Caltrans crews continued to investigate on Friday night the cause of a sinkhole that shut down part of Highway 126 in Fillmore.
Gustavo Ortega, a Caltrans geologist, said workers dug an 8-foot trench near the hole on Highway 126 at Central Avenue to find the source, but it remained unclear.
“We still don’t know,” Ortega said of the cause. “So far we haven’t found any water, so that’s a good thing.”
He said the sinkhole was not related to a 4.6-magnitude earthquake Tuesday that shook areas of Ventura County.
Caltrans filled the hole with cement Friday, but the roadwork may continue through the weekend.
Officials said Caltrans would like to completely reopen the highway before Monday because of heavy weekend traffic. But they did not know as of Friday night if they would be able to do so.
The hole was only a pothole a few days ago but grew to about 3 feet in diameter and led to the closure Thursday of eastbound Highway 126. On Friday, traffic was moving in both directions, although some lanes were closed.
Fillmore’s interim city manager and fire chief, Rigo Landeros, said it was unlikely the highway would be back to normal until after the weekend.