State environmental officials say subsidence of an abandoned coal mine below a Pittsburgh-area borough caused homes to shift on their foundations, prompting several evacuations.
The Pittsburgh Tribune-Review says regulators plan to fill the mine below the Mount Oliver neighborhood.
Spokesman John Poister of the Department of Environmental Protection says workers have identified a dozen homes with structural damage after the ground began shifting last week.
Some residents had suspected that a broken waterline might be to blame, but water company officials said that was unlikely due to the small volume of last week’s leak.
Poister says officials were fast-tracking their response, studying maps and compiling a report Monday. He says they hope to have cost estimates today so workers can start filling the mine by next week.