Puits de Sangatte, Ventilation shaft near Sangatte, France
Puits de Sangatte is a ventilation shaft for the Channel Tunnel near Sangatte in northern France. The cylindrical structure provided access for construction equipment and workers during the tunnel's development beneath the seabed.
Engineering surveys began in 1875 under Labrousse, Potier and others to establish the first shaft at this location. Multiple shaft generations were constructed over more than a century, each reflecting renewed efforts to realize a Channel Tunnel link.
The shaft construction site received 14,000 visitors during a single weekend in 1975, demonstrating public interest in cross-channel infrastructure development.
The location stands roughly 450 meters from the coastline and functioned as a critical ventilation point for the Channel Tunnel system. The site today is largely an industrial heritage area that illustrates the broader scope of tunnel construction.
The site attracted 14,000 visitors in a single 1975 weekend, revealing the tremendous public fascination with this cross-channel infrastructure project. This extraordinary turnout showed how deeply people were captivated by such a bold engineering undertaking.
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