No! Most certainly not!
It is 250 feet deep.
The channel tunnel is, on average, 45m below the seabed. (1) The ocean depth between Dover and Calais is, on average, 50m. (2) Hence it can be guestimated that the tunnel is, on average, roughly 100m below sealevel for the undersea section of the tunnel. (1) http://www.channeltunnel.co.uk/Faqs.asp (2) http://www.worldatlas.com/aatlas/infopage/englishchannel.htm
3.4 miles deep
grand canal
11,013 feet 2.1 miles
There is really no limit to how long a ants tunnel can get...but most of the time a ants tunnel can get to 3 to 5 feet deep into the ground...
37,000 feet or about 7 miles
4 miles is 21,120 feet.
0.189 miles is 997.92 feet.
12,925 feet is 2.45 miles.
0.189 miles is 997.92 feet.
400 miles