Peabody Coal Mines, Indiana and Colorado

In 2010-11, DA Smith^* was commissioned by Southern Illinois University to complete precision CSIRO HI Cell stress measurements at three Peabody Energy Corporation underground coal mines: Twentymile Coal Mine near Hayden, Colorado, and the Air Quality and Francisco Mines in southwestern Indiana. The project manager was Dr. Samuel Spearing, Associate Professor, Department of Mining and Mineral Resource Engineering, Southern Illinois University Carbondale.

^{* Formerly as Agapito Associates, Inc.}