The Orkney Tunnel is a suggested undersea road tunnel between Orkney and Caithness on the Scottish Mainland. The expected length of it would be about 9–10 miles (15–16 km).
The tunnel, if constructed, is assumed to make landfall on South Ronaldsay. A total bill of £100 million is mentioned.[1][2]
There are also suggested plans to connect Orkney Mainland to Shapinsay.[3]
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