Top Cities

Elon Musk Wants to Dig Tunnels in America’s ‘Sinkhole Capital’ – News

In “yet another example of Musk’s perpetual grift of making empty promises to city leaders,” writes Alissa Walker, the Tesla CEO is floating the idea of building car tunnels under the city of Miami through his tunnel-digging subsidiary, the Boring Company. Critics question the efficacy of underground tunnels in a city known as “the sinkhole capital of the United States,” pointing to the “astronomical” costs of the rare few tunnels that have been built in the city. A Port of Miami tunnel that runs for less than a mile through a shallow channel cost roughly $1 billion to build, and it’s unclear “whether or not the Boring Company has truly been able to cut tunneling costs.”

Cost aside, another major issue facing any underground projects in Miami will be legal liability and the highly unpredictable effects of digging tunnels through unstable ground. “The ground beneath Miami is a highly dissolvable limestone karst that’s filled with cavities and caverns just like the sea floor,” writes Walker, making it difficult to predict how a tunnel might affect the land and buildings above it. “Because part of the issue with the changing of the water table is that it won’t be a direct cause and effect — 30 blocks away is what is going to sink,” says Mika McKinnon, a field geophysicist and disaster researcher, questioning Musk’s plans for assessing legal liability. “This is not a feasible project without sinkholes, so what will they do when they get sued?”

McKinnon warns that investing in Miami’s infrastructure may also be a lost cause in the long term thanks to the ravaging effects of climate change. “By 2100 it’s estimated that a large portion of Miami-Dade County will be rendered uninhabitable by up to five feet of rising ocean” and close to a million residents will face displacement. “It’s a lost city. It’s a zombie city. Buying coastal property in Miami is like throwing your money into the ocean.”

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