ELLSWORTH — The Maine Department of Transportation is going to use an underground camera to help determine what caused an 8-foot by 10-foot sinkhole to form in a U.S. Route 1 intersection in Ellsworth before making a permanent fix.

Department of Transportation crews filled the hole with gravel early Tuesday after the hole formed following a Monday night storm.

Department of Transportation spokesman Mark Latti says an old, underground drainage system was undermined during the storm. The hole was filled with 10 yards of gravel.

Latti tells the Bangor Daily News officials will make a more permanent repair, but they want to diagnose the problem properly first. So they’re going to use an underground camera to investigate the drainage system.