Is there a tunnel under the Hudson River?

The first Hudson River vehicular crossing, the Holland Tunnel connects Canal Street in Manhattan with 12th and 14th streets in Jersey City, NJ, and is considered an outstanding engineering achievement. As a tribute, it bears the name of its first chief engineer, Clifford M.



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It is about 1.5 miles (2.4 km) long and lies 97 feet (30 metres) below the river's surface. The central tube was the first to open, in 1937, and has reversible traffic lanes; it is the longest of the three tubes, 8,216 feet (2,504 metres).

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Project Status The Hudson Tunnel Project involves construction of a new Hudson River rail tunnel serving New York Penn Station and the rehabilitation of the existing Sandy-damaged North River Tunnel.

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Construction started simultaneously on both sides of the river. Precise measurements ensured that each tube lined up perfectly to meet in the middle. Tunnel workers (affectionately known as 'sandhogs') dug through the mud by pneumatically pushing cylindrical shields through the river bottom.

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“Its skeletal structure is made up of hundreds of massive 21-ton iron rings that were bolted together. In addition, the interior of the rings is encased in concrete, thereby sealing out the Hudson River.”

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Geology. The Hudson is sometimes called, in geological terms, a drowned river. The rising sea levels after the retreat of the Wisconsin glaciation, the most recent ice age, have resulted in a marine incursion that drowned the coastal plain and brought salt water well above the mouth of the river.

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This results in a total of 59 bodies floating down the lower Hudson every year (49 or 50 from NYC, 5 or 6 from Bergen County, and about 4 from Hudson County). 59 divided by 365 gives you about 0.16 bodies per day.

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Meanwhile, a cruise ship can travel more than 150 miles, depending on the ship's size and its draft, as well as the depth of the river. A sailboat can travel up to 160 miles on the Hudson River, while a motorboat can travel up to 200 miles.

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Norwegian road infrastructure operator Statens Vegvegsen has officially opened world's deepest subsea tunnel, the 14.4km Ryfylke tunnel near Stavanger. The tunnel reaches a maximum depth of 292m below sea level. It is part of the Ryfast road project to link national highway 13 between Stavanger with Strand in Rogaland.

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Cappadocia city, located in central Turkey, is home to no less than 36 underground cities, and at a depth of approx. 85 m, Derinkuyu is the deepest.

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Also known as the Cobble Hill tunnel, the half-mile Atlantic Avenue tunnel is not only the oldest subway tunnel in NYC but also the world. Running beneath Brooklyn's Atlantic Avenue, it was first built in 1844 and was sealed off in 1861.

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The Holland Tunnel is a vehicular tunnel under the Hudson River that connects Hudson Square and Lower Manhattan in New York City in the east to Jersey City, New Jersey in the west. The tunnel is operated by the Port Authority of New York and New Jersey and carries Interstate 78.

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