A general view shows the Strait of Messina, Italy, August 5, 2025. The area is part of the planned site for a suspension bridge connecting Sicily to mainland Italy, with construction expected to begin in the second half of 2025. REUTERS/Yara Nardi
A general view shows the Strait of Messina, Italy, August 5, 2025. The area is part of the planned site for a suspension bridge connecting Sicily to mainland Italy, with construction expected to begin in the second half of 2025. REUTERS/Yara Nardi
A view of the seafront shows an area marked for expropriation ahead of the planned construction of a suspension bridge linking the island to mainland Italy, with the Calabrian coast visible in the background, in Messina, Italy August 5, 2025. REUTERS/Yara Nardi
A woman walks with her dog along the Sicilian coast with the Calabrian shoreline visible across the Strait of Messina, Italy, August 5, 2025. The area is part of the planned site for a suspension bridge connecting Sicily to mainland Italy, with construction expected to begin in the second half of 2025. REUTERS/Yara Nardi
Sailboats float off the coast of Calabria near the Strait of Messina, as Italy prepares to begin construction of a suspension bridge that will link Sicily to the mainland, in this view from Catania, Italy, August 5, 2025. REUTERS/Yara Nardi

By Angelo Amante

MESSINA, Italy (Reuters) -Italy's decision to approve the construction between Sicily and the mainland of what would be the world's longest single-span bridge has set the stage for a legal battle that could further delay a project first conceived by the ancient Romans.

Prime Minister Giorgia Meloni's right-wing government gave its final approval for the bridge over the Strait of Messina on Wednesday, earmarking 13.5 billion euros ($15.8 billion) for a project that has been under discussion for more than 50 years.

"They could offer me three times the value of my house, but that doesn't matter to me. What matters is the landscape. They must not touch the Strait of Messina," said Mariolina De Francesco, a 75-year-old living in the Sicilian city of Messina.

More than 440 properties will have to be expropriated on the Sicilian side and in the Calabria region on the mainland to make way for the 3.7-km (2.3-mile) bridge and connecting roads and railways.

"Our lawyers will take action, and we will stop them. That's guaranteed," said De Francesco, whose house lies near the site of one of the bridge's planned 399-metre-tall land towers.

Infrastructure Minister Matteo Salvini said preliminary works should start in September-October, and has promised generous compensation to those required to surrender their property. The bridge is due for completion in 2032.

The Messina Strait Company overseeing the project is bracing for a big legal fight. "(Legal appeals) certainly keep me busy because they waste a lot of our time," its CEO Pietro Ciucci told La Stampa newspaper.

Environmental groups this week filed a complaint with the European Union, flagging serious risks for the local ecosystem.

The Torre Faro district, on the northern edge of Messina, includes a nature reserve surrounding two ponds, and Calabria appears within arm's reach when strolling along the seafront.

SEISMIC RISK

Committees of 'No Bridge' residents say the area's environmental value and seismic risk make it unsuitable for the infrastructure. They also fear the works will drag on, making the neighbourhood unliveable because of the noise.

The Messina Strait Company says the bridge will be designed to withstand very strong earthquakes and will not be placed on active fault lines. It has also promised mitigation measures to safeguard habitats and protected species.

Contractual obligations will ensure that the timing and effects of construction activity, including noise, will be kept under strict control, the company added.

Supporters of the project - awarded to the Eurolink consortium led by Italy's Webuild - say it will bolster the economy of an underdeveloped region.

"The bridge could create jobs for young people, and maybe it could also change something in Sicily, where we always like to keep everything as it is," said 71-year-old Giuseppe Caruso, sitting on his bike near the beach.

Authorities have pledged strong safeguards against any mafia involvement. The two regions are home to the Cosa Nostra and 'Ndrangheta mafia organizations, which have a long history of infiltrating lucrative public works projects.

The government is also considering whether to categorise investment in the bridge as defence spending, which would help Italy meet new NATO targets to boost military budgets.

PUBLIC INTEREST

House expropriations are set to proceed gradually, in line with construction progress.

Activists and lawyers estimate some 1,000 people could lose their homes, and say the increased costs since the project was first awarded may breach European Union public procurement laws.

"We are a country governed by the rule of law within the EU, so even the government must respect the rules," said Antonio Saitta, a lawyer representing some Messina residents.

The Messina Strait Company said the rise in costs, from 8.5 billion euros in 2011 - before the project was blocked - to the current 13.5 billion euros, was due to the sharp increase in construction material prices.

Saitta said the main way of blocking the bridge was to file an appeal with an administrative court against the government's decision by the end of October.

Gianluca Maria Esposito, an administrative law professor at Sapienza University of Rome, said the public interest prevails over the private in such cases and that blocking the project would be a daunting challenge.

"The citizen is entitled to compensation but cannot claim further damages, nor can they oppose the realization of the project," he said.

($1 = 0.8564 euros)

(Reporting by Angelo AmanteEditing by Alvise Armellini and Gareth Jones)