The two-foot-deep hole was a headache for traffic, closing a lane on South Metcalf Street. Police and Fire got the call around 7:30 a.m. Thursday morning where two cars had been damaged after hitting the sinkhole. Street crews are trying to figure out what caused the pavement to collapse and used a camera to get a closer look and see how much damage was caused. The city says it could be a sewer line that runs off the mainline in that area, they will be excavating the street Friday to see the extent of the damage. The city covered the sinkhole with a metal plate until repairs can be made.