our pre cast tunnel all Done @ Malaysia,
circle line all not affected
HDB up grading pre cast also done out side Singapore
IR Sand casino project dig out more sand when they need to have
basement level, that area we land filled at least more than 7 years
already.
Jurong island also digging more ground for underground Fuel
storage
safely 15% of our Singapore island land below hollow,
MRT line, NE line, circle line