The sound of a loud explosion and vibrations caught some residents of Cottonwood unawares Thursday morning. Fire officials say the cause was a planned blast at the slag pile on South Mingus Avenue. City officials say they have been in contact with Minerals Research, the company that is processing the slag, regarding the incident and were advised that the blast was a “test blast” to determine the effectiveness of blasting to facilitate material removal on the pile. The blasting contractor had seismographic monitors placed around the site and the results indicated the intensity levels of the blast remained well below legally permissible limits. City officials say they have been assured by Minerals Research that any additional blasting will be accompanied by prior notifications of the City and the public to avoid confusion in the future. Initial indications are that there will be no further blasting for a number of months.
So what was the vibration that shook my house on s 9th street on 9/20/19