The waterway accident in the center of Tallinn, at the intersection of Mere puiestee and Ahtri Street, resulted in stopping tram traffic. A 200-mm-diameter water pipe broke. Asphalt sank next to the tramway at the accident site and the sinkhole opened. As the load-bearing structural layers under the tramway were washedout, tram traffic was stopped. One of the trams that derailed from its path was also affected. According to City Transport Company, the water accident was very extensive, resulting waterflow approximately 800 cubic meters per hour.
At 8:00 in the morning, it was discovered that there was an accident.
At 9.00 URETEK made a call to the appropriate authorities about the problem
At 10.30 URETEK visited the site and discussed possible problem solutions.
The appropriate paperwork and the preparation time took from 12.00 to 21.00.
The execution of the works started from 00.00.
During the works, the initial position of the tramway was restored and, in agreement with the customer, it was decided to increase it by another 2 mm in order to prevent any subsidence due to soil compaction.