Sinkhole Three Times Larger Than First Could Open On Hertfordshire Street
A new sinkhole almost three times the size of the earlier one that opened on the Hertfordshire Street earlier this month is expected to open again on the same street, said experts. The new data came after experts conducted the geophysical survey of the area.
Experts after conducting geographical survey of the St Albans road where a gaping 66ft wide and 33ft deep developed overnight found significant anomalies in the surrounding ground.
The survey, commissioned by Hertfordshire County Council, revealed that homes on Fontmell Close and Bridle Close were constructed on an old clay pit that was later backfilled with waste. They suspect that there could be chalk mine underneath the clay pit.
The council said chalk excavation in the bedrock beneath the clay-pit was the most likely cause of the collapse.
Richard Haddrell, 69, who has lived on the road for 34 years, told the Telegraph: “There’s a great deal of anxiety in the whole area because people simply don’t know what’s underneath their houses and the major problem is that the value of the house is going to be considerably less than it was”.
Haddrell said one of his neighbors shifted to the place just a day before the sinkhole, and had now discovered the anomaly is right beside their home.
Officials said so far 48 lorry loads of foamed concrete have been poured into the sinkhole to fill the void, which left 58 properties temporarily without gas, electricity and water.
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