World-class underground discharge

[MikeLigalig.com]

Always Japan
A world-class underground discharge channel has been constructed on the outskirts of Tokyo, the capital of Japan. The tunnel, dug about 50 meters below ground, extends 6.3 km in total. The underground construction, comprising vertical shafts to store floodwater – which look more like gigantic tanks – and a mammoth water tank supported by towering pillars weighing 500 tons each, is far beyond anyone's wildest imagination. It was planned as an anti-flood scheme for local residents and completed in 2006. The underground discharge channel, having employed a variety of new technologies, is the very best of Japan's state-of-the-art civil engineering technology.

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