Sinkhole
© Shepparton NewsThe mystery sinkhole that appeared in Shepparton last week.
Even after extensive excavation on the site of the mystery sinkhole that appeared in Shepparton last week, the council is stumped as to just what caused it.

Council workers got a closer look at the sinkhole that opened up in Lightfoot St last week to see if recent heavy rain could have been the cause of the mystery hole.

Shire infrastructure director Steve Bowmaker said the excavation created more questions than answers as it was too dry to have been caused by the wet winter.

''I have to say that despite our best efforts, we don't know what the problem is,'' he said.

''It is possible there could have been that void in there for an extended period.''

He said residents in the street were not in any danger of cave-ins, despite the sinkhole extending to 4m deep and a few metres wide.

Stabilisation and resurfacing work will continue on the street next week, although much of the work was already scheduled before the sinkhole opened.

Just as to what caused the sinkhole, Mr Bowmaker said it was possible it was from a wash away many years ago.

''It is something that has developed over a period of years,'' he said.

However, he said residents should soon be driving on one of the best streets in the municipality when construction was finished.