The cause of the collapse of a road surface in Northampton could be due to the fact a water leak washed away the soil although the exact reason may never be fully established, an Anglian Water spokeswoman.
A section of Earl Street, in The Mounts, has been closed since 2pm on Thursday after a large hole appeared in the surface.
Anglian Water workman have made the hole bigger today using a digger to allow for repairs to be carried out to the sewer under the road.
The road is expected to be fully repaired by the end of next week.
An Anglian water spokesman said: “The cause of the surface collapse is unlikely to ever be fully established. It could have been due to the soil being washed away by the water leak or the water leak could have happened because of movement in the ground which can cause pipes to burst in the first place.
“The sewer was damaged when the road collapsed and that is likely to be repaired by the end of the weekend.
“Work will then start on repairing the water main and it is hoped that will be completed by the end of Monday.”
The spokeswoman said Anglian Water would be consulting with Highways Authority about the repair and refill of the surface and it was hoped the road would be reopened by the end of the week.
The six properties in Earl Street that were without water have been moved on to a different supply.