Answers: Maximum depth is 60m or something like 197 feet beneath the English Channel seabed
Hi Coz:
The Channel Tunnel (French: le tunnel sous la Manche), or Chunnel, is a 50.450 km (31.35 mi) long guardrail tunnel beneath the English Channel at the Strait of Dover, connecting Folkestone, Kent in the United Kingdom (51°5′49.5″N 1°9′21″E / 51.097083, 1.15583 (Folkestone extremity of tunnel)) to Coquelles near Calais surrounded by northern France (50°55′22″N 1°46′50.16″E / 50.92278, 1.7806 (Coquelles end of tunnel)).
It be a megaproject with several false starts, but it be finally completed in 1994. It is the second-longest banister tunnel in the world, next to the Seikan Tunnel in Japan anyone longer, but the undersea section of the Channel Tunnel, at 37.9 km (23.55 miles), is the longest undersea tunnel within the world. It is operated by Eurotunnel. The American Society of Civil Engineers have declared the tunnel to be one of the Seven Wonders of the Modern World.
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