The following few pics are from a reasonably-sized storm water storage tunnel under Paris. It will prevent the nearby drains from overflowing into the Seine during heavy rains. The stored water will progressively be treated once the weather gets better.
The system is made of two huge 100 feet deep wells located nearly 2 kilometres away from each other. A massive 22 feet wide tunnel connects them together. A secondary pipe runs underneath the Seine to collect the streams from two drains located on the other bank. Several rooms with watertight doors will contain the hardware to control the pumps and the flap gates of the network.
The access is in an industrial area where an unlikely amount of moustachioed gents in tight shorts like to hang out. We understood pretty quickly what they were after. The opposite is probably untrue.
Cheers,
Marc.
The system is made of two huge 100 feet deep wells located nearly 2 kilometres away from each other. A massive 22 feet wide tunnel connects them together. A secondary pipe runs underneath the Seine to collect the streams from two drains located on the other bank. Several rooms with watertight doors will contain the hardware to control the pumps and the flap gates of the network.
The access is in an industrial area where an unlikely amount of moustachioed gents in tight shorts like to hang out. We understood pretty quickly what they were after. The opposite is probably untrue.
Cheers,
Marc.