![Benchmarks: February 12, 1986: France and the U.K. sign the Treaty of Canterbury, paving the way for the Chunnel Benchmarks: February 12, 1986: France and the U.K. sign the Treaty of Canterbury, paving the way for the Chunnel](https://www.americangeosciences.org/static/earth/benchmarks-february-12-1986-france-and-uk-sign-treaty-canterbury-paving-way-chunnel/Cantner_ChunnelCrossSection.jpg)
Benchmarks: February 12, 1986: France and the U.K. sign the Treaty of Canterbury, paving the way for the Chunnel
How did they manage to build the Channel Tunnel in only 6 years, while the Gotthard Base Tunnel or Brenner Base Tunnel of similar length took 15-20 years? - Quora
![The French Channel Tunnel Crossover was created by first building a cavern around two rail tunnels which were then dismantled Stock Photo - Alamy The French Channel Tunnel Crossover was created by first building a cavern around two rail tunnels which were then dismantled Stock Photo - Alamy](https://c8.alamy.com/comp/AG82FG/the-french-channel-tunnel-crossover-was-created-by-first-building-AG82FG.jpg)
The French Channel Tunnel Crossover was created by first building a cavern around two rail tunnels which were then dismantled Stock Photo - Alamy
![How did they manage to build the Channel Tunnel in only 6 years, while the Gotthard Base Tunnel or Brenner Base Tunnel of similar length took 15-20 years? - Quora How did they manage to build the Channel Tunnel in only 6 years, while the Gotthard Base Tunnel or Brenner Base Tunnel of similar length took 15-20 years? - Quora](https://qph.cf2.quoracdn.net/main-qimg-a43422b7fcb234d20cd17430a7a7e7e3.webp)