The Queens-Midtown Tunnel was first planned in 1921, though the plans for the tunnel were modified over the following years. By the 1930s, the tunnel was being proposed as the Triborough Tunnel, connecting Queens and Brooklyn with Manhattan's east and west sides. Find out when was the Queens Midtown Tunnel built? How was the Queens Midtown Tunnel built? Why does the Queens Midtown Tunnel have doors? Does the Midtown Tunnel flood?

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