But what exactly is a sinkhole, and what are the warning signs? Here’s everything you need to know. A sinkhole is a depression in the ground with no natural external surface drainage.

danger points in pipes According to Saitama Prefecture, the sewage pipe, measuring 4.75 meters in diameter, was built in 1983 and curves about 10 meters deep beneath the intersection.

But what exactly is a sinkhole, and what are the warning signs? Here’s everything you need to know. A sinkhole is a depression in the ground with no natural external surface drainage. This means that ...