Crown failure of a tunnel that used to link two quarries in Grays, Essex has been cited as the cause of a 3m wide, 15m deep hole that opened up in Hogg Lane last week.
Thurrock Council has said that an investigation into the subsidence is continuing and said that until this is completed and repairs undertaken, a date for reopening of the road cannot be scheduled.
According to reports in local media, the 100 year old tunnel used to link Titan Pit with Badgers Dene quarry and is one of a network in the area.
The hole in the road is reported to have opened suddenly in front of a lorry that ended up stranded over the subsided area.
Essex Fire Service station officer Richard Maddams, incident commander, said: “The road just opened up under the lorry. There is a sinkhole a couple of metres big in the road. The lorry hasn’t fallen down the hole but is straddling it.
“Right now we are leaving the lorry exactly where it is until surveyors can come in and inspect the road before the lorry is safely moved. There are gas mains in the road so it’s important that we are careful about moving the lorry and so it’s safer to leave it where it is until we know more about the condition of the road.”