road tunnel in Santa Fe, Argentina
The Raúl Uranga – Carlos Sylvestre Begnis Subfluvial Tunnel is a road tunnel beneath the Paraná River, linking the provinces of Entre Ríos and Santa Fe. The passage runs more than two kilometers under the riverbed and carries two lanes of traffic in a single direction at a time.
Construction began in 1962 and lasted seven years, with the first permanent river crossing opening on December 13, 1969. Completion allowed a direct road link between both provinces for the first time without relying on ferry service.
The tunnel's name honors two provincial governors, Raúl Uranga and Carlos Sylvestre Begnis, who signed the construction agreement in 1960 to unite their regions.
Traffic flows in alternating directions, with the direction changing depending on the time of day. Drivers should prepare for tunnel lighting and observe speed limits that apply inside the passage.
The tunnel segments were prefabricated on land, then towed into the water and lowered onto the prepared riverbed. Individual sections were then connected and sealed underwater.
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