 The sinkhole that developed Wednesday morning at Goodmore, believed to be tied to nearby mining, a limestone quarry, has been in operation in Alton for several decades. But a former Alton Township supervisor and local historian says the mining industry has roots in Alton dating back long before that. Don Huber tells the Big Z mining here is not a new thing. Limestone mining here in Alton goes back to its very origins. There were probably...