* "tunnel which is usually at a depth of 15 meters is at a depth of 8-10 meters from the surface"
* Above line reported is very frightening, and it appears that an extensive study of soil, site conditions, design and safety, which is essential before commencement of any tunneling work, have not been done properly.
* If enough depth is not given to metro tunnel, there are chances that even after commissioning of the project, vibrations of the moving metro trains may continue damaging the nearby buildings in future.