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Dozens of sinkholes appeared in Quebec

dozens-of-sinkholes-appeared-in-quebec

Engineers and geologists are examining dozens of deep holes that appeared in the ground in Quebec City’s north end this week, as residents are being urged to leave their homes for safer locations.

City officials served evacuation papers Wednesday to about 15 homes and one business in Quebec City’s Charlesbourg district, where nearly 40 holes have been reported. The holes, ranging between five and eight metres wide, have appeared this week in various fields, and on one residential driveway.

The deepest hole is about five metres deep. Some of the holes have closed, but the remaining gaps are mystifying officials.

The field is like, there is nothing, no trees or anything and you see everywhere some holes, some deeper than others, like 30 or 40 holes everywhere on the field. You can see this is not normal. You can see this is a problem on this land,” said city spokesperson François Moisan.

Some of the affected fields used to be sandpits, but experts are running tests with surface radar instruments to analyze the soil. Evacuation is optional, but strongly recommended. At least 40 residents have heeded the optional evacuation recommendation. Other residents who chose to leave their homes are using Red Cross emergency services. (CBC)

Engineers are running three kinds of tests:

  • Geophysical: Using ultrasound to locate soil anomalies.
  • Geotechnical: Creating holes in affected areas to evaluate underground sediment.
  • Laser sweeping: To collect daily topographic data to measure any changes.

 

 

 

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