Deep underground

Source: Wikipedia, the free encyclopedia.

Deep underground (大深度地下, dai-shindo chika) is a Japanese concept for the public use of deep underground, enabled by a 2001 law. It was first thought of in the late 1980s as Japan faced ever-increasing land values in the

utility ducts and other city tunnels
.

However, due to technical difficulties in ventilation, emergency procedures and other safety-related issues and the relatively high cost, no projects using deep underground have been completed as of 2010.

Definition

In the case of public use, no compensation to the land owner is required.

Projects using the law

  • Underground water mains in Kobe (Chūō-ku, Kobe)
    • Project approved on June 19, 2007 (first ever in Japan).
  • Tokyo Gaikan Expressway (Tōmei Junction - Ōizumi Junction/Interchange)
    • Project status elevated to construction stage on April 27, 2009.

Projects anticipated to use the law

External links