The best case is a circle, giving a perimeter of 50 miles. Some other projects to compare it by: 94 miles total for the three bores of the Channel Tunnel 120

The best case is a circle, giving a perimeter of 50 miles. Some other projects to compare it by: 94 miles total for the three bores of the Channel Tunnel 120 miles for the Suez canal, finished 149 years ago 51 miles for the Panama canal, finished 104 years ago with steam shovels Clearly, we can do this.