SF News Century-Old Subterranean Terror Blamed For Ripping Open Quiet Neighborhood Maybe we didn't take this sinkhole on Lake Street seriously enough the first time around. Investigators scoping out the scene yesterday determined the cause of the 20-foot sinkhole: a 100-year-old brick sewer line.
SF News Sinkhole Threatens To Swallow Inner Richmond Street Around 5:30 p.m. on Monday, a large sinkhole opened up beneath the intersection of Second Avenue and Lake Streets in the Inner Richmond. Several news helicopters were spotted hovering over the
