Crews have started filling in a large sinkhole that opened up in Columbia County. The roughly 100-foot-deep hole was discovered last week off Route 61 in Centralia. The state Department of Environmental Protection says the sinkhole has nothing to do with the mine fire that's been burning in Centralia since the 1960s. DEP officials say the sinkhole was likely caused by a mine subsidence. DEP workers aren't sure how long the hole has been there but say they found no evidence that it is expanding. Officials tell our news partner Newswatch 16 large rocks and boulders are being used to fill the giant hole in Centralia.