The civic Sewerage Operation department has completed strengthening work on the sewage line below the Ghatkopar sinkhole.
An official from the department said the seepage from the sewage line must have caused the cavity below the cement concrete road, causing it to cave in, on Wednesday.
Meanwhile, the civic road department has not yet started work on the 2-metre-wide and about 10-foot-deep hole on the Andheri-Ghatkopar Road that suddenly appeared on Wednesday afternoon.
The sewerage operation department inspected the road and started repairing and strengthening the sewage line immediately on Thursday. However, resurfacing of the road will take at least 15 days to complete.
“We will start work after the sewage department completes its job, which is most likely on Monday or Tuesday,” said Raghvendra Kulkarni, BMC chief engineer, road department.
The civic road department has sought a report from the sewage operation department. According to officials from the road department, the reason for the cave-in could be the leak in the old sewer line that runs under the road, or the fact that the cave-in spot is very close to the creek.
The sewer line that runs under the 60-feet-wide road is connected to the Ghatkopar pumping station.
The cement concrete road just outside Pant Nagar bus depot caved in as a dumper was passing over it. Traffic in the area was affected as two lanes were barricaded.