I had just started work at a cable company that was having a contractor install new cable lines for the company when they hit a gas line with one of the utility pole anchors. That was the one referenced in the wiki link that happened on Dec 11th, 1998. The truth of the story is when the city built the sidewalk, they filled in what they needed with granite blocks before they poured the sidewalk. Not being able to detect the granite block, the contractors started auguring in the anchor. It hit the buried granite block, went askew and ruptured a gas line. Underground gas lines doing a strange thing, they "wiggle around" over time and create a hole around the buried gas line. The gas escaped and followed the hole into a building. Speculation has it that either someone lit a cigarette in the gas filled build OR a water heater pilot light ignited the gas. Regardless, it blew up the entire block. One of two people were killed and a few others were injured. I was a little apprehensive about my job with the cable company as I had just started four days earlier. There were many lawsuits filed against the cable company, NSP and a few other entities.